会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明专利
    • PRODUCTION OF CHLORINATED CO-TELOMERS
    • GB1242177A
    • 1971-08-11
    • GB1674169
    • 1969-03-31
    • PECHINEY SAINT GOBAIN
    • VOFSI DAVIDASSCHER MEIR
    • C08F214/06
    • 1,242,177. Telomers. PRODUITS CHIMIQUES PECHINEY-SAINT-GOBAIN. 31 March, 1969 [1 April, 1968], No. 16741/69. Heading C3P. [Also in Division C2] Telomers of vinyl chloride and vinylidene chloride or one or both of these with a non- chlorinated ethylenically-unsaturated monomer are prepared by reaction with carbon tetrachloride or chloroform in the presence of a bivalent or trivalent iron salt, or of a co-ordination complex of iron. Non-chlorinated monomers specified are acrylic and methacrylic acids, their salts and alkyl esters, acrylonitrile, acrylamide, fumaric and maleic acids and their salts and alkyl esters, maleic anhydride, styrene, butadiene and isoprene. Trivalent iron salts are preferably used in the presence of a reducing agent capable of converting them to divalent . iron compounds during the reaction, e.g. benzoin, acetaldehyde, isobutyraldehyde, benzaldehyde, stannous chloride, acetoin, ammonia or ammonium sulphite. Solubility of iron salts in the reaction mixture may be increased by addition of an alkyl-substituted ammonium chloride or bromide or lithium chloride or bromide. Co-solvents may be used. The products are used as softeners, plasticizers and flame-retardants for synthetic resins.