Process for the continuous manufacture of vinyl chloride polymer

Details Process for the continuous manufacture of vinyl chloride polymer Process for the continuous manufacture of vinyl chloride polymer

1979-07-30

1981-08-25

Wong, Jr., Harry

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

526216, 5263442, 526911, C08F 1406, C08F25904

Patent

active

042860784

ABSTRACT:
A process for the continuous preparation of vinyl chloride polymers containing at least 85 weight percent of polymerized vinyl chloride units in an aqueous emulsion in the presence of at least one water soluble catalyst and 1.5 to 3.5 weight percent (calculated on the monomer(s)) of at least one water soluble salt of an aliphatic, saturated monocarboxylic acid having the formula ##STR1## wherein R.sub.1 and R.sub.2 are equal or different each representing a saturated, branched or unbranched alkyl radical having 1 to 5 carbon atoms or of at least one of said water soluble salt in mixture together with at least one known emulsifier being an organic compound containing sulfonic acid-groups. The resulting polymers show an equally excellent thermostability in mixture with one of a multiplicity of known stabilizers especially of the lead-, tin- or barium/cadmium type.

REFERENCES:
patent: 3068184 (1962-12-01), Noorduyn et al.
patent: 3370031 (1968-02-01), Grommers et al.
patent: 3562229 (1971-02-01), Bauer et al.
patent: 3624051 (1971-11-01), Bauer et al.

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