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:
Dec. 15, 1981
Filed:
Oct. 23, 1979
Ian H McEwan, Kleinburg, CA;
Manubhai B Patel, Scarborough, CA;
Canadian Industries Limited, Montreal, CA;
Abstract
Improved process for the preparation of aqueous emulsions of addition copolymers having functional groups to provide thermosetting capability via condensation. The process improvement resides in reducing the amount of unwanted premature condensation of the functional group. The process has two steps, one consisting of polymerizing a portion of the monomer reactants at a temperature not above 60.degree. C. if the functional group is present and the other of continuing the polymerization with the addition of the remaining monomer reactants at a temperature not above 60.degree. C. and at a pH in the range of from 1 to 7. The process is of use in producing improved thermosetting enamels.