Flameproofing substrate

US4252857A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Heinrich Heine · Krefeld, DE
• Gerhard Winter · Dossenheim, DE
• Hans-Dieter Block · Cologne, DE

Key dates

• Filing date: Aug 10, 1979
• Grant date: Feb 24, 1981
• Expiry date: Aug 10, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/921
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Steel, wood and other structural elements and substrates are flameproofed by being coated with a composition comprising at least one metal salt of a phosphonocarboxylic or phosphonophosphonic acid of the formula ##STR1## in which R.sub.1 =a carboxy group, a phosphono group, an alkyl, alkoxy or alkylamino radical optionally substituted one or more times by oxygen and/or nitrogen and containing at least one substituent from the group comprising the substitutents --COOH and --PO.sub.3 H.sub.2, the alkyl group containing from 1 to 12 carbon atoms, preferably from 1 to 4 carbon atoms, and the sum of the number of carboxyl and phosphono groups being from 1 to 8, preferably from 1 to 4; or a hydroxyalkyl or aminoalkyl radical containing from 1 to 12 and preferably from 1 to 4 carbon atoms, PA0 R.sub.2 =hydrogen, chlorine, bromine, an alkyl radical with 1 to 12 carbon atoms, preferably with 1 to 4 carbon atoms; a hydroxyl, amino, acylamino such as C.sub.1-4 -alkanoylamino, ureido, carbamoyl, phenyl, carboxyl or phosphono group, PA0 R.sub.3 =hydrogen, chlorine, bromine, an alkyl radical with 1 to 12 carbon atoms, preferably with 1 to 4 carbon atoms, a phenyl radical or the groups mentioned …