Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1982-01-29
1983-10-11
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524533, 526 80, 526 87, C08L 3308, C08L 3310
Patent
active
044093551
ABSTRACT:
A process is disclosed for preparing copolymer latices possessing a solids content of at least about 60 weight percent and a viscosity not exceeding 15,000 cp. Brookfield Viscosity (RVF, Spindle No. 4) at 2 rpm from (a) vinyl acetate in an amount representing from about 10 weight percent to about 95 weight percent of total monomer charge, and (b) at least one monomer selected from the group consisting of acrylate ester, methacrylate ester and vinyl ester of an alpha-branched saturated monocarboxylic acid representing the balance of the total monomer charge. The aforesaid latices are prepared by polymerizing in a single reaction stage at least 10 weight percent of the total vinyl acetate monomer (a) and from 0 to about 50 weight percent of the total acrylate ester, methacrylate ester and/or vinyl ester of alpha-branched saturated monocarboxylic acid monomer (b) in an aqueous emulsion reaction medium containing a polymerization catalyst, and thereafter polymerizing in said reactor in a second stage the remaining portion of the total vinyl acetate monomer (a) together with the remaining portion of the acrylate ester, methacrylate ester, and/or vinyl ester of alpha-branched saturated carboxylic acid monomer (b) in the reaction medium containing additional catalyst if needed, polymerization being continued substantially to completion.
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VV 10 Vinyl Monomer product brochure of Shell Chemical Company 1966.
Michl Paul R.
National Distillers and Chemical Corporation
Tremain Kenneth D.
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