44results about How to "Improve finishing performance" patented technology

The invention discloses copolymer of grafting maleic anhydride on molten polypropylene and a preparation method for the copolymer. The preparation method comprises the following steps of: uniformly stirring the following raw materials in percentage by weight: 85 to 98.6 percent of polypropylene, 0.5 to 8 percent of maleic anhydride, 0.5 to 10 percent of beta-pinene, 0.2 to 3.5 percent of initiator and 0.2 to 2 percent of antioxidant; and performing melt extrusion granulation by using a stepwise heating mode. A weight ratio of the maleic anhydride to the beta-pinene in the copolymer is 1:0.5-1:20. A second comonomer of beta-pinene is introduced, the grafting rate of grafting the maleic anhydride on the polypropylene is improved, and the beta-pinene has a crosslinking function and can keep the impact strength.

The invention relates to a hot rolled steel plate for a container with yield strength of 750MPa and a manufacturing method thereof and solves the technical problem that rusty red scales are likely to be generated on the surface of the hot rolled steel plate for the container with yield strength of 750MPa and the production cost is high. The hot rolled steel plate for the container with yield strength of 750MPa provided by the invention comprises the chemical components in percentages by weight: 0.06-0.09% of C, 0.25-0.35% of Si, 1.65-1.75% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.050-0.070% of Nb, 0.085-0.095% of Ti, 0.0015-0.0045% of Ca, 0.02-0.005% of Alt and the balance of Fe and inevitable impurities. No rusty red scales are generated on the surface of the hot rolled steel plate provided by the invention, and the hot rolled steel plate is used for manufacturing panels and structural parts of containers.

The invention provides a flame-retardant and high-temperature resistant oriented particle board, which comprises a surface layer and a core layer, the surface layer is composed of large shavings; the core layer is composed of large shavings and fine shavings, and the paving angle between the surface layer and the core layer is 45-90°. The present invention also provides a method for preparing flame-retardant and high-temperature-resistant oriented strand board, including shavings, initial washing of shavings, drying, re-washing of shavings, draining, balancing, curing, drying, mixing, sizing, paving, hot pressing, Trimming, sanding. The beneficial effects of the present invention are: the flame-retardant and high-temperature-resistant oriented particle board of the present invention has good thermal stability, is not easy to delaminate and crack when heated, and can ensure stable flame-retardant performance; it is difficult to release toxic substances when heated; the added flame-retardant components can effectively adhere to On the surface of shavings, it has good flame retardant performance and can withstand high temperature attack; it has good physical and mechanical properties and good durability.

The invention discloses acrylate modified polyurethane resin for leather finish. The acrylate modified polyurethane resin for leather finish is characterized by being prepared from the following components in parts by weight: 50-65 parts of polyalcohol, 140.1-169.54 parts of solvent, 4-10 parts of chain extender micromolecular alcohol, 0.03-0.04 part of antioxidant, 16-34 parts of isocyanate, 0.02-0.03 parts of catalyst, 0.01-0.02 part of polymerization inhibitor, 2.1-3.6 parts of hydroxyl acrylate, 1.15-1.85 parts of end-capping reagent, 0.68-1 part of initiator and 55-77 parts of acrylic monomer. The invention further discloses a preparation method of the acrylate modified polyurethane resin for leather finish. By adopting polyurethane resin as a base material and acrylate as a main modifying material, the product provided by the invention has the advantages of two resins, and the cost is reduced by over 30% compared with that of pure polyurethane. The acrylate modified polyurethane resin for leather finish disclosed by the invention has excellent composite material performance and higher cost performance, so that the solid content is improved by over 50%.

The invention discloses an aging-resistant PC-PBT plastic alloy, which is composed of the following components in weight part: 100 parts of PC, 20-40 parts of PBT, 4-8 parts of compatibilizer and 0.5-1.5 parts of age resister. The PC-PBT plastic alloy disclosed by the invention has the advantages of good thermal tolerance, good stress cracking resistance, excellent abrasive resistance, excellent chemical corrosive resistance, high low-temperature impact strength, easiness in machining and good coating property, and is mainly applied to bumpers, chassis and panels of superior quality cars, fenders of motorcycles and the like. The aging-resistant PC-PBT plastic alloy also has excellent thermal aging property, thereby being suitable for use in the extremely high temperature environment.