SPECIAL MODIFIED EXPANDABLE POLYSTYRENE COPOLYMER PARTICLE FOR LOST FOAM AND PRODUCTION METHOD THEREFOR

摘要

The present invention discloses a special modified expandable polystyrene copolymer particle for a lost foam, which respectively comprises the following parts by weight: 90 to 100 parts of styrene; 3 to 8 parts of methyl methacrylate; 100 to 140 parts of deionized water; 0.2 to 0.5 part of benzoyl peroxide; 0.2 to 0.5 part of dicumyl peroxide: 0.1 to 0.5 part of tert-butyl peroxybenzoate: 0.001 to 0.01 part of anionic surfactant; 1 to 2 parts of suspension concentrate; 5.0 to 10.0 parts of foaming agent; 0.1 to 0.4 part of nucleator; 0.2 to 2 parts of organic bromine; 0.01 to 0.1 part of molecular weight regulator having the effect of increasing molecular weight, and 0.3 to 0.5 part of surface coating agent. The special modified expandable polystyrene copolymer particle for the lost foam and a production method therefor of the present invention effectively solve the existing problem of no special EPS for lost foam casting, and have the advantages of reducing the generation of a carbon defect problem during foundry of a casting and increasing the molecular weight.

主权项

1. A special modified expandable polystyrene copolymer particle for a lost foam, characterized by comprising the following parts by weight: 90 to 100 parts of styrene; 3 to 8 parts of methyl methacrylate; 100 to 140 parts of deionized water; 0.2 to 0.5 part of benzoyl peroxide, 0.2 to 0.5 part of dicumyl peroxide; 0.1 to 0.5 part of tert-butyl peroxybenzoate; 0.001 to 0.01 part of anionic surfactant; 1 to 2 parts of suspension concentrate: 5.0 to 10.0 parts of foaming agent; 0.1 to 0.4 part of nucleator, 0.2 to 2 parts of organic bromine, 0.01 to 0.1 part of molecular weight regulator having the effect of increasing molecular weight, and 0.3 to 0.5 part of surface coating agent.