中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

3 records (took 0.021 seconds)

    Graft copolymers from olefinically unsaturated monomers and polycondensates and a process for their production
    2.
    发明专利
    Graft copolymers from olefinically unsaturated monomers and polycondensates and a process for their production 未知

    公开(公告)号：GB899567A

    公开(公告)日：1962-06-27

    申请号：GB47961

    申请日：1961-01-05

    Applicant: BASF AG

    Inventor： CRAUBNER HANS ,  HRUBESCH ADOLPH

    IPC: C08F283/00 ,  C08F283/04

    Abstract: Graft polymers are formed by a process in which a polycondensate containing -CONHgroups is nitrosated at some or all of the amide nitrogen atoms and the resulting N-nitrosopolycondensate is copolymerized with one or more olefinically unsaturated monomers, e.g. acrylic and methacrylic acids and their C1-C12 esters, nitriles and amides, styrene, methylstyrenes, divinylbenzene, isobutylene, vinyl esters with C2-C18 acids, vinyl and vinylidene chlorides, butadiene, chloroprene, isoprene, dimethylbutadiene, vinyl ethers of C1-C12 alcohols, vinyl sulphonic acids, and vinyl pyridine, imidazole, pyrrolidone and carbazole. Polycondensates speeified are polycaprolactam, condensates of hexamethylene diamine with adipic or sebacic acid, a condensate of sebacic acid with p,p1diamino-diphenylmethane, a polyurethane prepared from a mixture of hexamethylene diamine and 1,4-butanediol dichlorocarbonate, and also polyesteramides, polyureas and polythioureas. The polycondensates are nitrosated by treatment with nitrosating agents such as dinitrogen trioxide, nitrosyl chloride, nitrous acid or alkyl nitrites, the reaction being carried out with the polycondensate in powder form or in solution, dispersion or in swollen form. In one mode of operation the polycondensate is nitrosated whilst dissolved, swollen or dispersed in the olefincally unsaturated monomer, in which case graft polymerization occurs simultaneously if the temperature of the reaction is in excess of room temperature. The graft polymerization of the unsaturated monomer may be accelerated by means of catalysts such as alkali and alkaline earth hydroxides, alkali carbonates, amines, heavy metal salts, benzoyl peroxide and, when employing photochemical excitation of the reaction, azobisisobutyronitrile, anthracene or perchloromethyl mercaptan. The polymerization may be carried out in bulk, solution or dispersion. The examples describe the production of graft polymers from nitrosated polycondensates with: (1) and (2) vinyl acetate+ acrylic acid, (3) acrylonitrile, (4) acrylonitrile+ styrene, (5) acrylonitrile, (6) and (7) methyl methacrylate, (8) methyl methacrylate+vinyl acetate, (9) butyl acrylate+vinyl pyrrolidone, (10) styrene, (11) styrene+isoprene or isobutylene, (12) vinyl chloride+vinyl carbazole, (13) vinyl propionate+vinyl isobutyl ether and (15) styrene.

Patent Agency Ranking