C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/2041, 402/45
C08F 236/10 (2006.01) B60C 1/00 (2006.01)
Patent
CA 1208845
ABSTRACT ELASTOMERS AND TYRES CONTAINING THEM Novel copolymers of aromatic vinyl compounds and conjugated diolefins, especially styrene-butadiene copolymers having a vinyl content of at least 30%, have a differential content of the aromatic vinyl compound such that in at least one of its end portions said differential content shows a sharp and substantial increase in the direction of the outer extremity of said end portion. Styrene-butadiene copolymers of special interest are those whose percentage styrene content changes in a portion of not more than 5% of the copolymer chain (as determined by monomer conversion) from a first value to a second value, said second value being at least 25 percentage points greater than said first value; and said portion lies within a terminal 10% portion of the copolymer chain (as determined by monomer conversion). The copolymers of the invention are useful in the tread portion of tyres in that they provide improvement in rolling resistance and/or grip on wet road surfaces.
372169
Blythe Robert J.
Bond Robert
Heij Gerardus E. La
Shell Internationale Research Maatschappij B.v.
Smart & Biggar
LandOfFree
Elastomers and tyres containing them does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Elastomers and tyres containing them, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elastomers and tyres containing them will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1256348