摘要:
The clumping together of expandable vinylaromatic-acrylonitrile copolymer particles during expansion of such particles is substantially completely reduced by coating the unexpanded virgin particles with from 0.2 to 1.5 weight percent, based on weight of expandable copolymer particles, of particulate magnesium oxide.
摘要:
Low density expanded polystyrene is obtained by extended exposure of particles to atmospheric steam and aging the particles in air. Particles have wrinkled cell walls.