Polymer systems suitable for blood-contacting surfaces of a biomedical device, and methods for forming
First Claim
1. In a method of forming a thermoplastic modified solid polymer the steps of thoroughly blending a minor portion of a thermoplastic polymer additive throughout a major portion of base polymer, whole said polymer additive and base are in fluid form, to form a polymer admixture, said additive comprising an essentially linear first segmented copolymer chain;
- said additive characterized by a γ
c less than said base polymer and said segmented copolymer characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C. with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-diphenyldimethylmethane.
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Abstract
A polymer admixture is formed from a base polymer and thermoplastic copolymer additive including polar hard segments and polar and nonpolar soft blocks in graft or block copolymer form. The polymer admixture is characterized by increased contact angle hysteresis and is formed into blood and tissue-contacting surfaces of a biomedical device or into textiles. A preferred additive comprises a segmented block copolymer having polydialkylsiloxanes as nonpolar soft blocks, and a polyurethane as hard segments and a polyalkylene oxide as a polar soft block.
333 Citations
61 Claims
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1. In a method of forming a thermoplastic modified solid polymer the steps of thoroughly blending a minor portion of a thermoplastic polymer additive throughout a major portion of base polymer, whole said polymer additive and base are in fluid form, to form a polymer admixture, said additive comprising an essentially linear first segmented copolymer chain;
- said additive characterized by a γ
c less than said base polymer and said segmented copolymer characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C. with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-diphenyldimethylmethane. - View Dependent Claims (2, 3, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27)
- said additive characterized by a γ
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4. In a method of forming a thermoplastic modified solid polymer the steps of thoroughly blending a minor portion of a thermoplastic polymer additive throughout a major portion of a base polymer, while said polymer additive and base polymer are in fluid form, to form a polymer admixture, said additive comprising an essentially linear first segmented copolymer chain;
- said additive characterized by a γ
c less than said base polymer and said segmented copolymer characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C., wherein said soft blocks control the surface properties of said modified solid polymer, with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-diphenyldimethyl- methane. - View Dependent Claims (5)
- said additive characterized by a γ
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26. The method according 1, 2, 4 or 5 wherein said modified solid polymer is formed into a textile or component of the same.
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28. In a method of forming a polymer admixture, the steps of
(a) thoroughly dispersing no greater than about 5 volume % of a copolymer additive throughout at least 95 volume % of a base polymer, while said copolymer additive and base polymer are in fluid form, to form a polymer admixture, said copolymer additive comprising a nonpolar soft poly (dialkysiloxane) segment component chemically bonded to a polar hard polyurethane segment, said copolymer additive being characterized by a γ -
c less than said base polymer admixture being characterized by a γ
c between about 10 and 35 dyne/cm., and(b) solidifying said polymer admixture.
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c less than said base polymer admixture being characterized by a γ
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29. A biomedical device or component of the same, including a blood-compatible, blood-contacting surface formed of a polymer admixture comprising at least 95 volume % of a base polymer and no greater than 5 volume % of a polymer additive comprising a first homopolymer component chemically bonded to at least a second homopolymer component of a different type than said first component, said polymer additive being dispersed throughout said base polymer and being characterized by a γ
-
c less than said base polymer, said polymer admixture being characterized by a γ
c between about 10 and 35 dyne/cm. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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c less than said base polymer, said polymer admixture being characterized by a γ
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40. A modified solid polymer blend formed of a base polymer and a solid thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising a first essentially linear segmented copolymer chain and a second essentially linear polymer chain chemically bonded to said segmented copolymer chain, said second polymer chain comprising a polar homopolymer; -
said additive characterized by γ
c less than said base polymer and said first segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C.;said polar homopolymer characterized by the presence of at least one second polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., said polar hard segments independently selected from the group consisting of a polyurethane and polycarbonate of 4,4'"'"'-diphenylmethylmethane, wherein said nonpolar and polar soft blocks control the surface properties of said modified solid polymer blend.
