62results about How to "Regular molecular structure" patented technology

The invention discloses a spraying elastomer raw material composition. The composition comprises an A component raw material and a B component raw material, wherein the A component raw material comprises one or more of polyester polyol having a number-average molecular weight of 400-3000, polyether polyol having a number-average molecular weight of 400-3000, vegetable oil polyol having a number-average molecular weight of 400-2000, amino-terminated polyether having a number-average molecular weight of 200-4000 and polyisocyanate; and the B component raw material comprises polyoxypropylene diamine having a number-average molecular weight of 200-4000, polyoxypropylene triamine having a number-average molecular weight of 400-5000, active aromatic diamine and aromatic diamine. The invention also discloses a prepolymer of a spraying elastomer, a raw material composition and a preparation method of the prepolymer as well as a bathroom product. The spraying elastomer disclosed by the invention is good in various comprehensive properties; and after pressed, the product can memory the original shape, thereby improving the whole comfortable sensation and broadening the use range of the spraying elastomer.

The invention discloses a preparation method of dentritic waterborne polyurethane, comprises the following steps: by using diisocyanate, polyol, dimethylolpropionic acid and diethanol amine as main raw materials, preparing single terminated polyurethane prepolymer, grafting the single terminated polyurethane prepolymer with the generational polyamide-amine 1GPAMAM dentritic polymers, and finally adding a neutralizer, forcibly dispersing in the water to obtain the dentritic waterborne polyurethane emulsion. The dentritic waterborne polyurethane has a high-branched dentritic structure, more structured molecular structure, controllable molecular weight, and is free from organic solvent; the water is used as the dispersion medium, so that the product is non-toxic, the use is safe, efficient and environmental friendly; the dentritic waterborne polyurethane is non-flammable, non-explosive and easy to store.

The invention relates to single-component water-based black paint for an automobile and a preparation method thereof. The single-component water-based black paint for the automobile is prepared by mixing three components A, B and C according to the weight ratio of 4 to (4 to 7) to (0.05 to 0.2), wherein the component A is prepared from the following components in parts by weight: 3 to 7.5 parts ofhigh-pigment carbon black, 15 to 35 parts of water, 3 to 10 parts of methyl ethylene glycol, 0.3 to 2.5 parts of base material wetting agent and 1.5 to 7.5 percent of dispersant; the component B is an aliphatic polyurethane dispersion body; the component C is a rheological agent. According to the single-component water-based black paint for the automobile, the compatibility problem of raw materials is remarkably improved, and the flowability, storage stability, luster, blackness and a blue phase are improved.

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 relates to a modified phenolic resin, and the resin is characterized in that the resin is prepared from the following raw materials in parts by mass: 70 to 110 parts of phenol, 15 to 40 parts of 4-maleimido phenol, 20 to 30 parts of resorcinol, 80 to 110 parts of formaldehyde and 25 to 40 parts of furfural. According to the invention, the selection and proportion of each monomer are screened, 4-maleimido benzene, resorcinol and furfural are added into the formula of common phenolic resin, and two-stage reaction is carried out under different reaction conditions. In the first reaction stage, ammonia water is used as a catalyst at relatively low temperature, and a mixture of resorcinol and formaldehyde is added; in the second reaction stage, barium hydroxide is adopted as a catalyst at a relatively high temperature, and a mixture of resorcinol and furfural is added. Finally, the modified phenolic resin with excellent comprehensive performance is obtained. Compared with common phenolic resin in the current market, the phenolic resin prepared by the preparation method disclosed by the invention is lower in curing temperature, more excellent in heat resistance, higher in residual carbon rate and better in mechanical property.

The invention provides water-based acrylic resin paint. The water-based acrylic resin paint is prepared from, by weight, 30-40 parts of acrylic resin, 10-15 parts of filler, 2-4 parts of coupling agent, 1-4 parts of pigment, 0.2-0.8 part of dispersing agent, 20-25 parts of solvent, 0.3-0.8 part of anti-flash-rust agent, 1-2 parts of anti-settling agent, 6-12 parts of water-based polyurethane, 8-10 parts of PCDL and 10-15 parts of porous konilite. The invention further provides a preparing method of the water-based acrylic resin paint. The water-based acrylic resin paint is high in impact resistance, abrasive resistance and scratch resistance.

