Abstract: In a process for preserving a mineral molding by coating the surface of the mineral molding with an aqueous composition comprising an aqueous polymer dispersion, the dispersed polymer P comprises an ethylenically unsaturated acid of the 2-acrylamido-2-methylpropanesulfonic acid type polymerized into it in free-radically polymerized form.

Abstract: In a process for preserving a mineral molding by coating the surface of the mineral molding with an aqueous composition comprising an aqueous polymer dispersion, the dispersed polymer P comprises an ethylenically unsaturated acid of the 2-acrylamido-2-methylpropanesulfonic acid type polymerized into it in free-radically polymerized form.

Abstract: In a process for preserving a mineral molding by coating the surface of the mineral molding with an aqueous composition comprising an aqueous polymer dispersion, the dispersed polymer P comprises an ethylenically unsaturated acid of the 2-acrylamido-2-methylpropanesulfonic acid type polymerized into it in free-radically polymerized form.

Abstract: At least one single-stage or multistage stirrer which produces not only a tangential flow component but also an axial flow field is used in a stirred-vessel reactor in connection with the preparation of polymers by liquid phase polymerization.

Abstract: Readily filterable and deodorizable aqueous dispersions of pressure-sensitive adhesive, especially for self-adhesive labels, having solids contents of more than 65%, can be prepared with readily reproducible properties by copolymerizing esters of acrylic and/or methacrylic acid in the presence of less than 50 ppm of inhibitor and, preferably, in the presence of from 0.01 to 5% by weight of reducing agent by a special emulsion technique. The highly concentrated pressure-sensitive adhesive dispersion, subsequently deodorized with steam, is free from coagulum and seediness.

Abstract: A method of emptying vessels containing dispersions, solutions or suspensions of polymers in which during the emptying process the liquid medium also used to take up the polymers into the dispersion, solution or suspension is passed into the space within the vessel that is not filled by the solution, dispersion or suspension, wherein the liquid medium used to take up the polymers into the dispersion, solution or suspension is introduced in vapor form.

Abstract: A method of filling and emptying storage tanks containing aqueous dispersions, where the storage tank is emptied via a line whose opening is located in the lower section of the storage tank entails filling the storage tank with a line whose outlet follows the changes in the level of the liquid surface in the course of filling and removal procedures, the level of the outlet being adjusted such that the opening is located approximately at the height of the level of the liquid.

Abstract: A process for compounding polymer dispersions, which comprises circulating the polymer dispersion from a vessel (7) having a stirring device (6) through a line (3) having a mixing device (2) by means of a pump (4) which is located in the line (3), and, before the entry of the circulated polymer dispersion into the mixing device (2), metering at least one solution or dispersion of at least one compounding material from at least one stock container (5) via a supply line (9) into the circulated polymer dispersion.

Abstract: UV-crosslinkable materials based on (meth)acrylate copolymers and containing from 0.01 to 10% by weight, based on the copolymer, of copolymerized monomers of the formula I ##STR1## where x is alkyl of 1 to 3 carbon atoms or is phenyl which is unsubstituted or substituted by n Y groups, Y is --H, --CF.sub.3, --O-- alkyl and/or alkyl-COO--, where alkyl in each case is of 1 to 4 carbon atoms, halogen, --CH, --COOH or a non-ortho --OH group, n is from 0 to 4 and Z is a group of the formula ##STR2## where R is H or C.sub.1 -C.sub.4 -alkyl and A is an alkylene, oxaalkylene or polyoxaalkylene radical of 2 to 12 carbon atoms are used as hotmelt adhesives, for coating sheet-like mineral substrates and as surface coatings.

Abstract: Abstract of the Disclosure: Polymers of olefinically unsaturated monomers and solutions of these polymers are obtainable by a process in which the olefinically unsaturated monomers are polymerized in the presence of a free radical initiator in solution under polymerization conditions which are otherwise predetermined, in such a way that the solvent and/or a liquid part of one or more reactants of the polymerization batch are initially taken and heated to the polymerization temperature, and some or the total amount of the monomers to be polymerized is fed continuously to the agitated initially taken part of the polymerization batch via one or more feeds, with maintenance or initiation of the polymerization, in such a way that the outlet orifice of the one or more feeds is located below the surface of the initially taken liquid part of the polymerization batch.

