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12 条记录 (耗时 0.014 秒)

    Polyoxymethylene polymers having reduced melt indices
    1.
    发明授权
    Polyoxymethylene polymers having reduced melt indices 失效
    具有减少熔融指数的聚甲基乙烯聚合物

    公开(公告)号：US3627850A

    公开(公告)日：1971-12-14

    申请号：US3627850D

    申请日：1970-02-09

    申请人： HOECHST AG

    发明人： HAFNER KARL-HEINZ ,  FISCHER EDGAR

    IPC分类号： C07C17/25 ,  C08G2/00 ,  C08L59/00 ,  C08L59/02 ,  C08G37/04

    CPC分类号： C08G4/00 ,  C08G2/06 ,  C08G2/22 ,  C08L59/00 ,  C08L59/02 ,  C08L59/04 ,  C08L2666/16

    摘要： The melt indices of polyformaldehyde having stabilized terminal groups or copolymers of formaldehyde or trioxane with cyclic ethers are reduced by adding a copolymer of trioxane containing carboxylate groups. The carboxylate-containing polymers may be prepared by copolymerizing trioxane and optionally cyclic ethers with p-glycidyl benzoic acid esters and then saponifying the esters groups. The metal of the carboxylate group is selected from metals of the first two groups of the Periodic Table. By incorporating from 1 to 50 percent by weight of the carboxylatecontaining polymers in conventional polyoxymethylene polymers, the melt indices thereof are substantially reduced.

    Formaldehyde polymers stabilized with tris(dialkylhydroxybenzyl)benzenes
    7.
    发明授权
    Formaldehyde polymers stabilized with tris(dialkylhydroxybenzyl)benzenes 失效
    稳定于TRIS（二甲基苯甲酸）苯甲酸的甲醛聚合物

    公开(公告)号：US3424819A

    公开(公告)日：1969-01-28

    申请号：US3424819D

    申请日：1965-08-26

    申请人： TENNECO CHEM

    发明人： GREEN RICHARD

    IPC分类号： C08K5/13 ,  C08G51/60 ,  C08G37/04 ,  C08G51/54

    CPC分类号： C08K5/13 ,  C08K5/16 ,  C08K5/34 ,  C08L59/02 ,  C08L77/02 ,  C08L77/06

    摘要： 1,127,467. Stabilized oxymethylene polymers. TENNECO CHEMICALS Inc. 25 Aug., 1966 [26 Aug., 1965], No. 38276/66. Heading C3P. Compositions comprise (1) a polymer of formaldehyde or trioxan, (2) a stabilizer of the formula where R, R 1 are alkyl radicals having 1 to 8 carbon atoms, and optionally (3) a superpolyamide, cyanoguanidine, substituted cyanoguanidine, polyaminotriazole, amino - substituted-s-triazine, imidazoline or a mixture thereof. The polymers (1) have a molecular weight of 10,000 to 200,000 and a melting-point of above 150‹ C., while the components (2) and (3) are suitably used in amounts of 0À1 to 30% and 0À01 to 50% respectively, based on the polymer (1). The examples use the following polymers: (Example 1) an acetylated polyoxymethylene and (Examples 2 and 3), a trioxan-dioxolan copolymer having an inherent viscosity of 1À8. Exemplified component (2) is 1,3,5-trimethyl- 2,4,6 - tris 13,5 - di - t. - butyl - 4 - hydroxy - benzyl) benzene. Exemplified component (3) is a terpolymeric superpolyamide having 38% polycaprolactam, 35% polyhexamethylene adipamide, and 27% polyhexamethylene sebacamide.

    Thermoplastic moulding composition on the basis of polyoxymethylene
    8.
    发明授权
    Thermoplastic moulding composition on the basis of polyoxymethylene 失效
    基于聚甲醛的热塑性成型组合物

    公开(公告)号：US3872182A

    公开(公告)日：1975-03-18

    申请号：US33281073

    申请日：1973-02-16

    申请人： HOECHST AG

    发明人： SEXTRO GUNTER ,  BURG KARLHEINZ ,  KERN RUDOLF ,  SCHMIDT HEINZ ,  WOLTERS ERNST

    IPC分类号： C08L59/00 ,  C08L59/02 ,  C08G37/04

    CPC分类号： C08L59/02 ,  C08L59/00 ,  C08L2666/24

    摘要： A thermoplastic molding composition is composed of a linear poly(oxymethylene) and a graft copolymer the side chains of which consist essentially of oxymethylene groups. The said graft copolymer acts as a nucleating agent; its effectiveness is dependent on its amount, molecular weight and degree of grafting. Molded articles made of said composition show improved mechanical properties.

    摘要翻译： 热塑性模塑组合物由线性聚（甲醛）和其侧链主要由氧亚甲基组成的接枝共聚物组成。 所述接枝共聚物用作成核剂; 其有效性取决于其量，分子量和接枝度。 由所述组合物制成的模制品显示改进的机械性能。

    Stabilized formaldehyde polymers
    9.
    发明授权
    Stabilized formaldehyde polymers 失效
    稳定的甲醛聚合物

    公开(公告)号：US3692876A

    公开(公告)日：1972-09-19

    申请号：US3692876D

    申请日：1971-02-24

    申请人： SIR SOC ITALIANA RESINE SPA

    发明人： ACKERMANN JACOB ,  RADICI PIERINO ,  FERRE FRANCO

    IPC分类号： C08L59/00 ,  C08L59/02 ,  C08L79/00 ,  C08G37/04 ,  C08G51/60

    CPC分类号： C08L59/02 ,  C08L59/00 ,  C08L79/00 ,  C08L2666/20

    摘要： Formaldehyde polymers and copolymers are stabilized by incorporating 0.05 to 10 percent by weight of a complex obtained in the form of a precipitate by contacting, in a solvent or solvent mixture, an antioxidant of the phenolic type which has an acidic character and polyvinyl pyrrolidone. A composition of matter comprising said formaldehyde and said stabilizer is also claimed.

    摘要翻译： 通过在溶剂或溶剂混合物中与具有酸性特征的酚醛类型的抗氧化剂和聚乙烯吡咯烷酮接触，通过加入0.05至10重量％的以沉淀物形式获得的络合物来稳定甲醛聚合物和共聚物。 还要求保护包含所述甲醛和所述稳定剂的物质组合物。