Abstract: Compounds of the formula I ##STR1## in which a is 1, 2 or 3, m is an integer from 2 to 20, R.sup.1, R.sup.2 and R.sup.3 independently of one another are hydrogen or methyl and R.sup.4 is an m-valent radical of a polyol after removal of m hydroxyl groups, can be thermally reacted to give cross-linked polymers having outstanding physical properties.The polymers are suitable especially as casting resins, matrix resins, adhesives, encapsulating resins, insulating materials for electronics an electrical engineering and in surface protection.

Abstract: A process for producing a highly water adsorptive polymer, which comprises subjecting an aqueous solution of partially neutralized sodium acrylate wherein 20 to 50% or less of the carboxyl group has been neutralized to its sodium salt, the concentration of the partially neutralized sodium acrylate in the aqueous solution being 45 to 80% by weight, to solution polymerization in the presence of a crosslinking agent and optionally not exceeding 20 mol % based on the partially neutralized sodium acrylate of at least one basic vinyl monomer selected from the group consisting of (meth)acrylamide, N,N-dimethyl(meth)acrylamide, dimethylaminoethyl(meth)acrylamide, 2-vinylpyridine, and 4-vinylpyridine with the use of a water soluble radical polymerization initiator.

Abstract: A transparent optical article is constituted of an optical resin. The optical resin in obtained by polymerizing a feed monomer containing at least a diester of unsaturated dicarboxylic acid selected from the group consisting of itaconic acid, citraconic acid and mesaconic acid. The ester group forming the diester is ##STR1## or R, wherein X represents a halogen atom, m represents zero or an integer of 1 to 5 and R represents an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 1 to 12 carbon atoms or a cycloalkyl group having 3 to 12 carbon atoms. At least one of the ester groups has an aromatic ring defined above.

Abstract: A composition, useful for forming absorbent articles of a carboxylic polyelectrolyte, is prepared by copolymerizing a carboxylic polyelectrolyte monomer, a reactive self-crosslinking monomer and a hydrophobic monomer. The composition in the form of an emulsion or a viscous solution has an extendable shelf life and may be used to produce a superabsorbent material or a substrate impregnated with a superabsorbent material.

Abstract: A removable pressure sensitive adhesive composition comprises an acrylic-based emulsion polymer having a gel content of from about 70 to about 90% comprises about 90 to 99.5 parts alkyl acrylate monomers, up to about 2 parts polar monomers and up to about one part of a multifunctional acrylate monomer.

Abstract: Acrylic "Ladder" polymers and their preparation from difunctional monomers and difunctional initiators.

Abstract: Polymeric pour point depressants are described which are prepared from new esters of .alpha.,.beta.-olefinically unsaturated carboxylic acids of the formulaR.sub.1 --CO--[--O--A--CO--]--.sub.n ORwhereinR.sub.1 --CO-- is an .alpha.,.beta.-olefinically unsaturated carboxylic acid residue containing from 3 to 6 carbon atoms,R is a saturated or unsaturated hydrocarbon radical containing from 10 to 24 carbon atoms,--[--O--A--CO--]-- is a residue of a hydroxycarboxylic acid having from 2 to 6 carbon atoms,A is an aliphatic radical having from 1 to 5 carbon atoms, andn is a number having a value of from 1 to 18.

Abstract: An end carboxyl bearing reactive vinyl monomer represented by the formula: ##STR1## wherein R.sub.1 is hydrogen or methyl group; R.sub.2 is a bivalent aliphatic hydrocarbon having 2 to 10 carbon atoms, a bivalent alicyclic hydrocarbon having 6 to 7 carbon atoms, phenylene substituted with halogen, sulfo or carboxyl group; A is a repeating unit of the formula: ##STR2## R.sub.3 is ethylene or propylene; R.sub.4 is an alkylene having 2 to 7 carbon atoms; R.sub.5 is an alkylene having 2 to 5 carbon atoms; m is an integer of 1 to 10 and n is an integer of 2 to 50. The present reactive vinyl monomer is very useful as a constituting unit of vinyl resin.

