Tear resistant, crystalline midblock copolymer gels and articles

CAFC
  • US 6,867,253 B1
  • Filed: 11/21/2000
  • Issued: 03/15/2005
  • Est. Priority Date: 04/19/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. A composite comprising:

  • a gel denoted by G, being in adherent contact, adhesive contact, clinging contact, fastening contact, sticking contact, or physical contact with a selected material M forming the combination GnMn, GnMnGn, MnGnMn, MnGnGnMn, GnMnMnGn, GnMnGnMnGn, MnMnMnGn, MnMnMnGnMnMnMn 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, metalic flakes, concrete, wood, glass, glass fibers, ceramics, synthetic resin, synthetic fibers or refractory materials; and

    wherein when n is a subscript of G, n denotes the same or a different gel rigidity;

    said gel comprising;

    (i) 100 parts by weight of one or more block copolymers selected from poly(styrene-ethylene-ethylene-butylene-styrene), poly(styrene-ethylene-ethylene-propylene-styrene), poly(styrene-ethylene-ethylene-butylene25-styrene), poly(styrene-ethylene-propylene-ethylene-styrene), poly(styrene-ethylene-ethylene-butylene)n, poly(styrene-ethylene-ethylene-propylene)n, poly(styrene-ethylene-ethylene-butylene25)n, poly(styrene-ethylene-propylene-ethylene)n, or mixtures thereof, wherein subscript n is two or more;

    (ii) about 300 to about 1,600 parts by weight of one or more plasticizing oils with a selected amount of at least one said plasticizing oil(s) having a viscosity of about 4 cSt at 40°

    C. and greater;

    said gel characterized by a gel gram Bloom of about 2 gram to about 1,800 gram Bloom; and

    in combination with or without (iii) a selected amount of one or more polymers or copolymers comprising poly(styrene-butadiene-styrene), poly(styrene-butadiene)n, poly(styrene-isoprene)n, poly(ethylene-styrene), poly(styrene-ethylene-propylene), 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, wherein said selected copolymer is a linear, radial, star-shaped, branched or multiarm copolymer, wherein n is greater than one;

    said gel having greater tear resistance than gels having corresponding rigidity made from a poly(styrene-ethylene-butylene-styrene) or poly(styrene-ethylene-propylene-styrene) block copolymers.

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