2462 results about "Methyl group" patented technology

A production method for an aqueous dispersion according to the present invention comprises polymerizing a first monomer that includes tetrafluoroethylene in the presence of a compound represented by formula (X) and a polymerization initiator under conditions in which an aqueous medium is present but an emulsifier that includes fluorine atoms is substantially absent to produce an aqueous dispersion that includes particles of a first fluorine-containing polymer that has an average particle diameter of no more than 500 nm and does not have a melting point.　Formula (X): C(X1)(X2)=C(X3)-L-Z. In formula (X), X1, X2, and X3 are each independently a hydrogen atom, a fluorine atom, a perfluoromethyl group, or an alkyl group, L is a single bond or a divalent linking group, and Z is an anionic group or a salt of an anionic group.

The invention provides a photosensitive resin composition containing a photobleaching aminomethyl anthracene photosensitizer and application thereof.The structural main body anthracene ring of the photosensitizer introduces an aminomethyl functional group to the 9th and / or 10th site: through introduction of the aminomethyl functional group, while the electron cloud density of polycyclic aromatic hydrocarbon is maintained, the maximum absorption wavelength is subjected to red shift, and the photosensitive resin composition is especially suitable for a 405nm illumination system; the initiation efficiency is obviously improved; the exposure energy is reduced; compared with an existing DBA type photoinitiator, the problem of alkoxy carbon-oxygen bond breakage caused by p-pi conjugation of DBA is avoided, generation of small molecule fragments is effectively inhibited, defects are reduced, and the yield is increased. In addition, compared with DPHA and DAcOA, the photosensitizer also shows better solubility and formula compatibility. The preparation method has the characteristics of simple preparation process and low cost, and can be widely applied to the photocuring fields of dry films, paints, coatings, printing inks, forming materials and the like.

The invention relates to the technical field of petrochemical engineering, and discloses a temperature-resistant anti-swelling agent for fracturing and a preparation process thereof.The preparation method comprises the steps that glycerol triglycidyl ether and diethanol amine are subjected to a ring-opening reaction, a polyhydroxy tertiary amine monomer is obtained, then the polyhydroxy tertiary amine monomer and chloromethylated polystyrene are subjected to a quaternization reaction, and the temperature-resistant anti-swelling agent for fracturing is obtained. Quaternary ammonium salt groups of the anti-swelling agent and negative charges on the surface of clay form electrostatic interaction, and hydroxyl groups and the surface of the clay form hydrogen-bond interaction, so that the anti-swelling agent can be firmly adsorbed on the surface of the clay to form a layer of polymer film, the clay is prevented from being in contact with water, the phenomenon that the clay swells when encountering water is effectively inhibited, and the anti-swelling rate is very high. And the anti-swelling agent contains a heat-resistant polystyrene molecular chain, has excellent high temperature resistance, can maintain good structural stability at high temperature, still maintains high anti-swelling rate, and is suitable for a fracturing fluid system for high-temperature oil reservoir exploitation.

The invention relates to the technical field of dielectric materials, and discloses polyimide, a polyimide film and a preparation method and application thereof, the polyimide is obtained by a polymerization reaction of a dianhydride monomer and a diamine monomer, the diamine monomer comprises a methylene bridging group and a phenyl group with a substituent group, and the methylene bridging group is a phenyl group with a substituent group. The substituent group at least comprises one methyl group. The molecular twisted conformation lock structure provided by the invention not only can improve the tolerance of polyimide, but also can doubly inhibit intrachain and inter-chain charge migration of the dielectric film, so that the dielectric film still has extremely high energy storage density and energy storage efficiency at a service temperature close to a glass-transition temperature.