Abstract: A ferroelectric liquid crystal polymer comprising the recurring units represented by the following general formula: ##STR1## in which k is an integer of from 1 to 30, R.sub.1 is ##STR2## R.sub.2 is --COOR.sub.3, --OCOR.sub.3, --OR.sub.3, or --R.sub.3, in which R.sub.3 is ##STR3## R.sub.4 is --CH.sub.3 or Cl, m is 0 or an integer of from 1 to 10,n is 0 or an integer of from 1 to 10, providing that n is not 0, when R.sub.4 is --CH.sub.3.The ferroelectric liquid crystal polymer of the present invention not only exhibits a ferroelectricity even at temperatures in the vicinity of a room temperature, but also has so fast response speed to the external factors as to be able to display motion pictures, and may be advantageously used as display elements for large size screens and curved screens.

Abstract: A novel heat-curable acrylic-terminated monomer is provided which exhibits an optically anisotropic melt phase at a temperature which enables it to undergo melt processing in the formation of molded articles, etc. Subsequent to melt processing articles prepared from the monomer are capable of being cured to produce a thermoset self-reinforced composite which is soft and flexible relative to prior art monomers. The monomer may, for example, consist essentially of the reaction product of a methacrylic-substituted phenol and terephthalic acid.

Abstract: An actinically curable composition containing (1) an oligomer having a molecular weight within the range of from about 200 to about 3000 and which is end capped with reactive functional groups to provide sites for free radical polymerization by actinic radiation and (2) as a reactive diluent, an N-vinyl-2-oxazolidinone in which the number 4 and 5 carbon atoms each have two constituents which are all independently selected from hydrogen and alkyl radicals having from 1 to 4 carbon atoms.

Abstract: An actinically curable composition containing (1) an oligomer having a molecular weight within the range of from about 200 to about 3000 and which is end capped with reactive functional groups to provide sites for free radical polymerization by actinic radiation and (2) as a reactive diluent, an N-vinyl-2-oxazolidinone in which the number 4 and 5 carbon atoms each have two constituents which are all independently selected from hydrogen and alkyl radicals having from 1 to 4 carbon atoms.

Abstract: Finely divided, gel-like crosslinked polymers are prepared by a continuous method in which a monomer mixture which contains, per 100 parts by weight of acrylic acid or methacrylic acid, from 50 to 100 mol % of which in each case are neutralized, acrylamide, methacrylamide or N-vinylpyrrolidone, from 0 to 30 parts by weight of other water-soluble monoethylenically unsaturated monomers and from 0 to 20 parts by weight of water-insoluble monoethylenically unsaturated monomers is copolymerized with from 0.01 to 5 parts by weight of a crosslinking agent, in 20-65% strength by weight aqueous solution in the presence of an initiator at from 45.degree. to 95.degree. C.

Abstract: Polymeric pour point depressants are described which are prepared from new esters of .alpha.,.beta.-olefinically unsaturated carboxylic acids of the formulaR.sub.1 --CO--[--O--A--CO--]--.sub.n ORwhereinR.sub.1 --CO-- is an .alpha.,.beta.-olefinically unsaturated carboxylic acid residue containing from 3 to 6 carbon atoms,R is a saturated or unsaturated hydrocarbon radical containing from 10 to 24 carbon atoms,--[--O--A--CO--]-- is a residue of a hydroxycarboxylic acid having from 2 to 6 carbon atoms,A is an aliphatic radical having from 1 to 5 carbon atoms, andn is a number having a value of from 1 to 18.

Abstract: This invention relates to polymeric additives useful for inhibition of the deposit of paraffins and improvement of the flow properties of crude oils and to compositions containing crude oils and such additives. The polymeric additive according to the invention consists of a polymer formed by units derived from one or more alkyl esters of unsaturated monocarboxylic acids, one or more unsaturated alpha, beta-dicarboxylic compounds in the form of diacids, low alkyl diesters or anhydrides and one or more monomers having ethylenic unsaturation of the general formula CH.sub.2 .dbd.CZ.sub.1 Z.sub.2, in which Z.sub.1 and Z.sub.2 are the same or different and represent hydrogen, a halogen, a saturated, unsaturated or aromatic hydrocarbon group or an ester or ether group. Compounds containing a crude oil and 5 to 4000 ppm and preferably 100 to 1500 ppm of the additive have much improved flow properties.

