10.
    发明专利
    未知

    公开(公告)号:DE1645474A1

    公开(公告)日:1970-10-29

    申请号:DE1645474

    申请日:1966-10-31

    Applicant: STAMICARBON

    Abstract: 1,147,160. Moulded anionic lactam polymers. STAMICARBON N.V. 28 Oct., 1966 [3 Nov., 1965], No. 48530/66. Heading B5A. [Also in Division C3] A lactam is anionically polymerized at 175 to 210‹ C. using a catalyst but no promoter to obtain a liquid polymer which remains liquid when cooled to 140 to 170‹ C. and a promoter is then mixed with the cooled liquid polymer and the mixture is poured into a mould heated at 140‹ to 170‹ C. wherein it is further polymerized to a solid polymer. Various catalysts and promoters are mentioned. It is stated that the moulds may be made of material with which the monomer-catalyst mixture would be too reactive e.g. epoxy resins. Fillers or dyes may be mixed with the liquid polymer before moulding. In the examples caprolactam is polymerized using KOH as catalyst and dicaprolactam ether as promoter (1) in a cylindrical glass mould and (2) a two part disc-shaped brass mould.

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