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:
Jun. 12, 2001
Filed:
Jul. 06, 1999
Applicant:
Inventors:
Francis Peter Petrocelli, Blandon, PA (US);
Cajetan Francis Cordeiro, Kutztown, PA (US);
Assignee:
Air Products Polymers, L.P., Allentown, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F 2/24 ; C08F / ;
U.S. Cl.
CPC ...
C08F 2/24 ; C08F / ;
Abstract
A continuous emulsion polymerization process consisting of multiple stirred-tanks in series is used to produce a broad particle-size distribution for vinyl acetate-based emulsions utilizing polyvinyl alcohol as a protective colloid. When low-molecular-weight grades of PVOH and a continuous process are employed, a high-solids emulsion can be produced. This process eliminates the need for a co-surfactant, which is required to make similar high-solids emulsions via a batch process.