174results about How to "Reduce intermolecular forces" patented technology

The invention discloses aromatic diamine containing phthalonitrile side group, which is characterized in that the structural formula is shown in the specification, wherein R is one of CF3CCF3, CH3CCH3, O, CO and S. A preparation method of the aromatic diamine containing phthalonitrile side group comprises the following steps of: adding 4-nitrophthalonitrile or 3-nitrophthalonitrile, a compound 1, potassium carbonate and a high-boiling point solvent into a reaction container; conducting reaction for 10-24 hours at room temperature under protection of nitrogen; and then precipitating, filtering and drying. The aromatic diamine containing phthalonitrile side group can be applied to the preparation of polyimide, polyamide and polyamide-imide.

The invention discloses a luminescence auxiliary material, a preparation method thereof and an organic electroluminescence device, and belongs to the field of chemical synthesis and photoelectric materials. The structural general formula is shown in the specification, in the formula, Ar1, ar2 and Ar3 are each independently one or more of substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted 3-to 30-membered heterocycloalkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C1-C30 alkylamino, substituted orunsubstituted C1-C30 alkoxy, substituted or unsubstituted C6-C30 arylamino, substituted or unsubstituted 3-to 30-membered heteroaryl, substituted or unsubstituted C10-C30 fused ring group, substitutedor unsubstituted C5-C30 spiro ring group. The luminescent auxiliary material can improve the luminescent efficiency and the service life of the organic electroluminescent device.

The invention relates to an anti-water-blocking agent for drilling fluid and a preparation method thereof. The anti-water-blocking agent is a polymer containing a butyl acrylate (BA) monomer, a methyl methacrylate (MMA) monomer, a methacrylic acid (MAA) monomer, an acrylamide (AM) monomer and a 2-(perfluorohexyl)ethyl methacrylate (G06B) monomer, wherein the mol percent of a is 35.8-36.5%, the mol percent of b is 27.0-30.5%, the mol percent of c is 7.5-9.0% and the mol percent of d is 7.5-9.0%. According to the invention, the anti-water-blocking agent effectively reduces filtrate surface tension and oil-water interfacial tension, improves gas-phase relative permeability, has a good invading fluid draining effect and is beneficial to driving away resident fluid in near wellbore formations in a draining manner so as to better relieve the water blocking effect. The preparation method of the anti-water-blocking agent is safe and economic and has a high conversion rate; and a batch feeding method is used, so that the requirements for low dosage and high performance are met.

The invention discloses sealant of a dual-component and bisphenol A type epoxy resin structure and the preparation method, which comprises a first component and a second component, wherein, the first component comprises 75 parts to 95 parts of bisphenol A type epoxy resin, 8 parts to 22 parts of toughening agent, 75 parts to 95 parts of filling agent and 15 parts to 25 parts of plasticizing agent, the second component comprises 40 parts to 60 parts of curing agent, 45 parts to 55 parts of filling agent and 5 parts to 15 parts of ferric oxide powder. The preparation method comprises the followings: the preparation of the first component: the materials in the first component are poured into an agitating barrel according to the weight parts proportion, evenly stirring the materials, until grayish white fluid is obtained, namely the first component; the preparation of the second component: the materials in the second component are poured into the agitating barrel according to the weight part proportion, evenly stirring the materials, until grayish red fluid is obtained, namely the second component; the first component and the second component are mixed and evenly stirred according to the weight part of 2.8 to 3.2:1, and the sealant of the dual-component and bisphenol A type epoxy resin structure is obtained. The sealant has the advantages that the pliability is good, the stripping strength is strong, and the physical mechanical performance and the process performance are well improved.

The invention discloses a star-like amphoteric polycarboxylate superplasticizer with efficient anti-mudding function and a preparation method thereof; the preparation method comprises: esterifying Beta-cyclodextrin and a dithioester compound with acyl halide groups to obtain star-structure reversible addition-fragmentation chain transfer agent (RAFT agent), initiating RAFT polymerization of (methyl)polyethylene glycol diacrylate, (methyl)acrylic acid and (methyl)acryloyloxyethyl trimethyl ammonium chloride under the action of the chain transfer agent and an initiator to obtain star-like amphoteric copolymer, and carrying out further processing to obtain the star-like amphoteric polycarboxylate superplasticizer having a solid content of 20% and efficient anti-mudding function. The polycarboxylate superplasticizer prepared herein has high water-reducing rate and efficient ant-mudding function and may meet high construction requirements.

