Polymeric compositions for medical packaging and devices

• US 5,849,843 A
• Filed: 11/16/1993
• Issued: 12/15/1998
• Est. Priority Date: 11/16/1993
• Status: Expired due to Term

• Current Assignee: Baxter International Inc.
• Original Assignee: Baxter International Inc.
• Inventors: Anderson, William, Nebgen, Gregg, Buan, Angeles Lillian, Ling, Michael T. K., Rosenbaum, Larry A., Laurin, Dean, Woo, Lecon, Ding, Yuan Pang Samuel, Hayward, Denise S., Hoppesch, Joseph P., Westphal, Stanley
• Primary Examiner(s): WOODWARD, ANA LUCRECIA
• Application Number:
  US08/153,823
• Time in Patent Office: 1,855 Days
• Field of Search: 525/66
• US Class Current: 525/66
• CPC Class Codes: C08L 101/00 Compositions of unspecified macromolecular compounds
• CPC Class Codes: C08L 2203/02 for biomedical use
• CPC Class Codes: C08L 2205/08 containing additives to improve the compatibility between two polymers
• CPC Class Codes: C08L 23/02 not modified by chemical after-treatment
• CPC Class Codes: C08L 23/0815 Copolymers of ethene with aliphatic 1-olefins
• CPC Class Codes: C08L 23/0846 Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
• CPC Class Codes: C08L 23/0853 Vinylacetate
• CPC Class Codes: C08L 23/0869 Acids or derivatives thereof
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• 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 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 2666/20 Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; 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: C08L 51/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 53/02 of vinyl-aromatic monomers and conjugated dienes
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers

Abstract

Multiple component polymer compositions for fabrication into articles. In particular, polymeric compositions comprising a heat resistant polymer; a radio frequency ("RF") susceptible polymer; a compatibilizing polymer; the composition having physical properties within the range a<40,000 psi; b>=70%; c<30%; d>1.0; e<0.1%; f<0.1%; g>=0.05; h<=60%; i=0; wherein: a is the mechanical modulus of the composition measured according to ASTM D-882; b is the percent recovery in length of the composition after an initial 20% deformation; c is the optical haze of the composition being 9 mils in thickness according to ASTM D-1003; d is the loss tangent of the composition at 1 Hz measured at melt processing temperatures; e is the elemental halogen content by weight of the composition; f is the low molecular weight water soluble fraction of the composition; g is the dielectric loss between 1 and 60 MHz and over temperatures of 25° to 250° C. of the composition; h sample creep measured at 121° C. for a 1 inch strip of the composition under 27 psi loading; and, i indicates the composition exhibits no strain whitening after being strained at moderate speeds of about 20 inches (50 cm) per minute to about 100% elongation (twice the original length) and the presence of strain whitening (indicated by 1) or lack thereof (indicated by 0) is noted.

Claims

1. A polymeric composition comprising:

a heat distortion resistant polypropylene;

a radio frequency susceptible polymer having a dielectric loss greater than 0.05 at 1-60 MHz and ambient temperature to 250°

C. the radio frequency polymer being a polyamide;

a styrenic block copolymer with hydrocarbon soft segments;

a flexibilizing polymer capable of imparting flexibility to the polymeric composition, wherein the flexibilizing polymer is selected from the group consisting of ultra low density polyethylene, polybutene, and butene ethylene copolymers;

wherein the flexibilizing polymer and the heat distortion resistant polymer together comprise approximately 55% or more by weight of the polymeric composition; and

the composition having physical properties as follows;

a<

40,000 psi;

b>

=70%;

c<

30%;

d>

1.0;

e<

0.1%;

f<

0.1%;

g>

=0.05

h<

=60%;

wherein;

a is the mechanical modulus of the composition measured according to ASTM D-882;

b is the percent recovery in length of the composition after an initial 20% deformation;

c is the optical haze of the composition processed into a film 9 mils in thickness measured according to ASTM D-1003;

d is the loss tangent of the composition at 1 Hz measured at melt processing temperatures;

e is the elemental halogen content by weight of the composition;

f is the weight fraction of components capable of leaching from the composition into an aqueous phase;

g is the dielectric loss between 1 and 60 MHz and over temperatures of 25°

to 250°

C. of the composition;

h is the sample creep measured at 121°

C. for a 1 inch strip of the composition under 27 psi loading; and

wherein,

the composition exhibits no strain whitening after being strained at moderate speeds of about 20 inches (50 cm) per minute to about 100% elongation.

2. The composition of claim 1 wherein the flexibilizing polymer is an ultra low density polyethylene.

3. The composition of claim 1 wherein the flexibilizing polymer is polybutene-1.

4. A polymer based composition for fabricating into articles comprising:

a first polyolefin selected from the group consisting of polypropylene and propylene copolymers;

a second polyolefin selected from the group consisting of polyethylene, ethylene copolymers, polybutene-1, and butene-1 copolymers, the first and second polyolefin together comprise approximately 55% or more by weight of the polymeric composition;

a radio frequency susceptible polymer having a dielectric loss greater than 0.05 at 1-60 MHz and ambient temperature to 250°

C., the radio frequency polymer being a polyamide;

a styrenic block copolymer with hydrocarbon soft segments; and

the composition having a mechanical modulus of less than 40,000 psi measured according to ASTM D-882.

5. The composition of claim 4 wherein the second polyolefin is an ultra low density polyethylene.

6. The composition of claim 4 wherein the second polyolefin is a polybutene-1.

7. The composition of claim 4 wherein the styrenic block copolymer is a styrene ethylene-butene-styrene ("SEBS") block copolymer.

8. The composition of claim 7 wherein the SEBS block copolymer is maleic anhydride functionalized.

9. The composition of claim 7 wherein the radio frequency susceptible polymer is selected from a group consisting of:

aliphatic polyamides resulting from a condensation reaction of di-amines having a carbon number within the range of 2-13, aliphatic polyamides resulting from a condensation reaction of di-acids having a carbon number within a range of 2-13, polyamides resulting from the condensation reaction of dimer fatty acids, and amide containing copolymers.

10. The composition of claim 9 wherein the first polyolefin is in an amount in the range of 30-60% by weight of the composition.

11. The composition of claim 9 wherein the second polyolefin is in an amount in the range of 25-50% by weight of the composition.

12. The composition of claim 11 wherein the radio frequency susceptible polymer is in an amount within the range of 3-40% by weight of the composition.

13. The composition of claim 12 wherein the styrenic block copolymer is within the range of 5-40% by weight of the composition.

14. The composition of claim 4 wherein the radio frequency susceptible polymer is a dimer fatty acid polyamide.

15. A polymer based composition for fabricating into articles comprising:

a polypropylene in an amount within the range of 30-60% by weight of the composition;

a polyolefin in an amount within the range of 25-50% by weight of the composition, the polyolefin is selected from the group consisting of ultra low density polyethylene, polybutene, and butene ethylene copolymers;

a dimer fatty acid polyamide in an amount within the range of 5-40% by weight of the composition;

a styrene-ethylene-butene-styrene block copolymer in an amount within the range of 5-40% by weight of the composition; and

,

the polymer composition having a mechanical modulus of less than 40,000 psi when measured according to ASTM D-882.

16. The composition of claim 15 wherein the polyolefin is an ultra low density polyethylene.

17. The composition of claim 16 wherein the polyolefin is polybutene-1.

18. The composition of claim 15 wherein the styrene-ethylene-butene-styrene block copolymer is maleic anhydride functionalized.