91 results about "Poly di methyl siloxane" patented technology

The invention relates to the field of wear-resistant fabrics, and discloses a high-strength wear-resistant fabric and a preparation method thereof.The high-strength wear-resistant fabric comprises a surface coating and a base cloth layer, the surface coating and the base cloth layer are formed by coating and drying modified waterborne polyurethane emulsion, and the modified waterborne polyurethane emulsion comprises isophorone diisocyanate, ethylene glycol terephthalate, 2, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate, polyisobutylene glycol monoisobutyrate, according to the present invention, 2, 2-dimethylolpropionic acid, a modified additive, a flame retardant modifier, 1, 4-butanediol, trimethylolpropane and the like are adopted to prepare the modified additive, dopamine is subjected to in-situ auto-polymerization on the surface of a titanium dioxide nanotube, nano-silica is grown on the surface in situ, and modification is performed through a polysiloxane solution to prepare the modified titanium dioxide nanotube flame retardant; the polysiloxane solution is prepared by carrying out a reaction on methyl triethoxysilane and dihydroxyl-terminated polydimethylsiloxane; the flame-retardant modifier is prepared by reacting 2-chloro-4, 6-diamino-1, 3, 5-triazine, 5-hydroxymethylfurfural and phosphorous acid, so that the fabric is endowed with good mechanical properties and wear resistance, and the fabric has a hydrophobic surface and is excellent in flame retardance and durability.

The invention discloses a self-aggregation weak-consolidation multifunctional sand control agent and application thereof, and belongs to the technical field of oil gas chemistry. The sand control agent is prepared by simply mixing 0.2-0.6 part by weight of a hydrophobic modifier, 0.6-1.2 parts by weight of a chemical modifier and 2-4 parts by weight of an organic solvent. The hydrophobic modifier is selected from one or more of the following components: methacryloyloxy silane, heptadecafluorodecyl trimethoxy silane, amino alkyl polydimethylsiloxane, octamethylcyclotetrasiloxane, poly [3-((2-aminoethyl) amino) propyl] methyl (dimethyl) siloxane, gamma-propyl trimethoxy silane and the like; the chemical modifier is a compound containing alkenyl. The sand control agent can be used for coating modification of a proppant, self-aggregation and clustering in water are realized, and solidified sand is formed through polymerization of the alkenyl-containing compound on the surface, so that the sand control effect is achieved; the sand control agent can also be directly added into fracturing fluid and permeates into a stratum to form a hydrophobic consolidation layer, so that the effect of stabilizing a rock wall surface is achieved.

The invention belongs to the field of organic silicon synthesis, and particularly relates to a preparation method of low-cost, low-ring-body and ultralow-viscosity dimethyl silicone oil, and the viscosity of the dimethyl silicone oil is smaller than or equal to 10 cSt. The preparation method comprises the following steps: firstly, adding a hydroxyl-terminated polydimethylsiloxane linear body, a chain stopper and an activated catalyst into a reaction kettle, and carrying out hydroxyl condensation and chain segment equilibrium reaction under a negative pressure condition to obtain a polymerization precursor; then adding an end-capping reagent into the polymerization precursor, carrying out chain segment rearrangement reaction, after the reaction is finished, adding a terminator and a quenching catalyst to obtain a polymerization intermediate, and further separating to obtain a target product. The preparation method provided by the invention has the advantages of simple process, mild conditions, 100% of raw material utilization rate, and no generation of cyclosiloxane, and is suitable for green industrial production of ultralow-viscosity methyl silicone oil.

The invention discloses a phenolphthalein-based polyaryletherketone polymer and a preparation method thereof, and the phenolphthalein-based polyaryletherketone polymer is prepared from the following raw materials: 240 to 370 parts of phenolphthalein monomer, 45 to 150 parts of modified phenolphthalein, 140 to 220 parts of 2, 6-dichlorobenzonitrile and 3 to 12 parts of alkyl halide. The modified phenolphthalein is prepared from phenolphthalein and a modifier; the modifying agent is selected from at least one of 3-amino propyl trimethoxy silane, 3-amino propyl triethoxy silane, bis (aminopropyl) polydimethylsiloxane, and aminopropyl terminated polydimethylsiloxane. By introducing a siloxane side chain and a cyano side bond and using long-chain aliphatic hydrocarbon for end capping, the bonding capacity of the polymer and other materials is improved, and meanwhile, the high temperature resistance and toughness of the polymer are kept.

