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. 28, 1978
Filed:
Oct. 07, 1976
Seiji Endo, Otsu, JP;
Takao Kashihara, Otsu, JP;
Akitada Osako, Otsu, JP;
Tatsuhiko Shizuki, Otsu, JP;
Tadashi Ikegami, Otsu, JP;
Toyo Boseki Kabushiki Kaisha, , JP;
Abstract
The present invention relates to a phosphorus-containing compound of the formula ##STR1## wherein each of R.sup.1 is a hydrogen atom or hydrocarbon group having 1-10 carbon atoms which may contain a hydroxyl group, and both R.sup.1 's may together form a dehydrated ring when both of R.sup.1 's represent hydrogen atoms, each of R.sup.2 and R.sup.3 is a member selected from the group consisting of halogen atoms and hydrocarbon groups having 1-10 carbon atoms, and each of n2 and n3 is an integer of 0-4. These compounds are especially useful for incorporation into polymers, such as polyesters, as flame-retardants. Further, such phosphorus-containing compound imparts excellent flame-retardant properties to such polyesters, while at the same time does not deleteriously affect the physical properties of the polyester.