Abstract: A photo-setting resin composition having a good storage stability; using no hexavalent chrome; having well-balanced photosenstive and dyeing properties; capable of being developed with an aqueous solvent; and having a superior resolution when a color filter is formed, is provided, which composition is obtained by copolymerizing as effective components, a monomer expressed by the formula ##STR1## wherein R.sup.1 represents H, CH.sub.3 or C.sub.2 H.sub.5 ; X represents --O-- or --NH--; Y represents a linear chain or branched hydrocarbon group of 1 to 4 carbon atoms; .PHI. represents ##STR2## wherein R.sup.2 and R.sup.3 each represent an alkyl group of 1 to 4 carbon atoms and Z.sup..crclbar. represents an anion,with a monomer expressed by the formula ##STR3## wherein R.sup.4 represents H, CH.sub.3 or C.sub.2 H.sub.5 and X and Y each are as defined above.

Abstract: (Meth)-acrylate compounds having one or two terminal (meth)-acrylic acid groups on an oligomer chain which have low volatility and are liquid to solid at room temperature, wherein the oligomer chain is mainly in the form of a polyester oligomer formed from one or more hydroxycarboxylic acids. The preferred (meth)-acrylate compounds are based on polyester-oligomers with a mean molecular weight in the range of about 200 to 600. The invention also relates to the use of these new reactive (meth)-acrylate compounds in construction adhesives.

Abstract: Compositions suitable as binders for high solids, ambient cure coatings, and coating compositions which have high humidity resistance and good weatherability are disclosed herein.

Abstract: A bulk polymerization process for free radical polymerization of vinyl monomers and alkenyl azlactones or macromolecular monomers (e.g. functionalized polystyrene), in a wiped surface reactor is disclosed. Referring to FIG. 1; monomer streams 5 (after purification and silica gel column 2), and 7 and macromer or azlactone 8 are combined with free radical initiator 9 to form a premix 16. Pump 18 transfers the premix stream 22 through static mixer 24 into a wiped surface reactor 27. The reactor can be a counter rotating twin screw extruder which produces polymer stream 36 without the need of solvent and using residence times much shorter than prior art solution or emulsion processes.Some unique pressure sensitive adhesive acrylate polymers have been produced. They are believed to have a relatively high degree of branching. The bulk polymerization process permits the manufacture of pressure sensitive adhesive articles by extruding directly from the twin screw extruder onto a substrate.

Abstract: Disclosed is an ungelled radiation curable resin which is a reaction product of (a) a polyfunctional hydroxyl-containing carboxylic acid having a molecular weight less than or equal to 1,000 and having a total functionality of equal to or greater than 3; (b) an organic hydroxyl-functional compound; and (c) an alpha, beta-ethylenically unsaturated carboxylic acid. Also disclosed is a radiation curable composition containing the radiation curable resin in combination with a polymer having a glass transition temperature equal to or higher than minus 17 degrees Celsius selected from an acrylic polymer and a polyester polymer.The radiation curable resins are particularly useful for coatings over non-metallic substrates such as ABS plastics, etc., having an adherent, thin film of metal deposited by vacuum metallizing, sputtering, electroless deposition, electroplating, and the like.

Abstract: The polymer chain comprises(a) one or more monomers possessing a nematogenic, chiral or smectogenic group, or a mixture of monomers possessing a nematogenic group with those possessing a chiral group, and(b) one or more monomers possessing a radical of a pleochroic dye, and the nematogenic, the chiral and the smectogenic groups are bonded to the polymerizable group either directly or, like the dye radicals, via a spacer.The polymers can be used, together with low molecular weight liquid crystals or liquid crystal mixtures, in electrooptical displays.

Abstract: Acryloxymethyl fatty compounds are provided which are useful as monomers in the preparation of radiation curable coatings. The preferred compounds are acrylate or methacrylate esters of 9(10)-(hydroxymethyl)stearonitrile, 9(10)-(hydroxymethyl)-N,N-dimethylstearamide, methyl 9(10)-(hydroxymethyl)-stearate, N-acetyl-N-methyl 9(10)-(hydroxymethyl)-nonadecanamine, 9(10)-cyano-octadecanol, 9(10)-(carboxydimethylamino)octadecanol, 9(10)-(carboxymethyoxy)octadecanol and 9(10)-(N-acetyl-N-methyl-aminomethyl)octadecanol.

