58results about How to "Strong hydrolysis resistance" patented technology

The invention provides a temperature-resistant and salt-resistant latex blocking agent. The latex blocking agent is prepared from, by weight, 100 parts of hydrophobic monomers, 0.5-25 parts of hydrophilic monomers, 0.1-10 parts of emulgator, 0.01-5.5 parts of a buffer agent, 0.01-4.5 parts of molecular weight modifier, 0.01-6.9 parts of a protective agent, 0.01-2.3 parts of initiator and 67-172 parts of deionized water. The latex blocking agent has good blocking and water loss reduction effects and is resistant to high pressure and high temperature, and a formed mud cake is dense, thin and tough.

The invention provides a preparation method of a thermal insulation coating high-performance polyurethane elastomer. After the reaction of terminal hydroxyl polybutadiene liquid rubber and polyisocyanate, polyurethane is added for reaction for 3 to 4.5 hours at 85 to 90 DEG C to produce isocyanate-terminated prepolymer; a certain amount of heat insulating filler is added in the prepolymer and is mixed evenly to produce component A; chain extender, antioxidant, curing agent and solvent are mixed evenly according to a certain portion to produce component B; the component A and the component B with the weight portion of 3: 1 to 6: 1 are mixed, stirred evenly, cured at room temperature to produce the thermal insulation coating high-performance polyurethane elastomer. The process of the invention used to synthesize the thermal insulation coating high-performance polyurethane elastomer is more reasonable, the product has higher quality and better comprehensive properties. The test date shows that the tensile strength is 3.50 to 5.80MPa, the elongation at break is more than 220 percent, the bond strength is more than 10.0MPa, the glass transition temperature is less than 60 DEG C below zero, the solidification shrinkage rate is less than 0.1 percent. The product is mainly applicable to aerospace industry.

The invention relates to an acid-base resistant polyether modified trisiloxane surfactant as well as preparation and application thereof. The structural formula of the surfactant is shown in the specification: R1 is an alkyl structure; X is equal to NH and O; n is from 0 to 12; m is from 0 to 12; R2 is equal to H and CH3. The preparation method comprises the following steps: under the protection of nitrogen, adding unsaturated polyether and a catalyst in a solvent; heating the oil bath to 60-65 DEG C; taking a reaction for 20-30 min; raising the temperature to 70-120 DEG C; dripping heptamethyltrisiloxane in the liquid to take a reaction for 0.5-48 h, so as to obtain the finished product. The acid-base resistant polyether modified trisiloxane surfactant can be applied to the fields of pesticides, cosmetics, washing, spinning, leather, printing and dyeing, rubber, coating, paint, automobile and machining. The preparation method is simple and convenient in the reaction steps, high in yield, and free from biotoxicity, hazardous substance and VOC (Volatile Organic Compounds) discharge or low VOC discharge. Therefore, the acid-base resistant polyether modified trisiloxane surfactant is environment-friendly, green, and free from pollution, and has high surface activity.

The invention relates to a glass-fiber-reinforced flame-retardant polycarbonate composite material, and a preparation method and applications thereof. The glass-fiber-reinforced flame-retardant polycarbonate composite material comprises, by mass, polycarbonate resin of 10 to 80%, silicone chemically modified polycarbonate of 5 to 80%, silicone toughening agent of 1 to 8%, glass fiber of 5 to 30%,silicone flame retardant of 0.2 to 2%, sulfonate flame retardant of 0.1 to 1%, and an auxiliary agent of 0.4 to 3%. The glass-fiber-reinforced flame-retardant polycarbonate composite material possesses excellent low temperature impact resistance, flame resistance, rigidity, heat resistance, and hydrolysis resistance, contains no halogen, and is friendly to the environment.

The invention relates to two-component polyurethane cement plugging glue, and preparation and application thereof. The two-component polyurethane cement plugging glue comprises a polyurethane polymer and a sodium silicate curing agent, wherein the polyurethane polymer and the curing agent are in the mass ratio of 3:1 to 5:1. The two-component polyurethane cement plugging glue is prepared by mixing the polyurethane polymer and the sodium silicate curing agent. The two-component polyurethane cement plugging glue is used for quickly plugging cement fissures, cracks, splitting seams and the like, and can also be compounded and used with glass fibre cloth for sewage pipeline and treatment pond hole repairing and water seepage plugging. The two-component polyurethane cement plugging glue has the characteristics of easiness in use, high curing speed, low viscosity, capacity of directly performing crack treatment and the like, and further has the characteristics of high hydrolysis resistance, pressure resistance, high cement adhering strength, environment friendliness, non-toxicity and the like.

