Mitsubishi Rayon Company, Limited

Misao Tamura

Isao Sasaki

Kazuo Kishida

Kenji Kushi

Hiroshi Fukushima

Suehiro Tayama

Tsukasa Mizobuchi

Osamu Takemoto

Katsumi Yonekura

Takaji Kawaguchi

A coating composition forming a abrasion resistant coating comprising (A) an ultraviolet-curable silicone prepared by chemically modifying particulate colloidal silica with a specific silane compound, (B) a monomer mixture comprising a (meth)acrylate having a specific isocyanate skeleton and a urethane poly(meth)acrylate having an alicyclic skeleton, and (C) a photo-polymerization initiator. By using a urethane poly(meth)acrylate having an alicyclic skeleton as part of the component (B) and the component (A) having an enhanced reactivity of chemical modification, the compatibility of the component (A) with the component (B) is improved to give a cured coating with excellent wear resistance, weather resistance and durability.

Coating composition forming wear-resistant coat and article covered with the coat

Disclosed is a process for preparing a UV-curable coating material comprising the steps of effecting a hydrolysis reaction of (a-1) 40 to 90 parts by weight of colloidal silica, and (a-2) 60 to 10 parts by weight of a hydrolyzate of an alkoxy silane compound containing not less than 50% by weight of a compound of the formula (I) ##STR1## replacing the dispersion medium of the colloidal silica with a nonpolar solvent when the amount of dehydration is in the range of 50 to 90% of theoretical value; and effecting a further condensation reaction while maintaining in the state of 30 to 90% by weight of solid components in the presence of the nonpolar solvent. A coating composition containing the UV-curable coating material can form an anti-abrasion-coating film having excellent abrasion resistance, surface smoothness, thermal resistance, chemical resistance, durability, weather resistance and adhesion to the substrate.

Process for preparing a UV-curable coating material and anti-abrasion

Disclosed is a coating composition comprising (A) 5 to 60 parts by weight, on a solid basis, of colloidal silica, (B) 5 to 70 parts by weight of a hydrolyzate and/or hydrolyzed and partially condensed product of a compound of the general formula ##STR1## (C) 10 to 80 parts by weight of a polyfunctional monomer containing a monomer of the general formula ##STR2## and (D) 0.01 to 5 parts by weight of a photopolymerization initiator containing a compound of the general formula ##STR3## provided that the combined amount of components (A), (B), (C) and (D) is 100 parts by weight. This coating composition can be cured in air by exposure to ultraviolet light, and the resulting cured film is excellent in various properties (such as abrasion resistance) and adhesion to the substrate.

Process for producing abrasion-resistant synthetic resin molded articles

Disclosed is a coating composition comprising

Coating composition and process for producing abrasion-resistant

Disclosed is a coating composition comprising (A) 10 to 70 parts by weight of a poly(meth)acrylate of mono- or polypentaerythritol, (B) 5 to 50 parts by weight of a urethane poly(meth)acrylate having at least two unsaturated double bonds in the molecule, (C) 5 to 50 parts by weight of a poly[(meth)acryloyloxyalkyl] (iso)cyanurate, (D) 2 to 30 parts by weight of an ultraviolet absorber, (E) 0.1 to 10 parts by weight of a photopolymerization initiator, and (F) 0.1 to 5 parts by weight of a hindered amine type light stabilizer, provided that the combined amount of components (A) to (F) is 100 parts by weight. This coating composition can form a crosslinked and cured film having excellent abrasion resistance, surface smoothness, thermal resistance, chemical resistance, durability, weather resistance and adhesion to the substrate.

Coating composition

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. parts of said mixture, of a photosensitizer. The coating composition may contain 0.05-25 wt. % of at least one compound having an acrylamide or methacrylamide group and a hydroxyl group or groups.

Coating composition and process for preparing synthetic resin shaped

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., and (b) 0.01-6.0 wt. parts, based on 100 wt. parts of the polyfunctional monomer mixture, of at least one photosensitizer. The coating composition is coated on a synthetic resin shaped article and then, irradiated with utraviolet rays in air to form a crosslinked coating film having a thickness of 1-30 microns.

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. The coating composition is coated on a synthetic resin shaped article and then, irradiated with ultraviolet rays in an inert gas or air to form a crosslinked coating film having a thickness of 1 to 30 microns.

Growing community of inventors

Aichi, Japan

Misao Tamura