PROCESS FOR THE MANUFACTURE OF POSSIBLY CELLULAR POLYURETHANE ELASTOMERS

    公开(公告)号:DE3274115D1

    公开(公告)日:1986-12-11

    申请号:DE3274115

    申请日:1982-06-25

    Applicant: BASF AG

    Abstract: A process for the preparation of optionally cellular and non-cellular polyurethane elastomers, preferably by reaction injection molding, organic polyisocyanates, polyether polyols based on polyoxyalkylene polyether polyols with terminal hydroxyethylene groups and an ethoxylation degree of 1 to 13, having a content of primary hydroxyl groups at the corresponding degree of ethoxylation as the value of curve A to 100 percent with curve A describing the dependency of the primary hydroxyl group content upon the degree of ethoxylation are reacted with chain extenders and/or cross-linking agents in the presence of catalysts as well as optionally blowing agents, auxiliaries and additives.

    29.
    发明专利
    未知

    公开(公告)号:DE3315382A1

    公开(公告)日:1984-10-31

    申请号:DE3315382

    申请日:1983-04-28

    Applicant: BASF AG

    Abstract: 1. A process for preparing an elastic, compact or cellular polyurethane by reacting a) an organic polyisocyanate with b) an organic polyhydroxy compound in the presence of c) a catalyst and optionally d) a chain extending or crosslinking agent, e) a blowing agent, f) an assistand and/or an additive, wherein polyhydroxy compound b) comprises to an extent not less than 30% by weight, based on total component b), a di-, tri- or tetrafunctional polyether polyester polyol having a hydroxyl number of from 10 to 200 and having been prepared by esterification of i) a di-, tri- or tetrafunctional polyetherol having a hydroxyl number of from 15 to 250 with a carboxylic anhydride in the presence of N-methylimidazole and/or triethylenediamine as a catalyst to give a carboxylic monoester and subsequent ii) alkoxylation of the carboxylic monoester with an alkylene oxide in the presence of a mixture of N-methylimidazole and/or triethylenediamine and triphenylphosphine and/or a thiodialkylene glycol as a catalyst, the amount of catalyst being from 0.05 to 2.0 parts by weight, based on 100 parts by weight of the mixture of polyol and carboxylic anhydride or on 100 parts by weight of carboxylic monoester.

    30.
    发明专利
    未知

    公开(公告)号:DE3315381A1

    公开(公告)日:1984-10-31

    申请号:DE3315381

    申请日:1983-04-28

    Applicant: BASF AG

    Abstract: In order to prepare polyester or polyetherpolyester polyols, polyols, preferably di- to hexafunctional polyether polyols having hydroxyl numbers from 15 to 250 are esterified with at least one carboxylic acid anhydride, preferably phthalic acid anhydride, in the presence of N-methylimidazole, triethylenediamine, and/or triphenylphosphine as catalysts to form a carboxylic acid half-ester, and said half-ester is then oxyalkylated with at least one alkylene oxide, preferably ethylene oxide, in the presence of N-methylimidazole, triethylenediamine, triphenylphosphine, thiodialkylene glycol, employing a mixture of at least two of the compounds cited as catalysts.

Patent Agency Ranking