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:
Mar. 21, 1978
Filed:
Mar. 04, 1975
Applicant:
Inventors:
Assignee:
Sekisui Kaseihin Kogyo Kabushiki Kaisha, Osaka, JA;
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08J / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ; 260 / ; 260 / ;
Abstract
Expandable ethylenically unsaturated polymer particles are produced by using in the process a suspension stabilizer comprising calcium carbonate particles having the surfaces thereof treated with resin acid. The method for the production of such expandable ethylenically unsaturated polymer particles from ethylenically unsaturated polymer particles includes suspending such particles in water and impregnating the particles with an organic expanding agent having a boiling point lower than the softening point of the polymer particles.