The invention provides a polylactic acid-plant fiber environment-friendly flame-retardant material for plates as well as a preparation method and application thereof. Polydimethylsiloxane with reactive functional groups at two ends is used as a modifier for the polylactic acid composition, and a polysiloxane chain segment is introduced into a main chain of a polylactic acid molecule, so that the elongation at break, the impact strength and the heat resistance of the polylactic acid-plant fiber environment-friendly flame-retardant material are improved. For plant fibers, pectin components in the plant fibers are removed through alkali treatment, then an organic silicon coupling agent is used for treatment, the organic silicon coupling agent and hydroxyl groups of cellulose form a multi-site hydrogen bond coupling effect, the organic silicon coupling agent is adsorbed on the surface of the cellulose, and therefore the compatibility of the cellulose and polylactic acid molecules modified by polysiloxane chain segments is improved; therefore, the mechanical property, heat resistance and flame retardance of the environment-friendly flame-retardant material are further improved.

The invention relates to a film-forming composition used in cosmetics, the film-forming composition comprises a film-forming agent, a first auxiliary agent and a second auxiliary agent, the film-forming agent is selected from a copolymer of acrylic acid (ester) and siloxane, and the second auxiliary agent is selected from a copolymer of acrylic acid (ester) and siloxane. The first auxiliary agent is selected from acrylic acid (ester) / stearyl alcohol acrylate / polydimethylsiloxane methacrylate copolymer and / or acrylic acid (ester) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer, and the second auxiliary agent is selected from squalane and / or synthetic phospholipid biomimetic materials. The content of the film-forming agent is 1.2 to 4 parts by weight, the content of the first auxiliary agent is 0.11 to 2 parts by weight, and the content of the second auxiliary agent is 0.0035 to 1.5 parts by weight. The invention also relates to cosmetics. According to the invention, the film-forming agent, the first auxiliary agent and the second auxiliary agent are cooperatively used in a specific proportion, so that the cosmetic containing the film-forming composition has excellent air permeability, makeup holding performance and skin feeling comfort.

The invention provides a marine antifouling coating with an active-passive synergistic mechanism and a preparation method thereof.The preparation method comprises the steps that a porous template, ruthenium selenide and absolute ethyl alcohol are mixed and stirred to obtain a mixed solution, and the mixed solution is continuously heated to obtain mixed powder; placing the mixed powder and selenium powder in two crucibles respectively, and placing the crucibles in a tubular furnace for heating and calcining to obtain template-loaded ruthenium selenide; soaking the template-loaded ruthenium selenide in a concentrated alkali solution, heating to remove the porous template, and filtering, washing and drying after etching to obtain porous ruthenium selenide; the preparation method comprises the following steps: dissolving vinyl-terminated polydimethylsiloxane, a photoinitiator and polymercaptopropyl methyl siloxane in cyclohexane to obtain a coating base solution, adding porous ruthenium selenide into the coating base solution, uniformly stirring, carrying out ultrasonic treatment, and carrying out vacuum defoaming to obtain a coating solution; and coating the coating liquid on the surface of a base material, and curing after ultraviolet irradiation to obtain the marine antifouling coating with an active-passive synergistic mechanism.

