Plasticized functionalized propylene copolymer adhesive composition

• US 7,645,829 B2
• Filed: 06/21/2006
• Issued: 01/12/2010
• Est. Priority Date: 04/15/2004
• Status: Expired due to Fees

• Current Assignee: ExxonMobil Chemical Patents Inc. (Exxon Mobil Corporation)
• Original Assignee: ExxonMobil Chemical Patents Inc. (Exxon Mobil Corporation)
• Inventors: Schauder, Jean-Roch H., Mathew, Thottinal Abraham, Li, Feng, Tse, Mun Fu
• Primary Examiner(s): Cain; Edward J
• Application Number:
  US11/472,063
• Publication Number:
  US 20070021566A1
• Time in Patent Office: 1,301 Days
• Field of Search: 524/515, 524/528
• US Class Current: 524/515
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 23/12 Polypropene
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C09D 123/10 Homopolymers or copolymers of propene
• CPC Class Codes: C09D 123/142 at least partially crystalline copolymers of propene with other olefins

Abstract

Disclosed herein is an adhesive composition comprising: a random propylene polymer component having a heat of fusion of between 1 and 70 J/g and an mm triad tacticity index of at least 75%; and a functionalized polymer component comprising a C₂-C₂₀ olefin comprising at least 0.1 wt % of a functional group; wherein the adhesive composition has a T-Peel adhesion on a polar substrate at 20° C. of at least 175 N/m (1 lb/in) and a T-Peel adhesion on a non-polar substrate at 20° C. of at least 175 N/m Pa (1 lb/in) and where the polarity of the polar substrate is at least 0.10 units higher than the polarity of the non-polar substrate. Methods to produce the adhesive and articles comprising the adhesive are also disclosed.

Claims

1. An adhesive composition comprising:

a random propylene polymer component having a heat of fusion of between 1 and 70 J/g and an mm triad tacticity index of at least 75%;

a functionalized polymer component comprising a C₂-C₂₀ olefin comprising at least 0.1 wt % of a functional group; and

a non-functionalized plasticizer,

wherein the adhesive composition has a T-Peel adhesion on a polar substrate at 20°

C. of at least 175 N/m (1 lb/in) and a T-Peel adhesion on a non-polar substrate at 20°

C. of at least 175 N/m Pa (1 lb/in) and where the polarity of the polar substrate is at least 0.10 units higher that the polarity of the non-polar substrate.

2. The adhesive composition of claim 1, comprising 0.1 wt % to 99 wt % of the random propylene polymer component, based on the total weight of the adhesive composition.

3. The adhesive composition of claim 1, comprising 0.1 wt % to 99 wt % of the functionalized polymer component, based on the total weight of the adhesive composition.

4. The adhesive composition of claim 1, wherein the functionalized polymer component comprises about 0.1 wt % to about 10 wt % of the functional group.

5. The adhesive composition of claim 1, wherein the functionalized polymer component comprises about 0.5 wt % to about 5 wt % of the functional group.

6. The adhesive composition of claim 1, wherein the functional group is maleic anhydride.

7. The adhesive composition of claim 1, wherein the random propylene polymer further comprises a comonomer selected from ethylene and other alpha-olefins having 4 to 6 carbon atoms.

8. The adhesive composition of claim 1, wherein the random propylene polymer has a percent elongation at break at 20°

C. of 300% or more.

9. The adhesive composition of claim 1, wherein the random propylene polymer has a flexural modulus of less than 1400 MPa.

10. The adhesive composition of claim 1 having a T-Peel adhesion on a polar substrate at 20°

C. of at least 350 N/m (2 lb/in).

11. The adhesive composition of claim 1 having a T-Peel adhesion on a polar substrate at 20°

C. of at least 525 N/m (3 lb/in).

12. The adhesive composition of claim 1 having a T-Peel adhesion on a polar substrate at 20°

C. of at least 700 N/m (4 lb/in).

13. The adhesive composition of claim 1, wherein the random propylene polymer has a weight average molecular weight Mw of 5,000,000 or less.

14. The adhesive composition of claim 1, wherein the random propylene polymer has a number average molecular weight Mn of 3,000,000 or less.

15. The adhesive composition of claim 1, wherein the random propylene polymer has a z average molecular weight Mz of 10,000,000 or less.

