Abstract: Described is a process for producing aqueous solutions of vinyllactam polymers and solids obtainable therefrom by drying, especially polyvinylpyrrolidone, said process comprising using one or more sulfur components selected from the group consisting of sulfur dioxide, sulfurous acid and one or more salts of sulfurous acid, to reduce residual monomer. Also described are vinyllactam polymers obtainable by the process which have good stability in storage, the use of these vinyllactam polymers, and articles of manufacture and preparations comprising these vinyllactam polymers or obtained by use thereof.

Abstract: Described is a radiation-crosslinkable hotmelt adhesive comprising at least one radiation-crosslinkable poly(meth)acrylate formed to an extent of at least 60% by weight of C1 to C10 alkyl(meth)acrylates and at least one oligo(meth)acrylate which comprises nonacrylic C C double bonds and has a K value of less than or equal to 20. The hotmelt adhesive comprises a photoinitiator which may be present in the form of an additive not attached to the poly(meth)acrylate and/or not attached to the oligo(meth)acrylate, may be incorporated by copolymerization into the poly(meth)acrylate, and/or may be attached to the oligo(meth)acrylate. The hotmelt adhesive can be used for producing adhesive tapes.

Abstract: Described is a process for producing aqueous solutions of vinyllactam polymers and solids obtainable therefrom by drying, especially polyvinylpyrrolidone, said process comprising using one or more sulfur components selected from the group consisting of sulfur dioxide, sulfurous acid and one or more salts of sulfurous acid, to reduce residual monomer. Also described are vinyllactam polymers obtainable by the process which have good stability in storage, the use of these vinyllactam polymers, and articles of manufacture and preparations comprising these vinyllactam polymers or obtained by use thereof.

Abstract: Described is a radiation-crosslinkable hotmelt adhesive comprising at least one radiation-crosslinkable poly(meth)acrylate formed to an extent of at least 60% by weight of C1 to C10 alkyl (meth)acrylates and at least one oligo(meth)acrylate which comprises nonacrylic C—C double bonds and has a K value of less than or equal to 20. The hotmelt adhesive comprises a photoinitiator which may be present in the form of an additive not attached to the poly(meth)acrylate and/or not attached to the oligo(meth)acrylate, may be incorporated by copolymerization into the poly(meth)acrylate, and/or may be attached to the oligo(meth)acrylate. The hotmelt adhesive can be used for producing adhesive tapes.

Abstract: Method of producing copolymers by free-radical polymerization of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer in an organic solvent in the presence of an initiator, where the polymerization is carried out under a gauge pressure such that evaporation of the components is avoided.

Abstract: Methods of producing vinyllactam copolymers which include: providing at least one water-soluble N-vinyllactam; providing at least one hydrophobic comonomer; and subjecting the at least one water-soluble N-vinyllactam and the at least one hydrophobic comonomer to free-radical polymerization in an organic solvent in the presence of an initiator, under a combination of process measures selected from the group consisting of A and B; wherein: (A) comprises (i) polymerization under reflux, and at least two of (ii), (iii), (iv), (v), (vi), and (vii), wherein (ii) comprises an addition of at least 5 mol % of N-vinyllactam to the polymerization mixture if at least 70 mol % of the total amount of hydrophobic monomer used have completely reacted, (iii) comprises return of condensate formed in the reflux from below to the polymerization mixture, (iv) comprises introduction of the initiator in the form of a solution in an organic solvent from below into the polymerization mixture, (v) comprises addition of N-vinyllacta

