Abstract: The present invention is a method of preparing an acrylic copolymer having an acid anhydride group with a number average molecular weight of 1,500-5,000 comprising; polymerizing a monomer mixture of a radical polymerizable monomer having an acid anhydride group and another radical polymerizable monomer at a temperature of 150° C. or higher by using a radical initiator, wherein the concentration of the monomer mixture is 50-75 wt %. This method can provide an acrylic copolymer having an acid anhydride group with a relatively low molecular weight that does not cause the problem of yellowing after baking when used in an acid/epoxy curing type clear paint, by means of high temperature polymerization without the use of a large amount of an expensive initiator.

Abstract: The present invention is a method of preparing an acrylic copolymer using as a raw material a monomer mixture comprising 50 mole % or more of a monomer having a polymerizable double bond formed by a carbon atom to which no hydrogen atom is bonded and a carbon atom to which a hydrogen atom is bonded, wherein after the polymerization is carried out at a polymerization temperature of 150° C. or higher, further heating at 80-130° C. is done.

Abstract: The present invention is a method of preparing an acrylic copolymer having an acid anhydride group with a number average molecular weight of 1,500-5,000 comprising;

Abstract: Disclosed is a photosensitive composition for volume hologram recording which is used for recording an interference fringe produced by a laser beam or a light having excellent coherence, as fringes having different refractive index. The composition comprising:(a) a cationic polymerizable compound which is liquid at ambient temperature;(b) a radical polymerizable compound;(c) a radical photopolymerization initiator composition sensitized by a laser beam or a light having excellent coherence which has a specific wavelength to polymerize the ingredient (b); and(d) a cationic photopolymerization initiator composition which shows low photosensitivity to the light having a specific wavelength and is sensitized by a light having the other wavelength to polymerize the ingredient (a), wherein an average refractive index of the ingredient (a) is smaller than that of the ingredient (b). A process for producing the photosensitive composition is also disclosed.

Abstract: A novel acrylic monomer is produced by addition reacting a hydroxyalkyl (meth)acrylate or its lactone adduct with a cyclic alkylene carbonate, and then acylating the terminal hydroxyl group of the reaction product with a reactive derivative of a monobasic alkanoic acid or a dicarboxylic acid anhydride.

Abstract: A coating protective film which comprises a substrate, which is made of a colored polyolefin film and has a maximum per cent transmission of ultraviolet within a wavelength range of 190 to 370 nm of not more than 10%, and a pressure sensitive adhesive layer, which is made of a pressure sensitive adhesive containing as the main component at least one of polyisobutylene, butyl rubber and polybutene, satisfies the requirements for weatherability of protective pressure sensitive adhesive film which is temporarily attached to finished automobiles for the purposes of protection of automotive coating during transfer and storage, and is also so excellent in peelability as not to pollute the coating on the automobiles.

Abstract: Thermosetting resin particles having a narrow particle size distribution useful for powder coating application are produced by the steps of (a) providing a first water-soluble polymer having a cloud point within the range between 30.degree. C. and 90.degree. C. and a second water-soluble polymer not having any cloud point; (b) preparing an aqueous suspension in which an organic solvent-containing, liquid thermosetting resin composition is suspended as primary particles of oil droplets in an aqueous suspension medium containing the first and second water-soluble polymers, (c) heating the suspension to a temperature higher than the cloudy point to allow the oil droplets to agglomerate into secondary particles of larger particle sizes, (d) removing the organic solvent contained in the particles during or after step (c) and optionally (e) recovering the particles.

Abstract: A waterborne paint is provided by dissolving or dispersing a polyester resin and a crosslinker in an aqueous medium containing a base. The polyester resin contains a hydroxy-terminated polyalkadienediol having an average degree of polymerization from 5 to 50, a hydrogenated product thereof or a mixture thereof in a proportion from 1 to 30% by weight of the entire polyester-forming reactants, and has an acid number from 5 to 150, a hydroxyl number from 30 to 250. The paint is useful for forming a multilayer coating film on automobile bodies by applying the paint between an electrodeposition coating layer and a top coating layer.

Abstract: The present invention provides the near infrared polymerizable composition which has high sensitivity sufficient to provide excellent curability to the coating composition containing the same, even if the coating composition contains the pigment as well. The present invention provides a near infrared polymerizable composition comprising a cyanine dye, a S-triazine compound, an organoboron salt and an ethylenically unsaturated compound.

Abstract: Disclosed is a photosensitive composition for volume hologram recording which is used for recording an interference fringe produced by a laser beam or a light having excellent coherence, as fringes having different refractive index. The composition comprising:(a) a cationic polymerizable compound which is liquid at ambient temperature;(b) a radical polymerizable compound;(c) a radical photopolymerization initiator composition sensitized by a laser beam or a light having excellent coherence which has a specific wavelength to polymerize the ingredient (b); and(d) a cationic photopolymerization initiator composition which shows low photosensitivity to the light having a specific wavelength and is sensitized by a light having the other wavelength to polymerize the ingredient (a), wherein an average refractive index of the ingredient (a) is smaller than that of the ingredient (b). A process for producing the photosensitive composition is also disclosed.