The invention discloses a star-shaped amphoteric polycarboxylate superplasticizer and a preparation method thereof. The method includes: esterfying cyclodextrin to obtain a star-shaped initiator, initiating atom transfer radical polymerization of (methyl) polyethylene glycol acrylate, (methyl) sodium acrylate, (methyl) acryloyloxyethyl trimethyl ammonium chloride and (methyl) hydroxylethyl acrylate to obtain a star-shaped copolymer of the four monomers, and conducting further treatment to obtain a star-shaped amphoteric polycarboxylate superplasticizer with a solid content of 20%. The polycarboxylate superplasticizer prepared by the method provided by the invention has high water reducing rate and good mud resistance, meets high construction requirements, and has good application prospect.

The invention relates to a high-fluidity wide-processing-widow polyimide pre-polymer and a preparation method thereof. A structural formula is shown in the description, wherein n is 1-20 and is an integer. The preparation method comprises the steps of dissolving 3,4'-diaminodiphenyl ether 3,4'-ODA in an organic solvent under the nitrogen protection condition, adding 2,3,3',4'-tetracarboxydiphthalic ether dianhydride a-ODPA after complete dissolution, meanwhile adding the organic solvent to enable the solid content of a solution to be 10%-40%, adding an end-capping reagent during reaction at the room temperature to continue to perform reaction, dropwise adding a dehydrating agent to perform reaction, washing, drying and smashing. The pre-polymer can be formed through compression molding, is well applicable to a resin transfer forming process and has potential application value on the aspect of preparation of high-performance composite materials, high-temperature-resisting adhesives and the like.

The invention relates to a bismaleimide prepolymer and a preparation method. The material has the following structure formula shown in the description. The preparation method comprises the following steps of under the nitrogen gas protection, 3,4'-diaminodiphenyl ether are dissolved in an organic solvent; after complete dissolution, 2,3,3',4'-biphenyl tetracarboxylic dianhydride or 2,3,3',4'-diphenyl ether tetracarboxylic acid dianhydride are added; meanwhile, the organic solvent is added so that the solid content of the solution is 5 to 50 percent; room temperature reaction is performed; an end-capping reagent of maleic anhydride is added; reaction is continuously performed; then, dewatering agents and catalysts are added drip by drip; reaction, washing, drying and crushing are performedto obtain the bismaleimide prepolymer. The prepared bismaleimide material has good comprehensive performance; before crosslinking, the high dissolution degree, low vitrification conversion temperatureand higher temperature processing window are realized; after the heating curing, good temperature resistant performance is realized. The material can be prepared into films, high-performance resin-based composite materials and high-temperature-resistant structure bonding agents and the like, the bismaleimide prepolymer can be applied to the fields of aerospace, printed circuit boards, semiconductor encapsulation and the like.

The invention discloses an antibacterial sanitary mobile phone film and a preparation method thereof, and relates to the field of mobile phone films.The preparation method comprises the steps that an antibacterial antifouling emulsion, a curing agent, a cosolvent, deionized water, a coalescing agent, a flatting agent, a coupling agent and a defoaming agent are stirred to be uniform, then standing and filtering are conducted, and antibacterial sanitary coating is obtained; the antibacterial sanitary coating is sprayed to a rectangular glass sheet subjected to ultrasonic cleaning, an antibacterial sanitary coating is formed after drying, finally, rubberizing is carried out, packaging is carried out after inspection is qualified, and the antibacterial sanitary mobile phone film is obtained. The antibacterial and antifouling emulsion is formed by polymerization of four monomers including methyl methacrylate, butyl acrylate, an intermediate 3 and an intermediate 5, the intermediate 3 endows the antibacterial and antifouling emulsion with good stain-resistant and self-cleaning effects, a formed coating is not prone to being contaminated by stains and easy to clean, and the intermediate 5 endows the antibacterial and antifouling emulsion with good antibacterial and antiviral performance, so that the antibacterial and antifouling emulsion is good in anti-fouling and self-cleaning effects. Therefore, bacterium breeding is avoided, and the cleanliness of the mobile phone film is guaranteed.