Abstract: The invention relates to UV-crosslinkable copolymers built up fromA) from 99.5 to 75% by weight of olefinically unsaturated monomers,B) from 0.5 to 25% by weight of unsaturated compounds of the formula I ##STR1## and C) from 0.01 to 10% by weight of copolymerizable, olefinically unsaturated acetophenone and/or benzophenone derivatives containing no phenyl group having a free hydroxyl group in the ortho-position to the carbonyl group, whereX is O, S or NR.sup.1 andR is unsubstituted or substituted C.sub.2 - to C.sub.6 -alkylene, andR.sup.1 is C.sub.1 - to C.sub.8 -alkyl or phenyl.The copolymers according to the invention are suitable, after crosslinking, as coating agents, impregnants or adhesives and in particular as contact adhesives.

Abstract: Radiation-reactive mixtures suitable for producing insulating layers and printed circuits are composed of certain precursors for preparing polyimides polyisoindoloquinazolinediones, polyoxazinediones, polyquinazolinediones or polyquinazolones and aryl-containing carbonyl compounds which when excited by UV radiation are capable of hydrogen abstraction, these mixtures undergoing solubility differentiation on irradiation with actinic light.

Abstract: Synthetic resins are obtainable by chemically bonding one or more compounds of the general formula I ##STR1## where R.sup.1 is --OH, --NH.sub.2, ##STR2## --NHR.sup.3 or ##STR3## R.sup.2 is --H, --CH.sub.3 or --C.sub.2 H.sub.5, R.sup.3 is --C.sub.m H.sub.2m+1, where m is from 1 to 6, R.sup.4 is --H or --CH.sub.3 and n is from 1 to 12, via the oxygen or nitrogen atom of R.sup.1 to one or more polymers A which consist ofa) from 50 to 100% by weight of one or more esters of acrylic or methacrylic acid with monohydric alcohols of 1 to 18 carbon atoms or a mixture of these esters (monomers a) andb) from 0 to 50% by weight of other copolymerizable monomers (monomers b) in polymerized form,in amounts such that the synthetic resin contains from 0.01 to 1 mole of double bonds per kg of polymer A.After exposure to ultraviolet light or to electrons, these synthetic resins are suitable as contact adhesives.

Abstract: UV-crosslinkable materials based on (meth)acrylate copolymers and containing special modified unsaturated benzophenone derivatives as copolymerized units are used as hotmelt adhesives, for coating sheet-like mineral substrates and as surface coatings.

Abstract: Radiation-sensitive, ethylenically unsaturated compounds and a process for their preparation. The ethylenically unsaturated organic compounds are of the general formula ##STR1## where R is alkyl, aryl or a radical R.sup.1 andR.sup.1 is a radical ##STR2## where R.sup.2 to R.sup.6 are each H, alkyl, OH, OAlkyl, SH, SAlkyl, halogen, N (Alkyl).sub.2 or N (Alkyl) (Aryl) and at least one but not more than three of the radicals R.sup.2 to R.sup.6 is or are a radical ##STR3## where X is alkylene, cycloalkylene, oxaalkylene or arylene, Y is H or CH.sub.3 -- and Z is O or NY.The novel radiation-sensitive ethylenically unsaturated compounds are suitable for the preparation of polymeric radiation-sensitive compounds.

Abstract: Unsaturated phenone derivatives of the general formula I ##STR1##whereR.sup.1 is C.sub.1 -C.sub.4 -alkyl, cyclopropyl, cyclopentyl, cyclohexyl, indanonyl, tetralonyl, phenyl or phenyl in which some or all of the hydrogen atoms have been replaced by a C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -thioalkyl group, or together with R.sup.2 or R.sup.6 forms an ethylene or propylene bridge,R.sup.2 to R.sup.6 are each hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -thioalkyl, and R.sup.3, R.sup.4 and R.sup.5 may each additionally be hydroxyl, R.sup.2 or R.sup.6 may additionally together with R.sup.1 form an ethylene or propylene bridge and one or more, but not more than three, of the radicals R.sup.2 to R.sup.6 are a group of the general formula II ##STR2##whereK is C.sub.1 -C.sub.10 -alkylene which may contain 1 or 2 oxygen or sulfur atoms,Y is straight-chain or branched C.sub.1 -C.sub.10 -alkylene or is C.sub.1 -C.sub.

