Abstract: A process for preparing a dialdehyde which comprises subjecting a glycol to oxidation-dehydrogenation in the presence of silver particles of which the surface is partially coated with a silicon carbide powder or a silicon nitride powder. According to the present invention, dialdehydes can be prepared from glycols in high conversion of the glycol in high selectivity into the dialdehyde, and the silver catalyst can be reused even if the reaction is stopped in a while since the silver particles are not aggregated during long time operation.

Abstract: A composition comprising(1) a hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60% by mole and a degree of hydrolysis in the vinyl acetate component of at least 95% by mole and(2) a secondary or tertiary alkali metal phosphate; the alkali metal content being from 15 to 250 ppm of the hydrolyzed copolymer (1) and the phosphorus content being from 5 to 70 ppm of the hydrolyzed copolymer (1). The composition of the invention is excellent in adhesive strength to unsaturated carboxylic acid-modified polyolefins, and therefore the laminate having the structure the polyolefin layer/the unsaturated carboxylic acid-modified polyolefin layer/the hydrolyzed ethylene-vinyl acetate copolymer composition of the invention layer has excellent adhesive strength between the unsaturated carboxylic acid-modified polyolefin layer and the layer of the composition of the present invention.

Abstract: Novel organic mixed complexes are provided which have the general formulaD.sup.+.[A.TCNQ]wherein D.sup.+ is an N-alkylonium cation derived from a nitrogen-containing hetercyclic compound (D) selected from the group consisting of pyridines, guinolines, isoquinolines and imidazoles and [A.TCNQ] is an anion radical derived from a 2,5-bis[(alkoxycarbonyl)-ethyl]-7,7,8,8-tetracyanoquinodimethane (A) of the formula ##STR1## in which R is an alkyl group containing 1-10 carbon atoms, and 7,7,8,8-tetracyanoquinodimethane (TCNQ).

Abstract: In a process for producing a highly water-absorbent resin comprising subjecting a mixture of (meth)acrylic acid with a water-soluble salt thereof as a monomer to reversed phase suspension polymerization in a hydrophobic solvent in the presence of a dispersing agent, improvements that at least a portion of said monomer is fed sequentially with the progress of polymerization reaction and at least a portion of said dispersing agent is fed sequentially with the progress of polymerization. The resulting resin is useful as a highly water-soluble resin component of sanitary products, or as a humectant/desiccant, a rheology modifier and so on.

Abstract: A hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60% by mole and a defree of hydrolysis in the vinyl acetate component of at least 95% by mole, and having an ash content of not more than 20 ppm and an alkali metal content of not more than 5 ppm. The hydrolyzed copolymer of the invention can form films whose gas impermeability is not lowered even at high humidity.

Abstract: A process for preparing pellets of a hydrolyzed ethylene-vinyl acetate copolymer which comprises extruding a solution of a hydrolyzed ethylene-vinyl acetate copolymer in methanol or a mixture of water and methanol into a coagulating liquid in the form of a strand, and cutting the strand into pellets, the coagulating liquid consisting essentially of an organic solvent having a boiling point of not more than 100.degree. C., and being compatible with methanol but not being capable of dissolving the hydrolyzed ethylene-vinyl acetate copolymer. According to the present invention, the pellets from which impurities such as sodium acetate can be efficiently removed, and which have excellent thermal stability and moldability can be obtained in high productivity.

Abstract: An drying resin composition comprises (A) at least one radical curable resin selected from the group consisting of an unsaturated polyester resin, an urethane-acrylic resin, a polyester-acrylic resin and an epoxy-acrylic resin, (B) an urethane-acrylic oligomer having 1.0 to 10.0 mmole/g of allyl ether groups and 0.2 to 5 mmole/g of (meth)acryloyl groups, (C) and ethylenically unsaturated monomer and (D) an initiator. The composition has an improved drying property and provides a coating film having improved flexibility, weatherability and water resistance.

Abstract: Polymerization of acrylic or methacrylic acid and a water-soluble acrylic or methacrylic acid salt in the presence of a carboxyl group-containing polyvinyl alcohol resin gives highly water-absorbing resins with the water absorbency, water absorption rate, water insolubility and other characteristics well balanced therein.

Abstract: Novel, highly electroconductive organic complexes are disclosed which have the general formulaD.sup.+.A.sup.-wherein the constituent D.sup.+ is an N-alkyl-onium cation (D.sup.+) derived from a nitrogen-containing heterocyclic compound (D) selected from the group consisting of pyridines, quinolines, isoquinolines and imidazoles and the constituent A.sup.- is the anion radical corresponding to a 2,5-disubstituted-7,7,8,8-tetracyanoquinodimethane (A) of the general formula ##STR1## wherein X is --COOR (R being an alkyl group containing 1-10 carbon atoms) or --CN.

Abstract: A moldable resin composition comprising (1) a saponified ethylene/vinyl acetate copolymer having an ethylene content ranging from 20 to 80 mole % and a saponification degree of not less than 90%, and a polyamide resin containing terminal carboxyl (--COOH) and terminal amide (--CONRR') groups, wherein the number (A) of the terminal carboxyl groups and the number (B) of terminal amide groups satisfies the relationship: ##EQU1## wherein (R) is a hydrocarbyl group of 1 to 22 carbon atoms and R' is a hydrogen atom or a hydrocarbyl group of 1 to 22 carbon atoms.

