Polymer blends for use in making medical devices including catheters and balloons for dilatation catheters
First Claim
1. A catheter material formed from polymeric components, comprising:
- about 60-77% by weight of the total blend composition of a first polymeric component selected from the group consisting of polyesters and polyamides, said polyesters being prepared from the group of dicarboxylic acids selected from aromatic dicarboxylic acids having from 8 to 14 carbon atoms and aliphatic dicarboxylic acids having from 2 to 12 carbon atoms, and at least one glycol selected from the group consisting of glycols having the formula HO(CH2)n OH, where n is an integer from 2 to 10, neopentyl glycol and cyclohexane dimethanol, and said polyamides being branched or straight chain polyamides having a molecular weight of at least 5000;
about 23-40% by weight of the total blend composition of a second polymer component having a Shore hardness less than 75 D, wherein said second polymeric component is a softening ethylene copolymer, the ethylene copolymer having the formula E'"'"'X'"'"' or E'"'"'X'"'"'Y'"'"', where E'"'"' is ethylene, and is about 60-85% by weight of the ethylene copolymer, where X'"'"' is about 15-40% by weight of the ethylene copolymer, and is selected from the group consisting of methylacrylate, ethylacrylate, propylacrylate, butylacrylate and mixtures thereof, and Y'"'"' is selected from the group consisting of α
, β
-ethylenically unsaturated monocarboxylic acids, α
, β
-ethylenically unsaturated dicarboxylic acids, and anhydrides comprising about 0.5-15% by weight of the ethylene copolymer; and
less than about 2.5% by weight of the total blend composition of a compatibilizing ethylene copolymer having the formula E/X/Y whereE is ethylene,X is an α
, β
-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms, andY is an α
, β
-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with said first polymeric component.
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Accused Products
Abstract
A combination of polymeric components provides desired characteristics in forming medical instruments such as catheters and balloons for dilatation catheters. For example, a balloon material is formed from a blend of polymeric components, including a first crystalline polymeric component and a second softening polymeric component. Where the first two components are generally incompatible, the balloon material can also include a third compatibilizing agent to facilitate blending the first two polymeric components together. The first polymeric component can be a branched or straight chain polyamide having a molecular weight of at least about 5000, or a polyester prepared from aromatic dicarboxylic acids having 8 to 14 carbon atoms or aliphatic dicarboxylic acids having from 2 to 12 carbon atoms, and at least one glycol having the formula HO(CH2)n OH, where n is an integer from 2 to 10, neopentyl glycol and cyclohexane dimethanol. The second polymeric component can be a polyolefin, an ethylene copolymer, a polyester block copolymer, or a polyamide block copolymer. The third polymeric component is preferably an ethylene copolymer having the formula E/X/Y where E is ethylene; X is an α, β-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms; and Y is an α, β-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with the first polymeric component. The polymeric blend can be irradiated to enhance the properties of the balloon material, including significantly increasing burst pressures.
