Abstract: The invention provides a coating composition for coating aluminum which is based on vinyl ester copolymers and an organic solvent, the vinyl ester copolymer comprisinga) 20 to 90 parts by weight of a vinyl ester of saturated aliphatic monocarboxylic acids having 1 to 5 C atoms,b) 0 to 70 parts by weight of a vinyl ester of saturated aliphatic monocarboxylic acids which have 9 to 10 C atoms and a quaternary C atom in the .alpha.-position relative to the carboxyl group,c) 0.05 to 10 parts by weight of one or more ethylenically unsaturated mono- or dicarboxylic acids having 3 to 10 C atoms or anhydrides thereof andd) 0 to 50 parts by weight of one or more ethylenically unsaturated monomers, the homopolymers of which have a glass transition temperature above 30.degree. C.The coating composition is free of chlorine-containing polymers and also avoids the necessity for using a chlorine-containing primer.

Abstract: An acrylic/lactam monomer based polymeric resin is provided which has excellent weatherability, outstanding transparency and optical clarity, improved heath and solvent resistance, as well as improved impact strength. The acrylic/lactam monomer based polymeric resin is formulated by the catalytic activation at ambient temperature of a polymerization syrup which contains from about 300 to about 2970 parts by volume of an acrylic monomer, from about 30 to about 2700 parts by volume of a lactam monomer, from about 0.3 parts to about 40 parts by volume of a mercaptan chain transfer agent and from about 0.3 to about 40 parts by volume of a crosslinking agent capable of crosslinking the acrylic monomer and the lactam monomer. To prevent further polymerization of the polymeric constituents of the polymerization syrup, as well as to enhance the shelf life of the polymerization syrup, an effective amount of a polymerization inhibitor and an ultraviolet light stabilizer are incorporated into the polymerization syrup.

Abstract: An acrylic/lactam monomer based polymeric resin is provided which has excellent weatherability, outstanding transparency and optical clarity, improved heath and solvent resistance, as well as improved impact strength. The acrylic/lactam monomer based polymeric resin is formulated by the catalytic activation at ambient temperature of a polymerization syrup which contains from about 300 to about 2970 parts by volume of an acrylic monomer, from about 30 to about 2700 parts by volume of a lactam monomer, from about 0.3 parts to about 40 parts by volume of a mercaptan chain transfer agent and from about 0.3 to about 40 parts by volume of a crosslinking agent capable of crosslinking the acrylic monomer and the lactam monomer. To prevent further polymerization of the polymeric constituents of the polymerization syrup, as well as to enhance the shelf life of the polymerization syrup, an effective amount of a polymerization inhibitor and an ultraviolet light stabilizer are incorporated into the polymerization syrup.

Abstract: A novel aqueous polymeric formulation is disclosed. Also disclosed are methods of making the polymeric formulation, and of using the polymeric formulation to produce a crosslinked polymeric surface coating on a substrate. One embodiment of the novel polymeric formulation comprises an aqueous carrier; at least one polymeric ingredient; a non-polymeric polyfunctional amine; and base. The one polymeric ingredient has both acid-functional and acetoacetoxy-type functional pendant moieties. The non-polymeric polyfunctional amine has at least two amine-functional moieties. The amount of base contained within the formulation is effective for inhibiting gellation, which would otherwise occur as a result of crosslinking between the acetoacetoxy-type functional and amine-functional moieties. Another embodiment of the novel polymeric formulation comprises at least two polymeric ingredients, one of which has acetoacetoxy-type functional pendant moieties and the other of which has acid-functional pendant moieties.

Abstract: A composition for use as a binder for composite materials comprising a water-compatible furfuryl alcohol-formaldehyde resin and a minor amount of gamma-aminopropyltrimethoxysilane.

Abstract: An aqueous emulsion copolymer of monoethylenically unsaturated monomers which includes from about 0.1 weight % or less to about 10 weight % or greater of a monoethylenically unsaturated macromonomer. These monomers can improve the brush drag of paints made with the emulsion copolymers, and in some instances the leveling is simultaneously improved.

