HIGH IMPACT POLYSTYRENE HAVING IMPROVED GLOSS AND IMPACT CHARACTERISTICS

摘要

A composition and process for making it are disclosed which teach multimodal particle size high impact monovinylaromatic polymer material having good gloss properties as well as high impact strength. The bimodal particle size rubber component of the material utilizes a small amount of a very large particle size rubber and a large amount of a very small particle size rubber. The unique and advantageous method of manufacturing the material involves introducing pre-existing pellets of a rubber/polymer blend into a monomer solution also containing a rubber capable of producing particles of a different range of sizes than that of the rubber component in the pellets, and polymerizing the monomer/dissolved pellet mixture into a multimodal particle size high impact material.