The present invention relates to a preparation method of an intelligent self-repairing, flame-retardant and light-resistant water-based polyurethane coating. The method comprises the following steps: preparing a self-made hyperbranched flame retardant and using it in the synthesis of a polyurethane prepolymer; cooling the mixture to 58° C., adding 2,2-dimethylolpropionic acid, reacting the mixture for 1 to 2 hours, adding 1 to 2 parts of a disulfide compound, reacting the mixture for 1 to 2 hours at 60 to 80° C., adding 1 to 2 parts of a hydrogen bonding agent, reacting the mixture for 1 hour at 60 to 80° C., adding 0.5 to 1.5 parts of a coumarin derivative, and reacting the mixture for 60 to 90° C. The mixture was stirred for 1-2 hours, and then spiropyran, diethanol monoisopropanolamine, and 0.01 parts of p-toluenesulfonamide were added, and the mixture was reacted at 50°C for 30 minutes. The temperature was lowered to 40-45°C, and 1-2 parts of triethylamine were added, and the mixture was reacted for 1-2 hours. The mixture was cooled to room temperature, and 60-65 parts of water were added. The mixture was stirred at a speed of 1800-2000 r / min for 0.5-1 hour to obtain an intelligent self-healing, flame-retardant, and light-resistant water-based polyurethane coating. The flame retardancy and self-healing properties of the obtained water-based polyurethane were significantly improved.

The invention discloses a modified amine curing agent and a preparation method thereof, and an epoxy resin composite material and a preparation method thereof, and belongs to the field of resin and composite materials. According to the curing agent, a C2-C8 alkyl chain is grafted to a methylene site of 4, 4 '-diaminodiphenylmethane (MDA) through free radical substitution and alkylation reaction, and a molecular structure with a flexible alkyl chain and a rigid benzene ring is formed. The preparation method comprises the following two steps: generating a halogenated intermediate from MDA and a halogen simple substance under certain reaction conditions, alkylating the halogenated intermediate with a Grignard reagent (RMgX), and purifying. The curing agent and epoxy resin are compounded, heated and cured, so that the epoxy resin composite material has relatively high impact strength and fracture toughness, has good tensile strength and hardness, has double functions of reinforcing and toughening, and solves the problem that reinforcing and toughening of traditional epoxy resin are difficult to be compatible; the method is suitable for the fields of aerospace, composite material adhesives and the like with harsh requirements on mechanical properties.

The invention discloses a pure silicon Beta molecular sieve packaging metal catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving a silicon source, a template agent, a ligand, a metal salt and a mineralizer in water, carrying out a crystallization reaction at 120-200 DEG C, and carrying out calcination treatment and reduction treatment on the crystallized solid to obtain the pure silicon Beta molecular sieve packaging metal catalyst. The pure silicon Beta molecular sieve packaged metal catalyst is obtained. The pure silicon twelve-membered ring macroporous Beta molecular sieve encapsulated metal catalyst is prepared through a ligand protection in-situ hydrothermal synthesis strategy, so that the size of a metal nanocluster can be reduced, the high-temperature thermal stability of the metal nanocluster is improved, the adsorption and diffusion processes of guest molecules can be regulated and controlled, and the stability of the metal nanocluster is improved. Furthermore, the catalyst shows excellent catalytic performance when being used for catalyzing a propane dehydrogenation reaction and a methyl cyclohexane dehydrogenation reaction, and efficient and stable propane and methyl cyclohexane dehydrogenation performance is achieved.

The invention relates to the technical field of quantum computing and molecular electronic devices, in particular to a probabilistic bit device based on polyfluoroaryl methyl free radicals and a preparation method of the probabilistic bit device. According to the probabilistic bit device, the coupling efficiency of molecules and electrodes is improved by virtue of the characteristic that the paramagnetic unpaired electron spin state of tri (polyfluoroaryl) methyl free radical molecules can be used as a random expansion physical entropy source and high electronegativity and stability formed by modification of a plurality of strong electron-withdrawing fluorine atoms in the molecules. During the operation period of the device, the spin fluctuation can efficiently regulate and control tunneling current passing through molecules, promote random conversion between output high and low current states, show excellent random binary fluctuation characteristics, and simultaneously have high sensitivity and long coherence time. Compared with the prior art, the device has remarkable advantages in the aspects of device stability, energy efficiency ratio and external field controllability. The preparation method is simple and convenient to operate, mild in reaction condition and beneficial to large-scale production.