Abstract: Aqueous synthetic resin formulations containingA) from 3 to 75% by weight of one or more synthetic resins,B) one or more organic compounds having two or more hydrazide groups,C) from 0 to 10% by weight, based on the synthetic resin A, of benzophenone or acetophenone or of one or more acetophenone or benzophenone derivatives which are not monoethylenically unsaturated or of a mixture of these active ingredients,D) effective amounts of emulsifiers or protective colloids or of a mixture of these active ingredients,E) not less than 5% by weight of water andF) from 0 to 85% by weight of finely divided fillers, with the proviso that the total amount of the monomers d polymerized in the one or more synthetic resins A and of component C is from 0.05 to 10% by weight, based on the one or more synthetic resins A, and the ratio of the number of moles of hydrazide groups of component B and the number of moles of the aldehyde and keto groups of the monomers c polymerized in the one or more synthetic resins A is from 0.

Abstract: The ethylenically unsaturated organic compounds are of the general formula ##STR1## where R is alkyl, aryl or a radical R.sup.1, and R.sup.1 is a radical ##STR2## where R.sup.2 to R.sup.6 are each H, alkyl, OH, Oalkyl, SH, Salkyl, halogen, N(alkyl).sub.2 or N(alkyl)(aryl), and not less than one but not more than three of the radicals R.sup.2 to R.sup.6 are each a radical ##STR3## where X is alkylene or oxaalkylene, each of 2 to 10 carbon atoms, and Y is H or CH.sub.3. These compounds have particularly high photochemical reactivity in the medium-wavelength to relatively long-wavelength UV range.

Abstract: Ethylenically unsaturated compounds of the general formula I ##STR1## where R.sub.1 is alkyl of 1 to 4 carbon atoms, cyclopropyl, cyclopentyl, cyclohexyl, phenyl or phenyl in which some or all of the hydrogen atoms have been replaced by radicals R.sup.4, not more than two substituents R.sup.4 being identical, or R.sup.1 together with R.sup.2 or together with R.sup.6 forms a --CH.sub.2 --CH.sub.2 -- or --CH.sub.2 --CH.sub.2 --CH.sub.2 -- bridge,R.sup.4 is alkyl of 1 to 24 carbon atoms, --OH, --O--R.sup.7, --S--R.sup.7, ##STR2## R.sup.2 or R.sup.6, independently of one another, both are hydrogen, or one of the radicals R.sup.4, or, where R.sup.1 is aryl,R.sup.2 or R.sup.6 is a direct bond to R.sup.1 in the ortho-position with respect to the carbonyl group, andR.sup.3 and R.sup.5 are each hydrogen, one of the radicals R.sup.4 or a group the general formula II ##STR3## where R.sup.7 and R.sup.8 are each alkyl of 1 to 4 carbon atoms,R.sup.9 is cycloalkyl of 5 or 6 carbon atoms,R.sup.

Abstract: Agents which are curable by ultraviolet radiation are based on a binder formulation of (1) from 99.0 to 20% by weight of a copolymer, (2) from 1.0 to 80% by weight of monoolefinically unsaturated compounds and (3) from 0.0 to 20% by weight of polyolefinically unsaturated compounds. The agents contain copolymers (1) which are obtainable by subjecting a mixture of (A) from 80 to 99.9% by weight of olefinically unsaturated monomers, (B) from 0 to 10% by weight of a copolymerizable olefinically unsaturated photoinitiator and (C) from 0 to 10% by weight of a polymerization-regulating photoinitiator to free radical polymerization, the sum of (B) and (C) being not less than 0.1% by weight and the stated percentages by weight being based on the sum of the weights of (A)+(B)+(C).