Polymeric article having high tensile energy to break when hydrated
First Claim
1. An article, suitable for use as a body implant, having been formed from a multiple phase polymeric composition comprising:
- (a) a first phase which is continuous and comprises a substantially non-hydrophilic polymeric component capable of absorbing water in an amount of no more than about 30% by weight based on the weight of the non-hydrophilic polymer; and
(b) a second phase which comprises a hydrophilic polymeric component capable of absorbing at least about 50% water, by weight based on the weight of the hydrophilic polymer;
wherein said article (i) is capable of absorbing water to an extent that it softens with a softening ratio of at least about 2;
1 or swells with a swelling ratio of at least about 1.3;
1; and
(ii) has an energy to break of at least about 700 N-cm/cm3 and a 2.5% Secant modulus of less than about 7,000 N/cm2, when substantially completely hydrated.
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Accused Products
Abstract
An article, suitable for use as a body implant, is made from a novel composition comprising a multiple phase polymer composition comprising:
(a) a first phase which comprises a substantially non-hydrophilic polymeric component; and
(b) a second phase which comprises a hydrophilic polymeric component;
said composition (i) being capable of absorbing water to an extent that it softens with a softening ratio of at least about 2:1 and/or swells with a swelling ratio of at least about 1.3:1; and (ii) when substantially completely hydrated has an energy to break of at least about 700 N-cm/cm3 and a 2.5% Secant modulus of less than about 7,000 N/cm2.
204 Citations
30 Claims
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1. An article, suitable for use as a body implant, having been formed from a multiple phase polymeric composition comprising:
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(a) a first phase which is continuous and comprises a substantially non-hydrophilic polymeric component capable of absorbing water in an amount of no more than about 30% by weight based on the weight of the non-hydrophilic polymer; and (b) a second phase which comprises a hydrophilic polymeric component capable of absorbing at least about 50% water, by weight based on the weight of the hydrophilic polymer; wherein said article (i) is capable of absorbing water to an extent that it softens with a softening ratio of at least about 2;
1 or swells with a swelling ratio of at least about 1.3;
1; and
(ii) has an energy to break of at least about 700 N-cm/cm3 and a 2.5% Secant modulus of less than about 7,000 N/cm2, when substantially completely hydrated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An tubular article suitable for use as a catheter or cannula the walls of which have been formed from a multiple phase polymeric composition comprising a physical mixture of:
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(a) a first phase which is continuous and comprises a substantially non-hydrophilic polymeric component capable of absorbing water in an amount of no more than about 30% by weight based on the weight of the non-hydrophilic polymer; and (b) a second phase which comprises a hydrophilic polymeric component capable of absorbing at least about 50% water, by weight based on the weight of the hydrophilic polymer; wherein said article (i) is capable of absorbing water to an extent that it softens with a softening ratio of at least about 2;
1 a swelling ratio of at least about 1.3;
1; and
(ii) has an energy to break of at least about 700 N-cm/cm3 and a 2.5% Secant modulus of less than about 7,000 N/cm2, when substantially completely hydrated. - View Dependent Claims (18, 19)
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20. An article suitable for use as a body implant, having been formed from a multiple phase polymeric composition comprising:
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(a) a first phase which is continuous and comprises a substantially non-hydrophilic polyurethane; and (b) a second phase which comprises a hydrophilic polyethylene oxide; wherein said article (i) is capable of absorbing water to an extent that it softens with a softening ratio of at least about 2;
1 or swells with a swelling ratio of at least about 1.3;
1; and
(ii) has an energy to break of at least about 700 N-cm/cm3 and a 2.5% Secant modulus of less than about 7,000 N/cm2, when substantially completely hydrated. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A tubular article suitable for use as a catheter or cannular the walls of which have been formed from a multiple phase polymeric composition comprising a physical mixture of:
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(a) a first phase which is continuous and comprises a substantially non-hydrophilic polyurethane; and (b) a second phase which comprises a hydrophilic polyethylene oxide; wherein said article (i) is capable of absorbing water to an extent that it softens with a softening ratio of at least about 2;
1 or swells with a swelling ratio of at least about 1.3;
1; and
(ii) has an energy to break of at least about 700 n-cm/cm3 and a 2.5% Secant modulus of less than about 7,000 N/cm2, when substantially completely hydrated.
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Specification