313 Citations
36 Claims
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1. A catheter material formed from polymeric components, comprising:
-
about 60-77% by weight of the total blend composition of a first polymeric component selected from the group consisting of polyesters and polyamides, said polyesters being prepared from the group of dicarboxylic acids selected from aromatic dicarboxylic acids having from 8 to 14 carbon atoms and aliphatic dicarboxylic acids having from 2 to 12 carbon atoms, and at least one glycol selected from the group consisting of glycols having the formula HO(CH2)n OH, where n is an integer from 2 to 10, neopentyl glycol and cyclohexane dimethanol, and said polyamides being branched or straight chain polyamides having a molecular weight of at least 5000; about 23-40% by weight of the total blend composition of a second polymer component having a Shore hardness less than 75 D, wherein said second polymeric component is a softening ethylene copolymer, the ethylene copolymer having the formula E'"'"'X'"'"' or E'"'"'X'"'"'Y'"'"', where E'"'"' is ethylene, and is about 60-85% by weight of the ethylene copolymer, where X'"'"' is about 15-40% by weight of the ethylene copolymer, and is selected from the group consisting of methylacrylate, ethylacrylate, propylacrylate, butylacrylate and mixtures thereof, and Y'"'"' is selected from the group consisting of α
, β
-ethylenically unsaturated monocarboxylic acids, α
, β
-ethylenically unsaturated dicarboxylic acids, and anhydrides comprising about 0.5-15% by weight of the ethylene copolymer; andless than about 2.5% by weight of the total blend composition of a compatibilizing ethylene copolymer having the formula E/X/Y where E is ethylene, X is an α
, β
-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms, andY is an α
, β
-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with said first polymeric component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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-
15. A balloon material formed from a blend composition of polymeric components, comprising:
-
about 60-77% by weight of the total blend composition of a first polymeric component selected from the group consisting of polyesters and polyamides, said polyesters being prepared from the group of dicarboxylic acids selected from aromatic dicarboxylic acids having from 8 to 14 carbon atoms and aliphatic dicarboxylic acids having from 2 to 12 carbon atoms, and at least one glycol selected from the group consisting of glycols having the formula HO(CH2)n OH, where n is an integer from 2 to 10, neopentyl glycol and cyclohexane dimethanol, and said polyamides being branched or straight chain polyamides having a molecular weight of at least 5000; about 23-40% by weight of the total blend composition of a second polymer component having a Shore hardness less than 75 D, wherein said second polymeric component is a softening ethylene copolymer, and the ethylene copolymer has the formula E'"'"'X'"'"' or E'"'"'X'"'"'Y'"'"', where E'"'"' is ethylene, and is about 60-85% by weight of the ethylene copolymer, where X'"'"' is about 15-40% by weight of the ethylene copolymer, and is selected from the group consisting of methylacrylate, ethylacrylate, propylacrylate, butylacrylate and mixtures thereof, and Y'"'"' is selected from the group consisting of α
, β
-ethylenically unsaturated monocarboxylic acids, α
, β
-ethylenically unsaturated dicarboxylic acids, and anhydrides comprising about 0.5-15% by weight of the ethylene copolymer; andless than about 2.5% by weight of the total blend composition of a compatibilizing ethylene copolymer having the formula E/X/Y where E is ethylene, X is an α
, β
-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms, andY is an α
, β
-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with said first polymeric component. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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-
29. A dilatation catheter balloon material formed from a blend composition of polymeric components, comprising:
-
about 60-77% by weight of the total blend composition of a first polymeric component selected from the group consisting of polyethylene-terephthalate, polybutylene-terephthalate, glycol modified polyethylene-terephthalate, 1,4-cyclohexylene dimethylene terephthalate/isophthalate copolymer, linear homopolymer esters derived from aromatic dicarboxylic acids and glycols of the general formula HO(CH2)n OH where n is an integer from 2 to 10; about 23-40% by weight of the total blend composition of a second polymeric component comprising an ethylene copolymer containing ethylene and at least one other monomer selected from the group consisting of α
