Abstract:
Leathers and pelts are water-proofed in an aqueous emulsion in the presence of emulsifiers by comb-like carboxylated polysiloxanes in which the carboxyl groups are linked to the main polymer chain by spacer groups in the form of linear or branched C2- to C40-alkylene groups that may be separated by up to 8 non-adjacent oxygen atoms or groups having the formulas -NR -, CO- or -CO-NR and that may additionally bear up to 5 carboxyl groups or carboxylic acid amide groups having the formula -CO-NR R in which the residues R and R stand for hydrogen or C1- to C4-alkyl. The spacer groups are linked to the main polymer chain by a direct bond, an oxygen atom or a group having the formulas -NR -, -CO-, -CO-NR - or -CO-O-.
Abstract:
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-.
Abstract:
Aqueous solutions or dispersions of copolymers obtainable by the radical copolymerisation of A1) 50 to 60 mol% C6 to C40 mono-olefines or C6 to C40 alkyl vinyl ethers or mixtures of C6 to C40 alkyl vinyl ethers and up to 50 mol%, in relation to the entire quantity of the component A1, C6 to C40 monoolefines with B1) 60 to 40 mol% of monoethylenically unsaturated C4-C8 dicarboxylic acid anhydrides, or by the radical copolymerisation of A2) 50 to 90 wt % C6 to C40 alkyl acrylates or methyl acrylates or vinyl esters of C6 to C40 carboxylic acids or mixtures thereof with B2) 10 to 50 wt % of monoethylenically unsaturated C3 to C12 carboxylic acids, monoethylenically unsaturated C4 to C12 dicarboxylic acid anhydrides, semi-ester or semi-amides of monoethylenically unsaturated C4 to C12 dicarboxylic acids, amides of monoethylenically unsaturated C3 to C12 carboxylic acids or mixtures thereof, to form copolymers with molar masses of 500 to 30,000 whereby the carboxyl groups present in an aqueous medium are at least partly neutralised and part of the carboxyl groups may be amidated, and which are characterised by an emulsifier content of 0.5 to 40 wt % in relation to the quantity of copolymer. These aqueous solutions or dispersions are suitable for stuffing and fulling leathers and fur pelts.
Abstract:
Aqueous solutions or dispersions of copolymers obtainable by free-radical copolymerization of(a) from 20 to 90% by weight of at least one monoethylenically unsaturated C4-6-dicarboxylic acid or the anhydride thereof, as component A,(b) from 5 to 50% by weight of at least one olefin having 2 to 6 carbon atoms, as component B,(c) from 5 to 50% by weight of at least one hydrophobic comonomer from the group consisting of long-chain olefins, esters of long-chain alcohols with acrylic acid or methacrylic acid, long-chain amides of acrylic acid or methacrylic acid, and long-chain alkyl vinyl ethers, as component C,(d) from 0 to 40% by weight of further comonomers which can be copolymerized with the above monomers, as component D,where the sum of the amounts of components A, B, C and, if used, D is 100% by weight, followed by at least partial esterification or hydrolysis and neutralization and/or reaction of the carboxyl groups formed during the hydrolysis with bases, for treating leather and/or fur skins.
Abstract:
Aqueous solutions or dispersions of copolymers obtainable by free-radical copolymerization of(a) from 20 to 90% by weight of at least one monoethylenically unsaturated C4-6-dicarboxylic acid or the anhydride thereof, as component A,(b) from 5 to 50% by weight of at least one olefin having 2 to 6 carbon atoms, as component B,(c) from 5 to 50% by weight of at least one hydrophobic comonomer from the group consisting of long-chain olefins, esters of long-chain alcohols with acrylic acid or methacrylic acid, long-chain amides of acrylic acid or methacrylic acid, and long-chain alkyl vinyl ethers, as component C,(d) from 0 to 40% by weight of further comonomers which can be copolymerized with the above monomers, as component D,where the sum of the amounts of components A, B, C and, if used, D is 100% by weight, followed by at least partial esterification or hydrolysis and neutralization and/or reaction of the carboxyl groups formed during the hydrolysis with bases, for treating leather and/or fur skins.
Abstract:
Soluciones o dispersiones acuosas de copolimerizados, que se obtienen por copolimerizacion iniciada por radicales libres de A1) 40 hasta 60% en mol de monoolefinas con 6 hasta 40 átomos de carbono o alquil vinil éteres con 6 hasta 40 átomos de carbono o mezclas a partir de alquil vinil éteres con 6 hasta 40átomos de carbono y hasta 50% en mol, con respecto a la cantidad total del componente A1, de monoolefinas con 6 hasta 40 átomos de carbono, con B1) 60 hasta 40% en mol de anhídridos de ácidos dicarboxilicos monoetilénicamente insaturados con 4 hasta 8 átomos de carbono o por copolimerizacion iniciada por radicales libres de A2) 50 hasta 90% en peso de acrilato o metacrilatos de alquilo con 6 hasta 40 átomos de carbono o vinil ésteres de ácidos carboxílicos con 6 hasta 40 átomos de carbono, o mezclas de los mismos, con B2) 10 hasta 50% en peso de ácidos carboxílicos monoetilénicamente insaturados con 3 hasta 12 átomos de carbono, anhídridos de ácidos dicarboxílicos monoetilénicamente insaturados con 4 hasta 12 átomos de carbono, semiésteres o semiamidas de ácidos dicarboxílicos monoetilénicamente insaturados con 4 hasta 12 átomos de carbono, amidas de ácidos carboxílicos monoetilénicamente insaturados con 3 hasta 12 átomos de carbono, o mezclas de los mismos dando copolimerizados con masas molares de 500 hasta 30 000, estando los grupos carboxilo presentes en el medio acuoso al menos parcialmente neutralizados y pudiendo una parte de los grupos carboxilo estar presentes en forma amida, cuyas soluciones o dispersiones acuosas están caracterizadas por contener 0.5 hasta 40% en peso, con respecto a la cantidad de copolimerizado, de emulsionantes. Estas soluciones o dispersiones acuosas son apropiadas para el engrase y relleno de cueros y pieles.
Abstract:
of the disclosure: The invention relates to a process for preparing .beta.-alaninediacetic acid (Ia) or its alkali metal or ammonium salts (Ib) which comprises reacting iminodiacetic acid with acrylonitrile or C1-C4-alkyl acrylates in weakly acid to weakly basic aqueous medium and subsequently hydrolyzing the nitrile or ester moiety to the acid or a salt. The products prepared according to the invention can be used, in particular, to form complexes.