32results about How to "No reduction in physical properties" patented technology

A flame resistant synthetic resin composition is characterized in that 1-40 parts by mass of at least one of organophosphorus compounds represented by the following general formula (1): (wherein R<1> represents an alkyl group, an aralkyl group or the like) is blended per 100 parts by mass of a synthetic resin.

It is an object of the invention to provide a method for producing an optical element having a multi-layered antireflection film formed on a synthetic resin substrate, in which the antireflection film formed has good heat resistance, and its heat resistance lowers little with time. The method makes it possible to form high-refraction layers within a shorter period of time, not detracting from the good physical properties intrinsic to the layers. At least one high-refraction layer of the multi-layered anti-reflection film contains niobium oxide, zirconium oxide, yttrium oxide, and optionally aluminum oxide.

A room-temperature-curable polyorganosiloxane composition which can become a silicone rubber having a matte surface and does not decrease in physical properties. Specifically, the room-temperature-curable polyorganosiloxane composition comprises: (A) 100 parts by weight of a substantially linear polyorganosiloxane which has a viscosity at 25 DEG C of 20-1,000,000 cSt and in which the molecular chain ends have been blocked with a silanol group or a silicon-bonded hydrolyzable group; (B) 0.1-15 parts by weight of an organosilicon compound having three or more silicon-bonded hydrolyzable groups per molecule; (C) 0-15 parts by weight of a condensation catalyst; (D) 100-400 parts by weight of untreated heavy calcium carbonate or heavy calcium carbonate whose surface has been treated with a resin acid; and (E) 1-200 parts by weight of untreated lightweight calcium carbonate or lightweight calcium carbonate whose surface has been treated with a resin acid (provided that at least one of the ingredients (D) and (E) must have been treated with a resin acid and that the proportion of the ingredient (D) is 50-99.9 wt.% of the sum of the ingredients (D) and (E)).

As to the conductive roll 10 equipped with a core bar 2 and an conductive elastic layer 1 on the surface side of the core bar 2, electrostatic capacity at 100Hz is set to <=50pF, and electric resistance at the applied voltage 1000V is set to >=10<5>[Omega] and <=10<9>[Omega]. Electrostatic capacity C(L) at the low frequency Hz(L) of AC and electrostatic capacity C(H) at the high frequency Hz(H) of AC are set to relation 0<(C(L)-C(H)) / (log10Hz(H)-log10Hz(L))<10. The conductive roll has excellent electric characteristic and capable of surely restraining toner scattering.

The invention discloses a motor car of a 100% low-floor tramcar and an assembly method of the motor car. The motor car comprises a few of large components, such as a top rack, a side wall, a bottom rack, an end wall, an upper hinge component and a cab, wherein the components adopt a riveting mode instead of a traditional welding mode. A car body component adopts a modular design, the components are riveted, each component has good production independence, maintenance universality and interchangeability, and each component can synchronously develop production. Riveting is free of a heat effect, or even coating can be carried out before general assembly, so that the production efficiency is greatly improved, other components of the car body adopt an aluminum profile welding structure except for that the components with large stress adopt a steel structure, the total weight of the car body is greatly relieved in comparison with an all-steel structure, and the lightweight purpose is achieved.

The invention relates to a waterproof and moisture-permeable coating agent composition, wherein, a certain amount of microporous lignocellulose fine powder is added into the coating agent with waterproof function, so that the coating agent has moisture permeable performance. The waterproof and moisture-permeable coating agent composition which is used as the coating agent for non-woven fabric, knitted fabric or woven fabric can be made into coated fabric and synthetic leather with waterproof and moisture permeable performances. Compared with the prior at, the invention has the advantages that: 1. the raw material is easy to be added, the process is available with high adaptability, no need to add new equipment; 2. on the premise that the waterproof performance is not decreased, the amountof moisture permeated is increased obviously and the anti-adhesion is improved; 3. the coated fabric and superfine fiber and artificial cover synthetic leather made by the invention has the advantages of fine moisture permeability, high resistance to water pressure and that the physical performance does not decrease.

A process for producing a polyimide which comprises subjecting a diamine and a tetracarboxylic dianhydride to imidization in a solvent comprising 50 to 100 wt.% composition consisting of a nitrogenous cyclic compound represented by the following chemical formula (1) and a phenol represented by the following chemical formula (2) in an equimolar proportion. (In the formula (1), X represents -CH2- or -N(CH3)-. In the formula (2), R1 and R2 may be same or different and each represents -H, -OH, -CH3, -C2H7, -C3H7, -C2H9, -C5H11, -C6H13, -C7H15, -C8H17, -C9H19, -C10H21, -OCH3, -O(C6H5), -NO2, -Cl, -Br, or -F.).