Abstract: Disclosed are optically clear xerogel polymer compositions containing an interpenetrant.

Abstract: Polysuccinimide, polyaspartic acid and their salts are prepared by reaction of maleic anhydride and ammonia, polycondensation of the resulting product in the presence of a solubilizing agent and, if appropriate, hydrolysis.

Abstract: A hot-melt adhesive composition containing, (A) per 10 to 80 parts by weight of a base polymer, (B) 10 to 80 parts by weight of a stickiness-imparting agent which is a copolymer of a particular styrene-type monomer and a particular indene-type monomer, the molar ratio of the indene-type monomer to the styrene-type monomer being from 99/1 to 30/70, and the weight average molecular weight of said copolymer being from 300 to 5000. The hot-melt adhesive composition exhibits excellent heat-resistant adhesiveness and heat-resistant creeping property, and has a low-molecular weight and exhibits good hue.

Abstract: A method for dispersing heavy hydrocarbons in an ethylene process water stripper tower, the method comprising the steps of: introducing an effective amount of a dispersant into the ethylene water stripper, the dispersant comprising a copolymer of an .alpha.-olefin having from about 10 to about 36 carbon atoms and a maleic anhydride, wherein the rate ratio of the .alpha.-olefin to the maleic anhydride is from about 1:1 to about 5:5 and the molecular weight of the copolymer is from about 5,000 to about 100,000, the anhydride moieties of the copolymer being substantially intact.

Abstract: The invention relates to aqueous emulsion copolymers of (meth)acrylates of long-chain alcohols in continuous aqueous phase, characterized in that they contain as storable disperse phase copolymers of the following monomer components:at least 50% by weight and preferably at least 60% by weight (meth)acrylates of C.sub.16-30 alcohols0 to 25% by weight and preferably 5 to 10% by weight (meth)acrylates of alcohols containing no more than 8 carbon atoms0.5 to 40% by weight and preferably 1 to 25% by weight olefinically unsaturated mono- and/or dicarboxylic acids or anhydrides containing more than 10 carbon atoms.The invention also relates to the use of these aqueous emulsion copolymers for depressing the pour or flow points of hydrocarbon mixtures, particularly crude oil or petroleum fractions, the described copolymers forming the disperse phase of aqueous emulsion copolymers in a highly concentrated, but readily mobile formulation for incorporation in hydrocarbon mixtures of the described type.

Abstract: A latex which affords a film having superior heat resistance, gloss, and transparency is comprised of: (1) water; (2) a styrene-maleic anhydride copolymer solubilized by a solubilizing amount of ammonium hydroxide; (3) a graft copolymer which is comprised of a portion of the solubilized styrenemaleic anhydride copolymer onto which is grafted a polymer formed from the polymerization of one or more polymerizable ethylenically unsaturated monomers selected from the group consisting of an acrylate, a methacrylate, an aromatic alkenyl monomer, an aliphatic alkenyl monomer, and combinations thereof; (4) a polymer dispersed in the water which is comprised of one or more ethylenically unsaturated monomers selected from the group consisting of an acrylate, a methacrylate, an aromatic alkenyl monomer, an aliphatic alkenyl monomer, and combinations thereof dispersed in the water; (5) a nonionic or anionic surfactant, or a combination thereof; and, (6) optionally, zinc or zirconyl ammonium carbonate.

Abstract: A polymeric composition suitable for use in ophthalmic devices such as contact lenses, intraocular lenses and other medical and non-medical devices which composition comprises a copolymer that incorporates repeating units containing a solvolyzable group and various desired hydrophilic repeating units in predetermined ratios, which copolymer is mechanically stable and upon hydration the dimensions of polymeric articles which as formed therefrom can be controlled. In particular, the hydrophilic compositions resulting from the invention are user in applications where stresses and distortions of the polymer article due to water absorption etc. must be minimized or, if possible, eliminated.