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41. A modified, solid polymer and a solid thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising an essentially linear segmented copolymer chain; - said additive characterized by γ
c less than said base polymer and said segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature below 37°
C. said additive further comprising a second essentially linear polymer chain chemically bonded to said segmented copolymer chain, said second polymer chain selected from a polar homopolymer or a second segmented copolymer, said second segmented copolymer or polar homopolymer characterized by the presence of at least one second polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., said polar hard segments independently selected from the group consisting of a polyurethane and a polyurethaneurea, and said second segmented copolymer further characterized by the presence of a polar soft block having a glass transition temperature or crystalline melting temperature below 37°
C. with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-diphenyldimethylmethane; and
wherein said base polymer and said polar hard segments are formed of the same type of homopolymer.
- said additive characterized by γ
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42. A method of forming an exposed blood-contacting surface of biomedical device or component thereof of low surface free energy and increased contact angle hysteresis comprising the steps of
(a) reacting up to about 2 volume % of a reactive polysiloxane oligomer with at least 98 volume % of a base polymer, while said oligomer and base polymer are in fluid from to form a fluid polymer admixture of at least 95 volume % pure base polymer and no greater than 5 volume % of a copolymer of said base polymer and said oligomer, and (b) solidifying said polymer admixture, said copolymer comprising an essentially linear segmented copolymer chain; - said copolymer characterized by a γ
c less than said base polymer and said segmented chain characterized by the presence of at least one polar hard polyurethane or polyurethaneurea segment having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar polysiloxane soft block having a glass transition temperature or crystalline melting temperature below 37°
C. with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-di-phenyldimethylmethane and said polymer admixture being characterized by a γ
c between about 10 and 35 dyne/cm. - View Dependent Claims (43, 44)
- said copolymer characterized by a γ
-
45. In method of forming the exposed blood-contacting surface of a biomedical device, or components thereof, the steps of
(a) thoroughly dispersing no greater than about 5 volume % of a polymer additive throughout at least 95 volume % of a base polymer, while said polymer additive and base polymer are in fluid form, to form a polymer admixture, said polymer additive comprising a thermoplastic segmented block copolymer characterized by the presence of at least one polar hard segment of from 1 to 10 repeating monomer units, said segment selected from the group consisting of a polyurethane and a polyurethaneurea and having a glass transition temperature or crystalline melting temperature above 37° - C. and a nonpolar soft block having a glass transition temperature or a crystalline melting temperature below 37°
C., said polymer additive being characterized by a γ
c between about 10 and 35 dyne/cm; and(b) solidifying said polymer mixture and (c) depositing said polymer mixture as a film onto a biomedical device or component thereof. - View Dependent Claims (46, 47, 48)
- C. and a nonpolar soft block having a glass transition temperature or a crystalline melting temperature below 37°
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49. A polymeric blood-contacting surface of a biomedical device or component thereof comprising at least 95 volume % of a base polymer and no greater than 5 volume % of a solid polymer additive comprising a poly(dialkysiloxane) block chemically bonded to a polyurethane segment of from 1 to 10 repeating monomer units said polymer additive being dispersed throughout said base polymer and being characterized by a γ
-
c less than said base polymer, said polymer admixture being characterized by a γ
c between about 10 and 35 dyne/cm.
-
c less than said base polymer, said polymer admixture being characterized by a γ
-
50. A modified solid polymer blend formed of a base polymer including end groups capable of hydrogen bonding or reacting with proteins and a solid thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising a first essentially linear segmented copolymer chain and a second essentially linear polymer chain chemically bonded to said first segmented copolymer chain, said second polymer chain being selected from a polar homopolymer or a second segmented copolymer said additive characterized by a γ -
c less than said base polymer and said first segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C.;said second segmented copolymer or polar homopolymer characterized by the presence of at least one second polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and said second segmented copolymer further characterized by the presence of a polar soft block having a glass transition temperature or crystalline melting temperatures below 37°
C., said polar hard segments independently selected from the group consisting of a polyurethane and a polyurethaneura wherein said nonpolar and polar soft blocks control the surface properties of said modified solid polymer blend; andsaid base is selected from the group consisting of a polyurethane, polyester, polyesterether, polyamide, polyether-polyamide, styrene-isoprene, styrene-butadiene, thermoplastic polyolefin, styrene-saturated olefin, polyester-polyester, ethylenevinyl acetate, ethylene-ethylacrylate, ionomers and thermoplastic polydiene.
