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:
Jun. 08, 1976
Filed:
Jan. 20, 1975
Sumitomo Chemical Company, Limited, Osaka, JA;
Hayashibara Biochemical Laboratories, Incorporated, BOTH OF, JA;
Abstract
A molded foam can be easily obtained by blending pullulan, modified pullulan or a mixture thereof with a foaming agent capable of yielding a gas at below the decomposition temperature thereof, and, if necessary, with a plasticizer or softener, and then molding the resulting mixture according to a conventional thermoplastic resin-molding process at a temperature at which the said pullulan, modified pullulan or mixture thereof is in a plastified state, and at a temperature above the gas-yielding temperature of said foaming agent and below the decomposition temperature of said pullulan, modified pullulan or mixture thereof. The molded foam thus obtained is not only well comparable in mechanical, chemical and physical properties to molded foams composed of conventional thermoplastic synthetic resins, but also has such excellent characteristics that it can spontaneously be decomposed on standing outdoors, and hence can be easily discarded without any such fear as to cause environmental pollution.