32results about How to "Excellent whitening resistance" patented technology

Provided is an optical pressure-sensitive adhesive sheet having satisfactory colorlessness/transparency, excels in whitening resistance, high-temperature bonding reliability, bump absorptivity, and in workability. The sheet includes a plastic film substrate and, on at least one side thereof, an acrylic pressure-sensitive adhesive layer and has a moisture content of 0.65 percent by weight or more after storage in an environment of 60° C. and 95% RH for 120 hours. The plastic film substrate has a total light transmittance of 88% or more, an internal haze of 1.5% or less, a b* value of −0.5 to 0.5, and a thickness of 12 to 75 μm, the acrylic pressure-sensitive adhesive layer contains an acrylic polymer and has a storage shear modulus at 23° C. of 0.8×10⁵ to 5.0×10⁵ Pa, and the acrylic polymer is formed from, as an essential monomer component, a monomer forming a homopolymer with a glass transition temperature of −10° C. or higher.

The present invention relates to the synthesis method for a PVC resin anti-impact modifier butadiene, styrene, and methyl methacrylate copolymer. The preparation method is that a styrene butadiene polymerization emulsifier is firstly prepared. Then the solid content of electrolyte and latex in the emulsion is adjusted so as to generate styrene-butadiene rubber latex through polymerization reaction, the average particle diameter of which is from 80 to 280 nanometers. Then the prepared styrene-butadiene rubber latex experiences a three-step graft polymerization: the first step is styrene graft, the second ethyl acrylate graft and the last step methyl methacrylate graft. The cross-linking degree of the styrene-butadiene rubber latex is controlled in the styrene butadiene polymerization reaction so as to reduce stress blushing. In the third graft polymerization reaction, grafting agent is introduced in so as to enlarge the coverage of graft monomer on the rubber surface. MBS resin is finally obtained through agglomeration and drying treatment. The MBS resin obtained by the present invention is of good transparency, excellent stress blushing ability and anti-impact capability. The polymerization reaction system of the present invention is stable, which makes the content enhancement of the styrene-butadiene rubber latex possible.

A polypropylene resin composition having excellent whitening resistance and impact resistance according to the present invention contains 75-95 wt% of an ethylene-propylene-alpha olefin random copolymer and 5-25 wt% of an ethylene-propylene block copolymer having an ethylene content of 20-50 wt%, wherein the intrinsic viscosity ratio of the ethylene-propylene-alpha olefin random copolymer to the ethylene-propylene block copolymer is 0.3-1. The polypropylene resin composition is highly effective in whitening resistance and impact resistance.

The invention provides a waterborne polyurethane-acrylate hybrid resin and a preparation method thereof, and application in a leather finishing agent. The preparation method comprises the following steps: mixing and dissolving a diluted monomer and an isocyanate-terminated prepolymer, carrying out a neutralization reaction, carrying out high-speed shearing dispersion to obtain a pre-hybridized emulsion, and adding an initiator into the pre-hybridized emulsion to initiate polymerization, wherein the isocyanate-terminated prepolymer is obtained by mixing and reacting diisocyanate, macromolecularpolyol and a chain extender, and the macromolecular polyol comprises at least one of polyether diol and polyester diol. The waterborne polyurethane-acrylate hybrid resin prepared by the preparation method disclosed by the invention has the advantages that the preparation process is simple and controllable, and the leather finishing agent prepared from the waterborne polyurethane-acrylate hybrid resin is suitable for the field of high-end leather finishing agents, and has the advantages of high weather resistance, smooth hand feeling, good anti-sticking performance, good anti-whitening performance, good filler coating performance, high blackness and good scratch resistance.

The invention belongs to the technical field of building materials, and provides high-water-resistance gypsum-based decorative mortar and a preparation method thereof. The high-water-resistance gypsum-based decorative mortar is prepared by mixing gypsum, aluminate cement, superfine slag powder, latex powder, cellulose ether, a retarder, a defoaming agent, a water repellent, inorganic pigment and quartz sand. During preparation, the gypsum, the aluminate cement and the superfine slag powder are mixed, and then the rest raw materials are added and mixed. The decorative mortar has the advantagesof excellent physical and mechanical properties, controllable setting time and operable time, high softening coefficient, good water resistance, fast strength development, high strength, good bondingstrength, no shrinkage cracking problem, no efflorescence, stain resistance, good decorative effect and the like. The preparation method is simple, is suitable for decoration engineering of building interior walls, is especially suitable for a building wall internal thermal insulation and decoration integrated system, can ensure good performances in a short time, improves the construction efficiency, has excellent long-term use efficiency, and ensures the engineering quality.

