The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 1983
Filed:
Jan. 29, 1982
Manfred Heimberg, Cincinnati, OH (US);
National Distillers and Chemical Corporation, New York, NY (US);
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.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile