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:
Nov. 30, 1976
Filed:
Apr. 21, 1976
Applicant:
Inventors:
Assignee:
Sekisui Kaseihin Kogyo Kabushiki Kaisha, Nara, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 264 51 ; 264 53 ; 526910 ; 260 / ; 260 / ;
Abstract
Expandable styrene polymer particle compositions containing (1) an expanding agent, which is volatilizable and does not dissolve or may slightly swell the styrene polymer particles, and having a boiling point lower than the softening point of the styrene polymer particles, and (2) a small amount of sulfur containing compound having the following general formula: ##EQU1## wherein R.sub.1 and R.sub.2 are the same or different higher alkyl groups having 12 - 18 carbon atoms and R.sub.3 and R.sub.4 are the same or different lower alkylene groups having 1 - 4 carbon atoms.