Abstract: Pigment formulations containing(a) at least one finely divided pigment,(b) at least one copolymer obtainable by free radical polymerization of(.alpha..sub.1) C.sub.8 -C.sub.40 -monoolefins or(.alpha..sub.2) C.sub.8 -C.sub.40 -alkyl vinyl ethers or(.alpha..sub.3) a mixture of C.sub.8 -C.sub.40 -alkyl vinyl ethers and up to 50 mol % of C.sub.8 -C.sub.40 -monoolefins with(.beta.) monoethylenically unsaturated C.sub.4 -C.sub.12 -dicarboxylic acids or C.sub.4 -C.sub.12 -dicarboxylic anhydridesand having a molecular weight of from 500 to 20,000 g/mol, some or all of whose carboxyl or anhydride groups may be reacted with ammnonia, amines, alcohols, amino- or hydroxycarboxylic acids or alkali metal or alkaline earth metal hydroxides, and(c) if required, further assistants conventionally used in pigment formulationsare used for the preparation of pastes, printing inks and coatings.

Abstract: A fine particulate crosslinked type N-vinylcarboxylic acid amide resin having an average particle size of 10 .mu.m or less comprising backbone chains of a homopolymer or copolymer comprising repeating units (A) or (A) and (B) of the formulae: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each independently represent a hydrogen atom or methyl group; X represents a group --COOY, wherein Y represents a hydrogen atom, an alkali metal, a C.sub.1 -C.sub.

Abstract: A water base ink composition which comprises water as a solvent, a carboxyl group containing styrenic resin having an average molecular weight of 1500-30000 and an acid value of 150-300, in an amount of 2-20% by weight, a basic dye in an amount of 0.1-80 parts by weight in relation to 100 parts by weight of the styrenic resin, and an alkali which is volatile at normal temperatures in such an amount as adjusts the ink composition at a pH in the range of 6 to 8.5.

Abstract: An aqueous polymer dispersion gives a film having high resilience in conjunction with reduced surface tack and good aging resistance under the action of light, heat and oxygen and is used for coating leather.

Abstract: A fibrous glass binder comprises a polycarboxy polymer, a monomeric trihydric alcohol and catalyst comprising an alkali metal salt of a phosphorous-containing organic acid.

Abstract: A 2-oxazoline group-containing water-soluble polymer in which the residual amount of an oxazoline monomer has been reduced is produced. An acrylic ester is copolymerized during the polymerization reaction of an addition-polymerizable oxazoline.

Abstract: A low viscosity hot melt acrylic pressure sensitive adhesive polymer is formed by bulk polymerization of at least one alkyl acrylate monomer containing from about 4 to 8 carbon atoms in the alkyl group and present in an amount of from about 60 to about 95% by weight of the polymer, from 1 to about 10% by weight of a copolymerizable amide monomer, from 1 to 10% by weight of a copolymerizble carboxylic acid, and a positive amount up to about 6% by weight of the monomers of a copolymerizable anhydride, said polymer formed thermally reversible crosslinks with a metal cation having a valence of from 2 to 4. Viscosity of the polymer is typically from 2 to 8 Pa.s at 150.degree. C. as formed and increases up to 100 Pa.s at 150.degree. C. on addition of the metal cation.

Abstract: A method is disclosed for dispersing gums in hydrocarbon streams, particularly low molecular weight, sticky polymeric materials formed in refinery and petrochemical plant operation. The dispersant comprises a free radically polymerized copolymer of an .alpha.-olefin of from about 10 to about 36 carbon atoms and maleic anhydride wherein the anhydride moieties along the copolymer backbone are substantially unhydrolyzed. The copolymer has a ratio of olefin to maleic anhydride of from about 1 to about 0.5 and a molecular weight of from 5000 to about 100,000. The dispersant alternatively comprises a dispersant mixture wherein the first component comprises the .alpha.-olefin/maleic anhydride copolymer and the second component comprises an alkyl substituted phenol/formaldehyde liquid polymer, such as nonyl phenol/formaldehyde polymer, or a lipophilic/hydrophilic vinylic polymer, such as hydroxyethyl methacrylate/lauryl acrylate copolymer. Also disclosed is a hydrocarbon dispersion made by the method.

