297 results about "Ultraviolet absorbance" patented technology

A coating composition excellent in storage stability, excellent in coating appearance, adhesion and weather resistance, high in hardness, having ultraviolet absorbing ability, and capable of preventing deterioration of a ground or a substrate, which comprises (A) a polymer containing (a1) a silyl group having a silicon atom bound to a hydrolytic group and/or a hydroxyl group, (a2) a group having ultraviolet absorbing ability and (a3) a group having ultraviolet stability in the same polymer chain, and further optionally comprises (B) at least one component selected from the group consisting of an organosilane represented by (R1)nSi(OR2)4-n, a hydrolyzate of the organosilane and a condensate of the organosilane; and a cured product thereof.

A primer composition comprising (A) a vinyl polymer having hydrolyzable silyl groups and/or SiOH groups and organic UV-absorbing groups and (B) an organopolysiloxane cures into a primer layer having a coefficient of linear expansion equal to or less than 150×10⁻⁶/° C., which allows a polysiloxane hard coat to be applied thereon.

A primer composition comprises (A) a vinyl copolymer obtained through copolymerization of (a-1) a UV-absorbing vinyl monomer, (a-2) an alkoxysilyl group-containing vinyl monomer, and (a-3) another copolymerizable monomer, (B) a curing agent, and (C) a thermoplastic vinyl resin having a Tg of at least 80° C. Polycarbonate resin articles, when covered with an undercoat of the primer composition and an overcoat of an organopolysiloxane composition, exhibit improved transparency, mar resistance, weather resistance, and chemical resistance and find outdoor use as vehicle and building windows and windshields.

Provided are a method for manufacturing a liquid crystal alignment film for enabling highly efficient anisotropy to be introduced into a film without rubbing, as well as a liquid crystal alignment film and a liquid crystal display element. A method for manufacturing a liquid crystal alignment film having [I] a step for forming, on a substrate, a photosensitive side-chain polymer film exhibiting liquid crystal properties in a predetermined temperature range, [II] a step for irradiating polarized ultraviolet rays to the side-chain polymer film, and [III] a step for heating the side-chain polymer film irradiated with the ultraviolet rays, the method being characterized in that the amount of irradiated ultraviolet rays in step [II] is within 1%-70% of the amount of irradiated ultraviolet rays that maximizes the difference [increment]A between the ultraviolet absorbance in the direction parallel to the polarization direction of the polarized ultraviolet rays and the ultraviolet absorbance in the direction perpendicular thereto in the side-chain polymer film.

The invention relates to anti-ultraviolet anti-sunburn nano elemental fabric body-building protective clothes belonging to the technical field of functional healthy fabrics clothing production. The parts, i.e. exposed skin, a face, a neck, limbs, and the like, of a sailor, a shipman and a yardman who have maximum body injury caused by long-time solar radiation have obvious dryness, coarseness, desquamation, chromatosis, analosis, wrinkles and inelasticity and even have cancerization caused by sunlight. In the invention, rich and overall honey series mixtures, i.e. trace element vitamins and the like, are added to fiber production spinning solutions, i.e. the traditional ultraviolet absorption conditioner JCJ-966 and CJ-939 and the like; nano selenium and germanium closely contact with a work clothes through human body skin so as to continuously release the trace elements and nutrient substances into a human body and sufficiently regulate, supplement and antagonize internal element balance and enhance the immunity and the resistance. Thus the anti-ultraviolet anti-sunburn nano elemental fabric body-building protective clothes achieves the purposes of body building and cancer prevention.

The invention discloses a manufacturing method of a nanometer thermal insulation material of automobile glass. The nanometer material mainly comprises the following components according to content percentage: 50-70% of nanometer modified organic silica solution, 5-10% of nanometer oxidized silica solution, 5-15% of nanometer indium tin oxide size, 10-20% of organic solvent and 1-5% of film forming substances, and the total percentage of all the components is 100%. By adopting the method, the nanometer size with the function of thermal insulation forms a film on the inner surface of the automobile glass through an organic silicon carrier, so that the glass has the function of thermal insulation, as well as very high visible light transmission, an excellent infrared rejection rate, an excellent ultraviolet absorption rate, prominent adhesion and ultrahigh film hardness.

