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:
May. 10, 1977
Filed:
Jan. 17, 1975
Hans-Dieter Block, Cologne, DT;
Udo-Winfried Hendricks, Cologne, DT;
Klaus Walz, Bergisch-Neukirchen, DT;
Bayer Aktiengesellschaft, Leverkusen, DT;
Abstract
Dicarbamic acid diesters of the formula ##STR1## in which R represents C.sub.1 - C.sub.4 -alkylene which is optionally substituted by one or more halogen atoms, and R.sub.1 and R.sub.2 independently of one another represent C.sub.1 - C.sub.4 -alkyl which is optionally substituted by halogen atoms or together with the oxygen atoms and the phosphorus atom form a 5-membered to 7-membered heterocyclic structure, R.sub.3 is hydrogen, hydroxymethyl or C.sub.1 - C.sub.4 -alkoxymethyl and R.sub.4 represents a divalent radical, with at least 2 carbon atoms, which is free from hydroxyl groups, and of which the two bonds must start from different carbon atoms, and wherein the phosphorus content of the diester is more than 5 % by weight, are suitable as flameproofing agents for textile materials, paper and plastics.