, β
-ethylenically unsaturated monomers, carbon monoxide, and sulfur dioxide, said ethylene copolymer having the formula E'"'"'X'"'"' or E'"'"'X'"'"'Y'"'"', where E'"'"' is ethylene, and is about 60-85% by weight of the ethylene copolymer, where X'"'"' is about 15-40% by weight of the ethylene copolymer, and is selected from the group consisting of alkylacrylate, where the alkyl group contains 1-4 carbon atoms, and mixtures thereof, and Y'"'"' is selected from the group consisting of α
, β
-ethylenically unsaturated monocarboxylic acids, α
, β
-ethylenically unsaturated dicarboxylic acids, and anhydrides comprising about 0.5-15% by weight of the ethylene copolymer; andfrom about 0.25% to about 2.5% by weight of the total blend composition of a compatibilizing ethylene copolymer having the formula E/X/Y where E is ethylene, X is an α
, β
-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms, andY is an α
, β
-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with said first polymeric component. - View Dependent Claims (30, 31)
-
-
32. A catheter material formed from a radiation cross-linked polymeric blend, comprising:
-
about 60-77% by weight of the total blend composition of a first polymeric component selected from the group consisting of polyesters, said polyesters being prepared from the group of dicarboxylic acids selected from aromatic dicarboxylic acids having from 8 to 14 carbon atoms and aliphatic dicarboxylic acids having from 2 to 12 carbon atoms, and at least one glycol selected from the group consisting of glycols having the formula HO(CH2)n OH, where n is an integer from 2 to 10, neopentyl glycol and cyclohexane dimethanol; about 23-40% by weight of the total blend composition of a second polymer component having a Shore hardness less than 75 D, said second polymeric component comprising a softening ethylene copolymer, the ethylene copolymer having the formula E'"'"'X'"'"' or E'"'"'X'"'"'Y'"'"', where E'"'"' is ethylene and is about 60-85% by weight of the ethylene copolymer, where X'"'"' is about 15-40% by weight of the ethylene copolymer, and is selected from the group consisting of methylacrylate, ethylacrylate, propylacrylate, butylacrylate and mixtures thereof, and Y'"'"' is selected from the group consisting of α
, β
-ethylenically unsaturated monocarboxylic acids, α
, β
-ethylenically unsaturated dicarboxylic acids, and anhydrides comprising about 0.5-15% by weight of the ethylene copolymer; andless than about 2.5% by weight of the total blend composition of a compatibilizing ethylene copolymer having the formula E/X/Y where E is ethylene, X is an α
, β
-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms, andY is an α
, β
-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with said first polymeric component.
-
-
33. A balloon material formed from a radiation cross-linked polymeric blend, comprising:
-
about 60-77% by weight of the total blend composition of a first polymeric component selected from the group consisting of polyesters, said polyesters being prepared from the group of dicarboxylic acids selected from aromatic dicarboxylic acids having from 8 to 14 carbon atoms and aliphatic dicarboxylic acids having from 2 to 12 carbon atoms, and at least one glycol selected from the group consisting of glycols having the formula HO(CH2)n OH, where n is an integer from 2 to 10, neopentyl glycol and cyclohexane dimethanol; about 23-40% by weight of the total blend composition of a second polymer component having a Shore hardness less than 75 D, said second polymeric component comprising a softening ethylene copolymer, the ethylene copolymer having the formula E'"'"'X'"'"' or E'"'"'X'"'"'Y'"'"', where E'"'"' is ethylene and is about 60-85% by weight of the ethylene copolymer, where X'"'"' is about 15-40% by weight of the ethylene copolymer, and is selected from the group consisting of methylacrylate, ethylacrylate, propylacrylate, butylacrylate and mixtures thereof, and Y'"'"' is selected from the group consisting of α
, β
-ethylenically unsaturated monocarboxylic acids, α
, β
-ethylenically unsaturated dicarboxylic acids, and anhydrides comprising about 0.5-15% by weight of the ethylene copolymer; andless than about 2.5% by weight of the total blend composition of a compatibilizing ethylene copolymer having the formula E/X/Y where E is ethylene, X is an α
, β
-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms, andY is an α
, β
-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with said first polymeric component.
