68results about How to "Good stone chip resistance" patented technology

The invention relates to a preparation method of high-reaction-activity hydroxyl acrylic resin. According to the invention, a solvent in a reactor is heated to a preset temperature under the protection of an inert gas; a mixture of a monomer component A with hard monomer as a main component (and comprising a small amount of soft monomer, hydroxyl monomer and carboxyl monomer) and an initiation agent is slowly added; a reaction is carried out for a certain period of time with maintained temperature; a mixture of a monomer component B with soft monomer as a main component (and comprising a small amount of hard monomer, hydroxyl monomer and carboxyl monomer) and an initiation agent is slowly added; and reaction is carried out for a certain period of time with maintained temperature, such that acrylic resin comprising hydroxyl is obtained. The invention has the characteristic that common monomers are adopted, and only the synthesis process is changed wherein monomer dropping sequence is changed, such that resin molecular structure is substantially changed, and the synthesized hydroxyl acrylic resin shows high reaction activity during a curing reaction. The method provided by the invention also has the advantages of low cost, simple process, and suitability for industrialized productions.

The invention discloses a making method of scraping-proof, stone-impacting resistant aqueous nanometer automobile paint in the chemical paint making technical domain, which comprises the following parts: 60-70% paint filming base, 5-15% nanometer powder, 20-25% solvent water and 0.5-1.0% adjuvant, wherein the adjuvant contains thickener, dispersant, defoamer and filming agent; the weight rate of crosslinking agent and nanometer emulsion is 0.9:1-1:1; the crosslinking agent is chemical material of melamine type; the scraping-proof index of paint layer can be 96-99% (displayed by glass keeping rate).

A waterborne automobile coating composition is provided. The composition is prepared from, by weight, 20-60 parts of a waterborne polyurethane dispersoid, 1.0-3.5 parts of a dispersing agent, 5-15 parts of titanium dioxide, 5-15 parts of precipitated barium sulfate, 0.1-0.5 part of carbon black, 0.5-1.5 parts of a defoamer, 3-8 parts of a waterborne hydroxy acrylic acid dispersoid, 0.1-0.5 part of an organic amine, 6-12 parts of amino resin, 0.1-1 part of a substrate wetting agent, 1-3 parts of an explosion-proof auxiliary agent, 1-5 parts of a cosolvent, 20-40 parts of deionized water and 0.1-1 part of a thickening agent. The waterborne polyurethane dispersoid is a compound of a polycarbonate-type waterborne polyurethane dispersoid having hydroxy groups and a polyester-type waterborne polyurethane dispersoid preferably. The coating composition has excellent resistance to rock crash, and can meet requirements on an automobile coating process including three times of coating and one time of baking, namely a 3C1B process, in the field of environment protection.

The invention provides the preparation method of a water intermediate coating suitable for automobile factories and repair. The coating prepared by the method is universally suitable for automobile factories and repair. The preparation method comprises the following steps and process conditions: (1) synthesizing water-dispersible resin; (2) modifying hydrophilic polyisocyanate; (3) preparing the intermediate coating for automobile factories and repair; and (4) mixing the intermediate coating prepared in step (3) with the hydrophilic end-terminated polyisocyanate synthesized in step (2) to obtain the final product. The prepared intermediate coating has high applicability and is suitable for factory manufacturing and for repair. The intermediate coating is very friendly to the environment and greatly reduces the use of and the dependence on organic solvent, thus effectively conserving the energy resources. Additionally, the coating has the advantages of excellent flexibility, particularly high chip resistance and water resistance, smooth and fine coating surface and excellent interlayer adhesive force with the prime coat and the top coat.

The invention discloses a primer surfacer for automobiles. The primer surfacer comprises a component A and a component B. The component A comprises the following raw materials by weight: 10-20 parts of a waterborne polyurethane dispersion, 12-23 parts of polyester resin, 5-15 parts of acrylic modified polyurethane, 2-8 parts of an acrylic emulsion, 5-8 parts of acrylic resin, etc.; and the component B is a curing agent, and the weight ratio of the component A to the component B is (6-10):1. The invention also provides a preparation method and application of the primer surfacer. The primer surfacer disclosed by the invention has the characteristics that the primer surface can meet wet-to-wet construction process and the coating film can be baked and cured at a low temperature (60-100DEG C),and also has excellent adhesive force, stone impact resistance, wear resistance, chemical resistance and other physical and chemical properties while having good construction performance and coatingfilm appearance.

The invention provides a high-crack-resistance damping coating. The high-crack-resistance damping coating comprises the following raw materials in parts by weight: 290 to 310 parts of an acrylic acid waterproof emulsion, 95 t 105 parts of an anti-rust emulsion, 45 to 55 parts of a plasticized acrylic acid emulsion, 13 to 17 parts of a film-forming aid, 90 to 110 parts of functional fillers and 45 to 55 parts of corrosion-resistant fillers. The damping coating has high flexibility, impact resistance and high stone crash resistance, and solves the problem that the profile 90-degree transitional coating is susceptible to cracking.

