GB1003306A - Alkyds and polyurethanes derived from adducts of hexahalocyclopentadienes - Google Patents

Abstract

Alkyl resins based on hexahalocyclopentadiene adducts and having acid numbers of 20-90 have their viscosities reduced by reacting them with sufficient of a mono-epoxide to produce alkyd resins with acid numbers below 20. The alkyds resins may be the reaction products of (a) an adduct of a hexahalocyclopentadiene and an unsaturated polycarboxylic compound with a polyhydric alcohol at least part of which is an alcohol with at least 3 hydroxyl groups or (b) an adduct of a hexahalocyclopentadiene and an unsaturated polyhydric alcohol with a polycarboxylic compound and a polyhydric alcohol at least part of which is an alcohol with at least three hydroxyl groups or (c) an adduct of a hexahalocyclopentadiene and an unsaturated polyhydric alcohol with a polycarboxylic compound having at least three carboxyl groups. The halogen may be fluorine, chlorine or bromine. The polyhydric alcohols and polycarboxylic compounds which are reacted with the adducts may be aliphatic, cycloaliphatic, aromatic or heterocyclic and may be saturated or unsaturated. The polyhydric alcohols may contain hetero oxygen or sulphur atoms and may be substituted by halogen atoms or ester groups. The polycarboxylic compound may also be halogen-substituted. The mono-epoxide may be ethylene oxide, propylene oxide, butylene oxides, isobutylene oxides, decylene oxides, 2 : 3 - epoxyhexane, 3 - ethyl - 2 : 3 - epoxyoctane, cyclohexene oxide, styrene oxide, epichlorohydrin, epibromohydrin, glycidol, allyl glycidyl ether, methyl glycidyl ether, phenyl glycidyl ether, butyl glycidyl sulphide, glycidyl methyl sulphone, glycidyl acrylate, glycidyl methacrylate, glycidyl benzoate, glycidyl acetate, glycidyl sorbate, glycidyl allyl phthalate, phenyl-(p-octadecyloxybenzoyl) ethylene oxide, triphenyl glycidyl silane, <FORM:1003306/C3/1> or <FORM:1003306/C3/2> Fire-retardant polyurethane resins and foams are made by reacting the above alkyds with polyisocyanates or polyisothiocyanates or reaction product therewith and (1) polycarboxylic compounds, (2) polyhydric alcohols, (3) hydroxylated polyesters, (4) hydroxylated polyethers derived from mono-epoxides and polycarboxylic compounds, polyhydric alcohols or polyhydric phenols (including phenol-formaldehyde condensates) or (5) reactions products of epoxides and certain phosphorus compounds are disclosed in Specification 984,474. The usual catalysts may be used, e.g. tertiary amines, antimony compounds or tin compounds. The alkyds may also be foamed in admixture with the substances defined under (3), (4) and (5). In making the foam, the foaming agent may be water, a fluorochlorocarbon, a tertiary alcohol (see Specification 873,975), a secondary alcohol, a glycol, a polycarboxylic acid or anhydride, dimethylol urea, polymethylol phenols, formic acid or tetrahydroxymethylphosphonium chloride. The foam-forming mixture may also include a silicone emulsifier and glycerol. Specification 873,974 also is referred to.