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:
Dec. 24, 1985
Filed:
May. 02, 1985
Applicant:
Inventor:
James M Harrison, Fort Worth, TX (US);
Assignee:
Texstyrene Plastics, Inc., Fort Worth, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521 60 ; 521 56 ; 521146 ;
Abstract
A method of impregnating polystyrene beads with an aliphatic hydrocarbon, rendering it into expandable polystyrene. The method involves the use of an improved impregnating solution or bath. The solution includes water, an expanding agent, the polystyrene beads and soaps which act as anti-agglomeration agents. The beads are maintained in the solution for a selected time period and at a temperature and pressure suitable to permit the expanding agent to impregnate the beads. The beads are then separated from the solution and, after drying, they are ready for use, no further processing being required.