Abstract: An emulsified alkenylsuccinic acid sizing agent having a solid content of not less than 25% by weight is disclosed, which comprises a composition having not less than 25 parts by weight of alkenylsuccinic acid derived from the reaction product of a branched internal olefin of 12-18 carbon atoms with maleic anhydride, and being dispersed in water with an anionic polymer type dispersant or with an anionic polymer type dispersant and an emulsifier.

Abstract: This invention relates to a solubilizing agent for water insoluble vinyl pyrrolidone/acrylic acid copolymers which comprises a mixture of water and an aliphatic oxygen-containing compound having an oxygen to carbon ratio of between about 1:1 and about 0.1:1 combined in a weight ratio of between about 5:1 and about 1:3 water to aliphatic.

Abstract: What is provided herein is a stabilized aqueous solution of a C.sub.1 -C.sub.5 alkyl vinyl ether and maleic acid copolymer which includes about 10-500 ppm of an inorganic reducing agent as a stabilizing additive, said reducing agent being effective to prevent oxygen from the air and peroxides contained in polymer system from degrading the copolymer. Preferably the reducing agent is sulfur dioxide and salts derived from sulfur dioxide and alkali metals such as, sodium or potassium bisulfite, sodium or potassium metabisulfite, sodium or potassium thiosulfite, or sodium or potassium sulfite.

Abstract: A waterbased coating composition formed of an acrylic latex and an acrylic hydrosol dispersed in an aqueous carrier and has a pH of about 7-10; wherein the binder is a blend of an acrylic latex polymer having a particle size of about 0.06-0.20 microns and an acrylic hydrosol polymer having a particle size of less than 0.30 microns; wherein the blend containsa. a methylol (meth)acrylamide carboxyl containing acrylic latex polymer of polymerized monomers of alkyl methacrylate, alkyl acrylate or mixtures thereof, 1-15% by weight of methylol methacrylamide, methylol acrylamide or mixtures thereof, 0.5-10% by weight of ethylenically unsaturated carboxylic acid having reactive carboxyl groups, 0.5-10% by weight of ethylenically unsaturated hydroxyl and the carboxyl groups of the polymer are reacted with ammonia or an amine;b. an acrylic hydrosol polymer of methylol (meth)acrylamide acrylic polymer containing carboxyl and hydroxyl groups about 0.5-10% by weight of an ethylenically unsaturated carboxylic acid, 0.

Abstract: The invention relates to organic copolymers in free acid or salt form with recurring units of formula I ##STR1## in which R is an alkylene radical with 2 to 6 carbon atoms,R.sub.1 is a C.sub.1-20 alkyl-, cycloalkyl- or phenyl group,x, y and z are numbers from 0.01 to 100,m is a number from 1 to 100 andn is a number from 10 to 100,with the provisos, thati) the ratio of x to (y+z) is from 1:10 to 10:1 inclusive,ii) the ratio of z to y is from 3:1 to 100:1, andiii) m+n=15-100.The products of the invention are excellent superplasticizers and can be used as additives to cementitious mixes.

Abstract: The liquid mixtures according to the invention comprise at least one ethylene polymer (A) and at least one solvent (B), and are characterized in that:a) the ethylene polymer (A) comprises at least one terpolymer having a fluidity index comprised between 2 and 500 dg/min and comprising:from 83 to 95.7 moles % of units derived from ethylene,from 4 to 15 moles % of units derived from at least one alkyl acrylate or methacrylate, the alkyl group having from 1 to 6 atoms of carbon, andfrom 0.3 to 2 moles % of units derived from maleic anhydride,b) the solvent (B) is selected from amongst aliphatic, cycloaliphatic and aromatic hydrocarbons having from 5 to 12 atoms of carbon, dechlorinated solvents and esters.The process comprises in a first step the dissolution of polymer (A), by stirring, in the solvent (B) at a temperature T (expressed in Celcius degrees) such that: 35.ltoreq.T.ltoreq..theta., .theta. being the boiling temperature of the solvent (B).

