Viscoelastic elastomer gel compositions

Abstract

A composite article, which may be beneficially applied to the skin, includes a thermoplastic gelatinous elastomer composition, which is formed into a composite by heat with a substrate material. The gelatinous elastomer includes at least one hydrogenated styrene/isoprene/butadiene block copolymers and at least one polymer or copolymer of the group poly(styrene-butadiene-styrene), poly(styrene-butadiene), poly(styrene-isoprene-styrene), poly(styrene-isoprene), poly(styrene-ethylene-propylene), poly(styrene-ethylene-propylene-styrene), poly(styrene-ethylene-butylene-styrene) or poly(styrene-ethylene-butylene). The thermoplastic gelatinous elastomer composition further includes a non-oil plasticizer, which may be a specialty ester, an animal-derived non-oil material for imparting an esthetic property and emolliency to a cosmetic formulation, or a combination thereof. The specialty esters preferably include long-chain fatty acids estified with long-chain alcohols and gycols. The animal-derived non-oil material may include lanolin, a derivative of lanolin, squalene, a cholesterol ester or a combination thereof. The thermoplastic gelatinous elastomer composition avoids the use of plasticized oil.

1 - 7 . (canceled) 
     
     
         8 . A gelatinous elastomer composition comprising a block copolymer. 
     
     
         9 . The gelatinous elastomer composition according to  claim 8 , wherein said block copolymer is about 20% to 40% by weight of said gelatinous elastomer composition. 
     
     
         10 . The gelatinous elastomer composition according to  claim 8 , further comprising a fatty acid. 
     
     
         11 . The gelatinous elastomer composition according to  claim 8 , wherein the block copolymer comprises a styrene derived end block. 
     
     
         12 . The gelatinous elastomer composition according to  claim 8 , wherein the block copolymer is a styrene-ethylene/butylene-styrene copolymer, a styrene-ethylene/propylene-styrene copolymer, a hydrogenated styrene-isoprene/butadiene copolymer, a hydrogenated styrene-isoprene copolymer, a hydrogenated styrene-ethylene/butylene-styrene copolymer, a styrene isoprene/butadiene copolymer, a hydrogenated styrene isoprene block copolymer, or a hydrogenated styrene-ethylene/butylene-styrene copolymer.