30results about How to "Strong anti-yellowing" patented technology

The invention discloses novel polyurethane semi-matte white finish for woodware protection. The finish is prepared by mixing the following components: stearic acid modified alkyd resin, polyketone resin solution, an antifoaming agent, an anti-settling agent, a dispersing agent, white slurry, handfeel wax powder, aerosol extinction powder, 20 percent hydroxyl modified vinyl acetate (VAGH) resin, a leveling agent, an anti-yellowing auxiliary agent, a deodorant and butyl ester. A film prepared from the novel polyurethane semi-matte white finish has the advantages of fullness, moderate hardness, high flexibility, high water resistance, yellowing resistance and environmental protection; and the semi-matte white finish has high comprehensive performance.

The invention discloses a matt weather-resistant powder coating and a preparation method thereof. The matt weather-resistant powder coating comprises the following components in parts by weight: 49-49.9 parts of first power, 49-49.9 parts of second powder and 0.2-2 parts of aluminum oxide, and the mass ratio of the first powder to the second powder is 1: 1. The preparation method of the coating comprises the following steps: step 1, preparing the first powder; step 2, preparing the second powder; and step 3, mixing the first powder, the second powder and the aluminum oxide in a preset ratio toobtain the product. According to the matt high weather-resistant powder coating disclosed by the invention, the effects of matt, good curing performance and excellent weather resistance are achievedby mixing the first powder with the second powder in proportion.

The invention relates to a preparation method of aqueous emulsion type neoprene antioxidant system product, which belongs to the field of adhesive technology. The invention chooses p-cresol and dicyclopentadiene butyl reactant as the main antioxidant to coordinate with the composite termination agent made from phenothiazine and N,N-dialkyl hydroxylamine compound to produce a functional antioxidant. With the adoption of the suspension producing process and powder grinding and emulsifying equipment, the functional antioxidant is further produced into an aqueous emulsion type neoprene antioxidant system product. Adding 0.75-1.89% of aqueous emulsion type neoprene antioxidant system product provided by the invention in the process of preparing a neoprene product sample, the appearance and color,mooney viscosity, peeling strength, viscosity performance indexes of the solution are relatively stable in a hot air aging test under the temperature of 70 DEG C.

The invention belongs to the technical field of organosilicone and discloses a quaternary ammonium salt modified diamine-terminated polydimethylsiloxane emulsion and a preparation method and an application thereof. The emulsion provided by the invention comprises the following components which are obtained by performing a reaction in water in parts by mass: 100 parts of diamine-terminated polydimethylsiloxane, 0.5-100 parts of quaternary ammonium salt with epoxy groups and 10-300 parts of a nonionic emulsifier. The quaternary ammonium salt modified diamine-terminated polydimethylsiloxane emulsion provided by the invention is prepared in an emulsifying system, so that the problem that the reaction rate is low as materials are not dissolved by one another is solved, and no organic solvents are needed, and the emulsion is high in flexibility and high in practicality; a quaternary ammonium salt functional group is introduced into the molecular framework thereof, so that the product performance of diamine-terminated polydimethylsiloxane is further improved, the stability is good and the anti-yellowing ability is strong. The quaternary ammonium salt modified diamine-terminated polydimethylsiloxane emulsion provided by the invention is simple and feasible in production process, short in production period, free of strict requirements on production equipment, and easily available in raw material, can easily realize industrial production, and provides a conditioning aid which is unique in performance for daily use chemicals and textile industries.

The invention discloses a preparation method for coating PVDC (polyvinyl dichloride) waterborne emulsion. The method includes the steps: (1) preparing reaction raw materials; (2) preparing initiator water solution; (3) preparing premixed liquid; (4) polymerizing seed emulsion; (5) polymerizing PVDC emulsion; (6) desorbing the emulsion. Hard pieces such as PVC (polyvinyl chloride), PET (polyethylene terephthalate), nylon and PCT (polycaprolactam) are coated with the PVDC waterborne emulsion prepared by the method to prepare composite hard pieces, and the composite hard pieces have the advantages that the composite hard pieces are high impact strength and heat stability, good in barrier property and high in yellow-resistant ability, do not easily generate cracks, cannot dissolve out harmfulsubstances and can directly contact with drugs and the like.