Abstract: A radiation curable pressure-sensitive adhesive composition comprising 100 parts by weight of a liquid oligomer having one or more acrylic unsaturated double bonds in its molecule, 0.2 to 20 parts by weight of a thiol compound and 0.5 to 30 parts by weight of acrylic monomer has high cohesion and is excellent in adhesiveness.

Abstract: Resorcinol monobenzoate is reacted through the hydroxyl group preferably with an acrylic prepolymer containing glycidyl methacrylate. The product can be used in coating compositions and films to give highly ultraviolet absorbent properties.

Abstract: Resorcinol monobenzoate is reacted through the hydroxyl group preferably with an acrylic prepolymer containing glycidyl methacrylate. The product can be used in coating compositions and films to give highly ultraviolet absorbent properties.

Abstract: Compositions comprising polyfunctional acrylate monomers of the formula ##STR1## wherein R.sup.1 is an aliphatic or alicyclic radical having about 20-40 carbon atoms, R.sup.2 is hydrogen or methyl, and n is from 2 to 4, at least about 40% of said monomers containing alicyclic R.sup.1 moieties, may be polymerized to form polymers useful as dielectrics for capacitors. Illustrative polyfunctional acrylates are those prepared from a diol which is the reduction product of linoleic acid dimer, or from condensation products of fatty acids such as linoleic acid with such materials as acrylic acid.

Abstract: Compositions comprising mixed acrylates and propionates, or the like, of polyhydroxy compounds of the formula R.sup.1 (OH).sub.n, wherein R.sup.1 is an aliphatic or alicyclic radical having about 1-40 carbon atoms and n is from 2 to 4, may be polymerized to form polymers useful as dielectrics for capacitors. Said capacitors are characterized by low dissipation factors at both high and low temperatures.

Abstract: A copolymer represented by the general formula: ##STR1## [wherein, A denotes an alkylene group of 2 to 4 carbon atoms, the --A--O--.sub.a chain may have at least one oxy-alkylene unit bonded in any possible order, a denotes an integer of the value of 1 to 100, R.sup.1 and R.sup.2 independently denote a hydrogen atom or a methyl group, X and Y independently denote a monovalent metal atom, a divalent metal atom, an ammonium group, an organic amine group, or --B--O--.sub.b R.sup.3 (wherein, B denotes an alkylene group of 2 to 4 carbon atoms. the --B--O--.sub.b chain may have at least one oxy-alkylene unit bonded in any possible order, b denotes 0 or an integer of the value of 1 to 100, and R.sup.3 denotes a hydrogen atom or an alkyl group of 1 to 20 carbon atoms), Z denotes a structural unit derived from a copolymerizable vinyl monomer, m and n each denote 1 where X and Y are each a monovalent metal atom, an ammonium group, an organic amine group, or --B--O--.sub.b R.sup.

Abstract: A polymer capable of forming an anisotropic melt characterized in that the polymer chain includes residues of cross-linking reactants at a concentration sufficient to give a polymer with a melt viscosity of not greater than 10.sup.7 Nsec/m.sup.2 measured by capillary rheometry at a shear rate of 10.sup.4 N/m.sup.2. The polymers exhibit favorable shear dependent viscosity characteristics in that the viscosity is high under low shear conditions and is low under high shear conditions, as judged by the viscosity characteristics of polymers of the same composition but not containing the residues of cross-linking reactants.

Abstract: The present invention provides a relatively low molecular weight polymer comprising units derived from an unsaturated dicarboxylic acid and units derived from octadienol. The polymer exhibits a fluid viscosity of at least about 200 cp when measured in the neat state at room temperature using a Brookfield viscosimeter. The unsaturated dicarboxylic acids from which the polymer units are derived include fumaric acid, maleic acid, and mixtures thereof. The octadienol from which the polymer units are derived commonly comprises a mixture of 2,7-octadien-1-ol and 1,7-octadien-3-ol. Preferably, the polymer exhibits a fluid viscosity of about 700-900 cp. The process for preparing the polymer comprises reacting octadienol with an unsaturated dicarboxylic acid selected from fumaric acid, maleic acid, lower alkyl diesters of said acid, and mixtures thereof in the presence of an esterification catalyst. Preferably, the esterification catalyst comprises dibutyltin oxide and is present in an amount of about 0.

