| 摘要 |
1,179,451. Graft polymer composition. KUREHA KAGAKU KOGYO K.K. 23 March, 1967 [26 March, 1966], No. 13645/67. Heading C3G. A copolymer composition comprises (A) a copolymer of 60 to 95 parts of vinylidene chloride with 40 to 5 parts of another monomer, (B) a composition prepared by adding 20 to 50 parts of one or more monomers (b) selected from styrene, alpha-methyl styrene, vinylidene chloride, acrylonitrile, methacrylonitrile, C 1 -C 4 - alkyl esters of acrylic or methacrylic acid and 2,3-dichlorobutadiene, and 0À01 to 5 parts per 100 parts of monomers (b) of a divinyl or divinylidene cross-linking agent (c) to a latex containing 80 to 50 parts of a rubber (a) based on a 1,3-conjugated diene and polymerizing the mixture and (C) a stabilizer and/or plasticizer for copolymer (A), there being 5 to 30 parts of (B) and 0À01 to 15 parts of (C) per 100 parts of (A), all parts being by weight. Suitable crosslinking agents are divinyl benzene, mono-, di-, tri- or tetra-ethylene glycol dimethacrylates and 1,3-butylene glycol dimethacrylate. In Example 1, styrene, methyl methacrylate and triethylene glycol dimethacrylate are grafted on to a butadiene-styrene-triethylene glycol dimethacrylate copolymer latex and in Examples 2 and 6 the dimethacrylate of Example 1 is replaced by divinyl benzene. The graft monomer mixture in Example 3 contains no styrene and the rubber in Example 4 contains no dimethacrylate. A chloroprene/2,3-dichlorobutadiene/divinyl benzene rubber is grafted in Example 5 with methyl methacrylate, styrene and divinyl benzene and in Example 9 with 2, 3,-dichlorobutadiene and divinyl benzene. In Example 7, acrylonitrile replaces the styrene of Example 5. Methyl methacrylate vinylidene chloride and divinyl benzene are grafted in Example 8 on to a butadiene - vinylidene chloride rubber. The polymers are blended with a vinylidene chloridevinyl chloride copolymer, acetyl tributyl citrate and epoxidated soybean oil, or a silicate filler. |
