PRODUCTION OF LOW-SHRINKAGE NYLON MOLDINGS

    公开(公告)号:CA1233588A

    公开(公告)日:1988-03-01

    申请号:CA431957

    申请日:1983-07-06

    Applicant: BASF AG

    Abstract: Low shrinkage nylon moldings are produced by activated alkaline lactam polymerization, preferably using the reactive injection molding technique, by a process wherein the polymerization is carried out in the presence of from 5 to 80% by weight of a polymer P which 1. is completely soluble in the lactam, 2. separates out in the course of polymerization at a conversion of from 1 to 50%, 3. is composed of one or more blocks which are compatible with polylactam and one or more blocks which are incompatible therewith, and preferably 4. possesses functional groups which are incorporated into the growing polylactam chain.

    PROCESS FOR THE PREPARATION OF OPTIONALLY CELLULAR POLYURETHANE POLYUREA MOLDED PARTS

    公开(公告)号:CA1226990A

    公开(公告)日:1987-09-15

    申请号:CA474433

    申请日:1985-02-15

    Applicant: BASF AG

    Abstract: PROCESS FOR THE PREPARATION OF OPTIONALLY CELLULAR POLYURETHANE-POLYUREA MOLDED PARTS The invention relates to a one-shot process for the preparation of cellular or noncellular polyurethane polyurea parts having a modulus of flexural elasticity greater than 600 N/mm2 and densities of from 0.8 to 1.2 g/cm3 using the reaction injection molding technique, by reacting organic polyisocyanates, a polyol component, aromatic diamines, additional chain extenders and/or cross-linking agents in the presence of catalysts and optionally blowing agents, auxiliaries and/or additives, wherein the polyol component is a mixture containing i) from 95 to 60 percent by weight of at least one compound selected from the group consisting of polyols, polyether polyamines, polyesteramides, and their mixtures having functionalities of from 2 to 6 and a molecular weight of from 1000 to 8000 and ii) from 5 to 40 percent by weight of a least one aromatic and/or aromatic-aliphatic polyester polyol having a functionality of from 2 to 3 and a molecular weight of from 254 to 700, wherein the percents by weight are based on the total weight of the polyol component.

    COPOLYAMIDES
    76.
    发明专利

    公开(公告)号:CA1076742A

    公开(公告)日:1980-04-29

    申请号:CA245730

    申请日:1976-02-13

    Applicant: BASF AG

    Abstract: Copolyamides which are manufactured using A) from 1 to 60 parts by weight of a cyclic lactam of 6 to 12 carbon atoms and/or an .omega.-aminocarboxylic acid of 6 to 20 carbon atoms and B) from 40 to 99 parts by weight of the salt of at least two different dicarboxylic acids of the general formula HOOC-R-COOH where R is an aliphatic and/or cycloaliphatic radical of 4 to 46 carbon atoms and/or terephthalic acid and/or isophthalic acid and/ or phenylenediacetic acid with (a) cycloaliphatic and/or aliphatic diamines of 4 to 20 carbon atoms, which possess at least one secondary amino group and (b) optionally, up to 0.3 equivalent of primary .alpha.,.omega. -diamines of 2 to 20 carbon atoms, are excellent hot-melt adhesives.

    78.
    发明专利
    未知

    公开(公告)号:DK1187865T3

    公开(公告)日:2006-01-30

    申请号:DK00929367

    申请日:2000-04-17

    Applicant: BASF AG

    Abstract: According to the inventive method, the polyurethane foams are produced by reacting isocyanates with compounds that react with isocyanates in the presence of foaming agents and optionally, catalysts, additives and/or auxiliary agents. The method is characterised in that the reaction is carried out in the presence of at least one of the following compounds (i): alpha , beta -unsaturated carboxylic acid, alpha , beta -unsaturated carboxylic acid derivative, alpha , beta -unsaturated ketone and or alpha , beta -unsaturated aldehyde.

Patent Agency Ranking