The invention discloses a high strength and energy saving flexible bridge frame, which includes a bridge frame shell. The bridge frame shell is externally provided with a protective coating formed by paint, and the paint is composed of polyurethane, epoxy resin, acrylic resin, polytetrafluoroethylene, polyethylene glycol, butanediol, linseed oil, alumina, ceramic powder, silicon powder, cerium oxide, a solvent, a curing agent, aluminum potassium sulfate and sodium fluosilicate. Due to adoption of polyurethane, epoxy resin, acrylic resin and polytetrafluoroethylene by the invention, the high crosslinking density paint can be formed through mutual synergistic effects of the resins. The paint has extremely high surface hardness, excellent flexibility, bending resistance and flexibility, and excellent physical and mechanical properties, thus being able to avoid stress concentration. Therefore, the film formed by the paint has very good tensile strength, tear strength and stone impact resistance, thereby ensuring the service life of the bridge frame.

The invention provides an automobile water-based primer surfacer with excellent chip resistance and a preparation method thereof. The automobile water-based primer surfacer is characterized by consisting of the following components in parts by weight: 18-26 parts of water-based epoxy resin, 36-45 parts of water-based polyester resin, 0.1-0.4 part of gas-phase silicon dioxide anti-settling agent, 7-12 parts of methylated melamine resin, 6-10 parts of talc powder, 10-15 parts of calcium carbonate, 4-7 parts of barium sulfate, 8-13 parts of butyl cellosolve, 0.2-0.5 part of water-based dispersing agent, 0.1-0.4 part of water-based leveling agent and 0.2-0.6 part of water-based wetting agent. The water-based automobile primer surfacer provided by the invention has excellent chip resistance and impact strength, wherein the chip resistance can reach the level 3, and the impact strength is 294N.cm; the performances such as gloss, adhesion, heat and humidity resistance, salt mist resistance and the like reach the standard for a solvent type automobile primer surfacer.

The invention relates to the technical field of coating, in particular to a dual-component waterborne polyurethane intermediate coating composition with anti-sagging characteristics and a preparationmethod thereof. The composition is mainly prepared from an A component and a B component. The A component is prepared from, by mass, 28-45% of hydroxyl functionalized waterborne acrylic resin, 2-9% ofa cosolvent A, 0.2-1.2% of a dispersant, 0.2-0.35% of a leveling agent, 0.1-0.3% of a defoamer, 0.1-0.45% of a pH regulator, 6-17% of pigment, 14-40% of a filler, 4.5-12.5% of a waterborne anti-sagging polymer containing a polyurea group and 6.55-12% of deionized water. The composition has excellent sagging resistance, adhesive force, waterproofness and resistance to stone crash.

The invention relates to a low-temperature stone chip-resistant automobile refinishing paint varnish and a preparation method thereof. The low-temperature stone chip-resistant automobile refinishing paint varnish comprises the following components in parts by weight: 60-70 parts of hydroxy acrylic resin, 10-30 parts of a solvent, 0.5-1.5 parts of a levelling agent, 0.1-0.5 parts of a catalyst, and0.5-1.5 parts of an ultraviolet ray absorber; while in preparation, the hydroxy acrylic resin and the solvent are weighed according to a formula, the materials are mixed and uniformly dispersed, under low-speed stirring condition, the levelling agent, the ultraviolet ray absorber, and the catalyst are added in order, the materials are stirred and mixed at a high speed, and the target product canbe obtained. Compared with the prior art, after the varnish is subjected to solidification at low temperature and film forming, the refinishing paint varnish has excellent stone chip-resistant performance, can achieve stone chip-resistant performance of an automobile original paint, has low VOC, and is environmentally friendly.

The invention discloses super fast-drying high-solid polyurethane paint and a preparation method thereof. The polyurethane paint comprises base stock and a curing agent, wherein the base stock comprises hydroxy acrylic resins, coloring pigments, a filler, an enhancer, an additive and a solvent. The preparation method comprises the following steps: uniformly dispersing the hydroxy acrylic resins with an antifoaming agent, a dispersing agent and a solvent, adding the coloring pigments and the filler, and shearing and dispersing at a high speed; deeply dispersing by a sanding and sealing process;and finally, adding the enhancer and a surface additive to prepare the paint. The application method comprises the following steps: mixing the base stock and the curing agent according to a ratio, uniformly stirring, blending to applicable viscosity, and applying and coating. According to the super fast-drying high-solid polyurethane paint disclosed by the invention, the problem that the conventional coating is high in emission of VOCs (Volatile Organic Compounds), slow in surface drying and long in turnover construction period is solved, the decoration requirement and corrosion prevention requirement of equipment manufacturing devices can be met, the environmental requirement can also be met, and the construction is rapid.

The invention relates to stone-crash-resistant automobile corrosion-resistant wax and a preparation method thereof, and belongs to the technical field of metal corrosion prevention. The characteristicthat environment-friendly phytic acid compounds inositol hexaphosphoric acid and tannic acid are liable to be self-assembled on the surface of metal to form a film is utilized; when the environment-friendly phytic acid compounds inositol hexaphosphoric acid and tannic acid are contacted with the surface of the metal, the two anti-rust groups are chelated with the surface of the metal to generateone layer of compact passivation film, and composite paraffin is met and guided to gradually form a protective wax film on the surface of plate material; on the other hand, the two anti-rust groups have optimal compatibility with metal polymers with excellent corrosion resistance such as titanium and aluminum in the metal, the two anti-rust group and a film-forming substance jointly form a corrosion-resistant layer with high compactness on the surface of the metal, and the corrosion-resistant layer has extremely high barrier property on erosion and corrosion mediums such as water, oxygen and ions. The corrosion-resistant wax prepared by the method has extremely high barrier property and high stone crash resistance, is applied to the surface and the hole gap of the material by a spray-coating mode, and has high long-time corrosion resistance.