Abstract: The invention relates to an adhesive composition comprising (i) one or more styrenic block copolymer compositions, (ii) a tackifier resin, and (iii) one or more plasticizers, wherein said styrenic block copolymer composition comprises: a. a tetra-branched block copolymer (IV) represented by the general formula (A-B)4X; b. a tri-branched block copolymer (III) represented by the general formula (A-B)3X; c. a di-branched block copolymer (II) represented by the general formula (A-B)2X; and d. a linear diblock copolymer (I) represented by the general formula A-B; where: i. A represents a polymer block of a mono alkenyl arene; ii. B represents a polymer block of a mixture of isoprene and 1,3-butadiene in a weight ratio of isoprene to butadiene from about 70:30 to about 40:60; iii. X represents the residue of a multi-functional coupling agent; iv. the weight percent of A blocks is from about 14% to about 22%; v.
Abstract: Lithium-terminated polymers of one or more conjugated dienes and of one or more mono alkenyl arenes are coupled by reaction with an alkoxy silane coupling agent having the formula Rx—Si—(OR?)y, where x is 0 or 1, x+y=4, R and R? are the same or different, R is selected from aryl hydrocarbon radicals, linear alkyl hydrocarbon radicals and branched alkyl hydrocarbon radicals, and R? is selected from linear and branched alkyl hydrocarbon radicals, such that the resulting polymer composition contains less than about ten weight percent of uncoupled polymer diblock. The polymer compositions are subsequently selectively hydrogenated, and are useful in a variety of compounds and end use applications.
Type:
Grant
Filed:
February 28, 2005
Date of Patent:
May 22, 2007
Assignee:
Kraton Polymers US LLC
Inventors:
Harvey E. Atwood, Robert C. Bening, Mark Hageman, Dale L. Handlin, Jr., Adrie A. van der Huizen, Kimberly A. Johnson, Carl L. Willis
Abstract: A composition to be used for the manufacture of mono- or multilayer films for food-wrap applications comprising from 5 to 40 wt % of a styrenic block copolymer, a polyolefin in an amount of at least 40 wt % and optionally a resin which is compatible with the hydrogenated poly(butadiene) blocks of the styrenic block copolymer in an amount of from 0 to 25 % wt, wherein all weight percentages are relative to the weight of the complete composition; a styrenic block copolymer to be used in said composition, and mono- or multi-layer films comprising said composition.
Type:
Grant
Filed:
January 13, 2003
Date of Patent:
March 6, 2007
Assignee:
Kraton Polymers U.S. LLC
Inventors:
Gert Joly, Jacques Moerenhout, Catherine A. L. Maris, Sonja M. Oosterbosch