-
-
34. A catheter material formed from polymeric components, comprising:
-
about 60-77% by weight of the total blend composition of a first polymeric component selected from the group consisting of polyesters and polyamides, said polyesters being prepared from the group of dicarboxylic acids selected from aromatic dicarboxylic acids having from 8 to 14 carbon atoms and aliphatic dicarboxylic acids having from 2 to 12 carbon atoms, and at least one glycol selected from the group consisting of glycols having the formula HO(CH2)n OH, where n is an integer from 2 to 10, neopentyl glycol and cyclohexane dimethanol, and said polyamides being branched or straight chain polyamides having a molecular weight of at least 5000; about 23-40% by weight of the total blend composition of a second polymer component having a Shore hardness less than 75 D, wherein said second polymeric component is a softening ethylene copolymer, and said softening ethylene copolymer contains ethylene and at least one other monomer selected from the group consisting of α
, β
-ethylenically unsaturated monomers, carbon monoxide, and sulfur dioxide, and wherein when said at least one other monomer comprises an α
, β
-ethylenically unsaturated monomer and is an acid containing moiety, said α
, β
-ethylenically unsaturated monomer is partially neutralized with an ion selected from the group of sodium, potassium, zinc, lithium, calcium, and ammonium; andless than about 2.5% by weight of the total blend composition of a compatibilizing ethylene copolymer having the formula E/X/Y where E is ethylene, X is an α
, β
-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms, andY is an α
, β
-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with said first polymeric component.
-
-
35. A balloon material formed from a blend composition of polymeric components, comprising:
-
about 60-70% by weight of the total blend composition of a first polymeric component selected from the group consisting of polyesters and polyamides, said polyesters being prepared from the group of dicarboxylic acids selected from aromatic dicarboxylic acids having from 8 to 14 carbon atoms and aliphatic dicarboxylic acids having from 2 to 12 carbon atoms, and at least one glycol selected from the group consisting of glycols having the formula HO(CH2)n OH, where n is an integer from 2 to 10, neopentyl glycol and cyclohexane dimethanol, and said polyamides being branched or straight chain polyamides having a molecular weight of at least 5000; about 23-40% by weight of the total blend composition of a second polymer component having a Shore hardness less than 75 D, said second polymeric component comprising a softening ethylene copolymer, and said softening ethylene copolymer contains ethylene and at least one other monomer selected from the group consisting of α
, β
-ethylenically unsaturated monomers, carbon monoxide, and sulfur dioxide, and wherein when said at least one other monomer comprises an α
, β
-ethylenically unsaturated monomer and is an acid containing moiety, said α
, β
-ethylenically unsaturated monomer is partially neutralized with an ion selected from the group of sodium, potassium, zinc, lithium, calcium, and ammonium; andless than about 2.5% by weight of the total blend composition of a compatibilizing ethylene copolymer having the formula E/X/Y where E is ethylene, X is an α
, β
-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms, andY is an α
, β
-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with said first polymeric component.
-
-
36. A dilatation catheter balloon material formed from a blend composition of polymeric components, comprising:
-
about 60-77% by weight of the total blend composition of a first polymeric component selected from the group consisting of polyethylene-terephthalate, polybutylene-terephthalate, glycol modified polyethylene-terephthalate, 1,4-cyclohexylene dimethylene terephthalate/isophthalate copolymer, linear homopolymer esters derived from aromatic dicarboxylic acids and glycols of the general formula HO(CH2)n OH where n is an integer from 2 to 10; about 23-40% by weight of the total blend composition of a second polymeric component comprising an ethylene copolymer containing ethylene and at least one other monomer selected from the group consisting of α
, β
-ethylenically unsaturated monomers, carbon monoxide, and sulfur dioxide, and wherein when said at least one other monomer comprises an α
, β
-ethylenically unsaturated monomer and is an acid containing moiety, said α
, β
-ethylenically unsaturated monomer is partially neutralized with an ion selected from the group of sodium, potassium, zinc, lithium, calcium, and ammonium; andfrom about 0.25% to about 2.5% by weight of the total blend composition of a compatibilizing ethylene copolymer having the formula E/X/Y where E is ethylene, X is an α
, β
-ethylenically unsaturated monomer derived from at least one of alkylacrylate, alkylmethacrylate, alkyl vinyl ether, carbon monoxide, sulfur dioxide, or mixtures thereof, where the alkyl groups contain 1-12 carbon atoms, andY is an α
, β
-ethylenically unsaturated monomer containing a reactive group that forms a covalent bond with said first polymeric component.
-
Specification