The invention belongs to the technical field of chemistry and chemical engineering, and particularly relates to a folding-white free transparent polypropylene material and a preparation method thereof. A polar polypropylene material is prepared from components in parts by weight as follows: 50-100 parts of polypropylene, 5-50 parts of elastomers, 5-30 parts of polar materials, 0.1-1 part of a nucleating agent and 0.5-3 parts of other auxiliaries; a non-polar polypropylene material is prepared from components in parts by weight as follows: 50-100 parts of polypropylene, 5-50 parts of elastomers, 0.1-1 part of an anti-copper agent, 0.1-1 part of a nucleating agent and 0.5-3 parts of other auxiliaries; the raw materials are mixed and added to a double-screw extruder to be extruded and granulated. The polypropylene material is good in flexibility, free of folding white, low in cost and suitable for replacing polypropylene materials in the prior art.

The purpose of the present invention is to provide a polyester film that can, although being a biaxially-drawn polyester film, suppress interference colors when the polyester film is installed in a display such as a liquid crystal display and when the display is visually observed, and that is superior in whitening resistance and dimensional stability when being heated. The polyester film, for optical use, of which retardation at a 50-degree tilt angle with respect to the film surface is not larger than 1500 nm, and of which heat of crystallization for temperature-rise (delta Hc) measured by differential scanning calorimetry (DSC) is not more than 15 J/g.

The invention relates to a thick coating type whitening-resistant waterproof coating and a preparation method thereof. The coating comprises two components and comprises a component A and a component B, wherein the component A comprises the following substances in parts by mass: 30-60 parts of cement, 20-50 parts of filler, 10-40 parts of quartz sand, 0-10 parts of carbohydrates, 0-3 parts of a water reducing agent and 2-8 parts of calcium formate; and the component B comprises the following substances in parts by mass: 70-95 parts of a polymer styrene-acrylic emulsion, 2-8 parts of a polymer VAE emulsion, 0-1 part of a thickening agent, 1-7 parts of a defoaming agent, 0-4 parts of a bactericide and 50-200 parts of water. The waterproof coating disclosed by the invention is prepared by uniformly stirring and mixing the weighed substances of the component A and the component B according to the required proportion; when the double-component waterproof paint is applied in a thick-coating manner, the phenomenon that the surface of a coating is whitened is avoided, the double-component waterproof paint is high in adhesive force with a base layer, and the double-component waterproof paint has good physical and mechanical properties and an anti-whitening effect.

The invention discloses polyaspartic acid ester craft paint and a preparation method and application thereof. The polyaspartic acid ester craft paint is prepared from, in parts by weight, a main agentand a hardening agent, wherein a ratio of the main agent to the hardening agent is 100 to (60 to 80). The polyaspartic acid ester craft paint has protective and decorative effects on wood and plasticbase materials, and film has excellent ageing-resistant performance so that product use time can be greatly prolonged; the paint has the characteristic of low VOC emission, so that the national environmental-protection requirements are met; the film has the characteristic of high drying speed so that a production man-hour can be saved; the paint has extra-high construction adaptability; the filmhas certain wear resistance and elasticity so that scratches and collision in a transportation process can be reduced; the film has good image distinctness and richness, so that a workpiece is attractive as a whole.

The invention provides a thermal insulation coating. The thermal insulation coating is prepared from components in parts by weight as follows: 90 parts of magnesium carbonate, 10 parts of mica powder,10 parts of cellulose, 10 parts of phosphor, 10 parts of vitrified calcium, 4 parts of bentonite, 15 parts of rubber powder, 5 parts of benzoin powder, 5 parts of a brightener, 15 parts of ceramic microspheres and 20 parts of paraffin alkane. The thermal insulation coating is high in hardness and not prone to cracking and peeling, the added benzoin powder can refresh mind and induce resuscitation, the added brightener has good whitening resistance, and the thermal insulation effect is good.

The invention relates to a preparation method of a reflecting film. The method comprises the following steps of: providing a mixture which comprises pore-forming particles and a matrix; coating the mixture on the surface of a substrate to form an isolation layer on the surface of the substrate; and carrying out heating treatment on the substrate coated with the mixture to decompose the pore-forming particles to release gas so as to form a plurality of cells, and meanwhile, enabling parts of the cells to protrude from the surface of the isolation layer so as to form a plurality of convex part structures, thus obtaining the reflecting film. The invention also provides the reflecting film.

The invention provides water-spot-resistant and whitening-resistant polyester resin as well as a preparation method and application thereof. The water-spot-resistant and whitening-resistant polyester resin is prepared from the following raw materials: 4.0 to 4.5 parts of dihydric alcohol, 0.02 to 0.1 part of trihydric alcohol, 5.7 to 6.2 parts of dibasic acid, 0.008 to 0.012 part of esterification catalyst, 0.9 to 1.4 parts of primary end-capping reagent, 0.1 to 0.3 part of secondary end-capping reagent and 0.02 to 0.1 part of antioxidant. According to the invention, secondary end capping and secondary vacuum processes are adopted, the hydroxyl content is reduced to be within 3mgKOH/g, the prepared polyester resin is applied to powder coating, no water spot exists after a dark coating is boiled in water for 2 hours, and the gloss retention rate is greater than 70%; the coating is detected by adopting an anti-whitening performance detection method, the gloss retention rate is greater than 88%, the color difference change is less than 1.5, and the coating has excellent water spot resistance and whitening resistance.