The invention relates to the technical field of cosmetics, and particularly discloses anti-wrinkle cream containing sequoia stem fermentation products and a preparation method of the anti-wrinkle cream. The wrinkle removing cream containing the sequoia stem fermentation product is prepared from the following raw materials in percentage by mass: a material A: glycerol, butanediol, p-hydroxyacetophenone YS028, an ammonium acryloyldimethyl taurate / VP copolymer, p-hydroxyacetophenone YS008 and the balance of water; the material B is prepared from cetostearyl alcohol, an emulsifying agent MONTANOV202, butyrospermum parkii butter, isopropyl myristate, C10-18 fatty acid triglyceride, polydimethylsiloxane, ethylhexyl palmitate and XIAMETERPMX-0345Z Fluid; the material C is prepared from a material D and a material E; the material C is prepared from a sequoia stem fermentation product, Naturalpenet 2020 and SEPIGEL305; the material D is prepared from YONOME SPE II, Alps mountain leucas, ULA-L1004 coated ceramide, anti-wrinkle base peptide, super-oinmetidyl-D2, Chinese prescription hexyl A powder, XYREPIOR, annoine TM, essence and methyl dihydrojasmonate; the material D is prepared from YONOME SPE II, Alps mountain leucas, ULA-L1004 coated ceramide, anti-wrinkle base peptide, super-oinmetidyl-D2, Chinese prescription hexyl A powder, XYREPIOR, annoine TM In addition, the preparation method has the advantage of improving the wrinkle removing effect of the wrinkle removing cream.

The invention belongs to the technical field of polyimide materials, and particularly relates to an interpenetrating network type polyimide material as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out first polycondensation on pyromellitic dianhydride and 4, 4 '-diaminodiphenyl ether to obtain first polyamide acid; performing first cross-linking on the first polyamide acid under the action of a first cross-linking agent to obtain a first cross-linked network; carrying out second polycondensation on the amino-terminated poly (dimethyl siloxane) and 4, 4 '-(hexafluoroisopropenyl) diphthalic anhydride to obtain second polyamide acid; mixing the first polyamic acid and the second polyamic acid for pre-reaction, and then adding a second cross-linking agent for second cross-linking to obtain a precursor solution; and carrying out imidization on the precursor solution to obtain the interpenetrating network type polyimide material. The interpenetrating network type polyimide material obtained by the preparation method provided by the invention realizes synergistic enhancement of strength and toughness.

The present invention belongs to the technical field of cosmetics, and discloses a shell material for encapsulating water-soluble active ingredients, an elastomer composition including the shell material, and a dispersion system including the elastomer composition. An aqueous phase is encapsulated within the shell material, and the shell material is composed of a polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer and octyl poly(dimethylsiloxane) ethoxylated glucoside. Based on this special shell material, it has both lipophilic siloxane groups, methyl groups, octyl groups, and hydrophilic glucoside groups, which can very well connect water-soluble active ingredients and the shell material polydimethylsiloxane / vinyltrimethoxysiloxysilicate cross-linked polymer, enhancing the stability and dispersibility of water-soluble active ingredients. At the same time, the uses of the dispersion system and skin care products are also provided.

The invention discloses snowflake cream with pearly luster and a preparation process of the snowflake cream. The snowflake cream comprises the following raw material components: a phase A: water; butanediol; glycerol; methyl glucitol polyether-20; a polyacrylate cross-linked polymer-6; sodium hyaluronate; potassium hydroxide (90%); 4-hydroxyacetophenone; xanthan gum; phase B: caprylic / capric triglyceride; cetostearyl alcohol; stearic acid; a polydimethylsiloxane; squalane; simmondsia chinensis seed oil; mineral oil; and polyethylene glycol (PEG)-100 stearate. Glyceryl stearate; tocopheryl acetate; isononyl isononanoate; a phase C: 1, 2-hexanediol; carnosine; a centella asiatica extract; collagen; the snowflake cream has the advantages of uniform pearly luster texture and the advantages of traditional snowflake cream.