Abstract: A 2,5-substituted-cyclohexane-1,4-dione of the general formula ##STR1## wherein R.sup.1 and R.sup.2 each is hydrogen or methyl; X is --COOR.sup.3 (R.sup.3 .dbd.H or alkyl), --CONR.sup.4 R.sup.5 (R.sup.4 and R.sup.5 each is hydrogen or alkyl) or --CN and a process for production of the above compound.

Abstract: A thermoplastic resin composition comprising(1) a thermoplastic resin having an ester structure in the main chain and(2) a hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60% by mole and a degree of hydrolysis in the vinyl acetate component of at least 95% by mole, and having an ash content of not more than 20 ppm and an alkali metal content of not more than 5 ppm. The composition of the present invention can give molded articles having excellent properties, and is suitable for use as wrapping or packaging materials and engineering plastics.

Abstract: A process for preparing improved pellets of a hydrolyzed ethylene-vinyl acetate copolymer which comprises extruding a methanol or a water-methanol solution including a hydrolyzed ethylene-vinyl acetate copolymer and a lubricant into a coagulating liquid in the form of a strand and cutting the strand into pellets. According to the process of the present invention, the molding processability can be improved without damaging the properties of the molded articles.

Abstract: An unsaturated polyester resin coating composition comprises (A) 10 to 45 parts by weight of air dryable unsaturated polyester resin comprising a polybasic acid and a polyhydric alcohol, (B) 50 to 70 parts by weight of a filler and (C) 5 to 50 parts by weight of a vinyl monomer, the total amount of the components (A), (B) and (C) being 100 parts by weight; said unsaturated polyester resin (A) having (1) 10 to 50% of units of at least one member selected from the group consisting of cyclopentadiene and dicyclopentadiene and (2) 2 to 40% by units of an acyclic ether having allyl group and hydroxyl group, said % being % by mole based on said polybasic acid. The composition has an improved drying property and provides a coating film having an improved adhesion property to substrates, particularly in the wet state, and also to top coats, and having improved gloss and sharpness, and is particularly useful as a putty.

Abstract: In coating a polyester substrate structure with a solution of a vinyl alcohol resin having a high gas barrier property, the surface of the polyester substrate structure is precoated with a solvent solution of a polyester having the following formulation and an intrinsic viscosity of at least 0.4 and dried to provide an anchor coating layer on said surface.______________________________________ Acid component: Terephthalic acid and/or 90 to 40 mol % isophthalic acid An aliphatic dicarboxylic 10 to 60 mol % acid containing 2 to 12 carbon atoms Diol component: A straight-chain or cyclic 90 to 10 mol % diol containing 2 to 8 carbon atoms A branched diol containing 10 to 90 mol % 3 to 6 carbon atoms ______________________________________The above procedure provides a polyester structure with excellent gas barrier property.

Abstract: A process for producing a molded article comprising a mixture of an olefin resin, which includes a residual chlorine due to a Ziegler type catalyst, a hydrolyzed ethylene-vinyl acetate copolymer and the hydrotalcite compounds having the formula:M.sub.x Al.sub.y (OH).sub.2x+3y-2z (E).sub.z.aH.sub.2 O(wherein "M" is Mg, Ca or Zn, "E" is CO.sub.3 or HPO.sub.4, "x", "y" and "z" are positive numbers and "a" is 0 or a positive number). The hydrotalcite is previously melt-mixed into the olefin resin in a proportion of 1/2z moles per mole of the residual chlorine in the olefin resin to 0.5% by weight based on the olefin resin to give an olefin resin composition, and the mixture of the olefin resin composition is melt-molded with the hydrolyzed ethylene-vinyl acetate copolymer. According to the process, the gel formation can be remarkably reduced, the long run processability can be remarkably increased, and the molded articles having excellent qualities can be obtained.

Abstract: A paper coating composition comprising a polyvinyl alcohol resin containing acetoacetyl group prepared in the presence of a pigment having a pH of not more than 8. The composition of the invention gives heat sensitive recording paper which has increased color density, excellent plasticizer resistance and low adhesiveness to a thermal print head.

Abstract: A desiccating agent comprising a mixture of(A) a deliquescent salt(B) a hydrolyzed copolymer of 50 to 99.8% by mole of vinyl acetate and 50 to 0.2% by mole of an unsaturated dicarboxylic acid in which a degree of hydrolysis of the vinyl acetate component is not less than 70% by mole, and(C) a short cut fibrous materialas main components. The desiccating agent can be reused at least 10 times and has a high hygroscopic power and capacity.

Abstract: A process for continuously hydrolyzing ethylene-vinyl acetate copolymer which comprises feeding a methanol solution in which an ethylene-vinyl acetate copolymer having ethylene of 25 to 50 % by mole into the upper portion of a tower reactor and supplying an alkaline catalyst into the middle portion of the tower, and blowing a methanol vapor into the lower portion of the tower to remove a methyl acetate vapor together with a methanol vapor from the top of the tower and taking out the highly hydrolyzed ethylene-vinyl acetate copolymer from the bottom of the tower, and whereby a highly hydrolyzed ethylene-vinyl acetate copolymer is easily obtained in the presence of a small amount of alkaline catalyst.

Abstract: A process for depositing a salt by applying an electric current or voltage to at least one pair of electrodes placed in a supersaturated aqueous solution or supercooled molten liquid of an inorganic or organic salt, whereby the supersaturation or supercooling can be broken or prevented and the crystallization or solidification of the salt can be efficiently made. The process of the invention is advantageously utilized in an air-conditioning system.