| 摘要 |
<p>The organopolysiloxanes of this invention comprise repeating units consisting essentially of a five-membered ethylenically unsaturated heterocyclic ring containing a diorganosiloxane group bonded to the two cyclic carbon atoms adjacent to the hetero atom, which can be nitrogen, oxygen or sulfur. This invention encompasses homopolymers of said repeating units and copolymers comprising said units and diorganosiloxane units such as dimethylsiloxane. The present polymers are characterized by their high resistance to thermally induced degradation and do not exhibit a significant weight loss at temperatures up to 300 DEG C.</p> |
