| 摘要 |
A blend suitable for preparing low density cellular products comprises (1) a vinyl chloride resin, e.g., polyvinyl chloride; (2) a rubber, e.g., butadiene- acrylonitrile; and (3) a polymerisable monomer, e.g., styrene. Insulation products such as sheets or tubes (for pipe insulation) are easily fabricated by freely expanding (i.e., without employing forming molds) blends of the invention which contain heat activated blowing agents. |
