Blend functionalized polyolefin adhesive

• US 20040220336A1
• Filed: 04/15/2004
• Published: 11/04/2004
• Est. Priority Date: 10/15/2002
• Status: Active Grant

• Current Assignee: ExxonMobil Chemical Patents Inc. (Exxon Mobil Corporation)
• Original Assignee: ExxonMobil Chemical Patents Inc. (Exxon Mobil Corporation)
• Inventors: Brant, Patrick, Abhari, Ramin, Jiang, Peijun, Sims, Charles Lewis
• Granted Patent: US 7,541,402 B2
• Time in Patent Office: Days
• US Class Current: 525/70
• CPC Class Codes: C08F 210/06 Propene
• CPC Class Codes: C08F 255/00 Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
• CPC Class Codes: C08F 255/02 on to polymers of olefins having two or three carbon atoms
• CPC Class Codes: C08F 2800/20 as weight or mass percentages
• CPC Class Codes: C08F 8/00 Chemical modification by after-treatment graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 51/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: C09J 123/10 Homopolymers or copolymers of propene
• CPC Class Codes: C09J 151/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond

Abstract

Disclosed herein is an adhesive composition comprising a blend functionalized with a functional group, wherein the blend comprises a C3 to C40 olefin polymer and an additive, the C3 to C40 olefin polymer comprising at least 50 mol % of one or more C3 to C40 olefins, and where the C3 to C40 olefin polymer has: a Dot T-Peel of 1 Newton or more on Kraft paper; an Mw of 10,000 to 100,000; and a branching index (g′) of 0.98 or less measured at the Mz of the polymer when the polymer has an Mw of 10,000 to 60,000, or a branching index (g′) of 0.95 or less measured at the Mz of the polymer when the polymer has an Mw of 10,000 to 100,000. A process of producing the adhesive composition, as well as methods of utilizing the adhesive composition are also disclosed.

Claims

1. An adhesive composition comprising:

a blend functionalized with a functional group, wherein the blend comprises a C3 to C40 olefin polymer and at least one additive, wherein the C3 to C40 olefin polymer comprises at least 50 mol % of one or more C3 to C40 olefins and has;

a) a Dot T-Peel of 1 Newton or more on Kraft paper;

b) an Mw of 10,000 to 100,000; and

c) a branching index (g′

) of 0.98 or less measured at the Mz of the polymer when the polymer has an Mw of 10,000 to 60,000, or

d) a branching index (g′

) of 0.95 or less measured at the Mz of the polymer when the polymer has an Mw of 10,000 to 100,000.

2. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has:

a) a Dot T-Peel of 1 Newton or more on Kraft paper;

b) a branching index (g′

) of 0.98 or less measured at the Mz of the polymer;

c) a Mw of 10,000 to 60,000; and

d) a heat of fusion of 1 to 50 J/g.

3. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer is a homopolypropylene or a copolymer of propylene and up to 5 mole % ethylene having:

a) an isotactic run length of 1 to 30,

b) a percent of r dyad of greater than 20%, and

c) a heat of fusion of between 1 and 70 J/g.

4. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer comprises propylene and less than 15 mole % of ethylene.

5. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a melt viscosity of 7000 Pa·

sec or less at 190°

C.

6. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a melt viscosity of 5000 mPa·

sec or less at 190°

C.

7. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a melt viscosity of between 250 and 6000 mPa·

sec at 190°

C.

8. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a melt viscosity of between 500 and 3000 mPa·

sec at 190°

C.

9. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a Tg of 0°

C. or less.

10. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a Tg of −

10°

C. or less.

11. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has an Mw of 10,000 to 75,000 and a branching index of 0.6 or less.

12. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has an Mw of 10,000 to 50,000 and a branching index of 0.7 or less.

13. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has an Mw of 10,000 to 30,000 and a branching index of 0.98 or less.

14. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a branching index (g′

) of 0.90 or less measured at the Mz of the polymer.

15. The adhesive composition of claim 1, wherein prior to blend functionalization, the SEC graph of the C3 to C40 olefin polymer is bi- or multi-modal.

16. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has an amorphous content of at least 50%.

17. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has:

a) a peak melting point between 60 and 190°

C.;

b) a heat of fusion of 0 to 70 J/g; and

c) a melt viscosity of 8000 mPa·

sec or less at 190°

C.

18. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has:

a) a Tg of −

10°

C. or less;

b) a melt viscosity between 2000 and 6000 mPa·

sec;

c) a molecular weight distribution (Mw/Mn) of at least 5; and

d) a bi- or multi-modal SEC graph of the polymer.

19. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a crystallinity of at least 5%.

20. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has 20 wt % or more of hexane room temperature soluble fraction and 50 wt % or less of Soxhlet heptane insolubles.

21. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer comprises less than 3.0 mole % ethylene.

22. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer comprises less than 1.0 mole % ethylene.

23. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has an Mz/Mn of 2 to 200.

24. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has an Mz of 15,000 to 500,000.

25. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a SAFT of 50 to 150°

C.

26. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has a Shore A hardness of 95 or less.

27. The adhesive composition of claim 1, wherein prior to blend functionalization, the C3 to C40 olefin polymer has an Mw/Mn of 2 to 75.

28. The adhesive composition of claim 1, wherein the at least one additive includes a tackifier, a filler, an antioxidant, an adjuvant, an adhesion promoter, an oil, a plasticizer, a block, an antiblock, a pigment, a processing aid, a UV stabilizer, a neutralizer, a lubricant, a surfactant, a nucleating agent, a coupling agent, a color master batch, a polymer having a Mn below 5000, a functionalized wax, a polar wax, a non-polar wax, a polypropylene wax, a polyethylene wax, a wax modifier, an elastomer, an impact copolymer, an ester polymer, a crosslinking agent, a hydrocarbon resin, a diolefin, or a combination thereof.

29. The adhesive composition of claim 28, wherein prior to functionalization, the blend comprises about 0.1 to about 50 wt % of the at least one additive.

30. The adhesive composition of claim 29 wherein the additive comprises one or more tackifiers.

31. The adhesive composition of claim 30 wherein the tackifier is present at 5 to 50 weight %.

32. The adhesive composition of claim 1, wherein prior to blend functionalization, the blend further comprises an olefin homopolymer that is not functionalized.

33. The adhesive composition of claim 1, wherein prior to blend functionalization, the blend further comprises an olefin copolymer that is not functionalized.

34. The adhesive composition of claim 1, having a set time of 5 seconds or less.

35. The adhesive composition of claim 1, wherein the unsaturated compound units are present within the functionalized blend at from 0.1 to 50 wt %.

36. The adhesive composition of claim 1, wherein the blend is functionalized with a functional group utilizing radical copolymerization, and wherein the unsaturated compound is an unsaturated carboxylic acids, an ester of the unsaturated carboxylic acids, an acid anhydrides, a di-ester, a salt of an unsaturated carboxylic acid, an unsaturated amide, an unsaturated imide, an aromatic vinyl compound, a hydrolyzable unsaturated silane compound, an unsaturated halogenated hydrocarbon, or a combination thereof.

37. The adhesive composition of claim 1, wherein the blend is functionalized with a functional group utilizing radical copolymerization, and wherein the unsaturated compound is maleic anhydride, citraconic anhydride, 2-methyl maleic anhydride, 2-chloromaleic anhydride, 2,3-dimethylmaleic anhydride, bicyclo[2,2,1]-5-heptene-2,3-dicarboxylic anhydride, 4-methyl-4-cyclohexene-1,2-dicarboxylic anhydride, acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, mesaconic acid, crotonic acid, bicyclo(2.2.2)oct-5-ene-2,3-dicarboxylic acid anhydride, 1,2,3,4,5,&

g, lo-octahydronaphthalene-2,3-dicarboxylic acid anhydride, 2-oxa-1,3-diketospiro(4.4)non-7-ene, bicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic acid anhydride, maleopimaric acid, tetrahydrophtalic anhydride, norborn-5-ene-2,3-dicarboxylic acid anhydride, nadic anhydride, methyl nadic anhydride, himic anhydride, methyl himic anhydride, x-methyl-bicyclo(2.2.1)hept-5-ene-2,3- dicarboxylic acid anhydride (XMNA), methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, vinyltrichlorosilane, vinyltris(beta-methoxyethoxy)silane, vinyltriethoxysilane, vinyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane monovinylsilane, monoallylsilane, vinyl chloride, vinylidene chloride, or a combination thereof.

38. The adhesive composition of claim 1, wherein the blend is functionalized with a functional group utilizing radical copolymerization, a peroxide, and wherein the unsaturated compound is maleic anhydride.

39. The adhesive composition of claim 1, wherein the blend is functionalized with a functional group utilizing a solvent based functionalization process.

40. The adhesive composition of claim 1, wherein the blend is functionalized with a functional group utilizing a melt based functionalization process without solvent.

41. The adhesive composition of claim 1, wherein the blend is functionalized using selective oxidation, ozonolysis, epoxidation, or a combination thereof.

42. A process of making the adhesive composition of claim 1, comprising providing the blend, and functionalizing the blend with a functional group.

43. The process of claim 42, wherein the blend comprises a tackifier, and the unsaturated compound is maleic anhydride.

44. The adhesive of claim 1 wherein the unsaturated compound is maleic anhydride.