13.
    发明专利
    未知

    公开(公告)号:BRPI0413872A

    公开(公告)日:2006-10-24

    申请号:BRPI0413872

    申请日:2004-09-06

    Applicant: BASF AG

    Abstract: A description is given of an alkanol-free alkoxylate of the general formula (I) CnH2n+1O(A)x(B)yR (I) where R is C1-6 alkyl or benzyl A is ethyleneoxy B is C3-6 alkyleneoxy or mixtures thereof, it being possible for groups A and B to be in random distribution, in alternation or in the form of two or more blocks in any order, n is an integer in the range from 4 to 8 x is a number in the range from 0 to 25 y is a number in the range from 0 to 10 and x+y is at least 3.

    17.
    发明专利
    未知

    公开(公告)号:ID17993A

    公开(公告)日:1998-02-19

    申请号:ID962699

    申请日:1996-09-24

    Applicant: BASF AG

    Abstract: A process for the prodn. of (1-4C alkyl) (meth)acrylate esters (AM/AE) from esters of formula (I) and opt. esters of formula (II), in which R = H or Me; R , R = 1-4C alkyl; n = 0 or more. The process comprises reaction in the liq. phase under reduced pressure in presence of acid, with continuous removal of cleavage prods. Also claimed is a process for the prodn. of (AM/AE) by the acid-catalysed esterification of 1-4C alkanols with (meth)acrylic acid, in which by-prods. (I) and (II) are sepd. from the prod. mixt. and subjected to the above cleavage process, and the cleavage prods. are continuously removed and returned to the esterification process.

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