Abstract: Paint compositions to be used for preventing deposition of organisms on marine structures or fishingnets used in the sea contain, as a vehicle, polymers obtained by polymerizing at least one of the unsaturated acid ester monomers shown by the general formulaR.sub.1 OOC--CX.dbd.CY--COOR.sub.2wherein R.sub.1 and R.sub.2 are alkyl groups having 1-4 carbon atoms, and X and Y are hydrogen, alkyl groups having 1 or 2 carbon atoms or halogen, or copolymerizing the unsaturated acid ester monomers having the above described formula with unsaturated monomers copolymerizable therewith. The coating film of the paint compositions has a high strength and a moderate solubility in sea water and exhibits a very high antifouling activity for a long period of time.

Abstract: An optical lens having an absorbance of less than about 0.1 for visible radiation of a wavelength in the range of from about 400 to about 600 nanometers is prepared from a crosslinkable acrylic composition. The composition consists essentially of an acrylic monomer and an acrylated urethane oligomer and exhibits a shrinkage upon curing of less than about 0.4%. The lens is prepared by introducing the crosslinkable composition into a lens-forming means and curing it until it is substantially crosslinked.

Abstract: The reaction of glycidyl methacrylate (GMA) with an ionogenic methacrylate ester containing amine groups of the tertiary type such as dimethylaminoethyl methacrylate (DMAEMA) in the presence of an acidic water solution produces a new and novel water soluble, ionic, cross-linking, methacrylate bifunctional monomer which is useful in the manufacture of anion exchange polymers while employing an aqueous solvent system.

Abstract: Gasoline-soluble copolymers containing, as copolymerized units,(A) from 10 to 40% by weight of styrene,(B) from 10 to 50% by weight of tert.-butyl acrylate and/or vinyl pivalate,(C) from 20 to 40% by weight of isobutyl methacrylate,(D) from 5 to 20% by weight of acrylic acid esters and/or methacrylic acid esters of alkanols of 10 to 20 carbon atoms and(E) from 0 to 5% by weight of monoolefinically unsaturated monocarboxylic acids and/or dicarboxylic acids of 3 to 5 carbon atoms and/or their .beta.-hydroxyalkyl esters and/or monoalkyl esters of the dicarboxylic acids,the amount of component (D) being from 20 to 50% by weight of that of component (A), and the sum of the percentages of A to E being 100, are particularly suitable for use as binders for gasoline-containing masonry paints and renders.

Abstract: The invention relates to the polar polymeric sorbent applicable in gas and liquid chromatography, which is based on glycidyl esters. The sorbent is formed by the macroporous copolymer containing 3-70% of polymerized monomeric units with epoxy groups, e.g. glycidyl methacrylate or glycidyl acrylate units, and 97-30% of a crosslinking agent, e.g. alkylene dimethacrylate, alkylene diacrylate, hydroxyalkylene dimethacrylate, hydroxyalkylene diacrylate (alkylene containing 1-6 C atoms), or divinylbenzene. The sorbent may further contain up to 30% of polymerized monomeric units containing nitrile groups, e.g. acrylonitrile and methacrylonitrile units. The polarity of sorbent can be further modified, according to the invention, by the reaction with various nucleophilic agents, e.g. water, alcohols, carboxylic acids and their derivatives, ammonia, amines, thioalcohols, acrylonitrile.

Abstract: This invention relates to an improvement in a mixture which is polymerizable by radiation and contains, as the essential constituents, (a) a polymeric binder, (b) a polymerization initiator which can be activated by radiation, and (c) a compound of the formula I ##STR1## in which R.sub.1 is a divalent aliphatic group having 1 to 15 carbon atoms which also can be partially replaced by hetero-atoms, a divalent cycloaliphatic group having 3 to 15 carbon atoms, or a mixed aliphatic-aromatic group having 7 to 15 carbon atoms, and A is an electron-attracting radical. The invention also relates to a radiation-sensitive resist material using the improved radiation-polymerizable mixture.

