DETAILED DESCRIPTION OF THE INVENTION Compositions of this invention have a de-inhibiting amount of diolefin rubber dispersed in vinyl monomer including at least one relatively low volatility vinyl monomer, wherein the diolefin rubber is insoluble in the vinyl monomer and at least one polyvalent metal catalyst.
It has been found that surface vinyl monomer compositions which contain diolefin rubber dispersed therein cure significantly more quickly than similar compositions which do not contain the dispersed diolefin rubber.
Further, compositions of this invention containing diolefin rubber particles show an accelerated surface cure in comparison with analogous compositions which have non-olefin rubber polymeric particles dispersed instead of the olefin rubber particles.
The acceleration of the surface cure of the vinyl monomer by the diolefin rubber is unexpected, and the mechanism of the acceleration is unknown.
The diolefin rubber is preferably present in the composition in the form of dispersed particles.
The diolefin rubber may be in the form of a homopolymer of diolefin monomer or as a copolymer of diolefin monomers.
Alternately, copolymers of diolefin monomer and copolymerizable nondiolefin monomer may be employed.
Examples of diolefin monomers which may be used to prepare diolefin polymer are 1,3-butadiene, 2-chloro-1, 3-butadiene, 2,3-dichloro-1,3-butadiene, 2-cyano-1,3 butadiene, 1,2,3,4-tetrachlorobutadiene, isoprene, 1,4-hexadiene and dicyclopentadiene.
Diolefin rubber particles polymerized from monomer comprising at least about 60 percent by weight of total monomer selected from 1,3-butadiene, 2-chloro-1,3-butadiene, 2,3-dichloro-1,3-butadiene, 2-cyano-1,3-butadiene, 1,2,3,4-tetrachlorobutadiene, isoprene, 1,4-hexadiene and dicyclopentadiene are preferred: Homo- and copolymers of 1,3-butadiene are preferred.
The diolefin rubber particles may be prepared by emulsion or suspension polymerization as is conventional in the rubber art.
In addition, natural rubber latex may be used
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Adhesives and Rubbers 