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c less than said base polymer and said first segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
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51. A modified, solid polymer formed of a base polymer including end groups capable of hydrogen bonding or reacting with proteins and a solid thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising an essentially linear segmented copolymer chain; - said additive characterized by γ
c less than said base polymer and said segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperature of crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature below 37°
C. said additive further comprising a second essentially linear polymer chain chemically bonded to said segmented copolymer chain, said second polymer chain being selected from a polar homopolymer or a second segmented copolymer, said second segmented copolymer or polar homopolymer characterized by the presence of at least one second polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., said polar hard segments independently selected from the group consisting of a polyurethane and a polyurethaneurea, and said second segmented copolymer further characterized by the presence of polar soft block having a glass transition temperature or crystalline melting temperature below 37°
C.; andsaid base polymer is selected from the group consisting of a polyurethane, polyester, polyester-polyether, polyamide, polyether-polyamide, styrene-isoprene, styrene-butadiene, thermoplastic polyolefin, styrene-saturated olefin, polyester-polyester, ethylene-vinyl acetate, ethylethylacrylate, ionomers, and thermoplastic polydiene.
- said additive characterized by γ
-
52. A modified solid polymer blend formed of a base polymer comprising a segmented block polymer and a solid thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising a first essentially linear segmented copolymer chain and a second essentially linear polymer chain chemically bonded to said first segmented copolymer chain, said second polymer chain being selected from a polar homopolymer or a second segmented copolymer said additive characterized by a γ -
c less than said base polymer and said first segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperatures or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C.;said second segmented copolymer or polar homopolymer characterized by the presence of at least one second polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and second segmented copolymer further characterized by the presence of a polar soft block having a glass transition temperature or crystalline melting temperature below 37°
C., said polar hard segments independently selected from the group of a polyurethane and a polyurethaneurea wherein said nonpolar and polar soft blocks control the surface properties of said modified solid polymer blend; andsaid base polymer is selected from the group consisting of a polyurethane, polyester, polyester-polyether, polyamide, polyether-polyamide, styrene-isoprene, styrene-butadiene, thermoplastic polyolefin, styrene-saturated olefin, polyester-polyester, ethylenevinyl acetate, ethylene-ethylacrylate, ionomers and thermoplastic polydiene.
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c less than said base polymer and said first segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperatures or crystalline melting temperature above 37°
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53. A modified, solid polymer formed of a base polymer comprising a segmented block copolymer and a solid thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising an essentially linear segmented copolymer chain; - said additive characterized by a γ
c less than said base polymer and said segmented copolymer chain characterized by the presence of at least one polar hard segment having a transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature below 37°
C. said additive chemically bonded to said segmented copolymer chain, said second polymer chain being selected from a polar homopolymer or a second segmented copolymer, said second segmented copolymer or polar homopolymer characterized by the presence of at least one second polar hard segment having a glass transition temperature or crystalline melting temperature 37°
C., said polar hard segments independently selected from the group consisting of a polyurethane and a polyurethaneurea, and said second segmented copolymer further characterized by the presence of a polar soft block having a glass transition temperature or crystalline melting temperature below 37°
C.; andsaid base polymer is selected from the group consisting of a polyurethane, polyester, polyester-polyether, polyamide, polyether-polyamide, styrene-isoprene, styrene-butadiene, thermoplastic polyolefin, styrene, saturated olefin, polyester-polyster, ethylene-vinyl acetate, ethylethylacrylate, ionomers, and thermoplastic polydiene.