Abstract: Curable acrylate ester compositions having as an accelerator for the polymerization a hydrazine derivative of the formula R.sup.1 --HN--NH--CO--R.sup.2. Typical of the monomers are the polyalkyleneglycol dimethacrylates and the so-called urethane acrylates. Polymerization is preferably initiated by a peroxy compound such as cumene hydroperoxide, such a composition having anaerobic curing characteristics.

Abstract: A liquid separating agent used for fractionating a liquid such as blood that contains more than one component of different specific gravities, by separating a specific component from other components by means of the specific gravity difference is characterized by consisting of as the main component an .alpha.-olefin-dialkylmaleate copolymer having a viscosity between 10,000 and 80,000 cp (at 25.degree. C.); a viscosity and specific gravity adjusting agent such as silica or clay; and wax, a surfactant and so on as required.

Abstract: A process for forming an image comprising image-wise exposing a support having thereon a cinnamoyl group containing light-sensitive polymers containing at least 64 mol % of cinnamoyl groups is disclosed.

Abstract: A liquid-crystalline polymer phase having an induced cholesteric structure comprises a component having a chiral structure and a component having a nematic structure and contains a polymer with nematogenic units of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl, n is an integer from 1 to 6 and R.sub.3 represents specific structural elements containing at least two phenylene groups. Preferred is a copolymer comprising a component of the above formula and an additional chiral component of similar structure, prepared by copolymerization of the nematogenic monomer with the chiral monomer.The liquid-crystalline polymer phase permits variation of the wavelength of the reflected light .lambda..sub.R, and its cholesteric structure can be converted to the glassy polymer state and remains preserved in the solid state. Such liquid-crystalline polymer phases can be used in integrated optics, opto-electronics and information storage, e.g. for the manufacture of polarization filters or selective reflectors.

Abstract: A process for the preparation of copolymers in which in a first step an olefinically unsaturated dicarboxylic acid is reacted with a polyhydric alcohol to yield a hemi-ester having free hydroxyl groups, which in a second step is reacted with a monoepoxy compound to yield an olefinically unsaturated diester containing hydroxyl groups, wherein the diester is copolymerized in at least one further step with at least one unsaturated monomer having no free carboxyl groups, and the hardenable reaction product thus obtained is either isolated or hardened with a hardening agent, and coating and adhesive compositions containing a copolymer thus obtained.

Abstract: A method for producing a vinyl chloride resin comprising 10 to 80% by weight of tetrahydrofuran-insoluble vinyl chloride resin gel fraction and the balance of tetrahydrofuran-soluble fraction with an average polymerization degree of 1,000 or more, characterized in that vinyl chloride alone or a mixture of a major amount of vinyl chloride and a minor amount of at least one monomer copolymerizable therewith is polymerized at a temperature of 0.degree. to 50.degree. C. in the presence of at least one polyfunctional monomer having two or more ethylenic double bonds in the molecule until the whole monomer or monomers in the polymerization system are substantially polymerized. The thus obtained vinyl chloride resin is excellent in processability and capable of forming a molded article having a small compression permanent set.

Abstract: A vulcanizable elastomeric composition comprising(a) from about 89-40%, by weight, based on the total weight of the composition, of an acrylic acid ester, or mixture thereof, having the formula ##STR1## wherein R is an alkyl (C.sub.1 -C.sub.4) radical, --CH.sub.2 CH.sub.2 OR', wherein R' is an alkyl (C.sub.1 -C.sub.4) radical, or --CH.sub.2 CH.sub.2 CN;(b) from about 10-45%, by weight, same basis, of bis (2-methoxyethyl) fumarate, bis (2-methoxyethyl)maleate, or mixtures thereof, and(c) from about 1-10%, by weight, same basis, of an unsaturated monomer containing a halogen atom or an epoxy group.

Abstract: A powdered copolymer of an ethylenically unsaturated compound having a terminal double bond such as diisobutylene, styrene, an acrylate or an methacrylate and maleic anhydride or an ester thereof can directly be obtained by a polymerization process which comprises polymerizing the monomer mixture in a kneader or a Banbury type mixer in the presence or absence of a poor solvent for the copolymer to be produced to form a highly viscous resin phase containing the copolymer produced and the starting monomers dissolving said copolymer, kneading the highly viscous resin phase, proceeding further the polymerization reaction while kneading and shearing the resin phase to produce solid aggregates, and powdering said aggregates to produce a powdered copolymer.

