Abstract: A long term rapid color changing time indicator includes a front part and a back part. The front part includes a transparent layer, an opaque layer, a colorant layer, and a neutralizing layer. The colorant layer includes a matrix and a colorant having a non-migratory form that does not migrate in the matrix and having a migratory form that migrates in the matrix. The back part has a reactant. When the front part and the back part are placed in contact, the reactant migrates into the neutralizing layer and a portion of the reactant is depleted by a coreactant. The unreacted reactant migrates into the colorant layer and reacts with the non-migratory form of the colorant converting the non-migratory form to the migratory form such that the migratory form of the colorant migrates through the opaque layer to cause a visual color indication in the transparent layer.

Abstract: Vulcanizable rubber compositions are disclosed which contain co-activator of vulcanization which is a polymeric amine, that is, a hydrocarbon polymer with pendent alkyl amine groups. The co-activators impart increased rates of vulcanization with little decrease in scorch delay and very little increase in the modulus of the cured compositions. No increase in heat build-up or decrease in flex-fatigue life is shown. Typical polymers forming the backbone of the co-activators include EPDM rubber and polymers from butadiene or isoprene, with optional co-monomers.

Abstract: Butadiene polymer rubber compositions containing a polymeric activator have particularly beneficial characteristics. The activator is an interpolymer of 2-vinylpyridine monomer and 1,3-butadiene monomer, optionally with styrene, which interpolymer contains from 20% to 65% by weight of vinylpyridine units, and is mostly insoluble in boiling tetrahydrofuran.

Abstract: Butadiene polymer rubber compositions containing a polymeric activator have particularly beneficial characteristics. The activator is an interpolymer of a vinylpyridine monomer and a diene hydrocarbon monomer which interpolymer contains from 20% to 65% by weight of vinylpyridine units. Composite articles made from these rubber compositions together with contiguous portions of a dissimilar rubber compound show greater strength and adhesion as a result of the presence of a activator in the butadiene polymer rubber composition.

Abstract: Butadiene polymer rubber compositions containing a polymeric activator have particularly beneficial characteristics. The activator is an interpolymer of a vinylpyridine monomer and a diene hydrocarbon monomer which interpolymer contains from 20% to 65% by weight of vinylpyridiene units. Composite articles made from these rubber compositions together with contiguous portions of a dissimilar rubber compound show greater strength and adhesion as a result of the presence of a activator in the butadiene polymer rubber composition.

Abstract: Butadiene polymer rubber compositions containing a polymeric activator have particularly beneficial characteristics. The activator is an interpolymer of a vinylpyridine monomer and a diene hydrocarbon monomer which interpolymer contains from 20% to 65% by weight of vinylpyridine units. Composite articles made from these rubber compositions together with contiguous portions of a dissimilar rubber compound show greater strength and adhesion as a result of the presence of the activator in the butadiene polymer rubber composition.