Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1980-10-01
1982-12-07
Briggs, Sr., Wilbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
16 2, 524526, 525124, 525125, 525232, 525236, C08K 304
Patent
active
043628400
ABSTRACT:
A soft, heat and fatigue resistant vulcanizate adapted for transmitting load between moving mechanical parts comprising (a) 100 parts by weight of crosslinked elastomer consisting essentially of (i) natural or synthetic polyisoprene rubber, and (ii) elastomeric polybutadiene made from monomers consisting essentially of butadiene at a weight ratio of (i) to (ii) of about 1:10 to 10:1, (b) about 10-75 parts by weight of substantially internally saturated, substantially linear polymer that (i) is made from monomers consisting essentially of isobutylene, (ii) is a strain crystallizable, elastic solid at 20.degree. C. and (iii) has a viscosity average molecular weight (Flory) above about 1.3 million, (c) said elastomer being crosslinked with a curative comprising a curing agent selected from the group consisting of (i) a sufficient amount of sulfur to provide an efficient or semi-efficient vulcanization of said crosslinkable elastomer, (ii) isocyanate or blocked isocyanate in an amount sufficient to crosslink said crosslinkable elastomer and (iii) isocyanate or blocked isocyanate and sulfur in amounts sufficient to crosslink said crosslinkable elastomer and (d) 5-200 parts by weight particulate comprising carbon black, wherein said polymer of (b) is dispersed throughout said elastomer of (a) in a discrete microscopic phase.
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Killgoar, Jr. Paul C.
Lemieux Marvin A.
Tabar Ronald J.
Briggs Sr. Wilbert J.
Ford Motor Company
Lilling Herbert J.
May Roger L.
Melotik Lorraine S.
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