Abstract: Styrene-type monomers are polymerized, or mixtures of styrene-type monomers and other vinyl type monomers and copolymerized, at 50.degree.-120.degree. C. using 1-10 wt%, based on the weight of the monomers, of an organic peroxide polymerization initiator whose decomposition temperature at 10 hours of halflife is 40.degree. C. to 70.degree. C. whereby colorless low molecular weight styrene series polymers are obtained at a high yield, using polymerization apparatus of simple structure.

Abstract: Storage-stable anaerobic curing adhesive compositions useful as anaerobic adhesives and sealants are prepared by first mixing a polymerizable acrylate ester monomer, an inhibitor for free radical polymerization, a chelator, and at least an effective amount of an accelerator system consisting of an organic cyclic sulfimide, preferably saccharin, and an aromatic tertiary amine. The resultant homogeneous mixture is thereafter heated at a temperature of about 45.degree.-100.degree. C. for a period of time sufficient to provide the composition with anaerobic curing properties and a specified minimum amount of active oxygen. In one embodiment, the mixture is stirred at a temperature of 45.degree.-70.degree. C. for 10-24 hours. In another embodiment, the mixture is maintained at an elevated temperature without stirring.

Abstract: The disclosure describes an improved process for the preparation of uniform, spherical beads of up to 5 mm diameter of a crosslinked, water-insoluble hydrogel by suspension polymerization in a concentrated aqueous salt solution of 95-30% by weight of a monoolefinic water-soluble monomer containing at least 5% of a hydroxy substituted hydrophilic vinyl monomer with 5-70% by weight of a terminal diolefinic macromer crosslinking agent in the presence of water-insoluble, gelatinous, strong water-bonding inorganic metal hydroxides as suspending agents in the absence of excess alkali. The hydrogels have a host of pharmaceutical and industrial uses.

Abstract: Ambient or low-temperature curable solutions or aqueous dispersions of (1) a polymer containing units polymerized from a monomer mixture of (a) from about 0.25% to about 30% by weight of a polymerizable aldehyde, and (b) at least one copolymerizable mono-ethylenically unsaturated monomer, with (2) a curing agent selected from the group of dicarboxylic acid bis-hydrazides, dicarboxylic acid bis-hydrazones, and acrylic oligomers and low molecular weight acrylic solution polymers containing a plurality of pendant hydrazide or hydrazone groups. The solutions or dispersions are useful as general industrial coatings, maintenance coatings, furniture and appliance coatings, heavy transportation coatings, automobile refinishes and plastics coatings.

Abstract: A process for producing a resin dispersion characterized in that an ethylenically unsaturated monomer capable of forming a polymer insoluble in an aqueous medium is polymerized in a solution formed by dissolving in said aqueous medium a water-soluble polymer derived from(1) 10-90% by weight of a hydroxyalkyl (meth-)acrylate expressed by the following general formula ##STR1## wherein R is a hydrogen atom or a methyl group, and l is an integer of 2, 3 or 4,(2) 10-90% by weight of a polyalkyleneglycol mono (meth-)acrylate expressed by the following general formula ##STR2## wherein R is a hydrogen atom or a methyl group, m is an integer of 2 or 3, and n is an integer of 2 to 20, and(3) 0-30% by weight of another ethylenically unsaturated monomer.

Abstract: A soft contact lens having a water content of 20 to 45% and a tensile strength of at least 500 g/mm.sup.2 can be produced by pouring into a mold a composition comprising 70 to 90% by weight of an alkylene glycol monomethacrylate, 0 to 2% by weight of a polyfunctional monomer as a crosslinking agent, 0 to 5% by weight of an unsaturated carboxylic acid containing at least one carboxyl group in its molecule, 2 to 25% by weight of a methacrylic acid ester and 0 to 10% by weight of a vinyl monomer such as vinyl acetate, effecting polymerization of the composition, processing the resulting polymer into a lens, and then hydrating and swelling the lens thus obtained.