16. The adhesive composition of claim 1, wherein the random propylene polymer has an Mw/Mn of 1.5 to 40.

17. The adhesive composition of claim 1, wherein the random propylene polymer has a g′

index of greater than 0.99.

18. The adhesive composition of claim 1, wherein the random propylene polymer has a crystallization temperature of about 140°

C. or less.

19. The adhesive composition of claim 1, wherein the random propylene polymer has a melt flow rate greater than or equal to about 0.2 g/10 min.

20. The adhesive composition of claim 1, wherein the random propylene polymer has a heat of fusion of about 0.5 to about 35 joules per gram.

21. The adhesive composition of claim 1, further comprising at least 0.1 wt % of an amorphous polypropylene polymer grafted to isotactic polypropylene polymer, a C₂-C₂₀ polymer, an elastomer, an impact copolymer, a tackifier, a crosslinking agent, an antioxidant, a neutralizing agent, a nucleating agent, a filler, an adhesion promoter, an oil, a plasticizer, a wax, an ester polymer, or a combination comprising one or more of the foregoing.

22. The adhesive composition of claim 1, further comprising at least 0.1 wt % of homopolypropylene, isotactic polypropylene, isotactic polypropylene having greater than about 50% m-pentads, syndiotactic polypropylene, random copolymer of propylene and butane, random copolymer of propylene and hexene, polybutene, ethylene vinyl acetate, polyethylene having a density of 0.915 to less than 0.935 g/cm3, linear polyethylene having a density of 0.915 to less than 0.935 g/cm3, polyethylene having a density of 0.86 to less than 0.90 g/cm3, polyethylene having a density of 0.90 to less than 0.915 g/cm3, polyethylene having a density of 0.935 to 0.945 g/cm3, polyethylene having a density of 0.945 to 0.98 g/cm3, ethylene vinyl acetate, ethylene methyl acrylate, copolymers of acrylic acid, polymethylmethacrylate, polyvinylchloride, polybutene-1, isotactic polybutene, ABS resin, ethylene-propylene rubber (EPR), vulcanized EPR, EPDM, SBS, polyamides, polycarbonates, crossliniked polyethylene, copolymers of ethylene and vinyl alcohol, polystyrene, polyesters, polyacrylonitrile homopolymer or copolymers, thermoplastic polyamides, polyacetal, polyvinylidine fluoride, polyethylene glycols, copolymers of isobutylene and para methyl styrene, polybutadiene, polyisoprene, block copolymers of styrene and butadiene, hydrogenated block copolymers of styrene and butadiene (SEBS) or a combination comprising one or more of the foregoing.

23. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a tackifier selected from the group consisting of an aliphatic hydrocarbon resin, an aromatic modified aliphatic hydrocarbon resin, a hydrogenated polycyclopentadiene resin, a polycyclopentadiene resin, a gum rosin, a gum rosin ester, a wood rosin, a wood rosin ester, a tall oil rosin, a tall oil rosin ester, a polyterpene, an aromatic modified polyterpene, a terpene phenolic, an aromatic modified hydrogenated polycyclopentadiene resin, a hydrogenated aliphatic resin, a hydrogenated aliphatic aromatic resin, a hydrogenated terpene, a modified terpene, a hydrogenated rosin acid, a hydrogenated rosin ester, and a combination comprising one or more of the foregoing tackifiers.

24. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a tackifier comprising a hydrogenated aromatic modified resin produced from dicyclopentadiene feedstock, having a Ring and Ball softening point of 10°

C. to 150°

C.

25. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a tackifier comprising a C₅/C₆ terpene resin, a styrene terpene resin, an alpha-methylstyrene terpene resin, a C₉ terpene resin, an aromatic modified C₅/C₆ resin, an aromatic modified cyclic resin, an aromatic modified dicyclopentadiene based resin, or a combination comprising one or more of the foregoing tackifiers.

26. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a tackifier comprising a resin obtained from cationic polymerization of compositions comprising C₅ diolefins, C₅ olefins, C₆ olefins, C₉ vinylaromatics, dicyclopentadiene, methyldicyclopentadiene, terpenes, or a combination thereof.

27. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a tackifier comprising a resin, or a hydrogenated resin obtained from thermal polymerization of dicyclopentadiene, dimers or oligomers of cyclopentadiene and/or methylcyclopentadiene, and/or with vinylaromatics, or a combination thereof.

28. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a crossliniking agent selected from the group consisting of alcohols, multiols, amines, diamines, triamines, polyamines, ethylenediamine, diethylenetriamine, hexamethylenediamine, diethylaniinopropylamine, menthanediamine, and a combination thereof.

29. The adhesive composition of claim 1, further comprising at least 0.1 wt % of an antioxidant selected from the group consisting of 2,6-di-t-butyl-p-cresol, 2,4,6-tri-t-butylphenol, vitamin E, 2-t-butyl-6-(3′

-t-butyl-5′

-methyl-2′

-hydroxybenzyl)-4-methyiphenyl acrylate, 2,2′

-methylene-bis(4-methyl-6-t-butylphenyl), 2,2′

-methylene-bis(4-ethyl-6-t-butyl-phenol), 2,2′

-methylene-bis(6-cyclohexyl-4-methylphenol), 1,6-hexanediol-bis([3-(3,5-di-t-butyl[4-hydroxyphenyl])]propionate, pentaerythrityl-tetrakis-[3-(3,5-di-t-butyl-4-hydroxyphenyl)]propionate, and a combination thereof.

30. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a neutralizing agent selected from the group consisting of calcium stearate, magnesium hydroxide, aluminum hydroxide, hydrotalcite, and a combination thereof.

31. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a nucleating agent selected from the group consisting of salts of benzoic acid, sodium salt of aromatic carboxylic acid, sodium-2,2′

-methylene-bis(4,6-di-t-butylphenyl) phosphate, benzyl sorbitol, 3,4-dimethyl dibenzylidene sorbital acetal, disodium salt of cis-endo-bicylo (2.2.1) heptane-2,3-dicarboxylic acid, and a combination thereof.

32. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a filler and/or a nano-composition selected from the group consisting of titanium dioxide, calcium carbonate, barium sulfate, silica, silicon dioxide, carbon black, sand, glass beads, mineral aggregates, talc, clay, nanoclay, synthetic nanoclay, and a combination thereof.

33. The adhesive composition of claim 1, further comprising at least 0.1 wt % an adhesion promoter selected from the group consisting of polar acids, polyaminoamides, urethanes, silane ester coupling agents, titanate esters, reactive acrylate monomers, metal acid salts, polyphenylene oxide, oxidized polyolefins, acid modified polyolefins, anhydride modified polyolefins, silanes, titanates, organosilane, acrylics, acids, anhydrides, epoxy resins, hardening agents, polyamides, methylacrylates, epoxies, phenolic resins, polyisobutylene, aminoalkyl, mercaptoalkyl, epoxyalkyl, ureidoalkyl, carboxy, acrylate and isocyanurate functional silanes, mercaptopropyltrimethoxysilane, glycidoxpropyltrimethoxysilane, aminopropyltriethoxysilane, aminoethylaminopropyltrimethoxysilane, ureidopropyltrimethyloxysilane, bis-gamma-trimethoxysilyl-propylurea, 1,3,5-tris-gamma-rimethoxysilyipropylisocyanurate, bis-gamma-trimethoxysilyipropylmaleate, fumarate and gamma-methacryloxypropyltrimethoxysilane, aminopropyltriethoxysilane, and combinations and derivatives thereof.

34. The adhesive composition of claim 1, comprising 0.1 wt % to 99 wt % of the non-functionalized plasticizer, based on the total weight of the adhesive composition.

35. The adhesive composition of claim 1, wherein the non-functionalized plasticizer comprises carbon and hydrogen, and less than about 5% functional groups selected from the group consisting of hydroxide, aryls, substituted aryls, halogen, alkoxys, carboxyl, ester, carbon-carbon unsaturation, acrylates, oxygen, and nitrogen.

36. The adhesive composition of claim 1, wherein the non-functionalized plasticizer comprises C₆ to C₂₀₀ paraffins or isoparaffins having a specific gravity of 0.85 or less, a pour point of −

20°

C. or less, or a combination thereof.

37. The adhesive composition of claim 1, wherein the non-functionalized plasticizer comprises:

a distillation range having a difference between an upper temperature and a lower temperature of 40°

C. or less;

a final boiling point of 115°

C. to 500°

C.;

a number average molecular weight (Mn) between 2,000 and 100 g/mol;

a dielectric constant at 20°

C. of less than 3.0;

a viscosity of 0.5 to 20 cSt at 25°

C.;

a glass transition temperature of less than 0°

C.;

or

a combination thereof.

