GB1117955A - Liquid surface coating compositions - Google Patents

Abstract

Coating compositions comprising a natural or synthetic polymeric film-forming agent and a liquid vehicle contain at least one fire-retardant compound Ar(Br)m(Cl)nR or Ar(Br)m(Cl)nOR1 where Ar is an aryl residue, m \sF 1, n \sF 0, R is hydrogen, alkyl or alkenyl, halogenated alkyl or alkenyl, aralkyl, or halogenated aralkyl, and R1 is not hydrogen but otherwise is chosen from the same alternatives as R, there being at least 2 nuclear bromine atoms per molecule, and the total fire-retardant providing a bromine content of at least 0.5% by weight relative to the film forming resin. Specified fire-retardants are tetrabromobenzene, pentabromo-, tribromo- and chlorodibromo-toluene, dibromo- and 2:4-dibromo-1-methyl naphthalene, 1:5-dibromoanthracene, pentabromophenyl ethyl-, n-propyl-, or allyl ether, tribromophenyl allyl ether, chlorodibromophenyl allyl ether, and 3,5-dibromo-2,4,6-trichlorophenyl allyl ether. Specified film-formers include alkyd and polyurethane resins, ethyl cellulose and emulsion resins, for example a long oil linseed pentaerythritol alkyd resin (Examples 1-9), or a polyvinyl acetate emulsion (Examples 10-20). Auxiliary fire-retardants such as Bi, As or Sb oxide or sulphide or an organic antimonate may be present, especially antimony oxide in a weight ratio to the bromine compound of 1.25-2.6:1. The alkyd resin paint of Examples 1-9 also contained TiO2, white spirit, lead naphthenate and methyl ethyl ketoxime. The polyvinyl acetate emulsion paint of Examples 10-20 contained TiO2, dolomite, talc, and suspending and dispersing agents. The ethyl cellulose paint of Example 21 contained TiO2, tritolyl phosphate, a modified pentaerythritol rosin ester, toluene, isopropanol, butyl acetate, n-butanol and butyl oxitol. The polyurethane paint of Example 22 contained TiO2, "Irgalite" yellow 10 G (Registered Trade Mark), cyclohexanone, butyl acetate and a polyester.ALSO:Coating compositions comprising a natural or synthetic polymeric film-forming agent and a liquid vehicle contain at least one fire-retardant compound Ar(Br)m(Cl)nR or Ar(Br)m(Cl)nOR1, where Ar is an aryl residue, m \sF 1, n \sF 0, R is hydrogen, alkyl or alkenyl, halogenated alkyl or alkenyl, aralkyl or halogenated aralkyl and R1 is not hydrogen but otherwise is chosen from the same alternatives as R, there being at least 2 nuclear bromine atoms per molecule of the compound, the total fire-retardant providing a bromine content of at least 0.5% by weight relative to the film-forming resin. Specified fire-retardants are tetrabromobenzene, penta-bromo -, tribromo -, and chlorodibromo-toluene, dibromo -, and 2:4 - dibromo - 1 - methyl naphthalene, 1:5-dibromoanthracene, pentabromophenyl ethyl -, n - propyl -, or allyl ether, tribromophenyl allyl ether, chloro-dibromophenyl allyl ether, and 3,5-dibromo-2,4, 6-trichloro phenyl allyl ether. Shellac, copal, gum dammar and rubber are specified film-formers. Auxiliary fire-retardants such as bismuth, arsenic or antimony oxide or sulphide or an organic antimonate may be present, especially antimony oxide in a weight ratio to the bromine compound of 1.25-2.6:1. All the examples relate to synthetic resin compositions.