The invention relates to the technical field of building materials and in particular relates to anti-ultraviolet and heat-insulated external wall paint and a preparation method thereof. The external wall paint comprises the following raw materials in percentage by weight: 10%-15% of de-ionized water, 0.1%-0.15% of a preservative, 1%-1.5% of a dispersant, 0.2%-0.5% of a wetting agent, 16%-20% of rutile titanium dioxide, 6%-8% of heavy calcium carbonate, 7%-10% of calcined kaolin, 5%-9% of wollastonite, 6%-8% of magnesium oxide, 30%-35% of acrylic acid modified emulsion, 0.3%-0.5% of an anti-settling agent, 3%-5% of glass beads, 0.9%-1.05% of an anti-yellowing agent, 2%-5% of a film-forming assistant, 0.2%-0.5% of a flatting agent and 0.25%-0.5% of a thickener. According to the external wall paint, the performance of reflection and heat insulation on light and heat is improved; outdoor and indoor heat bridges are disconnected for preventing outdoor and indoor heat alternation, so that the indoor heat loss is reduced, the energy resources are saved, the heat loss is reduced, the yellowing resistance is enhanced, and the heat insulation function is improved; the temperature of the external wall paint is 2.46 DEG C lower than the box indoor temperature of general paint, and the heat insulation effect is remarkable.

The invention discloses an engineering plastic with stable size, and a preparation method thereof. The engineering plastic comprises, by weight, 40-70% of PBT, 5-30% of PET, 3-10% of a compatilizer, 10-30% of a glass fiber, 5-25% of mica, 10-20% of a flame retardant, 0.1-0.5% of a main antioxidant, 0.1-0.5% of an auxiliary antioxidant and 0.1-0.5% of a lubricant. The mica and glass fiber components are added into the PBT system, so that the rigidity of the material can be improved, the size shrinkage rate of the product can be reduced, and the hardness and wear resistance of the product can beremarkably improved; besides, the PET component is added into the PBT system, so that the buckling deformation of the material can be improved, the size shrinkage rate of the product can be reduced,the molding processing stability of a workpiece can be improved, the temperature resistance can be improved, and the material cost can be reduced; and in addition, after the compatilizer is added, themica, the glass fiber and the PBT have good compatibility, and the impact strength of the alloy material can be greatly improved.

The invention relates to the technical field of resin modification, in particular to an anti-yellowing salt-fog-resistant polyamide-imide resin composition as well as a preparation method and application thereof. BOCAT-A and BOCAT-B are added into polyamide-imide resin to modify the polyamide-imide resin; the mass percentages of the added BOCAT-A, the added BOCAT-B and the added polyamide-imide resin are 5.0-20.0% and 2.0-8.0% respectively, the amide-imide resin modified by the BOCAT-A and the BOCAT-B has advantages of strong yellowing resistance and high salt spray resistance, and the polyamide-imide resin is modified by the BOCAT-A and the BOCAT-B so as to enhance the comprehensive performance of the polyamide-imide resin.

The invention relates to the technical field of sugarcane planting, in particular to a perennial root sugarcane management method for a sugarcane yellowing susceptible area. According to the method, the soil conditioner is spread before seedling emergence of the ratoon sugarcane, sufficient nutrients are provided for the ratoon sugarcane, rooting and germination are promoted, chlorophyll is promoted, the pH value of soil is adjusted, residual pesticide in the soil is degraded, some heavy metal is transferred, solidified and passivated, and harmful soil residues are reduced; the effect of preventing and treating diseases and pests is achieved, flora balance is adjusted, and the condition of soil hardening is prevented and treated; the foliar fertilizer is sprayed after sugarcane seedling emergence, nutrients can be provided for ratoon sugarcane, growth of chlorophyll is promoted, root development can be promoted, the soil holding capacity and nutrient absorption capacity of sugarcane roots can be improved, the effects of yellowing resistance, seedling strengthening, drought resistance and high stress resistance are achieved, and an effective way is provided for high quality and high yield of ratoon sugarcane.

The invention belongs to the field of foaming sole manufacturing processes, and particularly relates to a glue-free foaming sole which comprises a wear-resistant layer bottom piece, a thin film layeris bonded to the wear-resistant layer bottom piece, a foaming layer is wrapped in the thin film layer, and the thin film layer is of a double-layer structure of an aliphatic TPU layer or an aliphaticTPU bottom layer composite aromatic TPU surface layer and other common TPU surface layers. In addition, the invention correspondingly provides a corresponding manufacturing method. According to the invention, the aliphatic TPU film is adopted, has very high viscosity after being heated and softened, can be directly and stably bonded with the sole without glue, effectively avoids the pollution caused by using glue as a bonding agent, is environment-friendly, labor-saving and convenient to popularize and apply, and has remarkable substantive features.