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. 08, 1979
Filed:
May. 18, 1978
Applicant:
Inventor:
William J Bracke, Hamme, BE;
Assignee:
Labofina S. A., Brussels, BE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08V / ;
U.S. Cl.
CPC ...
521 60 ; 521 56 ; 521 57 ; 521 88 ; 521905 ; 521911 ;
Abstract
Disclosed is a process for producing expandable beads of vinyl aromatic polymer resin which provide cellular materials having a smaller and more uniform cell size, comprising the steps of suspension polymerizing beads of the vinyl aromatic polymer resin, and impregnating the beads while in suspension with a liquid blowing agent in the presence of an emulsifier comprising a diethanolamide of a fatty acid containing from 12 to 20 carbon atoms, and having a hydrophilic-lipophilic balance lower than 15.