PURPOSE: The titled composition that is made by impregnating porous particles of polyvinyl chloride with a polymer of acrylic or methacrylic alkyl ester having an alkyl group of a specific carbon number, followed by polymerization, thus being used for composite materials, because of its good flowing properties, high heat resistance and thermal stability.
CONSTITUTION: (A) Porous particles of polyvinyl chloride (100pts.wt.), preferably obtained by suspension polymerization of vinyl chloride only or a mixture thereof with other monomers, are impregnated with 2W20pts. of acrylic alkyl ester polymer composed of (B) 90W60wt% of an acrylic alkyl ester having 4W18, preferably 6W18C alkyl and (C) 10W40wt% of a methacrylic alkyl ester having 1W 4C alkyl where B+C/A is 2/100W20/100 by weight, and a polymerization initiator, and two-stage polymerization is effected where C is added, when the conversion of B reaches 50W90%, to give the objective composition. The resultant composition (100pts.wt.) is combined with an inorganic filler such as barium carbonate (2W100pts.) and, when necessary, other additives, then processed.
UENO KENJI
FURUKAWA HIROYASU
KOBAYASHI MASAHIRO
| JPS4820889A | ||||
| JP46038701A |