Abstract: Aqueous, uncured but curable, polymer compositions which are stable at room temperature and possess excellent shelf life in uncured form are disclosed. The uncured polymer compositions can be made into fibers using conventional fiber forming processes and cured to produce absorbent fibers capable of absorbing at least 60 times their weight of brine.

Abstract: An ink for heat-sensitive recording which comprises, as color developing components, an aromatic or heterocyclic isocyanate compound and an imino compound which are dispersed and/or dissolved in an organic solvent and, as a binder, (1) a copolymer of a mixture of component (a) which is an .alpha.,.beta.-ethylenically unsaturated carboxylic acid and component (b) which is at least one monomer selected from the group consisting of acrylic acid esters, methacrylic acid esters and aromatic vinyl compounds and/or (2) a three-component- or more component-copolymer, the fundamental skeleton of which is composed of isobutylene and maleic anhydride. The ink may additionally contain a heat-meltable substance and the like. The ink has a good wettability to a plastic substrate and can be dried rapidly in a printing machine.

Abstract: Disposable moldings comprising a polymer (A) having a repeating structure unit in the main chain represented by the formula (I) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are respectively a hydrogen atom or a lower alkyl, and a polymer composition comprising the polymer (A). The moldings of the present invention disintegrate themselves due to decomposition of the polymer (A) in atmosphere, soil or water and do not cause any environmental pollution.

Abstract: An adhesive element which exhibits excellent properties with respect to a variety of substrates, such as, skin, glass, fabric, paper, plastic, and other non-porous surfaces which is non-toxic, and non-sensitizing. The element exhibits high cohesive strength so that its integrity is maintained on removal from the substrate leaving no residues and is highly flexible so that total confirmation with the underlying shape of the substrate is maintained. The adhesive composition is the hydrolysis or esterification product of a methylvinyl ether/maleic anhydride co-polymer with an hydroxylated compound. Methods for preparation of the inventive adhesive element are disclosed.

Abstract: The invention relates to a resin composition for substantially solvent-free paint compositions. The resin composition is a reaction product on the basis ofA) one or more polyalcohols entirely or partly esterified with unsaturated fatty acids,B) an unsaturated compound with fewer than 20 carbon atoms andC) one or more compounds with at least one copolymerizable terminal ethylene group,the molar ratio of A) and C) is between 0.8:1.2 and 1.2:0.8 and the amount of copolymerizable unsaturated compound C) being substantially the same before and after the reaction of A) and C).

Abstract: A water repellent having the following components (A), (B), (C) and (D) emulsified in water:(A) a wax having a melting point of from 40.degree. to 90.degree. C.;(B) a styrene-maleic anydride copolymer;(C) a water-soluble alkaline compound; and(D) a polyvinyl alcohol having a saponification degree of at least 85 mol %.

Abstract: A method for producing an aqueous C.sub.2 -C.sub.8 olefin/maleic anhydride copolymer suspension is disclosed. The aqueous copolymer suspension is particularly suitable for use in applications such as fiber spinning syrups in which a copolymer in dry powder form is not needed.

Abstract: Crosslinkable compositions, a process for their preparation, and their use as casting compositions and for the production of mouldings. The composition can be homogeneously crosslinked at low temperatures. The compositions contain, as a binder, an adduct of maleic anhydride and a polymer based on 70-100% of butadiene and 0-30% of C.sub.2-12 olefins and/or C.sub.4-12 dienes. The compositions are employed as cable jointing compositions or for the production of mouldings.

Abstract: A plastisol composition containing a vinyl chloride type polymer, a plasticizer, an adhesiveness-improving agent and a thermal dissociation-promoting agent, wherein the adhesiveness-improving agent is an aromatic diisocyanate polymer randomly blocked with at least two different members selected from the group consisting of monoalkylphenols and dialkylphenols.