The invention discloses an organic electroluminescent material and an organic electroluminescent device and application thereof.The organic electroluminescent material can serve as a functional layer of the organic electroluminescent device, 9-alkyl-9-phenyl-9H-fluorene serves as a parent nucleus and is directly connected with arylamine on the parent nucleus, one side chain of the arylamine is aryl or heteroaryl, the other side chain of the arylamine is 1, 1, 4, 5, 6-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3-tetramethyl-1, 3-tetramethyl-1, 3-tetramethyl-1, 3-tetramethyl-1, 3-tetramethyl-1, 3-tetramethyl-1, 3-tetramethyl-1 Compared with other compounds, the organic electroluminescent material compound disclosed by the invention has the advantages that the transverse electric leakage is small, and the phenomena that adjacent pixels are lightened, transverse crosstalk is generated between adjacent sub-pixels and color display is influenced due to transverse leakage current of the adjacent pixels in a device can be reduced. The organic electroluminescent material is used as a functional layer of the organic electroluminescent device, and the problems that color display is affected and picture display is abnormal due to transverse electric leakage of an OLED display device can be solved.

A cosmetic containing (A) an alkali metal salt of an alkanoyl N-methyltaurine having an alkanoyl group having 8-20 carbon atoms, (B) a plant extract, (C) one or more compounds selected from the group consisting of compounds represented by general formula (1) and pharmacologically acceptable salts thereof, and (D) water (in general formula (1), R1, R3, R4 and R6 are each independently an alkyl group having 1-3 carbon atoms, R2 is an alkyl group having 1-3 carbon atoms, and R3 is an alkyl group having 1-3 carbon atoms; and R2 and R5 each independently represent a hydrogen atom or an alkyl group having 1-3 carbon atoms. ). # imgabs0 #

The invention belongs to the technical field of organic radiation luminescence and radiation imaging, and discloses an aggregation-induced delayed fluorescence (AIDF) type organic scintillator material and a preparation method thereof, and a preparation method and application of a flexible organic scintillation film. The molecular structure of the material comprises carbonyl, methylene, sulfuryl and other connecting units, phthalonitrile is used as an acceptor unit, carbazole is used as a donor unit, an aggregation-induced excitation state is formed through space charge transfer among molecules, efficient AIDF luminescence and large Stokes shift characteristics are realized, the self-absorption phenomenon is effectively avoided, and the luminescent efficiency is improved. The X-ray fluorescence probe is suitable for a luminescence process under an X-ray excitation condition, the sensitivity of X-ray detection is remarkably improved, and the lowest detection limit can reach 276nGy.s <-1 > and is far superior to the 5.5 mu Gy.s <-1 > standard required by medical diagnosis. Besides, the flexible scintillator film prepared based on the material system radiates and emits light within the waveband range of 450-750 nm and is perfectly matched with the response area of a silicon-based detector, X-ray imaging with the high signal-to-noise ratio is achieved, and the imaging resolution is as high as 20.01 lp.mm <-1 >.

The invention relates to the field of organic synthesis, in particular to a synthetic method of 1-(2, 6, 6-trimethyl-1, 3-cyclohexadiene-1-yl) ethanone, and particularly relates to a synthetic method of 1-(2, 6, 6-trimethyl-1, 3-cyclohexadiene-1-yl) ethanone by taking 4-acetyl-3, 5, 5-trimethylcyclohexene as a raw material and carrying out bromination and elimination steps to synthesize the 1-(2, 6, 6-trimethyl-1, 3-cyclohexadiene-1-yl) ethanone. The method has the advantages of easily available raw materials and high reaction yield, and can be industrially implemented on a large scale.

The invention relates to the field of electrochemical energy storage electrode materials, in particular to a method for preparing a coal-based carbon material through chemical crosslinking coupling high-temperature carbonization and application of the coal-based carbon material. The method comprises the following steps: crushing and deliming raw material coal to obtain ultra-pure coal powder; then dissolving the ultra-pure coal powder and a cross-linking agent in an organic solvent, under the action of a catalyst, inducing methyl, ethyoxyl, aldehyde and other groups to uniformly introduce polycyclic aromatic hydrocarbon molecules, and finally forming a super-cross-linked structure; and performing high-temperature carbonization to recombine the coal into closed pores, thereby forming the disordered coal-based carbon material with small microcrystal size. The method has the advantages that the raw material source is stable, the cost is low, the carbon yield is high, the treatment process is simple, large-scale preparation of the high-performance coal-based carbon material is easy to realize, and the like; and the prepared coal-based carbon material shows excellent electrochemical performance as a sodium ion / lithium ion battery negative electrode.