The invention relates to the technical field of composite wall materials, in particular to a flame-retardant and anti-aging composite wall material and a preparation process thereof. The waterproof coating comprises the following components: 0.5 to 1.5 parts by weight of an antioxidant, 13 to 17 parts by weight of Portland cement, 2 to 4 parts by weight of epoxy resin, 1 to 3 parts by weight of polyurethane, 0.8 to 1.2 parts by weight of an ethylenediamine curing agent, 2 to 6 parts by weight of glass fiber, 4 to 8 parts by weight of aluminum hydroxide, 3 to 11 parts by weight of 2-diphenylphosphine ethanethiol, 2 to 4 parts by weight of a polydimethylsiloxane waterproof agent and 2-(2-diphenylphosphine ethanethiol). The component A comprises the following components in parts by weight: 0.1-0.5 part of 2 '-hydroxy-5'-methylphenyl) benzotriazole, 0.2-0.4 part of lauryl sodium sulfate and 55-65 parts of a fly ash filling material; wherein the antioxidant is prepared by mixing amifostine mercaptan and a coupling agent according to a molar ratio of 1: (1.0-1.2); the coupling agent is prepared by mixing hexamethylene diisocyanate and gamma-glycidyl propyl trimethoxy silane; the curing agent is a mixture of a curing agent and a curing agent; the antioxidant is adopted, so that the anti-aging and flame-retardant effects of the wall material are improved, the interface compatibility is improved, and the stability of the material is improved.

The invention relates to the field of heat-conducting silicone grease, and discloses low-thermal-resistance heat-conducting silicone grease and a preparation method thereof. The heat-conducting silicone grease with low thermal resistance is prepared from the following raw materials in parts by weight: 100 to 120 parts of silicone oil polymer, 135 to 150 parts of heat-conducting filler, 4 to 6.5 parts of methylcyclosiloxane, 2 to 4 parts of alkyl alkoxy silane and 0.2 to 0.4 part of lubricating additive, the silicone oil polymer is prepared from trimethyl trivinyl cyclotrisiloxane, vinyl terminated polydiphenyl siloxane-polymethylvinyl siloxane block polydimethylsiloxane, trimethylolpropane diallyl ether, hydrogen-containing silicone oil and a platinum catalyst through a reaction. The heat-conducting silicone grease prepared by the invention has relatively good thixotropy, heat conductivity and low-heat-resistance stability, and silicone oil is not easy to separate out in a long-term cold and hot cycle use process.

This invention discloses an anionic hydroxyl silicone oil emulsion and its preparation method, relating to the field of polysiloxane emulsion technology, and belonging to patent classification number C08G77 / 04. The preparation method is as follows: Triethanolamine dodecylbenzenesulfonate salt, tridecyl alcohol polyether, and deionized water are mixed and dissolved, heated, and polydimethylsiloxane alcohol is added under high-speed shearing for homogenization. Water is added and the reaction is maintained at a constant temperature to obtain a basic emulsion. γ-(methacryloyloxy)propyltrimethoxysilane is added dropwise to react and obtain an interface-reinforced emulsion. Acrylamide, N-hydroxymethylacrylamide, etc., are pre-emulsified and then added to the interface-reinforced emulsion with ammonium persulfate under nitrogen protection. Polymerization forms a cross-linked polymer shell. After cooling, tert-butylhydroquinone and disodium ethylenediaminetetraacetate are added to obtain an antioxidant emulsion. Phenoxyethanol and octyl glycol are added to obtain the final emulsion. This method significantly improves the thermal stability of the emulsion through the synergistic effects of composite emulsification, interface reinforcement, shell protection, and antioxidant properties, making it suitable for high-temperature environments.

The application belongs to the field of polyurethane elastomers, and discloses a self-healing polyurethane elastomer in a liquid environment, and a preparation method and application thereof. The main chain structure of the self-healing polyurethane elastomer is polyurethane-urea with polydimethylsiloxane (PDMS) as a soft segment, diisocyanate and 3,3'-dithiodipropionyl hydrazine (DPH) as hard segments. The hydrophobic PDMS soft segment in the main chain not only provides high elasticity and realizes efficient closure, but also prevents water molecules from penetrating into the polymer network, thereby accelerating the synergistic self-healing process of the dynamic covalent bond (-S-S-) and high-density hydrogen bonds in the hard segment. The self-healing polyurethane elastomer has excellent mechanical properties, biocompatibility and self-repairing ability in a wet environment in vivo, and is particularly suitable for the rapid closure and functional recovery of frequently punctured or damaged parts in biological medical devices such as hemodialysis, artificial blood vessels, heart stents and heart valves.