38. The adhesive composition of claim 1, wherein the non-functionalized plasticizer has a flash point of 20°

C. or more, a pour point of −

10°

C. or less, a viscosity index of 120 or more, or a combination thereof.

39. The adhesive composition of claim 1, wherein the non-functionalized plasticizer comprises polyalphaolefin oligomers of C₅ to C₂₀ alpha olefins.

40. The adhesive composition of claim 1, wherein the non-functionalized plasticizer comprises polyalphaolefin oligomers of 1-octene, 1-decene, 1-dodecene, or a combination thereof.

41. The adhesive composition of claim 1, wherein the non-functionalized plasticizer comprises polyalphaolefin oligomers having a kinematic viscosity at 100°

C. of 3 cSt or more, a viscosity index of 100 or more, a pour point of −

10°

C. or less, or a combination thereof.

42. The adhesive composition of claim 1, wherein the non-functionalized plasticizer comprises polyalphaolefin oligomers having a number average molecular weight of from 300 to 21,000 g/mol.

43. The adhesive composition of claim 1, wherein the non-functionalized plasticizer comprises oligomers comprising isobutylene, 1-butene, 2-butene, or a combination thereof.

44. The adhesive composition of claim 1, wherein the non-functionalized plasticizer comprises at least 0.1 wt % of an oil selected from the group consisting of an aliphatic oil, a napthenic oil, a white oil, and a combination thereof.

45. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a phthalate plasticizer.

46. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a plasticizer selected from the group consisting of di-iso-undecyl phthalate, di-iso-nonylphthalate, dioctylphthalate, and a combination thereof.

47. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a wax selected from the group consisting of polypropylene wax, polyethylene wax, Fischer-Tropsch wax, oxidized Fischer-Tropsch wax, hydroxystearamide wax, functionalized wax, amorphous wax, microcrystalline wax, beeswax, vegetable wax, petroleum wax, paraffin wax, chemically modified hydrocarbon wax, substituted amide wax, a combination thereof, and a derivative of one or more of the foregoing waxes.

48. The adhesive composition of claim 1, further comprising at least 0.1 wt % of one or more polymers having a number average molecular weight of 5000 or less, wherein the polymer comprises propylene, butene, pentene, hexene or a combination thereof.

49. The adhesive composition of claim 1, further comprising a blend, wherein the blend has two or more phases, where a discontinuous phase comprises a polyester or a propylene-based polymer, and a continuous phase comprises the propylene copolymer functionalized with a functional group.

50. The adhesive composition of claim 1, further comprising at least 0.1 wt % of a block, an antiblock, a pigment, a dye, a dyestuff, a processing aid, a UV stabilizer, a lubricant, an adjuvant, a surfactant, a color masterbatch, a flow improver, a crystallization aid, a stabilizer, a defoamer, a preservative, a thickener, a rheology modifier, a humectant, water, or a combination thereof.

51. The adhesive composition of claim 1, comprising at least 0.1 wt % of one or more stabilizers selected from the group consisting of hindered phenols, sulfur phenols, phosphorous-containing phenols, 1,3,5-trimethyl-2,4,6-tris(3-5-di-tert-butyl-4-hydroxybenzyl) benzene, pentaerythritol tetrakis-3(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, n-octadecyl-3(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 4,4′

-methylenebis (4-methyl-6-tert butylphenol), 4,4′

-thiobis(6-tert-butyl-o-cresol), 2,6-di-tert-butylphenol, 6-(4-hydroxyphenoxy)-2,4-bis(n-ocytlthio)-1,3,5-triazine, 2,4,6-tris(4-hydroxy-3,5-di-tert-butyl-phenoxy)-1,3,5-triazine, di-n-octadecyl-3,5-di-tert-butyl-4-hydroxybenzylphosphonate, 2-(n-octylthio)ethyl-3,5-di-tert-butyl-4-hydroxybenzoate, sorbitol hexa-(3,3,5-di-tert-butyl-4-hydroxy-phenyl) propionate, and combinations or derivatives thereof.