The invention discloses a water-retention treating agent for latex fiber boards, a preparation process of the water-retention treating agent and a water-retention method. The water-retention treating agent for latex fiber boards is characterized by comprising, by the total mass fraction of 100%, 0.35-0.70% of a moisture absorbent, 0.30-0.60% of a deliquescing agent, 0.35-0.70% of an adhesive and 98.0-99.0% of water. The water-retention treating agent for latex fiber boards can permeate latex fiber boards effectively under high temperature conditions and under the action of pressure, so that moisture of latex fiber boards can be increased, and even if the environment humidity changes, the balanced moisture of latex fiber boards can also be in the normal state and is not changed obviously with environments. By the aid of the water-retention treating agent for latex fiber boards, 10.0% of the long fiber usage amount can be reduced, simultaneously, physical properties of materials are not reduced, and overall indicators of products can meet product quality requirements and can meet machining performance requirements and usage performance requirements of products, so that costs are reduced, and benefit can be increased.

A xylylenediamine composition comprising xylylenediamine and a pyridine compound (A) having at least one substituent comprising an amino group, the content of the pyridine compound (A) relative to 100 parts by mass of xylylenediamine is 0.001 to 0.1 parts by mass; and [2] a method for producing a polyamide resin comprising a pyridine compound (A) having at least one substituent containing an amino group, a diamine containing xylylenediamine (wherein, not Including the step of introducing (diamine) corresponding to the aforementioned pyridine compound (A) and dicarboxylic acid into the reaction system to carry out polycondensation reaction, the introduction amount of the pyridine compound (A) is 0.001 to 100 parts by mass of xylylenediamine 0.1 parts by mass.

The invention relates to an enhanced conductive nylon material and a preparation method thereof. The enhanced conductive nylon material comprises the following raw materials in percentage by weight: 40 to 70 percent of nylon, 10 to 40 percent of glass fibers, 10 to 40 percent of metal powder, 0.1 to 5 percent of coupling agent, 0.1 to 0.5 percent of antioxidant and 0.5 to 5 percent of silicone oil. The invention provides a method for thermoplastic conductive plastics by attaching the metal powder to the glass fibers twice and mixing the glass fibers, the metal powder and plastics for pelleting by utilizing the characteristics of easy machining and dispersion of the glass fibers in the plastics, and the prepared thermoplastic conductive plastics have the characteristics of simple and convenient production process, uniform dispersion of the metal powder, small addition amount, controlled conductivity and smooth surfaces of products.

The invention discloses a preparation method of an attapulgite modified bio-based polyurethane foam insulation material. The preparation method comprises the steps of compounding propanediol obtained by liquefying cellulosic biomass and attapulgite to obtain compound propanediol, and compounding modified attapulgite obtained through acid modification and organic modification and isocyanate to obtain compound isocyanate; mixing propanediol or compound propanediol, a foam stabilizer, a foaming agent and a catalyst uniformly to obtain a viscous mixture; quickly adding isocyanate or compound isocyanate to the viscous mixture in a stirring state, and aging the product at a certain temperature for a while after complete foaming and curing, thus obtaining a rigid polyurethane foam insulation material with a flame retardant function. The preparation method has the characteristics of simple process, low production cost, no need for special equipment, easiness in implementation of industrialization and the like. The polyurethane foam insulation material is a rigid foamed plastic with good flame retardance.

The present invention relates to a steel wire having an excellent straightness quality and a method for manufacturing same. The steel wire having an excellent straightness quality comprises a wire which goes through, after going through a wire drawing step, a heating step in which the wire is heated in a state where tension is applied thereto, and then goes through a cooling step, wherein when thewire is wound around a winding part having a diameter larger than the diameter of the wire during a predetermined period and then the linearity of the wire configured to have length of 400 mm is measured, the linearity of the wire is 30 mm or less. A method for manufacturing a steel wire having an excellent straightness quality comprises a wire preparing step, a heating step, a cooling step, anda linearity measuring step.

The invention proposes a method for preparing a flame-retardant polymer polyol for high resilience. After the preparation process of flame retardant selection and matching and polymerization reaction, it becomes a flame retardant polymer polyol product. The polymer polyol prepared by the method of the invention has low cost and low viscosity, and its products have flame retardancy, low smoke emission, no toxic gas is emitted during combustion, and the physical properties of the products are not reduced. It is suitable for use in the preparation of flame-retardant polymer polyols for high resilience.

The invention discloses a room-temperature moisture-curable single-component flame-retardant polyurethane sealant and a preparation method thereof. The sealant is prepared from the following raw materials in parts by weight: 30-55 parts of liquid polyether type polyurethane pre-polymer base stock, 10-30 parts of flame-retardant plasticizer, 0.1-1 part of silane coupling agent, 15-30 parts of flame-retardant powder, 10-30 parts of filler, 0.01-0.05 part of catalyst and 0.2-3 parts of methyl benzenesulfonyl isocyanate, wherein the liquid polyether type polyurethane pre-polymer base stock is prepared from the following raw materials in parts by weight: 32.8-57.64 parts of common polyether glycol, 28.82-54.67 parts of flame-retardant polyether glycol, 12.51-13.53 parts of polyisocyanates, and 0.01 part of catalyst. The room-temperature moisture-curable single-component flame-retardant polyurethane sealant is excellent in physical performance, thixotropic property and flame-retardant performance, and convenient for construction.