This invention discloses a fluorine-free waterproofing agent and its preparation method, relating to the field of waterproofing agent technology. The preparation method involves mixing nano-silica with acrylate-terminated polydimethylsiloxane, octadecyl methacrylate, and methacryloxypropyltrimethoxysilane, followed by dropwise addition of azobisisobutyronitrile (AIBN) to obtain an organic-inorganic hybrid prepolymer acetone solution. Polycaprolactone diol, isophorone diisocyanate, and dibutyltin dilaurate react to prepare a polyurethane prepolymer. The mixture is then cooled and reacted with dimethylolpropionic acid and acetone, followed by further cooling, neutralization, and emulsification to obtain an aqueous polyurethane dispersion. This dispersion is then emulsified with the hybrid prepolymer, reacted with methyl methacrylate and hydroxyethyl acrylate, and finally reacted with glycerol polyglycidyl ether to obtain a composite emulsion. An antifoaming agent, leveling agent, and bactericide are added to the composite emulsion to obtain the fluorine-free waterproofing agent. The waterproofing agent of this invention provides durable waterproofing performance after being applied to fabrics.

The invention belongs to the technical field of cosmetics, and discloses a vitamin E emulsion and a preparation method thereof, the vitamin E emulsion comprises the following components by mass: 0.5-2 wt% of vitamin E and derivatives thereof, 10-20 wt% of a stabilizer, 10-20 wt% of a humectant, 3-6 wt% of an emulsifier, 0.3-1 wt% of a thickener, 0.5-1 wt% of a preservative, and the balance of water; wherein the vitamin E and the derivative thereof comprise at least one of vitamin E, tocopheryl acetate, tocopheryl linoleate, tocopheryl nicotinate and tocopheryl phosphate; the stabilizer comprises at least one of petrolatum, polydimethylsiloxane, hydrogenated polyisobutene, caprylic / capric triglyceride and butyrospermum parkii butter. Through the components, the antioxidant activity of vitamin E in the storage and skin retention process of the vitamin E milk can be effectively maintained.

The invention relates to the technical field of cosmetics, and discloses an oil wax composition of a high-water-holding complex stably-loaded water active matter and a preparation method, the oil wax composition of the high-water-holding complex stably-loaded water active matter comprises a high-water-holding complex, an oil wax phase and a water-based active matter phase, the high water holding complex comprises polyglycerol-2 dipolyhydroxystearate, polyglycerol-10 eicosanoic acid ester / tetradecanedioic acid ester, polyglycerol-3 rice bran acid ester, 1%-6% of polyglycerol-6 polyricinoleate, bis-behenyl alcohol / isostearyl alcohol / phytosterol dimer linoleate, dipentaerythritol hexahydroxy stearate / hexastearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate, polyglyceryl tristearate and polyglyceryl tristearate. According to the lip care composition, a water-based active matter phase can be stably borne in a high-load mode, water-based activity is effectively conveyed to the lip surface in the using process, and therefore the moisturizing, repairing and functional care effects of the lip are remarkably improved.

The invention discloses a cosmetic composition and application thereof in preparation of a hormone regulator. The cosmetic composition is prepared from the following components in percentage by mass: 8.4%-11.6% of a hormone regulator, 9%-11% of a humectant, 13.95%-19.25% of an emollient, 0.2%-0.4% of an inflammation inhibitor, 1.0%-1.5% of an emulsifier, 2%-3% of a skin conditioner and the balance of water, the hormone regulator is prepared from the following components: a radix puerariae extract compound, a dioscorea villosa root extract compound, a wild soybean seed extract compound, a cimicifuga racemosa root extract, a red clover extract compound and an emollient, the moisturizing cream is prepared from a moisturizing cream compound, an emollient compound, octyl polymethylsiloxane, isononyl isononanoate, dicapryl carbonate, polydimethylsiloxane, squalane, tocopheryl acetate and bergamot fruit oil. The cosmetic composition provided by the invention is used for regulating the endocrine (hormone) balance of a human body, and organically combines the concepts of life cultivation and health preservation and skin beautifying, so that the disordered endocrine recovers balance, and the body function returns to a young state.

