Abstract: Aqueous dispersions for hydrolysis-resistant coatings, comprising a polyurethane synthesized from

Abstract: A process for preparing recyclable fiber composites, comprising bonding fibers with a polymeric bonding agent applied as an aqueous polymer dispersion to said fibers, the polymeric bonding agent comprising at least one addition polymer which, in the state of an aqueous dispersion, has a film forming capability at the temperature at which the addition polymer is combined with said fibers, and said aqueous polymer dispersion, when subjected to a change in pH, is converted into an aqueous solution of the addition polymer. The aqueous addition polymer of the addition polymer dispersion can contain protic acid groups, and the state of the dispersion can be converted to an aqueous addition polymer solution by raising the pH of the aqueous medium. Alternatively, the addition polymer may contain basic groups, in particular, amino groups, and its state as a dispersion can be converted into an aqueous addition polymer resolution by lowering the pH of the aqueous medium.

Abstract: The invention relates to the use of aqueous polymer dispersions comprising at least one hydrogenated styrene-butadiene copolymer CP, for producing barrier coatings on paper, cardboard, or paperboard.

Abstract: A process for producing sterile nonwovens comprises a textile fabric composed of a fiber web being impregnated with an aqueous dispersion comprising a polyurethane, then dried and irradiated with .gamma.-rays.

Abstract: Packaging films are coated with a polyurethane which bears hydrophilic groups which make the polyurethane water-dispersible and which has a melting point of from 20.degree. to 70.degree. C., with the enthalpy of fusion in this temperature range being at least 20 J/g.

Abstract: Packaging materials are produced by a process which comprises coating substrates suitable for packaging with an aqueous solution or emulsion which contains a copolymer A) composed ofa) from 10 to 100% by weight of an ethylenically unsaturated C.sub.3 -C.sub.5 -carboxylic acid or C.sub.3 -C.sub.5 -di-carboxylic acid or anhydrides or half-esters of the dicarboxylic acids,b) from 0 to 50% by weight of an ethylenically unsaturated compound having at least one sulfo or sulfonate group andc) from 0 to 70% by weight of further monomers,and a polyester B) and, if required, then applying further top coats.

Abstract: A formaldehyde-free binding, impregnating or coating composition comprisesA) a polymer constituted to from 2 to 100% by weight of an ethylenically unsaturated acid or anhydride as comonomer, andB) at least one polyol selected froma triazine of the formula ##STR1## where R.sup.1 to R.sup.3 are each independently of the others a radical X[(C.sub.m H.sub.2m O).sub.n H] or N[(C.sub.m H.sub.2m O).sub.n H].sub.2 where X is NH, O or S, m is from 2 to 5 and n is from 1 to 10,a triazinetrione of the formula ##STR2## where R.sup.4 to R.sup.6 are each independently of the others a radical [(C.sub.m H.sub.2m O).sub.n H] where m is from 2 to 5 and n is from 1 to 10,a benzene or cyclohexyl derivative of the formula ##STR3## where R.sup.7 to R.sup.9 are each independently of the others a radical [X(C.sub.m H.sub.2m O).sub.n H], a radical N[C.sub.m H.sub.2m O).sub.n H].sub.2, a radical [Y(C.sub.m H.sub.2m O).sub.n H] or a radical [(C.sub.m H.sub.2m O).sub.n H] where X is NH, O or S, Y is bivalent C.sub.1 -C.sub.

Abstract: Aqueous dispersions of copolymers of(a) from 70 to 85% by weight of nontertiary butyl (meth)acrylates,(b) from 8 to 27.2% by weight of (meth)acrylates (A) whose homopolymers have a glass transition temperature greater than that of the polybutyl (meth)acrylate up to 0.degree. C. and (meth)acrylates (B) whose homopolymers have a glass transition temperature below that of the polybutyl (meth)acrylate, the weight ratio of the (meth)acrylates (A) to the (meth)acrylates (B) being from 3:1 to 1:3,(c) from 2 to 15% by weight of methyl methacrylate, styrene and/or acrylonitrile and(d) 0.8 to 5% by weight of monoolefinically unsaturated mono- and/or dicarboxylic acids of 3 to 5 carbon atoms and/or their amides which are unsubstituted or substituted at the nitrogen atoms by alkyl and/or alkylol radicals of 1 to 4 carbon atoms and/or hydroxyalkyl (meth)acrylates where the alkyl groups are of 2 to 5 carbon atoms,are used for coating sheet-like substrates.