52. The adhesive composition of claim 1, further comprising a packaging adhesive, a disposable article, a consumer good, a film, a pressure sensitive adhesive, a laminate article, a fiber product, a hot melt adhesive, a carpet, a tape, a roofing element, a reflective article, a woodworking article, a label for adhering to a substrate, a bookbinding article, a roadmarking composition, a sealant composition, a paving composition, a glue stick, a pipe wrapping article, an article having a transparent pane, or a combination thereof.

53. The adhesive composition of claim 1, having a set time of 30 seconds or less.

54. The adhesive composition of claim 1, wherein the polarity of the polar substrate is at least 0.20 x^punits higher than the polarity of the non-polar substrate, wherein x^p for a given substrate “

s”

is defined by the formula;

x_s^p=γ

_s^p/γ

_s

wherein γ

_s is the surface tension of the given substrate “

s”

, and is defined by the equation;

γ

_s=γ

_s^d+γ

_s^p

where γ

_s^d is the dispersion component of the surface tension of the given substrate “

s”

, arising from dispersion-force interactions and γ

_s^p the polar component of the surface tension of the given substrate “

s”

, arising from dipolar and specific interactions.

55. The adhesive composition of claim 54, wherein the polarity of the polar substrate is at least 0.30 x^punits higher than the polarity of the non-polar substrate.

56. The adhesive composition of claim 54, wherein the polarity of the polar substrate is at least 0.40 x^punit higher than the polarity of the non-polar substrate.

57. The adhesive composition of claim 54, wherein the polarity of the polar substrate is at least 0.50 x^punits higher than the polarity of the non-polar substrate.

58. The adhesive composition of claim 54, wherein the polarity of the polar substrate is at least 0.60 x^punits higher than the polarity of the non-polar substrate.

59. The adhesive composition of claim 54, wherein the polarity of the polar substrate is at least 0.70 x^pnits higher than the polarity of the non-polar substrate.

60. The adhesive composition of claim 54, wherein the polarity of the polar substrate is at least 0.80 x^punits higher than the polarity of the non-polar substrate.

84. A molded part comprising the adhesive composition of claim 1.

85. A fiber comprising the adhesive composition of claim 1.

86. A non-woven fabric comprising the adhesive composition of claim 1.

87. A fiber at least partially coated with the adhesive composition of claim 1.

88. A non-woven fabric at least partially coated with the adhesive composition of claim 1.

61. An adhesive composition comprising:

a random propylene polymer component having a heat of fusion of between 1 and 70 J/g and an mm triad tacticity index of at least 75%;

a non-functionalized plasticizer; and

a contact product of a polymer comprising a C₂-C₂₀ olefin and at least 0.1 wt % of a functional group;

wherein the adhesive composition has a Y-Peel adhesion on a polar substrate at 20°

C. of at least 175 N/m (1 lb/in) and a T-Peel adhesion on a non-polar substrate at 20°

C. of at least 175 N/m Pa (1 lb/in) and wherein the polarity of the polar substrate is at least 0.10 units higher than the polarity of the non-polar substrate.

62. The adhesive composition of claim 61, wherein the random propylene polymer comprises:

68 to 92 mole percent propylene;

8 to 32 mole percent of a comonomer; and

wherein the adhesive composition has a T-peel adhesion to isotactic polypropylene of greater than about 595 N/m (3.4 lb/in), a T-peel adhesion to aluminum of greater than about 700 N/m (4.0 lb/in), and a T-peel adhesion to polyester of greater than about 192.5 N/m(1.1 lb/in).

63. The adhesive composition of claim 62, wherein the comonomer is ethylene.

64. The adhesive composition of claim 61, wherein the random propylene polymer comprises 13 to 23 mol % ethylene.

65. The adhesive composition of claim 61, wherein the functionalized polymer component comprises a random propylene polymer comprising about 0.1 to about 10 wt % of the functional group.

66. The adhesive composition of claim 61, wherein the functionalized polymer component comprises about 0.5 to about 5 wt % of the functional group.

