| 摘要 |
<p>1,248,063. Unsaturated cross-linked polyesters. HOOKER CHEMICAL CORP. 28 Nov., 1968 [28 Dec., 1967], No. 56442/68. Headings C3P and C3R. A polymerizable polyester has the ingredients: (1) an adduct of a polyhalogenated cyclopentadiene and a polycarboxylic compound containing aliphatic carbon-carbon unsaturation, (2) a polycarboxylic compound containing aliphatic carbon-carbon unsaturation, (3) a dimer acid, (4) 2,2,4-trimethyl-1,3-pentane diol. The polyester is produced by reacting the ingredients in an inert atmosphere, at 145‹ to 170‹ C. Many adducts (1) are listed, the preferred one being chlorendic acid which preferably comprises 0À05 to 0À35 mole fraction of the polyester. Reactants (2) specified are maleic, fumaric, citraconic, chloromaleic, mesaconic, pyrocinchonic, acetylene dicarboxylic, aconitic and itaconic acids and the anhydrides and halides of these, the preferred one being fumaric acid, this comprising 0À1 to 0À4 mole fraction of the polyester. Reactant (3) is preferably a dimerized C 18 unsaturated fatty acid, comprising 0À01 to 0À20 mole fraction of the polyester. Reactant (4) preferably comprises 0À45 to 0À60 mole fraction of the polyester. The reaction mixture may also include other dicarboxylic acids or other diols. The unsaturated polyester prepared as above, is cross-linked by polymerizing it with unsaturated monomers such as styrene, diallylphthalate, diallylisophthalate, triallylcyanurate, acrylic acid, methacrylic acid, methylmethacrylate, vinyltoluene, chlorostyrene and methyl styrene, in the presence of conventional inhibitors and peroxide initiators and, optionally, metallic or metal salt promoters or fillers. The preferred monomer is styrene, which is used in the examples.</p> |
