C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 23/02 (2006.01) C08J 3/24 (2006.01) C08L 21/00 (2006.01) C08L 23/10 (2006.01) C08L 23/16 (2006.01) C08L 23/22 (2006.01) C08L 61/14 (2006.01)
Patent
CA 2223190
Phenolic resin curatives having a majority of dibenzyl ether linkages were unexpectedly found to be very effective in curing unsaturated rubbers in a blend of a crystalline polyolefin and said rubber. Their effectiveness exceeds that of conventional phenolic resins for many thermoplastic vulcanizate compositions allowing for the reformulation of the recipes with lower amounts of curatives and equivalent or superior physical properties in the resulting thermoplastic vulcanizate.
On a constaté fortuitement que des catalyseurs de résines phénolique ayant une majorité de liens dibenzyloxy étaient très efficaces pour durcir des caoutchoucs de résines insaturées dans un mélange de polyoléfine cristallines et de ces caoutchouc. Pour beaucoup de compositions de vulcanisats de matières thermoplastiques, leur efficacité dépassait celle des résines phénoliques ordinaires, ce qui permettait de modifier les proportions des formulations de façon à utiliser de plus faibles quantités de catalyseurs tout en obtenant des propriétés physiques supérieures ou équivalentes de vulcanisats thermoplastiques.
Gilbertson Gary W.
Medsker Robert E.
Patel Raman
Advanced Elastomer Systems L.p.
Mcfadden Fincham
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