Polyurethane or polyurethane-urea elastomeric compositions
First Claim
1. A degradation resistant material which comprises a polyurethaneor polyurethane-urea elastomeric composition which comprises a reaction product of:
- (A) a soft segment macrodiol which is either;
(i) a homopolymer represented by formula I,
space="preserve" listing-type="equation">HO--[(CH.sub.2).sub.n O].sub.m --H Iwherein n represents an integer greater than 5 and less than 13, m is a number such that the number average molecular weight of the compound of formula I falls in the range from 218 to 5000 and optionally at least one hydrogen atom represented in formula I is substituted by a C1 to C3 alkyl group or a halogen atom;
(ii) a copolymer containing at least 25% by mass of repeating units --(CH2)n O-- wherein n is as defined in formula I above;
or(iii) a mixture of macrodiols comprising greater than 10% of a macrodiol as defined in formula I above, with the proviso that the mixture of macrodiols does not include polyethylene glycol and/or polypropylene glycol;
(B) an aliphatic or aromatic diisocyanate; and
(C) optionally a chain extender.
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Accused Products
Abstract
A polyurethane or polyurethane-urea elastomeric composition, characterized in that the composition is a reaction product of:
(A) a soft segment macrodiol which is either:
(i) a homopolymer represented by formula I,
HO--[(CH.sub.2).sub.n O].sub.m --H I
wherein n represents an integer greater than 5 and less than 13, m is a number such that the number average molecular weight of the compound of formula I falls in the range from 218 to 5000 and optionally at least one hydrogen atom represented in formula I is substituted by a C1 to C3 alkyl group or a halogen atom;
(ii) a copolymer containing at least 25% by mass of repeating units --(CH2)n O-- wherein n is as defined in formula I above; or
(iii) mixture of macrodiols comprising greater than 10% of a macrodiol as defined in formula I above;
(B ) an aliphatic or aromatic diisocyanate known in the art of polyurethane manufacture; and
(C) optionally a chain extender.
A biomaterial and a medical device which are composed wholly or partly of the polyurethane or polyurethane-urea elastomeric composition are also described.
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Citations
19 Claims
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1. A degradation resistant material which comprises a polyurethaneor polyurethane-urea elastomeric composition which comprises a reaction product of:
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(A) a soft segment macrodiol which is either; (i) a homopolymer represented by formula I,
space="preserve" listing-type="equation">HO--[(CH.sub.2).sub.n O].sub.m --H Iwherein n represents an integer greater than 5 and less than 13, m is a number such that the number average molecular weight of the compound of formula I falls in the range from 218 to 5000 and optionally at least one hydrogen atom represented in formula I is substituted by a C1 to C3 alkyl group or a halogen atom; (ii) a copolymer containing at least 25% by mass of repeating units --(CH2)n O-- wherein n is as defined in formula I above;
or(iii) a mixture of macrodiols comprising greater than 10% of a macrodiol as defined in formula I above, with the proviso that the mixture of macrodiols does not include polyethylene glycol and/or polypropylene glycol; (B) an aliphatic or aromatic diisocyanate; and (C) optionally a chain extender. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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9. A degradation resistant material according to claim 1 wherein the soft segment macrodiol is a copolymer containing at least 25% by mass of repeating units --(CH2)n O-- wherein n greater than 5 and less than 13.
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10. A degradation resistant material according to claim 8 wherein n is 6, 8 or 10.
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11. A degradation resistant material which comprises a polyurethane or polyurethane-urea elastomeric composition which comprises a reaction product of:
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(A) a soft segment macrodiol which is either; (i) a homopolymer represented by formula I,
space="preserve" listing-type="equation">HO--[(CH.sub.2).sub.n O].sub.m --H Iwherein n represents an integer greater than 5 and less than 13, m is a number such that the number average molecular weight of the compound of formula I falls in the range from 218 to 5000 and at least one hydrogen atom represented in formula I is substituted by a halogen atom; (ii) a copolymer containing at least 25% by mass of repeating units --(CH2)n O-- wherein n is as defined in formula I above;
or(iii) a mixture of macrodiols comprising greater than 10% of a macrodiol as defined in formula I above; (B) an aliphatic or aromatic diisocyanate; and (C) optionally a chain extender. - View Dependent Claims (12)
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13. An in vivo degradation resistant material which comprises a polyurethane or polyurethane-urea elastomeric composition which comprises a reaction product of:
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(A) a soft segment macrodiol which is either; (i) a homopolymer represented by formula I,
space="preserve" listing-type="equation">HO--[(CH.sub.2).sub.n O].sub.m --H Iwherein n represents an integer greater than 5 and less than 13, m is a number such that the number average molecular weight of the compound of formula I falls in the range from 218 to 5000 and optionally at least one hydrogen atom represented in formula 1 is substituted by a C1 to C3 alkyl group or a halogen atom; (ii) a copolymer containing at least 25% by mass of repeating units --(CH2)n O-- wherein n is as defined in formula I above;
or(iii) a mixture of macrodiols comprising greater than 10% of a macrodiol as defined in formula I above; (B) an aliphatic or aromatic diisocyanate; and (C) optionally a chain extender. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification