| 摘要 |
<p>1482091 Fire-retardant unsaturated polyesters HOOKER CHEMICALS & PLASTICS CORP 15 July 1974 [30 July 1973] 31180/74 Heading C3P A fire-retardant polymer composition comprises (i) an unsaturated polyester, (ii) a copolymerizable monomer, wherein said polyester contains, at least 4 weight per cent of halogen, based on (i) plus (ii), and (iii) as fire-retardant, 0À25 to 5 weight per cent, based on (i) plus (ii) of copper or a copper compound. In the examples the polyester resins consists of styrene solutions of (I) ethylene glycol and diethylene glycol esterified with 1,4,5,6,7,6-hexachlorobicyclo - (2.2.1) - 5 - heptene - 2,3 - dicarboxylic anhydride and maleic anhydride; (II) propylene glycol esterified with the anhydrides of (I); (III) propylene glycol esterified with fumaric acid and tetrachlorophthalic anhydride; (IV) the glycol mixture of (I) esterified with maleic anhydride tetrabromophthalic anhydride, phthalic anhydride and sodium acetate, (V) 1,2- dibromopropanol, ethyleneglycol and glycerol esterified with chlorendic acid and maleic anhydride; (VI) as (I) except that vinyl benzyl chloride is added; and the copper compounds used are cupric and cuprous oxide, cupric chloride and the dihydrate, anhydrous and hydrated cupric sulphate, metallic copper, curpous cyanide, cupric carbonate, cupric oxychloride, cupric chromate, cupric tungstate, cupric thiocyanate, cupric borate, cupric phosphate, and cupric bromide. The compositions may also comprise reinforcing agents, fillers and stabilizers.</p> |