Abstract: Zwitterion polymers are provided herein having the formula: ##STR1## where R is OR', where R' is C.sub.1 -C.sub.8 alkyl or a lactam,X is oxygen or nitrogen,n is 2-10, andR.sub.1 and R.sub.2 are each independently C.sub.1 -C.sub.8 alkyl,and mixtures thereof.

Abstract: Aqueous solutions or dispersions of self-crosslinking binders based on ionically modified polycarboxylic acid polyanhydrides, wherein the binders dissolved or dispersed in water have(a) a total content of lateral carboxylic acid ester, carboxylic acid thioester or carboxylic acid amide groups of up to 500 milliequivalents per 100 grams solids,(b) a content of chemically incorporated carboxylate groups of from 10 to 500 milliequivalents per 100 grams solids and(c) a content of ammonium groups of from 10 to 500 milliequivalents per 100 grams solids,are prepared which comprises a first reaction step wherein polyanhydrides (A) containing intramolecular carboxylic anhydride groups are at least partly reacted, with or without inert solvents, with blocked amines (B) which are activatible by water and which, in addition to blocked amino groups, contain at least one anhydride-reactive hydroxy, mercapto or amino group, in a molar ratio of anhydride groups to anhydride-reactive groups of 10:1 to 0.

Abstract: Pulverulent and liquid detergents contain (1) one or more anionic surfactants, one or more nonionic surfactants or mixtures thereof and (2) copolymers in amounts of from 0.1 to 15% by weight preparable by copolymerization of(a) from 10 to 55 mol % of a 1,2-di-C.sub.1 -C.sub.4 -alkoxyethylene,(b) from 10 to 60 mol % of a monoethylenically unsaturated dicarboxylic anhydride of from 4 to 8 carbon atoms,(c) from 0 to 60 mol % of a monoethylenically unsaturated C.sub.3 -C.sub.8 -monocarboxylic acid and(d) from 0 to 20 mol % of another monoethylenically unsaturated monomerand subsequent hydrolysis of the anhydride groups of the copolymerized monomer (b) or reaction of these groups with an alcohol or an amine.Preferred copolymers contain 1,2 dimethoxyethylene as the (a) monomer, maleic acid as the (b) monomer, and acrylic acid as the (c) monomer.

Abstract: A carbon black-graft polymer, produced by causing a polymer possessing within the molecular unit thereof at least one reactive group selected from the class consisting of aziridine group, oxazoline group. N-hydroxyalkylamide group, epoxy group, and thioepoxy group to react with carbon balck. The polymer can be used as a toner for electrostatically charged image, resin composition, coating composition, ink for thermographic transer, coating gent for magnetic recording medium, rubber composition, and carbon black dispersion and the like.

Abstract: The spread of printing paste when applied to textiles is inhibited by the inclusion of an "anti-wick agent" in the print paste. The "anti-wick agent" comprises a copolymer resulting from the polymerization of at least one monomer selected from the group consisting of methacrylic acid, acrylic acid, maleic acid and maleic anhydride with at least one monomer selected from the group consisting of acrylate esters and N-substituted acrylamides.

Abstract: A copolymer of recurring units of at least one .alpha., .beta.-unsaturated monomer and recurring units of at least one copolymerizable comonomer comprising, in its preferred embodiment from about 20 to about 80 percent pendant carboxylic acid units and from about 80 to about 20 percent pendant carboxylate salt units, is blended with at least one monomer containing at least two hydroxyl groups to produce a water-absorbing composition upon curing. The composition is particularly suitable for fiber formation.

Abstract: A carbon black-graft polymer, produced by causing a polymer possessing within the molecular unit thereof at least one reactive group selected from the class consisting of aziridine group, oxazoline group. N-hydroxyalkylamide group, epoxy group, and thioepoxy group to react with carbon black. The polymer can be used as a toner for electrostatically charged image, resin composition, coating composition, ink for thermographic transer, coating gent for magnetic recording medium, rubber composition, and carbon black dispersion and the like.

