Patent ID: 7144527

Claim:
A fire-protection coating material capable of forming an insulating layer comprising a compound or mixture of compounds selected from the group consisting of a phosphinic salt of the formula (I), a diphosphinic salt of the formula (II), a mixture of formula (I) and formula (II), a polymer of formula (I), a polymer of formula (II), and a mixture of polymers of formula (I) and formula (II), where R 1 , R 2 are identical or different and are C 1 –C 6 -alkyl, linear or branched and aryl; R 3 is C 1 –C 10 -alkylene, linear or branched, C 6 –C 10 -arylene, -alkylarylene, or -arylalkylene; M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K, or a protonated nitrogen base; m is from 1 to 4; n is from 1 to 4; x is from 1 to 4.