The invention provides an anti-aging repairing face cream added with NAD + composition and a preparation process of the anti-aging repairing face cream. The anti-aging repairing face cream is prepared from the following components in parts by weight: 20 to 30 parts of NAD < + > composition, 2 to 6 parts of caprylic / capric triglyceride, 1 to 3 parts of non-ionic surfactant, 1 to 4 parts of emulsifier, 4 to 8 parts of oleic acid / linoleic acid / linolenic acid polyglycerol ester, 1 to 6 parts of dimeric pentaerythritol hexaprylate / hexapric acid ester, 0.1 to 1.5 parts of potassium lauroyl wheat amino acid, 2 to 8 parts of polydimethylsiloxane, 1 to 3 parts of 1, 2-propylene glycol and the balance of water. The invention relates to an environment-friendly plastic which is prepared from the following raw materials in parts by weight: 2 to 6 parts of 1, 2-hexanediol, 1 to 4 parts of polyethylene glycol-8, 2 to 6 parts of lauroyl lysine, 0.1 to 1 part of p-hydroxyacetophenone, 1 to 4 parts of potassium cetyl phosphate, 0.1 to 1 part of acrylic acid (ester) / C10-30 alkanol acrylate cross-linked polymer, 3 to 9 parts of sodium polyacrylate grafted starch, 0.5 to 2 parts of xanthan gum, 0.1 to 0.5 part of daily essence, 0.01 to 0.1 part of sodium hydroxide and 0.1 to 0.5 part of tetrasodium glutamate diacetate. The face cream prepared by the preparation method disclosed by the invention has the effects of resisting aging, moistening and preserving moisture on facial skin.

The invention relates to the field of daily chemical products, and particularly discloses a bartana oil hair heat protection hair conditioner and a preparation method thereof, the bartana oil hair heat protection hair conditioner comprises the following components: a group A: water, cetrimonium chloride and hydroxyethyl cellulose; the group B is prepared from the following raw materials: PEG-50 shea butter, a papain oil nutrient solution, a siloxane emulsion, glyceryl stearate, PEG-20 stearate, p-hydroxyacetophenone, PEG-50 stearate, polydimethylsiloxane alcohol and PEG-100 stearate; group C: essence and phenoxyethanol; group D: panthenol, hydrolyzed keratin, vitamin complex, tridecanol polyether-12, ethylhexylglycerin, citric acid and natural carotene; the added siloxane emulsion and the bartana oil nutrient solution form a double-membrane structure, the double-membrane structure can penetrate into hair cuticle gaps to fill up damaged areas, a hydrophilic-hydrophobic composite membrane is constructed on the surface of hair, the heat conduction efficiency is reduced, the heat insulation threshold value of the hair conditioner is increased, and the prepared hair conditioner has the three-effect-in-one deep repairing and nourishing effects of heat insulation, repairing and scalp protection.

The invention relates to a silicone rubber adhesive and a preparation method thereof, and relates to the technical field of silicone rubber adhesives, the silicone rubber adhesive comprises the following components: 100 parts of hydroxyl-terminated polydimethylsiloxane and nano calcium carbonate, and 40-60 parts of nano calcium carbonate; 2 to 3 parts of methyl trimethoxy silane; 1 to 2 parts of bis (ethyl acetoacetate) diisopropyl titanate; 0.3 to 0.7 part of a tackifier; the tackifier comprises a compound with a structural general formula as shown in a formula I or a formula II. Compared with the existing silicone rubber adhesive, the silicone rubber adhesive provided by the invention contains the tackifier with a specific structure, so that the construction speed can be remarkably increased, the use requirement of rapid construction is met, and the defects of the existing silicone rubber adhesive are overcome.