Abstract: The liquid mixtures according to the invention comprise at least one ethylene polymer (A) and at least one solvent (B), and are characterized in that:(a) the ethylene polymer (A) comprises at least one terpolymer having a fluidity index comprised between 2 and 500 dg/min and comprising:from 83 to 95.7 moles % of units derived from ethylene,from 4 to 15 moles % of units derived from at least one alkyl acrylate or methacrylate, the alkyl group having from 1 to 6 atoms of carbon, andfrom 0.3 to 2 moles % of units derived from maleic anhydride,(b) the solvent (B) is selected from amongst aliphatic, cycloaliphatic and aromatic hydrocarbons having from 5 to 12 atoms of carbon, dechlorinated solvents and esters.The process comprises in a first step the dissolution of polymer (A), by stirring, in the solvent (B) at a temperature T (expressed in Celcius degrees) such that: 35.ltoreq.T.ltoreq..theta., .theta. being the boiling temperature of the solvent (B).

Abstract: Cationic sizing agents for paper are manufactured by reaction of alpha-olefins with maleix anhydride, imidation of the resulting copolymer with a polyamine having at least one tertiary and one primary amino group, and quaternization of the imide with epichlorohydrin in the presence of water. Copolymers with an average molecular weight of 3000 to 30,000 are used for the conversion into imide. 1 to 50% of the amino groups of the resulting polymeric imide-amine are neutralized with an acid; after partial neutralization, the mixture is diluted with water to a 5 to 50 weight-% emulsion, then quaternized with epichlorohydrin. The sizing agent is especially suitable as a surface-sizing agent and for the sizing of paper from secondary fibers.

Abstract: The invention relates to modified polymers based on polyvinylene carbonate and/or polyhydroxymethylene, the modification being effected by particular alkoxylated compounds incorporated into the polymer. These polymers, for the preparation of which, according to the invention, particular dispersion stabilizers are used, are suitable, inter alia, as carriers for biologically active substances or for affinity chromatography.

Abstract: A novel polymer having repeating units of the formula: ##STR1## (wherein R.sub.1 stands for a hydrogen atom or a methyl group) is produced by polymerizing N-tetrahydrofurfuryl acrylamide or N-tetrahydrofurfuryl methacrylamide. This is a hydrophilic-hydrophobic thermally reversible type polymer.

Abstract: Crosslinked organic resins, containing SiO.sub.2 and sulphonic acid groups, having an SiO.sub.2 content of 0.1-10% by weight, relative to the total weight of the SiO.sub.2 -containing resins, are prepared by steeping crosslinked organic resins, containing sulphonic acid groups, in the alkali form in aqueous alkali metal silicate solutions or (quaternary) alkylammonium silicate solutions, and subsequently precipitating the SiO.sub.2 using mineral acid, and simultaneously converting the resin into the H.sup.+ form. These resins can be used as acid catalysts in the cleavage of tert.-alkyl ethers into the basic tertiary olefins and the basic alkanols. This use has proven particularly advantageous when the tert.-alkyl alkyl ethers to be cleaved are employed together with water for the cleavage.

Abstract: A novel organofunctional silane for use in binding agent compositions employed in foundry sands and the cores and molds made therefrom. The novel organofunctional silane is characterized in that it contains at least one sterically hindered hydrocarbon group and has attached to the silicon atom a nitrogen containing group via a carbon-silicon bond.

Abstract: Acrylic emulsion copolymers are prepared by emulsion polymerization of (A) a surfactant monomer, (B) an .alpha..beta.-ethylenically unsaturated carboxylic acid monomer, (C) a nonionic.alpha..beta.-ethylenically unsaturated monomer and (D) optionally a polyethylenically unsaturated cross-linking monomer. The surfactant monomer is prepared by condensing a polyhydric alcohol or primary amine-containing nonionic surfactant with a monoethylenically unsaturated monoisocyanate. At a low pH the copolymer may be in the form of an aqueous dispersion or latex, but thickens upon neutralization of at least some of the carboxyl groups.