Tear resistant gels and articles for every uses

• US 7,226,484 B2
• Filed: 08/04/2004
• Issued: 06/05/2007
• Est. Priority Date: 04/19/1994
• Status: Expired due to Fees

• Current Assignee: Applied Elastomerics Incorporated
• Original Assignee: Applied Elastomerics Incorporated
• Inventors: Chen, John Y.
• Primary Examiner(s): Lilling; Herbert J.
• Application Number:
  US10/912,464
• Publication Number:
  US 20050008669A1
• Time in Patent Office: 1,035 Days
• Field of Search: 623/36, 623/13.12, 623/16.11, 623/20.14, 623/21.11, 623/23.4, 623/23.41, 623/23.58
• US Class Current: 623/36
• CPC Class Codes: A01K 85/00 Artificial bait for fishing
• CPC Class Codes: A61F 2/7812 Interface cushioning members placed between the limb stump and the socket, e.g. bandages or stockings for the limb stump
• CPC Class Codes: A61F 2/7843 Inflatable bladders
• CPC Class Codes: A61F 2/80 Sockets, e.g. of suction type

Abstract

Soft, tear resistant gel, gel composites and gel articles for various uses formed from one or a mixture of two or more block copolymers with or without one or more selected other polymers and additives in combination with one or more selected plasticizers being in sufficient amounts to achieve a gel rigidity of from about 20 gram Bloom to about 1,800 gram Bloom.

Claims

1. A gel article in the form of a gel liner comprising a soft gelatinous elastomer composition formed from

(I) 100 parts by weight of one or more hydrogenated controlled distribution styrene block copolymer(s) of the general configuration hydrogenated controlled distribution poly(styrene-isoprene/butadiene-styrene) block copolymer(s) selected from SEB-EB/SEBS, SEBS, SEPS, SEB/SEBS, SEP/SEPS, SEB/SEPS, SEP/SEBS, SEBn, SEPn, and SEEPS, wherein said hydrogenated controlled distribution styrene block copolymer(s) being a linear, radial, star-shaped, branched or multiarm copolymer, wherein n is greater than one;

from

(II) about 300 to about 1,600 parts by weight of one or more selected plasticizer(s) being in sufficient amounts to achieve a gel rigidity of from about 20 gram Bloom to about 1,800 gram Bloom in combination with or without

(III) a selected minor amount of one or more polymers or copolymers of poly(styrene-butadiene-styrene), poly(styrene-butadiene)n, poly(styrene-isoprene-styrene)n, poly(styrene-isoprene)n, poly(styrene-ethylene-propylene), poly(styrene-ethylene-ethylene-propylene-styrene), poly(styrene-ethylene-propylene-styrene), poly(styrene-ethylene-butylene-styrene), poly(styrene-ethylene-butylene), poly(styrene-ethylene-propylene)n, poly(styrene-ethylene-butylene)n, polystyrene, polybutylene, poly(ethylene-propylene), poly(ethylene-butylene), polypropylene, or polyethylene, polyethylene copolymers selected from ultra low density poly(ethylene-octene-1 copolymers) and copolymers of ethylene and hexene, poly(ethylene-styrene) interpolymer made by metallocene catalysts, using single site, constrained geometry addition polymerization catalysts including terpolymers of poly(ethylene/styrene/propylene), poly(ethylene/styrene/4-methyl-1-pentene), poly(ethylene/styrene/hexend-1, ethylene/styrene/octene-1), poly(ethylene/styrene/norbornene), wherein said selected copolymer is a linear, radial, star-shaped, branched multiarm block copolymer or an interpolymer, wherein n is greater than one;

said gel article comprising a gel with one or multiple rigidity regions, said gel multiple rigidity regions having no physically separable boundaries, or when said gel article is formed into a gel composite, wherein said gel being denoted by G, is in contact with a selected material M or in combination with one or more of a different gel, said gel composite is of the combination GnGn, GnGnGn, GnMn, GnMnGn, MnGnMn, MnGnGn, MnMnMnGnMn, MnGnGnMn, GnMnGnGn, GnGnMnMn, GnGnMnGnGn, GnMnMnGn, GnGnMnGnMnGnGn, GnMnGnMnMn, MnGnMnGnMnGn, GnGnMnMnGn, GnGnMnGnMn, GnGnMnGnMnGn, GnMnGnMnGn, MnMnMnGn or a permutation of one or more of said Gn with Mn;

wherein when n is a subscript of M, n is the same or different selected from the group consisting of paper, foam, plastic, fabric, metal, metal foil, concrete, wood, glass, glass fibers, ceramics, synthetic resin, synthetic fibers or refractory materials; and

wherein when n is a subscript of G, n denotes a different gel rigidity.

2. A composite according to claim 1 formed into a gel liner for lower limb or above the knee amputee prosthesis formed by injection molding, extruding, spinning, casting, or dipping of said gel, said (I) block copolymer(s) is selected from one or more linear, radial, star-shaped, branched or multiarm hydrogenated controlled distribution poly(styrene-ethylene-butylene-ethylene-butylene/styrene-ethylene-butylene-styrene), poly(styrene-ethylene-butylene/styrene-ethylene-butylene-styrene), poly(styrene-ethylene-propylene/styrene-ethylene-propylene-styrene), poly(styrene-ethylene-butylene/styrene-ethylene-propylene-styrene), and poly(styrene-ethylene-propylene/styrene-ethylene-butylene-styrene).

3. A liner according to claim 1 comprising a soft gelatinous elastomer composition formed from

(I) 100 parts by weight of one or more block copolymers of hydrogenated controlled distribution poly(styrene-ethylene-butylene-ethylene-butylene/styrene-ethylene-butylene-styrene), and poly(styrene-ethylene-butylene/styrene-ethylene-butylene-styrene), wherein said hydrogenated controlled distribution styrene block copolymer(s) being a linear, radial, star-shaped, branched or multiarm copolymer, wherein n is greater than one;

(II) one or more first plasticizers with or without one or more second plasticizers being in sufficient amounts to achieve a gel rigidity of from about 20 gram Bloom to about 1,800 gram Bloom;

said gel formed a gel liner for lower limb or above the knee amputee prosthesis formed by injection molding, extruding, spinning, casting, or dipping of said gel.

4. A composite according to claim 1 formed into a gel liner for lower limb or above the knee amputee prosthesis formed by injection molding, extruding, spinning, casting, or dipping of said gel;

said liner for;

(a.) lower extremity above the knee prosthesis with socket insert,

(b.) lower extremity, multi-durometer below the knee prosthesis with socket insert,

(c.) lower extremity below the knee prosthesis with cuff suspension interface,

(d.) lower extremity below the knee or above the knee prosthesis socket insert, suction suspension with locking mechanism, said gel liner for lower limb or above the knee amputee prosthesis formed by injection molding, extruding, spinning, casting, or dipping of said gel.

5. A gel article according to claim 1 comprising a gel with at least two different rigidity regions, said gel rigidity regions having no physically separable boundaries.

6. A gel article according to claim 1 comprising a gel with a first gel rigidity region continuous with a second gel rigidity region, said first gel rigidity region having a gel rigidity greater than said second gel rigidity region, said first and second gel rigidity regions separated by a continuous varying gel rigidity index region having physically inseparable boundaries.