The invention belongs to the technical field of cosmetics, and discloses a shell material for wrapping a water-soluble functional component, an elastomer composition comprising the shell material and a dispersion system comprising the elastomer composition. The shell material is prepared from a polydimethylsiloxane / vinyl trimethylsiloxy silicate ester cross-linked polymer and octyl polydimethylsiloxane ethyoxyl glucoside. Based on the special shell material, the composite material has two groups, namely an oleophylic siloxane group, a methyl group, an octyl group and a hydrophilic glucoside group at the same time, so that the composite material can be well connected with a water-soluble functional component and a shell material polydimethylsiloxane / vinyl trimethylsiloxy silicate ester cross-linked polymer; the stability and the dispersity of the water-soluble functional components are enhanced. Meanwhile, the invention further provides application of the dispersion system and a skin care product.

The invention discloses essence containing mint and chrysanthellum indicum rose essential oil, the essence comprises a liquid part and an oil body part, the liquid part comprises water, propylene glycol, butanediol, glycerol, tremella fuciformis seed extract, triethanolamine, methylparaben, carbomer, xanthan gum and trace components; the oil body part is prepared from cyclomethicone, polydimethylsiloxane, vanillyl butyl ether and rose oil. The trace components comprise capryloyl hydroximic acid, glycerol caprylate, sodium polyacrylate, a chrysanthellum indicum extract, a mint extract, a portulaca oleracea flower / leaf / stem extract, a pelargonium graveolens extract, sodium hyaluronate, lactose, hydroxypropyl methyl cellulose, tocopheryl acetate, ascorbyl palmitate, CI 77007, an aloe barbadensis leaf extract and a radix sophorae flavescentis extract.

The invention discloses a method for low-temperature rapid catalytic degradation of silicone rubber, and belongs to the technical field of resource utilization of waste silicone rubber. According to the method, trifluoromethanesulfonic acid (HOTf) and metal halide zinc chloride are adopted to construct a concerted catalysis system, so that breakage and cyclization of a siloxane main chain can be realized within 10-20 minutes at the low temperature of 25 DEG C, and a siloxane product with octamethylcyclotetrasiloxane (D4) and cyclopentasiloxane (D5) as main components is generated. Compared with an existing Lewis acid system, the synergistic system still shows remarkably improved degradation rate and higher cyclization selectivity under a low-temperature condition. The method provided by the invention is suitable for linear, cross-linked and filler-containing waste silicone rubber, the process is mild and safe, the operation is convenient, and the obtained siloxane product can be directly used for regeneration and cyclic utilization of an organic silicon material.

This invention discloses a herbal skin-nourishing cream based on bamboo shoot extract as a solvent and its preparation method. The herbal skin-nourishing cream comprises an oil phase: petrolatum, squalane, dioctyl ether, glyceryl stearate, PEG-100 stearate, hydroxypinazone retinate, natural emulsifier, beeswax, tocopherol, cyclopentamethoxysiloxane, and oil-soluble fragrance; ethylhexylglycerin, niacinamide, and 10% citric acid are used to adjust the pH to 6.0-6.3. The aqueous phase comprises: pentylene glycol, panthenol, capryloyl hydroxamic acid, sodium hyaluronate, xanthan gum, dipotassium glycyrrhizate, sodium chloride, phenoxyethanol, p-hydroxyacetophenone, cellulose gum, and disodium EDTA; the balance is bamboo shoot extract. The average particle size of this invention is 1-5 μm, and the viscosity is 5000-8000 mPa·s. It has undergone heat resistance, cold resistance, centrifugal stability tests, and preservative challenges, demonstrating no stratification or deterioration. Human patch tests have proven its suitability for sensitive skin.

