C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/2010, 400/30
C08L 51/00 (2006.01) C08F 287/00 (2006.01) C09J 151/00 (2006.01) C09K 3/10 (2006.01)
Patent
CA 1269466
A B S T R A C T SEALANT COMPOSITION 1. A sealant composition comprises:- (a) 100 parts by weight of a silane functionalized polymer compo- nent prepared by reacting silane of formula RR'nSiY3-n (where n = 0, 1 or 2 and R is a non-hydrolyzable organic group, capable of grafting onto the polymer, R' is a non-hydrolyzable organic group incapable of grafting onto the polymer and Y is a hydrolyzable organic group) with a polymer component; said polymer component comprising an A'B' block copolymer, a multiblock copolymer having at least two end blocks A and at least one midblock B, or mixtures of an A'B' block copolymer and the multiblock copolymer wherein: the A' and A blocks comprise monoalkenyl arene blocks and the B' and B blocks comprise hydrogenated conjugated diene polymer blocks, and the average molecular weight of the A and A' blocks is greater than the minimum molecular weight needed to obtain microphase separation and domain formation of the A and A' blocks, and is less than the maximum molecular weight which would render the polymer incapable of being melt processed; the multiblock copolymer comprises a monoalkenyl arene content no more than the maximum weight per cent needed to retain a modulus suitable as a sealant in the resultant composition and no less than the minimum weight per cent needed to obtain the desired phase separation and the desired minimum cohesive strength for the resul- tant composition; and, if a B is present, (b) an amount of a midblock compatible component wherein said midblock compatible component is at a content to maintain the resultant composition in a plyable condition at roam temperature and to maintain the glass transition temperature of the resultant composition below 10 °C. DYRH04
528941
Chin Steven Soohyun
Gelles Richard
St. Clair David John
Shell Canada Limited
Smart & Biggar
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