67. The adhesive composition of claim 61, wherein the functional group is maleic anhydride.

68. The adhesive composition of claim 61, wherein the polarity of the polar substrate is at least 0.20 x^punits higher than the polarity of the non-polar substrate, wherein x^p for a given substrate “

s”

is defined by the formula;

x_s^p=γ

_s^p/γ

_s

wherein γ

_s is the surface tension of the given substrate “

s”

, and is defined by the equation;

γ

_s=γ

_s^d+γ

_s^p

where γ

_s^d is the dispersion component of the surface tension of the given substrate “

s”

, arising from dispersion-force interactions and γ

_s^p the polar component of the surface tension of the given substrate “

s”

, arising from dipolar and specific interactions.

69. The adhesive composition of claim 68, wherein the polarity of the polar substrate is at least 0.30 x^punits higher than the polarity of the non-polar substrate.

70. The adhesive composition of claim 68, wherein the polarity of the polar substrate is at least 0.40 x^punit higher than the polarity of the non-polar substrate.

71. The adhesive composition of claim 68, wherein the polarity of the polar substrate is at least 0.50 x^punits higher than the polarity of the non-polar substrate.

72. The adhesive composition of claim 68, wherein the polarity of the polar substrate is at least 0.60 x^punits higher than the polarity of the non-polar substrate.

73. The adhesive composition of claim 68, wherein the polarity of the polar substrate is at least 0.70 x^punits higher than the polarity of the non-polar substrate.

74. The adhesive composition of claim 68, wherein the polarity of the polar substrate is at least 0.80 x^punits higher than the polarity of the non-polar substrate.

75. A process to make an adhesive composition comprising the steps of combining a random propylene polymer having a heat of fusion of between 1 and 70 J/g;

and an mm triad tacticity index of at least 75%, a functionalized polymer component comprising a C₂-C₂₀ polymer and at least 0.1 wt % of a functional group, and a non-functionalized plasticizer, to produce the adhesive composition, wherein the adhesive composition has a T-Peel adhesion on a polar substrate at 20°

C. of at least 175 N/m (1 lb/in) and a T-Peel adhesion on a non-polar substrate of at least 175 N/m (1 lb/in) and where the polarity of the polar substrate is at least 0.10 units higher than the polarity of the non-polar substrate.

76. The process of claim 75, wherein the random propylene polymer comprises propylene and a comonomer selected from ethylene or other alpha-olefin having 4 to 6 carbon atoms.

77. The process of claim 76, wherein said propylene polymer comprises:

68 to 92 mole percent propylene; and

8 to 32 mole percent said comonomer.

78. The process of claim 75, wherein the adhesive composition has a T-peel adhesion to isotactic polypropylene of greater than about 595 N/m (3.4 lb/in), a T-peel adhesion to aluminum of greater than about 700 N/m (4.0 lb/in), and a T-peel adhesion to polyester of greater than about 192.5 N/m (1.1 lb/in).

79. The process of claim 75, wherein the polarity of the polar substrate is at least 0.20 x^punits higher than the polarity of the non-polar substrate, wherein x^p for a given substrate “

s”

is defined by the formula;

x_s^p=γ

_s^p/γ

_s

wherein γ

_s is the surface tension of the given substrate “

s”

, and is defined by the equation;

γ

_s=γ

_s^d+γ

_s^p

where γ

_s^d is the dispersion component of the surface tension of the given substrate “

s”

, arising from dispersion-force interactions and γ

_s^p the polar component of the surface tension of the given substrate “

s”

, arising from dipolar and specific interactions.

80. An article comprising an adhesive composition comprising:

a random propylene polymer component having a heat of fusion of between 1 and 70 J/g and an mm triad tacticity index of at least 75%;

a functionalized polymer component comprising a C₂-C₂₀ olefin comprising at least 0.1 wt % of a functional group; and

a non-functionalized plasticizer,

wherein the adhesive composition has a T-Peel adhesion on a polar substrate at 20°

C. of at least 175 N/m (1 lb/in) and a T-Peel adhesion on a non-polar substrate at 20°

C. of at least 175 N/m Pa (1 lb/in) and where the polarity of the polar substrate is at least 0.10 units higher that the polarity of the non-polar substrate.

81. The article of claim 80, wherein the article comprises a diaper.

82. The article of claim 80, wherein the article is a feminine hygiene product.

83. The article of claim 80, wherein the article comprises a non-woven substrate.