Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1979-10-02
1981-05-12
Seccuro, Carman J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 4575V, 260457P, 260 4595R, 260 4249, 525212, 525227, 525233, 525239, C08L 2706
Patent
active
042670845
ABSTRACT:
The present invention provides a vinyl chloride polymer composition comprising an intimate mixture of a first vinyl chloride polymer containing a sulfide linkage in the molecular chain and a second vinyl chloride polymer having a higher molecular weight than the first polymer, and a process for producing a first vinyl chloride polymer for use in the composition, comprising polymerizing vinyl chloride or a mixture of vinyl chloride and an ethylenically unsaturated monomer in the presence of a free radical initiator using as a chain transfer agent a mercapto compound or a disulfide compound. Said vinyl chloride polymer composition has been improved in heat stability and processability.
REFERENCES:
patent: 3711576 (1973-01-01), Hwa
patent: 3956251 (1976-05-01), Feiler et al.
Jour. of App. Polymer Sci., vol. 12, No. 5, May 1968, Pezzin et al., pp. 1119-1136.
Journal of App. Polymer Sci., vol. 18, 1974, Martin et al., pp. 257-266.
Maehara Takashi
Mitani Katsuo
Mizutani Yukio
Seccuro Carman J.
Tokuyama Soda Kabushiki Kaisha
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