Abstract: Methods of producing vinyllactam copolymers which include: providing at least one water-soluble N-vinyllactam; providing at least one hydrophobic comonomer; and subjecting the at least one water-soluble N-vinyllactam and the at least one hydrophobic comonomer to free-radical polymerization in an organic solvent in the presence of an initiator, under a combination of process measures selected from the group consisting of A and B; wherein: (A) comprises (i) polymerization under reflux, and at least two of (ii), (iii), (iv), (v), (vi), and (vii), wherein (ii) comprises an addition of at least 5 mol % of N-vinyllactam to the polymerization mixture if at least 70 mol % of the total amount of hydrophobic monomer used have completely reacted, (iii) comprises return of condensate formed in the reflux from below to the polymerization mixture, (iv) comprises introduction of the initiator in the form of a solution in an organic solvent from below into the polymerization mixture, (v) comprises addition of N-vinyllactam t

Abstract: Method of producing copolymers by free-radical polymerization of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer in an organic solvent in the presence of an initiator, where the polymerization is carried out under a gauge pressure such that evaporation of the components is avoided.

Abstract: Preparations in powder form comprising or consisting of soluble or insoluble polyvinylpyrrolidone and/or polyvinylpyrrolidone copolymers and suitable as aid for pharmaceutical formulations comprise in homogeneous dispersion very small amounts of heavy metals which are physiologically tolerated in these amounts, or very small amounts of peroxide-cleaving enzymes.

Abstract: Copolymers which are self-curable with atmospheric humidity and are based on acrylic, methacrylic and/or vinyl esters which have been prepared using silicon-containing regulators, and mixtures of such polymers with crosslinkers, are suitable as adhesive, sealing and coating compositions which are self-curable with atmospheric humidity.

Abstract: Nonaqueous polyisocyanate formulation containinga) one or more aliphatic polyisocyanates having a mean NCO functionality of from 2.5 to 3.

Abstract: Aqueous dispersions of a copolymer obtained by free-radical polymerization and containing from 0.01 to 40% w/w of polymerized units of comonomers having at least one aldehyde or keto group, which dispersions contain at least one polyisocyanate in which the isocyanate groups are blocked by oximes.

Abstract: A) 100 parts by weight of at least one finely divided plastic which consists ofa) from 30 to 100% by weight of methyl methacrylate (monomer I),b) from 0 to 70% by weight of an acrylate of a C.sub.1 -C.sub.8 alkanol or of a methacrylate of a C.sub.2 -C.sub.8 -alkanol or of a mixture of these monomers (monomers II),c) from 0 to 15% by weight of an .alpha.,.beta.-monoethylenically unsaturated mono- and/or dicarboxylic acid of 3 to 5 carbon atoms (monomers III),d) from 0 to 20% by weight of copolymerizable monomers which contain at least one nitrogen base group and/or one hyroxyl group (monomers IV) ande) from 0 to 5% by weight of other copolymerizable monomers (monomers V), in polymerized form,B) from 30 to 300 parts by weight of at least one polymer which consists ofa) from 5 to 100% by weight of glycidyl acrylate and/or methacrylate (monomers VI),b) from 0 to 95% by weight of an acrylate or methacrylate of a C.sub.1 -C.sub.

Abstract: Silicon-containing polymers consist ofa) from 65 to 99.95 parts by weight of one or more acrylates and/or methacrylates of an aliphatic alcohol of 1 to 12 carbon atoms (monomers A),b) from 0 to 30 parts by weight of one or more ethylenically unsaturated monomers capable of undergoing free radical copolymerization (monomers B),c) from 0.05 to 10 parts by weight of one or more anhydrides of an .alpha.,.beta.-monoethylenically unsaturated dicarboxylic acid of 4 to 10 carbon atoms (monomers C) or from 0.1 to 10 parts by weight of one or more monomers containing one or more isocyanate groups and capable of undergoing free radical copolymerization (monomers D) andd) effective amounts of one or more silanes of the general formula INH.sub.2 --R.sup.1 --Si(R.sup.2).sub.3-m (R.sup.3).sub.m (I)where m is 0, 1 or 2, R.sup.1 is a hydrocarbon chain of not more than 10 carbon atoms which may be interrupted by oxygen or nitrogen, the radicals R.sup.2 are identical or different hydrolyzable groups and the radicals R.sup.