Methods of forming UV-absorbent transparent coatings and transparent substrates coated with the same allow for a relatively lower temperature cross-linkage reaction between a UV-absorbent compound and an epoxy-alkoxysilane. More specifically, UV-absorbent coatings on transparent substrates are formed by prepolymerizing a mixture consisting essentially of a benzophenone, an epoxy alkoxysilane and an organic catalyst at a temperature of between about 40° C. to about 130° C. and for a time sufficient such that between about 30% to about 70% of the epoxy alkoxysilane has been converted to a ring-opened oligomer or polymer. Such prepolymerized mixture may then be hydrolyzed and coated onto the surface of a transparent substrate, and thereafter cured at a temperature of less than about 200° C. for a time sufficient to cross-link the hydrolyzed alkoxysilane with itself and the glass surface. Most preferably, the prepolymerized mixture is hydrolyzed prior to being coated onto the substrate in an acidic alcoholic solution. Preferred for use in the present invention as a UV-absorbent compound is tetrahydroxybenzophenone. The preferred epoxy alkoxysilane is 3-glycidoxypropyl trimethoxysilane. It is especially preferred that prepolymerization be effected in the presence of an organic catalyst, such as triethylamine (TEA).

Disclosed herein are compositions of metal oxide nanoparticles having regular polyhedral nanocavities, where the metal oxide can be titania, and where the nanoparticles be nanorods. Also disclosed are titania nanoparticles with nanocavities that are doped with dopants. Methods of making metal oxide nanoparticles with nanocavities are also disclosed. Also disclosed are ultraviolet-blocking compositions including metal oxide nanoparticles with nanocavities, as well as methods of enhancing ultraviolet absorbance efficiency of an ultraviolet blocking composition. Additional uses of metal oxide nanoparticles with nanocavities include solar energy conversion systems and lithium-ion batteries.

The invention discloses an ultraviolet-resistant laundry emulsion, which comprises the following parts: 5%-15% aliphatic alcohol polyoxyethylene ether sodium sulfate, 2%-25% alkyl glycoside, 4%-18% alcohol ether carboxylate, 3%-38% coconut oil diglycollic amide, 2 %-36% sulfonate olefin, 0.5%-1.5% thickener, 2.5%-5% compliance agent and 0.5%-2.5% sun-screening agent with certain technical allocation. The invention can adsorb most of ultraviolet on the cloth, which improves the ultraviolet-resistant effect of textile effectively.

The invention belongs to the technical field of macromolecule protective films, and particularly relates to a polyester base film for a window film and a manufacturing technology of the polyester base film. The polyester base film is a thin film of a three-layer structure, the sandwich layer is a tearing resistance layer, and a high-barrier layer and an uvioresistant layer are arranged on the two sides of the sandwich layer. The tearing resistance layer is prepared from, by weight, 10%-15% of polyethylene glycol terephthalate-1,4-cyclohexane 2 methyl alcohol ester (PETG) and 85%-90% of optical grade PET polyester chips. The high-barrier layer is prepared from, by weight, 0.2%-0.35% of SO<2> particles and 99.65%-99.8% of poly naphthalene two formic acid glycol ester (PEN). The uvioresistant layer is prepared from, by weight, 3%-5% of ultraviolet ray absorption master batch and 95%-97% of optical grade PET polyester chips. The polyester base film can isolate ultraviolet rays, oxygen and vapor and prolong the service life of the window film, and has the advantages of being good in tearing resistance performance and optical performance. The invention provides a window film manufacturing technology which is easy to operate and low in cost.