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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.:

US 4244857 B1

PDFFull Text
Date of Patent:
Jan. 13, 1981

Filed:

Aug. 30, 1979

Curing agent for polyepoxides and epoxy resins and composites cured

Applicant:
Inventors:

Tito T Serafini, Middleburg Hts., OH (US);

Peter Delvigs, Fairview Park, OH (US);

Raymond D Vannucci, Brooklyn, OH (US);

Assignee:

The United States of America as represented by the Administrator of the, , US;

Attorneys:

Musial; Norman T.

Manning; John R.

Mackin; James A.

Primary Examiner:

V P Hoke

Int. Cl.
CPC ...
C08K / ; C08G / ; C07D / ;
U.S. Cl.
CPC ...
260 / ; 2603 / ; 2603 / ; 528117 ; 528118 ; 528322 ;
Abstract

A curing agent for a polyepoxide has the formula: ##STR1## wherein R.sub.1 is a divalent aryl radical such as phenylene and wherein R.sub.2 is a tetravalent aryl radical such as a tetravalent benzene radical. An epoxide is cured by admixture with the curing agent. The cured epoxy product retains the usual properties of cured epoxides and, in addition, has a high char residue after burning, on the order of 45% by weight. The high char residue is of value in preventing release to the atmosphere of carbon fibers from carbon fiber-epoxy resin composites in the event of burning of the composite.

Find Patent Forward Citations

Serafini, Tito. (1981). Curing agent for polyepoxides and epoxy resins and composites cured (U.S. Patent No. 4244857). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4244857

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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