The invention discloses a special material for preparing a full-biodegradable mulching film and the full-biodegradable mulching film. The full-biodegradable mulching film is prepared from the following raw materials: PBAT, PBS, PPC, talcum powder, a lubricant, nano activated calcium carbonate, nano silicon dioxide, black master batch, an ultraviolet absorbent, a light stabilizer, an antioxidant, SMA and a compatilizer. The black master batch is obtained by mixing and granulating carbon black and PBAT in proportion; the preparation method comprises the following steps: mixing the raw materials,uniformly stirring, performing extruding to obtain a special material, and carrying out film blowing on the special material to obtain the fully-degradable mulching film. According to the invention,the raw material PBS is used for replacing PLA, so that the dependence of the product raw material on PLA is reduced, and the strength and weather resistance of the produced biodegradable mulching film meet the production requirements.

The invention discloses a hydrolysis-resistant twin-tail trisiloxane surfactant containing alkyl and trioxyl, which is shown as the formula (1), wherein R1 is hydrogen or methyl; R2 is alkylenes of 1-6 C atoms; a is 0 or 1; R3 is hydrogen, hydrocarbyls of 1-6 C atoms or acetyls; b and c are numbers between 0 and 6; d, e and f are 0 or positive numbers and satisfy the relationship of 3<=d+e+f<=30, wherein d is not less than 3. The hydrolysis-resistant twin-tail trisiloxane surfactant containing alkyl and trioxyl can remarkably reduce the surface tension of the water solution to be close to 21mN.m-1, has excellent spreading capability on the low-energy hydrophobic surface, is hardly hydrolyzed in 60 days in the environment of pH 4.0 and pH 10.0 and is suitable for pesticide adjuvant.

The invention provides an aromatic single-component polyurea coating. The aromatic single-component polyurea coating is prepared from isocyanate, polycarbonate diol, dimer acid polyester diol, hydroxyl-terminated liquid rubber, an imine latent curing agent, a catalyst, an environment-friendly diluent, an adhesion promoter and a defoaming agent. The invention further provides a preparation method of the aromatic single-component polyurea coating. The coating is a single component and is convenient to use, and a prepared polyurea coating layer has excellent tensile property, wear resistance, hydrolysis resistance, acid and alkali resistance and low VOC, can be used under the conditions of acid, alkali and heat, and can be applied to various occasions with waterproof and anticorrosive requirements under severe conditions.

The invention discloses a hydrolysis-resistant polyurethane adhesive and a preparation method thereof. The hydrolysis-resistant polyurethane adhesive comprises a host agent and a curing agent, wherein the host agent comprises the following components: polyester polyol, carbodiimide, diphenylmethane diisocyanate, adipic acid, polycaprolactone, polytetrahydrofuran ether polyol, a defoaming agent and deionized water, and the curing agent in the hydrolysis-resistant polyurethane adhesive is one or two of HDI (hexamethylene diisocyanate) and HMDI (hexamethylene diisocyanate). The hydrolysis-resistant polyurethane adhesive has excellent hydrolysis resistance, application range of the polyurethane adhesive is greatly widened, the hydrolysis-resistant polyurethane adhesive is especially applicable to the fields of paint and packaging with extremely high water resistance, and a preparation technology is simple, so that production cost is saved, and the effects of saving energy and reducing consumption are realized.

The invention discloses a preparation method of a hyper-branched macromolecular adhesion promoter for paint. The preparation method comprises the following steps: a) under normal temperature and normal pressure, adding polyol ether, polybasic acid and a first catalyst into a four-mouth flask provided with a stirrer and a condensation device respectively; then introducing nitrogen gas into the four-mouth flask; b) raising the temperature of the four-mouth flask to be 90 DEG C to 250 DEG C and continually stirring under the normal pressure for 1h to 10h; then closing the nitrogen gas and vacuumizing for 1h to 5h; standing and naturally cooling a mixture to room temperature, so as to obtain a polyhydroxy hyper-branched polymer; c) adding a modifier and a second catalyst into the polyhydroxy hyper-branched polymer obtained in step b) and stirring at 50 DEG C to 200 DEG C for 1h to 10h; d) adding a solvent which accounts for 30 percent to 70 percent of the total mass of reactants and continuously stirring for 0.5h to 1h; then naturally cooling to the room temperature, so as to obtain the hyper-branched macromolecular adhesion promoter for the paint. The adhesion promoter prepared by the preparation method disclosed by the invention has a good adhesion property and also has good compatibility and storage stability.

The invention discloses a rubber material to make urban track vehicle rubber tire, which comprises the following parts: 100wt% polytetrahydropyrane glycol PTMG with molecular weight at 1000, 26.6-34wt% isocyanate TDI-100, 3.5-6.0% -NCO in the prepolymer and 9.5-18.1wt% MOCA of chain-expanding agent of prepolymer. The invention has higher strength and hardness and strong hydrolytic resistance, which can be applied under damp-heat condition for a long time to bond metal.

The invention discloses a preparation method of a catalyst for synthesis of PBT, and the method comprises the following steps: a compound whose structural formula is Ti(OR)4 and a dihydric alcohol are mixed, a reaction is carried out for 0.5-10 hours in a condition that the absolute pressure is 1-95kPa and the temperature is 60-210 DEG C, an obtained by-product ROH is removed, and the catalyst for synthesis of PBT is obtained, wherein, the mol ratio between dihydric alcohol and Ti(OR) is equal to or more than 1, and preferably the mol ratio between dihydric alcohol and Ti(OR)4 is 4:1-120:1. According to the invention, the titanium alkoxide catalyst whose traditional structural formula is Ti(OR)4 and dihydric alcohol are reacted, the dihydric alcohol titanium catalyst of which at least of one of the alkyloxy is replaced by dihydric alcohol is obtained; the catalyst has good hydrolysis resistance and catalytic activity, and thereby effectively inhibiting hydrolysis fouling of the catalyst, and reducing the amount of alkyl alcohol brought into the subsequent production along with the catalyst.

The present invention discloses a halogen-free, fire retardation, strengthening and anti-aging PBT composite material, which comprises, by mass, 60-85% of PBT, 8-15% of a halogen-free fire retardation agent, 5-15% of a strengthening agent, 2-5%of SMA, 0.5-2% of an anti-aging agent, 0.5-1.5% of carbodiimide, 0.1-0.5% of pyromellitic dianhydride, 0.1-0.5% of an antioxidant, and 0.1-1% of pentaerythrityl tetrastearate, wherein the halogen-free fire retardation agent is the complex comprising a bisphenol A-bis(diphenyl phosphate) fire retardation agent and a polydimethylsiloxane fire retardation agent according to a mass ratio of 2:1. The halogen-free, fire retardation, strengthening and anti-aging PBT composite material of the present invention has beneficial effects of excellent halogen-free fire retardation, excellent mechanical property, good processability, stable performance, strong hydrolysis resistance, excellent electrical performance, and low cost, can be used in the fields of electronic appliances, household appliances, machinery parts and the like, and has good practical values and prospects.

The invention provides a low-temperature-resistant hydrolysis-resistant glass fiber reinforced PBT and a preparation method thereof. The low-temperature-resistant hydrolysis-resistant glass fiber reinforced PBT comprises the following raw materials in parts by weight: 100 parts of polybutylene terephthalate PBT, 10-17 parts of zinc oxide modified glass fibers, 0.5-1.3 parts of iron-doped nano titanium dioxide, 2-5 parts of nano montmorillonite, 0.3-0.5 part of vinyltriacetoxysilane, 4.5-6 parts of a toughening agent and 0.3-0.6 part of an antioxidant. The PBT composite material prepared in theinvention has excellent mechanical properties, good low temperature resistance and high temperature resistance, strong hydrolysis resistance and excellent overall flame retardancy.

The invention discloses a sterilizing protective brush for a shopping mall escalator, and relates to related technical field of elevator materials. The sterilizing protective brush for the shopping mall escalator disclosed by the invention is prepared from the following components: acrylic resin, Hu mulberry powder, turpentine, paraffin, trisodium phosphate, ethyl alcohol, deionized water, propylene bituminous resin, alkali solution, polycarbonate, broussonetia papyrifera bark powder, sandalwood bark powder, reed straw powder, an adhesive, a stabilizing agent, carbohydrase, blood enzyme, an active auxiliary agent, polyethylene wax, carboxymethyl cellulose, pyridine butadiene rubber, an anti-aging agent, camphor, staphylococcus aureus-dissolving enzyme, superoxide dismutase, lysozyme, matrigel, and 0.1 mol/l phosphate buffer solution. The sterilizing protective brush disclosed by the invention achieves a protecting effect when an escalator is used, can also inhibit the production of bacteria, and can purify the environment; moreover, the sterilizing protective brush has high efficiency, impact resistance, environment friendliness, toughness, bacterium removing property, and fatigueresistance.

