101.
    发明专利
    未知

    公开(公告)号:DE3861814D1

    公开(公告)日:1991-04-04

    申请号:DE3861814

    申请日:1988-04-27

    Applicant: BASF AG

    Abstract: The invention relates to novel alkoxy substituted maleimides of the formula I where R1 is hydrogen, C1-C8-alkyl, C2-C8-alkenyl, phenyl or phenylalkyl, and the organic radicals may furthermore carry inert substituents, and R2 and R3 are each C1-C4-alkyl, C2-C4-alkenyl, C1-C4-haloalkyl or C2-C4-haloalkenyl, and alkoxy-substituted maleic anhydrides of the formula II II where R2 is C1-C4-alkyl, C2-C4-alkenyl, C1-C4-haloalkyl or C2-C4-haloalkenyl and Z is hydrogen, halogen or a radical OR3, where R3 is C1-C4-alkyl, C2-C4-alkenyl, C1-C4-haloalkyl or C2-C4-haloalkenyl. The invention further relates to processes for preparing such maleimides I and the corresponding maleic anhydrides II and their use as graft monomers in graft polymers based on polyphenylene ethers.

    102.
    发明专利
    未知

    公开(公告)号:DE3861154D1

    公开(公告)日:1991-01-10

    申请号:DE3861154

    申请日:1988-03-23

    Applicant: BASF AG

    Abstract: A process for the preparation of esters of tetrahydropyran-4-carboxylic acid of the general formula I, where R1 is an alkyl, cycloalkyl, or aryl group, by treating butyrolactones of the general formula II, where R2 is a hydrogen atom, an alkyl group, or an acyl group -CO-R3, R3 being a hydrogen atom or an alkyl group with from 1 to 6 carbon atoms, with alcohols of the general formula III at temperatures of from 150 DEG C. to 400 DEG C. in the presence of acid catalysts.

Patent Agency Ranking