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Process and composition for the hydrophobization of hides and skins and application of polysiloxanes functionalized with carboxyl to the comb shape
Process and composition for the hydrophobization of hides and skins and application of polysiloxanes functionalized with carboxyl to the comb shape
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机译:兽皮和皮革疏水化的方法和组成以及将羧基官能化的聚硅氧烷应用于梳形
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PCT No. PCT/EP95/00418 Sec. 371 Date Aug. 15, 1996 Sec. 102(e) Date Aug. 15, 1996 PCT Filed Feb. 6, 1995 PCT Pub. No. WO95/22627 PCT Pub. Date Aug. 24, 1995Leather and skins are water repellent in aqueous emulsion in the presence of emulsifiers with polysiloxanes which are functionalized with carboxyl groups in a comb-like manner and in which the carboxyl groups are bonded to the polymer main chain via spacer groups in the form of linear or branched C2-C40-alkylene groups which may be interrupted by up to 8 non-neighboring oxygen atoms or groups of the formula -NR1-, CO- [sic] or -CO-NR1- and in addition may carry up to 5 carboxyl groups or carboxamido groups of the formula -CO-NR1R2-, where R1 and R2 are each hydrogen or C1-C4-alkyl, the spacer groups being bonded to the polymer main chain via a direct bond or via an oxygen atom or a group of the formula -NR1-, -CO-, -CO-NR1- or -CO-O-.
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