The invention relates to the field of a purifier, and discloses a wall-hung direct drinking water dispenser. In a water purification process, in a water flow direction, the water dispenser comprises a PP fiber filter core, a composite filter core, an ultrafilter membrane filter core and an antibacterial filter core which are connected in sequence. The composite filter core is made from a hollow active carbon outer filter core and a ceramic inner filter core filling the hollow active carbon outer filter core. The antibacterial filter core is made from a multiple hydrous reduction antibacterial material and a multiple ion antibacterial material. The direct drinking water dispenser is provided with a PP fiber filter core, a composite filter core, an ultrafilter membrane filter core and an antibacterial filter core in sequence, and is small in size, good in antibacterial effect, high in water outlet rate, and less in waste water production. The purified water drinks good, contains microelements required by human body, and is beneficial for health.

The invention discloses a method for preparing a phosphorylation-modified composite high-toughness storage battery case. The method comprises the following steps: (1) preparing a primary storage battery case; and (2) spraying the surface of the prepared primary storage battery case with a coating; the prepared phosphorylation-modified composite high-toughness storage battery case has heat resistance, toughness, weather resistance, high temperature resistance, acid and alkali resistance, oil resistance, halogenated hydrocarbon corrosion and strong hydrolysis resistance; and the preparation process is environmentally friendly, the equipment is simple, the operation is simple, and the preparation cost is low. The storage battery case is applied to storage battery liquid equipment, has high practical value, can alleviate the failure of the sealing glue joint of storage batteries due to external force impact or temperature shock, and can avoid the liquid leakage problems due to cracks of the storage battery case caused by various reasons in the production process.

The invention relates to an ionic liquid which is a 1-ethyl-3-methylimidazole tertfluoborate ionic liquid with the molecular formula C6H11BF4N2. The 1-ethyl-3-methylimidazole tertfluoborate ionic liquid can be used as a conductive treating agent in SEM-EDX detection. The ionic liquid has the beneficial effects that conductive treatment with the conductive treating agent has the advantages of low cost and simple operation, and the application range of SEM-EDX detection is greatly expanded.

The invention provides a preparation method of an alkyl ketene dimer papermaking sizing agent. The preparation method comprises the following steps: mixing a hectorite aqueous dispersion with acetone, ammonia monohydrate and hexadecyl trimethyl siloxane, and carrying out ultrasonic dispersion to obtain a mixed solution I; adding tridecafluorooctyltriethoxysilane into the mixed solution I, and carrying out ultrasonic dispersion to obtain a mixed solution II; drying the mixed solution II to obtain modified hectorite powder; mixing the modified hectorite powder with perfluorohexane, carrying out ultrasonic dispersion, adding molten AKD, conducting mixing and heating, and carrying out ultrasonic emulsification to obtain an AKD-A emulsion; and mixing the AKD-A emulsion with a sodium dodecyl sulfate aqueous solution, and carrying out ultrasonic emulsification to obtain the alkyl ketene dimer papermaking sizing agent. The sizing performance of the AKD emulsion prepared by the method disclosed by the invention is remarkably improved, and meanwhile, the hydrolysis resistance and emulsion stability of the AKD can be greatly improved; and the AKD sizing agent emulsion disclosed by the invention is simple in preparation process, low in emulsifying cost and good in sizing effect, and the dosage of an emulsifying agent is small.

The invention discloses high-physical-property graphene synthetic leather, a preparation method and equipment; the high-physical-property graphene synthetic leather is prepared from dyed gray leather,graphene powder, concentrated sulfuric acid, potassium permanganate, a polyurethane prepolymer, modified graphene monomers of -OH, a salt forming agent and water. The invention also discloses the preparation method of the high-physical property graphene synthetic leather, which comprises the steps of S1, carrying out hydrophilic modification on graphene; S2, carrying out lipophilic modification,and introducing active groups; S3, preparing a polyurethane prepolymer; S4, acquiring an aqueous polyurethane emulsion coating agent; and S5, carrying out coating. The preparation method disclosed bythe invention is more scientific and reasonable, the wear resistance and scratch resistance of the leather are effectively improved, the hydrolysis resistance is strong, the leather is antibacterial and anti-mildew, the leather has good inhibiting and killing effects on Staphylococcus aureus, Klebsiella pneumoniae, Escherichia coli, mixed molds and the like, and the antibacterial rate is higher than 99%; the anti-mildew grade reaches 1-0, the preparation equipment heats the material uniformly in the preparation process so that the preparation quality is improved.