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:
Oct. 26, 1982
Filed:
Oct. 07, 1980
Applicant:
Inventors:
Ted Brink, Arnhem, NL;
Stephanus A de Graaf, Renkum, NL;
Assignee:
Akzo NV, Arnhem, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
524397 ; 525165 ;
Abstract
The flame retardancy of a polyethylene terephthalate ester molding composition is improved by mixing therewith both a salt of oxalic acid and polytetrafluoroethylene having a number average molecular weight Mn of more than 10.sup.5. The oxalic acid salt has the formula K.sub.3 [Al(C.sub.2 O.sub.4).sub.3 ], K.sub.2 [Mg(C.sub.2 O.sub.4).sub.2 ] or Rb.sub.3 [Al(C.sub.2 O.sub.4).sub.3 ]. The preferred composition contains from 5-15% by weight of the oxalic acid salt and 0.1-0.5% by weight of polytetrafluoroethylene. The composition having improved flame retardancy may be used to advantage for making shaped articles by injection molding.