초록 ▼

A microencapsulatable solvent adhesive composition for coupling plastic conduits, such as pipes, connectors and related fittings comprises a water-insoluble polymer and a mixture of volatile organic solvents for the polymer, each of the solvents having 6 to 40 carbon atoms. This solvent adhesive com

A microencapsulatable solvent adhesive composition for coupling plastic conduits, such as pipes, connectors and related fittings comprises a water-insoluble polymer and a mixture of volatile organic solvents for the polymer, each of the solvents having 6 to 40 carbon atoms. This solvent adhesive composition is suitable for microencapsulation by aqueous-based microencapsulation processes. A plurality of microcapsules encapsulating the solvent adhesive composition are bound to a polymeric surface of a conduit, such as a pipe connector or fitting, by a binder composition, to form a surface coated with a layer of rupturable microcapsules. When the microcapsules are ruptured upon joining of the coated conduit to a second conduit, the volume of the released solvent adhesive composition is sufficient to cement the surfaces together.

대표청구항 ▼

[ We claim:] [1.] A method of applying microcapsules to a polymeric wall surface, comprising the steps of:(a) providing a plurality of microcapsules encapsulating a volume of a solvent adhesive that comprises (i) 3 to 20 parts by weight of a water-insoluble polymer that is the same as or is derived

[ We claim:] [1.] A method of applying microcapsules to a polymeric wall surface, comprising the steps of:(a) providing a plurality of microcapsules encapsulating a volume of a solvent adhesive that comprises (i) 3 to 20 parts by weight of a water-insoluble polymer that is the same as or is derived from that of the polymeric wall surface, and is selected from the group consisting essentially of polyvinylchloride, chlorinated polyvinylchloride, acrylonitrile-butadiene-styrene, polyacrylates, polystyrene, polycarbonates, and homopolymers and copolymers thereof, and (ii) 80 to 97 parts by weight of a mixture of volatile organic solvents, each of said solvents comprising 6 to 40 carbon atoms, and wherein each of said solvents in the mixture of solvents is a solvent for the water-insoluble polymer defined in (i);(b) providing a polymeric wall surface comprising a polymer that is the same as or is derived from the water-insoluble polymer of (a);(c) coating a portion of the wall surface with a binder composition that comprises a polymer that is the same as or is derived from the polymer of the wall surface and 50 to 95 parts by weight of a volatile organic compound that is a solvent for both polymers; and(d) applying the plurality of microcapsules to the coated portion of the wall surface.