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:
Mar. 20, 1979
Filed:
May. 24, 1977
Toray Industries, Inc., Tokyo, JP;
Abstract
Disclosed is a highly flame-retardant fiber of excellent color-fastness which is made from the mixture composition of 30 to 60 parts of an amino resin composed of a condensation product of formaldehyde with melamine and other amino compounds selected from, urea, dicyandiamide and benzoguanamine, and 70 to 40 parts of polyvinyl alcohol. The incorporation of 0.1 to 4.0% by weight of phosphorus by the addition of a reactive organic phosphorous compound to the spinning dope or to the wet filaments before drawing causes noticeable enhancement of the flame-retardance. Curing and crosslinking may be carried out during the yarn-making process of spinning, drawing and heat-setting or after the yarn-making process by treatment in an acidic formaldehyde environment.