42.
    发明专利
    未知

    公开(公告)号:DK179375A

    公开(公告)日:1975-10-28

    申请号:DK179375

    申请日:1975-04-24

    Applicant: BAYER AG

    Abstract: The present invention teaches a novel polyisocyanate lacquer binder and a method preparing it. The binder is prepared by reacing uretidione containing polyisocyanates optionally mixed with uretdione free diisocyanates with water or with low molecular weight compounds which have two alcoholic hyroxyl groups per molecule. Optionally these compounds may be mixed with up to 60 wt.% based on the total weight of hydroxyl bearing compounds, of low molecular weight compounds with one active alcoholic hydroxyl group per molecule. The proportion of reactants is so selected that the binder produces has from 5 to 20 wt.% of latent isocyanate groups in the form of unopened uretdione rings. The binder can then be mixed with polyhydroxyl compounds having molecular weights of 400 to 10,000 and conventional lacquer pigments and fillers. This mixture can then be coated on a substrate and the coating heated to above 110 DEG C to effect hardening.

    45.
    发明专利
    未知

    公开(公告)号:SE7407478L

    公开(公告)日:1974-12-09

    申请号:SE7407478

    申请日:1974-06-06

    Applicant: BAYER AG

    Abstract: Organic polyisocyanates which are a reaction product of an excess of an organic polyisocyanate and hydrocyanic acid have the formula O PARALLEL C OCN-R ANGLE R-NCO ¦¦ N N ¦¦ C----C PARALLEL PARALLEL ONX in which R represents an aliphatic C2 to C12 cycloaliphatic C4 to C15, aromatic C6 to C15 or araliphatic C7 to C15 hydrocarbon radical, and X represents hydrogen or a group of the formula -C-NH-R- NCO PARALLEL O wherein R has the same meaning as above.

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