- said additive characterized by a γ
-
54. A modified solid polymer blend formed of a segmented polyurethane base polymer and a solid thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising a first essentially linear segmented copolymer chain and a second essentially linear polymer chain chemically bonded to said first segmented copolymer chain, said second polymer chain being selected from a polar homopolymer or a second segmented copolymer said additive characterized by a γ -
c less than base polymer and said first segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C.;said second segmented copolymer or polar homopolymer characterized by the presence of at least one second polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and said second segmented copolymer further characterized by the presence of a polar soft block having a glass transition temperature or crystalline melting temperature below 37°
C., said polar hard segments independently selected from the group consisting of a polyurethane and a polyurethaneurea with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-diphenylmethylmethane, wherein said nonpolar and polar soft blocks control the surface properties of said modified solid polymer blend. - View Dependent Claims (55)
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c less than base polymer and said first segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
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56. A modified, solid polymer formed of a segmented polyurethane base polymer and a solid thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising an essentially linear segmented copolymer chain; - said additive characterized by a γ
c less than said base polymer and said segmented copolymer chain characterized by the presence of at least one polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature below 37°
C. said additive further comprising a second essentially linear polymer chain chemically bonded to said segmented from a polar homopolymer or a second segmented copolymer, said second segmented copolymer or polar homopolymer characterized by the presence of at least one second polar hard segment having a glass transition temperature or crystalline melting temperature above 37°
C., polar hard segments independently selected from the group consisting of a polyurethane and a polyurethaneurea, and said second segmented copolymer further characterized by the presence of a polar soft block having a glass transition temperature or crystalline melting temperature below 37°
C. with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-diphenyldimethylmethane. - View Dependent Claims (57)
- said additive characterized by a γ
-
58. A modified solid polymer formed of a bas polymer formed of a homopolymer and characterized by a glass transition temperature below 140°
- C. and a thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising an essentially linear segmented copolymer chain;
said additive characterized by γ
c less than said base polymer and said segmented copolymer chain characterized by the presence of at least one polar hard segment formed of said same homopolymer comprising said base polymer and having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C. with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-diphenyldimethylmethane.
- C. and a thermoplastic segmented block copolymer additive blended with said base polymer,
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59. A modified solid formed of a base formed of a homopolymer, and a thermoplastic segmented block copolymer additive blended with said base polymer said modified solid polymer characterized by a relative contact angle hysteresis greater than that of said base polymer,
said additive comprising an essentially linear segmented copolymer chain; - said additive characterized by a γ
c less than said base polymer and said segmented copolymer chain characterized by the presence of at least one polar hard segment formed of said same homopolymer comprising said base polymer and having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C. with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-diphenyldimethylmethane.
- said additive characterized by a γ
-
60. A modified solid polymer formed of a base polymer formed of a homopolymer, and a thermoplastic segmented block copolymer additive blended with said base polymer,
said additive comprising an essentially linear segmented copolymer chain; - said additive characterized by a γ
c less than said base polymer and said segmented copolymer chain characterized by the presence of at least one polar hard segment formed of said same homopolymer comprising said base polymer and having a glass transition temperature or crystalline melting temperature above 37°
C., and a nonpolar soft block having a glass transition temperature or crystalline melting temperature below 37°
C. with the proviso that said base polymer is not a polycarbonate of 4,4'"'"'-diphenyldimethylmethane;
wherein said soft blocks control the surface properties of said modified solid polymer.
- said additive characterized by a γ
-
61. A blood-contacting surface of a biomedical device or component of said device comprising a polymer admixture of low surface free energy, said admixture formed by
(a) reacting about 0.0002 to 2 volume % of a homopolymer additive with at least 98 volume % of a base polymer, while said homopolymer additive and base polymer are in fluid form to form a fluid polymer admixture of at least 95 volume % pure base polymer and no greater than 5 volume % of a copolymer of said base polymer and said homopolymer additive, and solidifying said polymer admixture, said additive polymer being characterized by a γ -
c less than said base polymer and said polymer admixture being characterized by a γ
c between about 10 and 35 dyne/cm.
-
c less than said base polymer and said polymer admixture being characterized by a γ
Specification