Abstract: Polyglycidyl epoxy resins are modified to have a blocked isocyanate moiety bound to the resin backbone through an oxazolidone ring by reacting the epoxy resin with an asymmetrically blocked diisocyanate. Further reaction with a cationic active hydrogen compound gives a modified epoxy resin having a cationic group in addition to the blocked isocyanate moieties. The modified epoxy resins are incorporated into cathodic electrodeposition paint as a crosslinker or cationic binder resin or pigment dispersing agent.

Abstract: Disclosed is a process for preparing a colored polymer without color change between a reactant color dye and an obtained polymer. The process of the present invention comprises polymerizing a vinyl polymerizable monomer (A), and a polymerizable dye (B) prepared by reacting a (meth)acryloyl compound having a group reactive with an active hydrogen, with a dye represented by the formula: ##STR1## wherein R.sub.1 and R.sub.2, which are the same or different, show a hydrogen atom or a group having the formula; ##STR2## (R.sub.3 represents --(CH.sub.2)m-NH.sub.2, or --(CH.sub.2)m-OH, R.sub.4 represents a hydrogen atom, an alkyl group, a cycloalkyl group or an allyl group, n is an integer of 1 to 5 and m is 0 or an integer of 1 to 5), provided that both R.sub.1 and R.sub.2 do not represents a hydrogen atom, X and Y, which are different, --OH or --NHR.sub.1,in the presence of a polymerization initiator, and a color difference between the polymerizable dye and the obtained colored vinyl polymer is within .+-.

Abstract: Polyoxyalkylene polyamine or aromatic diamines or xylylenediamines are modified by them to the Michael reaction with an ethylenically unsaturated monomer having an electron-withdrawing group to convert the primary amino groups at least in part to a secondary amino group of the formula:--NH--CH.sub.2 --CH(R)--Ywherein R is a hydrogen atom or methyl, and Y is an electron-withdrawing group. The modified amines find use in the manufacture of plastics such as polyurea elastomers or polyurea RIM.

Abstract: A curable resin composition containing (a) a polymer having a plurality of alkenyl groups, (b) an organohydrogenpolysiloxane having a plurality of hydrosilyl groups, (c) a polymer having a plurality of alkynyl groups, and (d) a hydrosilylation catalyst is disclosed. The composition is stable at room temperature but curable at an elevated temperature.

Abstract: An antifouling paint containing a copolymer including a recurring unit of the formula: ##STR1## wherein R.sup.1 is hydrogen atom, methyl or an alkoxycarbonyl, R.sup.2 is hydrogen atom or an alkoxycarbonyl, A is an acid ion-terminated pendant group, M is a transitional metal ion, L is a monobasic organic acid ion, and m is the valency of the transitional metal M; and an amount of an organic ligand capable of coordinating to the transitional metal. The ion-association and reactivity of the metal in the copolymer may be retarded by complexing with the organic ligand in situ.

Abstract: A polyurea resin molding composition for reaction injection molding use which comprises (a) a polyoxyalkylenepolyamine, (b) an aromatic polyamine and/or a xylylenediamine and (c) a polyisocyanate, wherein either one or both of components (a) and (b) have been modified by a Michael reaction with an unsaturated compound of the formula CH.sub.2 .dbd.C(R)--Y wherein R is H or CH.sub.3 and Y is an electron attracting group. The use of such modified polyamine(s) improves in-mold flow and green strength characteristics.

Abstract: An air-drying paint composition comprising (a) internally cross-linked polymer microparticles produced by emulsion polymerizing ethylenically unsaturated monomers including at least one cross-linking monomer, (b) a film-forming resin selected from the group consisting of an air-drying alkyd resin, an acrylic polymer and an acrylic-modified alkyd resin, and (c) a volatile organic solvent. The paint may be formulated in high solids content while retaining low viscosity.

Abstract: An aqueous surface treatment composition for forming a hydrophilic coating comprising: (a) alkali metal silicate, (b) aminoalcohol, and (c) a water-soluble resin selected from the group consisting of a water-soluble nylon, a natural polysaccharide and a water-soluble, natural protein, and/or a water-soluble silane coupling agent. This aqueous surface treatment composition is used to form a hydrophilic coating on an aluminum surface having a corrosion-resistant coating layer. The hydrophilic coating prepared from this compositon has good hydrophilic nature and corrosion resistance with substantially no unacceptable odor.

Abstract: A modified polyester resin composition for coating use comprising a polyester resin modified with 5 to 30% by weight of the total solid of a branched fatty acid having 8 and more carbon atoms and with 5 to 30% by weight of the total solid of a cyclic ester represented by the formula: ##STR1## wherein R represents an alkylene group having 4 to 10 carbon atoms, the resin having a hydroxyl value of 70 to 300. The present resin composition is specifically useful as resinous vehicle in a top coat composition for plastic and other substrates.

Abstract: An acrylic resin composition for use in high solids paints which consists essentially of an acrylic copolymer having a number average molecular weight of 500 to 5000 and being prepared by subjecting a mixture of 30 to 88 weight % of an alkyl (meth)acrylate, 2 to 60 weight % of 2,4-diphenyl-4-methyl-1-pentene, 10 to 40 weight % of a hydroxy bearing ethylenically unsaturated monomer, 0 to 10 weight % of an ethylenic unsaturated acid and 0 to 30 weight % of other copolymerizable monomer(s) to a polymerization with one or more radical initiators. Such high solids paint containing such copolymers can produce coatings with excellent weather resistance, water resistance, scratch resistance and good appearance.