C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/304, 402/487
C08F 14/06 (2006.01) C08F 14/16 (2006.01) C08F 16/12 (2006.01) C08F 18/12 (2006.01) C08F 20/00 (2006.01) C08F 20/40 (2006.01) C08F 20/68 (2006.01) C08F 22/00 (2006.01) C08F 22/18 (2006.01) C08F 22/26 (2006.01) C08F 36/16 (2006.01) C08F 114/00 (2006.01) C08F 114/06 (2006.01) C08F 114/16 (2006.01) C08F 136/16 (2006.01) C08F 214/00 (2006.01) C08F 214/06 (2006.01) C08F 214/16 (2006.01) C08F 216/12 (2006.01) C08F 218/12 (2006.01) C08F 220/00 (2006.01) C08F 220/40 (2006.01) C08F 220/68 (2006.01) C08F 222/00 (2006
Patent
CA 1126450
ABSTRACT OF THE DISCLOSURE Vinyl chloride polymers or copolymers having a rela- tively low molecular weight or degree of polymerization are prepared by a method in which an organic compound containing at least one mercapto group and at least one hydroxy or car- boxyl group per molecule is added to a monomer or monomer mixture as a chain transfer agent, and the monomer or monomer mixture is dispersed in an aqueous medium containing at least one water-soluble polymeric substance. The chain transfer agent is added in an amount much less than is conventional, due to its very high activity. The quality of the polymer products is satisfactory with respect to heat stability, occurrence of fish-eyes, particle size distribution and plas- ticizer absorption as well as ease of removing residual monomer.
260601
Kurimoto Kazuhiko
Kuwata Satoshi
Ogawa Kinya
G. Ronald Bell & Associates
Shin-Etsu Chemical Co. Ltd.
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