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:
May. 31, 2005
Filed:
Oct. 17, 2001
Morris Christopher Wills, Philadelphia, PA (US);
Karen Casey, Harleysville, PA (US);
Chuen-shyong Chou, Ambler, PA (US);
Joseph Robert Adamo, Souderton, PA (US);
Fanwen Zeng, Belle Mead, NJ (US);
Morris Christopher Wills, Philadelphia, PA (US);
Karen Casey, Harleysville, PA (US);
Chuen-Shyong Chou, Ambler, PA (US);
Joseph Robert Adamo, Souderton, PA (US);
Fanwen Zeng, Belle Mead, NJ (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
Processes for preparing a powdery high rubber impact modifier containing two or more populations of polymer particles having a total rubbery weight fraction of greater than 90 weight percent is provided. Also provided are various methods of preparing aqueous polymer particle dispersions having two or more populations of polymer particles having a total rubbery weight fraction of greater than 90 weight percent. These dispersions are spray-driable into a powder and are useful for increasing the impact strength of various matrix resins.