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    Chlorinating powdered vinyl chloride polymers
    4.
    发明授权
    Chlorinating powdered vinyl chloride polymers 失效
    氯化聚氯乙烯聚合物

    公开(公告)号：US3663392A

    公开(公告)日：1972-05-16

    申请号：US3663392D

    申请日：1970-06-18

    Applicant: BASF AG

    Inventor： ZEITLER GERHARD ,  TRIESCHMANN HANS-GEORG

    IPC: C08F8/20 ,  C08F27/02

    CPC classification number: C08F8/20 ,  C08F14/00 ,  C08F246/00

    Abstract: A process for the chlorination of vinyl chloride polymers in which a powdered vinyl chloride polymer is treated in a first stage with gaseous chlorine at below the softening point and under the action of light followed by a second stage in which it is treated at above the softening point while excluding light. The products are homogeneously chlorinated and have a high thermostability; they may be used as special glasses and for hot water pipes.

    Abstract translation: 氯乙烯聚合物的氯化方法，其中粉末状氯乙烯聚合物在第一阶段用气态氯处于低于软化点并在光的作用下处理第二阶段，其中它在高于软化处理 同时排除光。

    Hard emulsifiable and odourless synthetic waxes and a process for their production
    10.
    发明专利
    Hard emulsifiable and odourless synthetic waxes and a process for their production 未知

    公开(公告)号：GB981586A

    公开(公告)日：1965-01-27

    申请号：GB1925463

    申请日：1963-05-15

    Applicant: BASF AG

    Inventor： ZEITLER GERHARD ,  HANSEN KARL-FRIEDRICH

    IPC: C08F8/00 ,  C08F8/50 ,  G01N21/90 ,  G01N33/00

    Abstract: In a process for the production of hard, emulsifiable, odourless, synthetic waxes, a polyolefine having a molecular weight between 1,800 and 10,000 (obtained by thermal degradation of a polyolefine having a molecular weight of more than 10,000) is reacted, while excluding atmospheric oxygen and at 180 DEG to 300 DEG C., with 0.5 to 5% by weight, based on the amount of polyolefine, of an unsaturated aliphatic carboxylic acid or anhydride. In a modification of the process, a polyolefine having a molecular weight of more than 10,000 is thermally degraded, at 200 DEG to 500 DEG C., into a product having a molecular weight between 1,800 and 10,000 and at the same time is reacted with an unsaturated aliphatic carboxylic acid or anhydride under, otherwise, the same conditions as specified above. There may be coemployed, with said unsaturated acid or anhydride, 0.2 to 1% by weight, based on the amount of polyolefine, of a monoester or diester, where existent, of said unsaturated acid, e.g. diethyl maleate. The polyolefines may be homopolymers or copolymers, and also copolymers of mono-olefines with carbon monoxide; isotactic polypropylene and high and low pressure polyethylene are exemplified. The unsaturated carboxylic compounds specified are maleic acid, fumaric acid, aconitic acid, citraconic acid, acrylic acid and crotonic acid, and their anhydrides, where existent. The process of the invention may be carried out under nitrogen and at atmospheric or raised pressure. The carboxylic reactant(s) may be added in small portions during the course of the reaction. The polyolefine degradation can be carried out batchwise or continuously. Specification 885,969 is referred to.

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