Abstract: Provided are novel blocked polyisocyanurates to be suitably used as an adhesiveness providing agent, coating material, sealant and crosslinking agent for polymers containing active hydrogens. Also provided are polyvinyl chloride plastisol compositions comprising a polyvinyl chloride resin, the above blocked polyisocyanurate as an adhesiveness providing agent, plasticizer and a specific agent for accelerating dissociation of the blocked polyisocyanurate. These compositions have excellent properties such as high adhesiveness even cured at low temperatures and resistance to yellowing, and are suitably used particularly as sealants for car body.

Abstract: Improved bonding agent comprises a reaction product or mixture of an epoxyalkylalkoxysilane and a polyamine, and a resin composition comprising as the main ingredient conventional synthetic resin or synthetic rubber and the bonding agent as set forth above, which has excellent adhesion, particularly durability of adhesion, and is useful as an adhesive or a paint.

Abstract: Epoxy resin composition comprising a uniform mixture of an epoxy resin and fine particles of a rubber adhered uniformly on the surface thereof with fine particles of an inorganic material, said composition having improved peel strength and toughness when cured and being useful as an adhesive or a molding material.

Abstract: An improved curable epoxy resin composition comprising an epoxy resin and vulcanized rubber particles having a particle size of 0.5 to 30.mu. which are obtained by vulcanizing a dispersion of fine particles of a liquid rubber incompatible with the epoxy resin in the epoxy resin with a vulcanizing agent, and a method for the preparation of the same. The curable epoxy resin composition has excellent flexibility, mechanical strength and peel strength when cured with a curing agent, and is useful as an adhesive, coating material or molding material.