Abstract: Method and apparatus for the surface-hardening treatment of a synthetic resin shaped article is provided, wherein the shaped article is dipped in a surface-hardening solution; the shaped article is gradually pulled up therefrom thereby to be coated with the surface-hardening solution; and the coated article is irradiated with ultraviolet rays to cure the coating. The shaped article is dipped in succession in a washing tank, a drying tank having warm water or an organic solvent and a hardening solution tank while the shaped article is conveyed by a first conveyor, and then, the shaped article is transferred from the first conveyor through an intermediate conveyor to a second conveyor whereby the shaped article is conveyed to an ultraviolet ray-curing step.

Abstract: A dip-coating method for forming a smooth coated film on the surface of an article by dipping the article in a coating solution while making ultrasonic waves act on the coating solution and forming a uniform liquid flow on the surface of the coating solution. An apparatus for practicing the method is also disclosed.

Abstract: A shaped article of synthetic resins, such as polydiethylene glycol bisallylcarbonate, is coated with the following coating composition and then irradiated with ultraviolet rays, whereby the coating composition deposited on the shaped article is cured to form a coating film having an excellent abrasion resistance, surface smoothness, adhesion to the substrate resin, flexibility, heat resistance, solvent resistance and durability. The coating composition comprised of (a) a mixture of, based on the weight of the mixture, (i) 25-99.95 wt. % of at least one polyfunctional monomer having at least three acryloyloxy or methacryloyloxy groups, (ii) 0-50 wt. % of at least one mono- or bi-functional monomer having one or two polymerizable unsaturated groups and (iii) 0.05-25 wt. % of at least one organic acid which has at least one halogen substituent (fluorine, chlorine or bromine) and which is liquid at normal temperature and pressure, and (b) 0.01-10 wt. parts, based on 100 wt.

Abstract: A coating composition for the preparation of synthetic resin shaped articles excellent in abrasion resistance and weatherability is described. This composition comprises (a) a polyfunctional monomer mixture comprising (i) 25-75 wt. % of at least one polyfunctional monomer of the formula (I): ##STR1## wherein at least three of X.sub.11, X.sub.12, X.sub.13, X.sub.22, X.sub.23 -X.sub.n2, X.sub.n3 and X.sub.14 are CH.sub.2 .dbd.CH.C00-- and the remaining groups are --OH, and n is an integer of 1-5, (ii) 25-75 wt. % of at least one polyfunctional monomer of the formula (II): ##STR2## wherein at least three of the R groups are CH.sub.2 .dbd.CH COO-- and each of the remaining is H or --OH, n.sub.1, n.sub.2, n.sub.3, n.sub.4, m.sub.1, m.sub.2, m.sub.3 and m.sub.4 are integers of 0, 1 or 2, and X is an integer of 1 to 10 and (iii) 0 to 50 wt. % of a monomer containing one acryloyloxy group and having a boiling point of at least 150.degree. C. at normal pressure and a viscosity of not higher than 20 cps/20.degree. C.

Abstract: A dip-coating method for forming a smooth coated film on the surface of an article by dipping the article in a coating solution while making ultrasonic waves act on the coating solution and forming a uniform liquid flow on the surface of the coating solution. An apparatus for practicing the method is also disclosed.

Abstract: A coating composition comprising a polyfunctional monomer (a) having at least 3 (meth)acryloyloxy groups, a (meth)acrylic acid mono or diester of polyethyleneglycol (b), a sulfonic acid (c), a phosphoric acid ester (d), an ethanolamine (e), organic solvent, and a photosensitizer.

Abstract: A coating composition for the preparation of synthetic resin shaped articles excellent in abrasion resistance and weatherability is described. This composition comprises (a) a polyfunctional monomer composition comprising (i) 40-100 wt. % of a polyfunctional monomer containing at least three methacryloyloxy or acryloyloxy groups in the molecule and having a MW of not higher than about 900 and (ii) 0-60 wt. % of a mono- or bi-functional monomer having one or two methacryloyloxy or acryloyloxy groups in the molecule and having a MW of not higher than about 300 per methacryloyloxy or acryloyloxy group, (b) 5-35 parts by wt., based on 100 wt. parts of the monomer composition, of at least one ultraviolet absorber, (c) 0.5-8 wt. parts, based on 100 parts by wt. of the monomer composition, of at least one polymeric material selected from polymers of alkyl methacrylates and alkyl acrylates, and (d) 0.01-6 parts by wt., based on 100 parts by wt. of the monomer composition, of a photosensitizer.

Abstract: A process for producing a shaped resin article having a mat surface is disclosed.In the process, a shaped resin article is coated with an acrylic coating composition comprised of a (meth)acrylic acid ester polymer, a polyfunctional monomer containing at least two (meth)acryloyloxy groups in one molecule and, if necessary, an organic solvent, irradiated with ultraviolet rays, and then treated with a treating agent.

Abstract: Coating compositions comprising a polyfunctional monomer of a mono or polypentaerythritol poly(meth)acrylate, a bifunctional (meth)acrylate having specific monomer structure, an additional (meth)acrylate containing not more than 2 (meth)acryloyloxy groups, a phosphoric acid ester and an ethanolamine all blended together in a suitable organic solvent system together with a photosensitizer are disclosed. The compositions provide a scratch-resistant, hard cross-linked film surface that is dyeable and resists static and fogging to a synthetic resin article, such as polymethyl methacrylate, to which they are applied.

Abstract: A coating composition comprising a monomer mixture of mono- or polypentaerythritol hving at least three (meth) acryloyloxy groups and at least one monofunctional acrylate or methacrylate having at least one ether bond in the molecule, a boiling point above 150.degree. C. under normal pressure and a viscosity below 20 centipoises at 20.degree. C., a photosensitizing agent, at least one silicon containing surface active agent and at least one organic solvent capable of forming a uniform solution upon mixing with the vinyl monomer mixture. Also disclosed is a process of coating surfaces with the coating compositions.

Abstract: A coating composition comprising a polyfunctional monomer (a) having at least 3 (meth)acryloyloxy groups, a (meth)acrylic acid mono or diester of polyethyleneglycol (b), a sulfonic acid (c), a phosphoric acid ester (d), an ethanolamine (e), organic solvent, and a photosensitizer.

Abstract: This invention relates to a coating composition which comprises a polyfunctional monomer having at least three acryloyloxy groups and/or methacryloyloxy groups in one molecule, a monomer having not more than two acryloyloxy groups and/or methacryloyloxy groups in one molecule and optionally photosensitizer and which can form a crosslink-hardened film excellent in abrasion resistance upon curing by irradiation with actinic radiation in air and a method for producing a synthetic resin molded product having an abrasion resistant surface.

Abstract: This invention relates to a coating composition which comprises a polyfunctional monomer having at least three acryloyloxy groups and/or methacryloyloxy groups in one molecule, a monomer having not more than two acryloyloxy groups, and/or methacryloyloxy groups in one molecule and optionally a photosensitizer and which can form a crosslink-hardened film excellent in abrasion resistance upon curing by irradiation with actinic radiation in air and a method for producing a synthetic resin molded product having an abrasion resistant surface.

Abstract: This invention relates to a coating composition which comprises a polyfunctional monomer having at least three acryloyloxy groups and/or methacryloyloxy groups in one molecule, a monomer having not more than two acryloyloxy group and/or methacryloyloxy groups in one molecule and optionally a photosensitizer and which can form a crosslink-hardened film excellent in abrasion resistance upon curing by irradiation with actinic radiation in air and a method for producing a synthetic resin molded product having an abrasion resistant surface.