The invention relates to an organic microporous material with metal coordination containing heteroatoms and preparation and application thereof. An organic conjugated precursor of the organic microporous material has a structural formula of I or II. The preparation comprises the steps of preparation of 4-trimethylsilylacetylene-2-bromopyridine or 5-trimethylsilylacetylene-3-bromopyridine, preparation of 4-ethynyl-2-bromopyridine or 5-ethynyl-3-bromopyridine, preparation of bis(2-bromopyridine) acetylene or bis(3-bromopyridine) acetylene, preparation of bis(2-thiophene pyridine) acetylene or bis(3-thiophene pyridine) acetylene, preparation of the organic conjugated precursor, and preparation of the organic microporous material with the metal coordination containing the heteroatoms. The organic microporous material has a controllable form and structure, thereby having different properties and functions, and can be applied to the development of novel functional materials such as gas adsorption and storage, molecular separation, catalysis, sustained release of drugs and the like.

The invention provides a straight-chain polyperfluoroether compound with a hydroxyl-containing terminal group and a preparation method thereof. The compound does not contain a branched chain structure, the molecular structure is neater, the compound is smoother, meanwhile, the compound has better viscosity-temperature characteristics, and the application range is wider. The straight-chain polyperfluoroether compound with the terminal group containing the hydroxyl group has a structural formula I shown in the specification; in the structural formula I, m is greater than or equal to 1, and n isgreater than or equal to 1.

The invention discloses a light-resistant and anti-aging water-based acrylate coating and a preparation method thereof. The preparation method of the water-based acrylate coating comprises the following steps that: 1) in the presence of organosilane, heteropolyacid and composite nanoparticles can be effectively combined, and the heteropolyacid, the composite nanoparticles, an emulsifier and a wetting agent jointly prepare a nanoparticle emulsion with a better dispersion effect; and 2) in the presence of an initiator, the nanoparticle emulsion is mixed with a comonomer and a cross-linking agent, and neutralizing is performed with alkali liquor, the required coating can be obtained. The water-based acrylic resin is modified by adopting multiple monomers, so that the bonding strength of the coating and a substrate can be remarkably improved; and in addition, the light resistance and the aging resistance of the composite nanoparticles modified by the heteropolyacid are enhanced, and the strict requirements of long-term outdoor environment work can be met.

The invention discloses a bridge damping support, and relates to the field of bridge construction. The bridge damping support sequentially comprises a top plate, a stainless steel plate, a polytetrafluoroethylene plate, a middle steel plate, a rubber block and a bottom basin, the rubber block is arranged in the bottom basin, and sealing rings are arranged between the rubber block and the middle steel plate. The rubber block comprises, by weight, 60-90 parts of natural rubber, 25-40 parts of butadiene rubber, 1-3 parts of sulfur, 3-6 parts of nano zinc oxide, 2-4 parts of stearic acid, 0.8-1.5parts of accelerant, 2-5 parts of silane coupling agent, 20-30 parts of reinforcing agent, 25-35 parts of carbon black and 1-3 parts of lecithin. The bridge damping support is mainly composed of the natural rubber and the butadiene rubber, has outstanding mechanical properties and is high in tensile strength and tearing strength, molecular chain breaking caused by the action of external mechanicalstress is not likely to happen, and the anti-seismic property is excellent. The lecithin serves as a modifier so that the carbon black can carry out in-situ grafting reaction, then the mechanical aging resistance of the rubber block is improved, and the service life is greatly prolonged.

The invention discloses complementary food of 12-15-month-old babies and a processing method. The complementary food which is scientific and reasonable, is abundant in nutrients and has flavor and taste is provided for babies at different months old. In the invention, a formula and a method of the complementary food are specially designed for the 12-15-month-old babies, and no detailed design is on the market at present; raw materials are materials with the excellent class from a pollution-free base, and grains, vegetables and meat that are digested and absorbed easily are selected. In the whole processing process, magnetized purified water or mineral water is adopted for washing and adding, so that a molecular structure of a product is magnetized; the magnetized purified water is used, so that the chance of pollution caused by heavy metals, pesticide residues and microorganisms is avoided, the original complementary food is more regular in structure, and the entropy is smaller; and therefore, the complementary food is more favorable for the babies.