The invention discloses a multi-effect hair-care essence, the multi-effect hair-care essence is composed of a water phase component, an oil phase component, an active component and an additive, the water phase component comprises 60%-70% of deionized water, 0.05%-0.15% of sodium hyaluronate, 1%-3% of panthenol and 1%-2% of hydrolyzed wheat protein; the oil phase component comprises 3%-5% of Argan oil, 2%-4% of olive oil, 2%-4% of macadamia nut oil and 1%-3% of cyclopentasiloxane; the active ingredients comprise 0.5%-1% of caffeine and 0.5%-1.5% of nicotinamide; the additive comprises 1%-2% of an emulsifier, 0.1%-0.3% of a thickening agent and 0.3%-0.5% of a preservative. The hair conditioner is reasonable in design, can fill up the damage of hair scales, is beneficial to the growth and health of hair, can be quickly absorbed by the hair, supplements hair lipid, nourishes hair follicles, improves the problems of dryness and fragility of the hair, enables the hair to be smoother and tough, has good moisturizing and repairing effects, reduces broken hair, and fundamentally improves the hair quality.

The invention provides a preparation method of a beta-1, 3 / alpha-1, 3-glucan microneedle, which comprises the following steps: dissolving low-molecular-weight sodium hyaluronate and high-molecular-weight sodium hyaluronate in a weight ratio of 5: 1 in deionized water, and fully stirring to obtain a hyaluronic acid hydrogel solution with the concentration of weight relative to volume of 20%; adding beta-1, 3 / alpha-1, 3-glucan into the obtained hyaluronic acid hydrogel solution, and fully stirring to obtain a uniform solution; carrying out continuous twice vacuum treatment and bubble pre-removal treatment on the prepared uniform solution; adding the uniform solution into a polydimethylsiloxane female die, and carrying out vacuum treatment and bubble removal treatment twice continuously; shoveling off the solution of the substrate of the polydimethylsiloxane female mold, and adding a pure sodium hyaluronate solution; drying treatment is conducted at the drying temperature within the normal body temperature range of the human body, and the microneedles are stripped from the female die after drying is completed; the microneedle obtained through the steps can meet the requirement of serving as a percutaneous drug delivery instrument.

The invention belongs to the technical field of modified shield soil recycled coarse aggregates, and particularly relates to a preparation method and application of a modified shield soil recycled coarse aggregate, and the preparation method comprises the following steps: 1) preparing a modification liquid from poly (dimethyl siloxane), bis (3-aminopropyl) terminated, linear novolac epoxy resin, a nano filler and an organic solvent; and 2) dipping the shield soil recycled coarse aggregate in the modification liquid, stirring under an ultrasonic condition, taking out, and drying to obtain the modified shield soil recycled coarse aggregate. The poly (dimethyl siloxane), the bis (3-aminopropyl) end cap, the linear novolac epoxy resin and the nano-filler fully permeate into pores and gaps of the shield soil recycled coarse aggregate, and the nano-filler physically blocks the internal pores, repairs micro-cracks and reduces the water absorption rate; the siloxane chain segment of the amino-terminated silicon oil directionally forms a hydrophobic membrane, and the amino-terminated group and the linear novolac epoxy resin are cross-linked and cured to block moisture invasion; and the linear novolac epoxy resin firmly bonds the fragile part, so that the mechanical property and durability are improved.

The invention provides functional end hydrogen-containing silicone oil with high Si-H activity and a production process of the functional end hydrogen-containing silicone oil. The hydrogen-terminated silicone oil is prepared from the following components: 78 to 85 percent of octamethylcyclotetrasiloxane, 0.15 to 0.45 percent of a metal organic framework loaded diacid catalyst, 4 to 8 percent of an amino functionalized hydrogen-containing end-capping reagent, 2.5 to 6 percent of a polyether-siloxane block regulator, 1 to 3 percent of hexamethyldisiloxane, 1.5 to 4 percent of absolute ethyl alcohol and 0.3 to 0.8 percent of a weakly alkaline adsorbent. According to the invention, the hydrogen-terminated silicone oil is based on octamethylcyclotetrasiloxane, has a stable polydimethylsiloxane main chain skeleton, has a controllable molecular chain length, contains amino groups which can react with carboxyl and epoxy groups, and has wide functions and application scenes; the molecular weight distribution is easy to regulate and control, the polyether-containing chain segment has good hydrophilicity, and the block structure improves the high and low temperature resistance.