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:
Sep. 13, 2011
Filed:
May. 14, 2003
Bob Heinis, Amsterdam, NL;
Willem Karzijn, Amsterdam, NL;
Martien Krijger, Amsterdam, NL;
Martinus Johannes Maria Lelieveld, Amsterdam, NL;
Bob Heinis, Amsterdam, NL;
Willem Karzijn, Amsterdam, NL;
Martien Krijger, Amsterdam, NL;
Martinus Johannes Maria Lelieveld, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
The invention relates to a process for the batch or semi-batch preparation of a polymer polyol, which process involves (1) preparing a seed by polymerizing in a base polyol at least one ethylenically unsaturated monomer in the presence of a polymerization initiator and macromer, and in the presence of from 0.5 to 50% wt of polymer polyol heel, based on amount of polymer present in the heel compared with total amount of polymer formed, (2) adding additional ethylenically unsaturated monomer to the seed obtained in step (1) and optionally additional polyol, and (3) polymerizing the mixture obtained in step (2).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile