摘要:
Layer-type magnetic recording media are produced by dispersing a finely divided magnetically anisotropic material in a binder which consists of not less than 30% of a radiation-curable aqueous binder dispersion, applying the dispersion onto a non-magnetic base, orienting the magnetically anisotropic material and drying and crosslinking the applied layer by means of UV or high-energy electron radiation.
摘要:
A photopolymerizable recording material for the production of relief plates comprises a photopolymerizable layer which can be developed in an alcoholic solution and contains a mixture of a photoinitiator, a photopolymerizable monomer and a linear, high molecular weight polyurethane which possesses activated double bonds in side branches, and is prepared using a polyether-diol from the group comprising the polyethylene glycols, propylene glycols and ethylene glycol/propylene glycol co-condensates.
摘要:
Acylphosphine sulfides of the formula ##STR1## where R.sup.1 is alkyl, cycloalkyl or an unsubstituted or substituted phenyl, naphthyl or heterocyclic radical; R.sup.2 has the meaning of R.sup.1 and can be identical to or different from R.sup.1, or is alkoxy, unsubstituted or substituted phenoxy or phenoxyalkyl, or R.sup.1 or R.sup.2 are linked together to form a ring, which may contain further alkyl substituents and fused-on benzene rings; R.sup.3 is alkyl, a cycloaliphatic radical, substituted phenyl, an unsubstituted or substituted naphthyl or heterocyclic radical or the group ##STR2## where X is unsubstituted or substituted phenylene or an aliphatic or cycloaliphatic divalent radical; and where one or more of R.sup.1, R.sup.2 and R.sup.3 may be olefinically unsaturated.These acylphosphine sulfides can be prepared from acylphosphines and sulfur and can be used as photoinitiators in photopolymerizable compositions.
摘要:
Mixtures comprising (a) pieces of open-cell aminoplastic foam with an average diameter in the range from 50 μm to 5 mm (weight-average), (b) water, (c) at least one surfactant and (d) if appropriate an oil or fat phase.
摘要:
Absorber elements are described of at least one composite material having absorbent elements on a support, in which a plurality of elements of a superabsorbent foam are arranged on at least one support in a grid pattern at distances such that the elements in the swollen state touch at their peripheries.
摘要:
Biodegradable polyesters P1 obtainable by reaction of a mixture consisting essentially of(a1) a mixture consisting essentially offrom 35 to 95 mol % of adipic acid or ester-forming derivatives thereof or mixtures thereof,from 5 to 65 mol % of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, andfrom 0 to 5 mol % of a sulfonate compound, the sum of the individual mole percentages being 100 mol %, and(a2) a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols,the molar ratio of (a1) to (a2) being chosen within the range from 0.4:1 to 1.5:1,with the proviso that the polyesters P1 have a molecular weight (M.sub.n) within the range from 5000 to 50,000 g/mol, a viscosity number within the range from 30 to 350 g/ml (measured in 50:50 w/w o-dichlorobenzene/phenol at a concentration of 0.5% by weight of polyester P1 at 25.degree. C.) and a melting point within the range from 50 to 170.degree. C. and with the further proviso that the polyesters P1 are prepared using from 0.01 to 5 mol %, based on the molar quantity used of component (a1), of a compound D having at least three groups capable of ester formation,and further biodegradable polymers and thermoplastic molding compositions, processes for the preparation thereof, use thereof for producing biodegradable moldings, and adhesives, biodegradable moldings, foams and blends with starch obtainable from the polymers or molding compositions of the present invention.
摘要:
Biodegradable polyetheresteramides Q1 with a molecular weight (M.sub.n) in the range from 6000 to 80,000 g/mol, a viscosity number in the range from 30 to 450 g/ml (measured in o-dichlorobenzene/phenol (50/50 ratio by weight) at a concentration of 0.5% by weight polyetheresteramide Q1 at 25.degree. C.), and a melting point in the range from 50.degree. to 200.degree. C., obtained by reacting a1) from 95 to 99.9% by weight polyetheresteramide P1, obtained by reacting a mixture ofb1) 20-95 mol % adipic acid or ester-forming derivatives thereof, and5-80 mol % terephthalic acid or ester-forming derivatives thereof, andb2) a mixture of a dihydroxy compound selected from C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols,b22) a dihydroxy compound which contains ether functionalities and has the formula IHO--((CH.sub.2).sub.n --O)).sub.m --H Iwhere n is 2, 3 or 4 and m is an integer from 2 to 250, andb23) from 0.5 to 80 mol % of an amino-C.sub.2 -C.sub.12 -alkanol or an amino-C.sub.5 -C.sub.10 -cycloalkanol, with or withoutb24) a diamino-C.sub.1 -C.sub.8 -alkane, and/orb25) a 2,2'-bisoxazolinewhere the molar ratio of (b1) to (b2) is in the range from 0.4:1 to 1.5:1, anda2) from 0.1 to 5% by weight of a divinyl ether C1.
摘要:
The use of polyaspartic acid prepared by polycondensation of aspartic acid in the presence of phosphoric acid in a molar ratio of from 1:0.05 to 1:10 at temperatures of at least 120.degree. C. to give polysuccinimide, and subsequent hydrolysis of the polysuccinimide with bases to give at least partially neutralized polyaspartic acid, as additive to detergents and cleaners in amounts of from 0.1 to 10% by weight, and detergents and cleaners which contain polyaspartic acids prepared in the presence of phosphoric acid.
摘要:
Polymers which contain polyacetal blocks are obtainable by polymerizing carboxylates containing aldehyde groups in the presence of initiators and reacting the polymers with at least bifunctional crosslinking agents in the presence of acids or Lewis acids and, if required hydrolyzing the ester groups present as polymerized units, process for the preparation of the polymers containing polyacetal blocks by polymerizing carboxylates containing aldehyde groups in the presence of initiators and reacting the resulting polyacetals containing terminal hydroxyl groups with at least bifunctional crosslinking agents in the presence of acids or Lewis acids, and the use of the resulting polymers as additives in phosphate-free and reduced phosphate detergents and cleaning agents, as scale inhibitors and as dispersants for pigments.
摘要:
Modified polyaspartic acids are prepared by condensing aspartic acid with polybasic carboxylic acids or anhydrides of polybasic carboxylic acids and ammonia without a diluent at temperatures of at least 140.degree. C. in the absence of inorganic acids.