The invention discloses a method of preparing polymer network by utilizing a controllable click chemical reaction system. The method comprises the following steps: generating a free radial by utilizing a free radial initiator to initiate at a certain temperature; reducing high-valence-state metal ions into low-valence-state metal ions; and synchronously catalyzing an azide compound and an alkynyl compound to carry out click reaction. The method disclosed by the invention utilizes controllability of the free radial initiation efficiency under the temperature to synthesize the polymer network with a regular structure by the polyfunctional-group micromolecule or macromolecule azide compound and the alkynyl compound, so that generation macroscopic defects of the polymer network is avoided, formation of micro defects is reduced and regularity of the polymer network is improved, and therefore, strength of the polymer network is improved.

The invention relates to the field of preparation and application of composite materials, in particular to polyurethane asphalt composite emulsion and a use method thereof. The polyurethane asphalt composite emulsion is prepared from components A, B and C; the component A is polyurethane prepolymer emulsion; the component B is mixed emulsion of petroleum asphalt, fatty acid ethyl ester, carbodiimide, triethylene diamine, light calcium carbonate and a plasticizer; the component C is a mixed solution of a quaternary ammonium salt surfactant and low mass molecule alcohol. In the preparation and implementation processes, no organic solvents are used; meanwhile, the petroleum asphalt is low in toxicity and has small influence on the environment and the health of human; furthermore, the composite emulsion disclosed by the invention and a construction method thereof are higher in applicability to a base material, have a low requirement on the drying performance of the base material, and can be used in irregular surfaces. The method can promote rapid breakage of the composite emulsion, quick precipitation of particles and generation of crosslinking solidification, so that a composite coating film with high intensity, high low-temperature toughness and high watertightness can be obtained.

The invention discloses a method for preparing 1,4,5,8-tetraaminonaphthalene tin chloride hydrochloride and relates to a method for preparing hydrochloride. The method aims at solving the technical problems of more by-products, high cost, low yield, tedious after-treatment and difficulty in industrial large-scale production of the existing method for preparing 1,4,5,8-tetraaminonaphthalene tin chloride hydrochloride. The method disclosed by the invention comprises the following steps: firstly, preparing high-purity 1,4,5,8-tetranitronaphthalene; and secondly, preparing high-purity 1,4,5,8-tetraaminonaphthalene tin chloride hydrochloride. Due to the method, high-purity 1,4,5,8-tetranitronaphthalene which is difficult to synthesize by virtue of the conventional method can be successfully prepared and 1,4,5,8-tetraaminonaphthalene tin chloride hydrochloride is prepared from stannous chloride and concentrated hydrochloric acid in high efficiency by virtue of adding catalytic addictives and the operation process is simplified. The method has the advantages of inexpensive and available selected raw materials, high yield, low cost and environmental friendliness and is suitable for industrial scale-up. The method is applied in the field of preparation of organic intermediate.

The invention belongs to the technical field of chemical industry synthesis, and particularly relates to a preparation method of a polyether polyol with efficient catalytic activity. The preparation method comprises: using a polyol compound as a starting agent, adding an alkali metal aqueous solution, carrying out distillation dehydration, adding an epoxy compound, carrying out a polymerization reaction, adding an alkali metal aqueous solution after completing the reaction, and carrying out distillation dehydration again to prepare the polyether polyol. According to the present invention, withthe application of the prepared polymer in the preparation of high-resilience polyether polyol, the characteristics of high reaction activity, short production period and high stability can be achieved; with the application of the prepared polyether polyol with efficient catalytic activity as the base polyether in the preparation of high-activity and high molecular-weight polyether polyol, the use of other catalysts is not required, the reaction activity of the whole polymerization system is significantly improved, and the product has characteristics of strong catalytic activity, fast reaction and low reaction temperature; and the preparation method is scientific, reasonable, simple and easy-performing.