The invention relates to application of a heterocyclic compound as a fluorescent probe. The structural formula of the heterocyclic compound is shown as a general formula I, and R1, R2, R3, R4, R5, R6, R7 and R8 are independently one of hydrogen, alkyl, hydroxyl, phenyl, hydroxyphenyl, indole and oxymethyl. According to the present invention, the heterocyclic compounds represented by the general formula I can be specifically positioned in mitochondria, and have long fluorescence lifetime, such that the heterocyclic compounds are suitable for being used as mitochondria fluorescence probes.

The embodiment of the invention discloses a preparation method of trifluoromethyl sulfinate. The preparation method comprises the following steps: reacting a trifluoromethyl sulfinyl reagent with an amino compound containing hydroxyl to obtain a trifluoromethyl sulfinate intermediate; and reacting the trifluoromethyl sulfinate intermediate with alkali metal salt in an organic solvent to obtain the trifluoromethyl sulfinate. According to the embodiment of the invention, firstly, the trifluoromethyl sulfinyl reagent reacts with the amino compound containing the hydroxyl group to obtain the trifluoromethyl sulfinate intermediate, and then the trifluoromethyl sulfinate and the alkali metal salt react in the organic solvent, so that the high-purity trifluoromethyl sulfinate can be prepared with high yield under mild conditions. The yield and the purity of the target product are effectively improved, and meanwhile, the production condition requirement and the environmental pollution degree are reduced, so that large-scale production and application are facilitated.

The invention discloses a near-infrared two-region aggregation-induced emission material as well as a preparation method and application thereof, and belongs to the technical field of aggregation-induced emission materials. The invention provides a fluorescent material with aggregation-induced emission (AIE) property, which can have high luminous efficiency in an NIR-II (1000 nm to 1500 nm) region. The invention aims to carry out rational structure design through the multilevel space confinement effect of molecule and aggregate levels. Through modification of a methyl group and a side chain substituent group, free rotation of an aromatic ring is effectively inhibited, and a rigid mortise and tenon interlocking structure is formed in the crystal. The water-soluble nanoparticles prepared from the synthesized aggregation-induced emission material can achieve a fluorescence quantum yield of 28.2%. By utilizing the nanoparticles with high fluorescence efficiency, the application of real-time dynamic monitoring and the like on intestinal vessels of a living body can be realized, and a new method is provided for early diagnosis and surgical intervention of acute intestinal ischemia.

The invention relates to the technical field of polyurethane compositions, in particular to a chlorotrifluoropropene-based high-temperature-resistant polyurethane composition and a preparation process thereof, and the chlorotrifluoropropene-based high-temperature-resistant polyurethane composition comprises the following raw materials: hydroxylated chlorotrifluoropropene, modified hexamethylene diisocyanate tripolymer, phthalic anhydride polyester polyol, nano silicon carbide whiskers and polyimide microspheres. A fluorine element is introduced into hydroxylated chlorotrifluoropropene, so that the thermal decomposition temperature of the material is remarkably increased, and thermal movement and oxidative degradation of a molecular chain at high temperature are inhibited; meanwhile, a rigid benzene ring structure of bisphenol A dihydroxyethyl ether improves the regularity of a molecular chain and reduces high-temperature softening deformation. The modified hexamethylene diisocyanate tripolymer forms a stable siloxane cross-linked network, so that the thermal stability of the material is further enhanced; in addition, an isocyanate group reacts with hydroxyl to generate a high-density carbamate crosslinking point, so that the regularity of a hard segment is enhanced, and the thermal stability of the material is improved.

The invention provides an optical monomer as well as a preparation method and application thereof, the structural general formula of the optical monomer is shown in the specification, in the formula, R1 and R2 are groups with the structural formula shown in the specification; or, one of R1 and R2 is hydrogen, and the other one of R1 and R2 is a group shown in the structural formula; r0 in the group represents hydrogen or methyl. The optical monomer provided by the invention has a (methyl) acrylate group and has the properties of high refractive index and low volume shrinkage; the monomer contains a plurality of aromatic rings with high molar refractive index and low molar volume, sulfur atoms with higher molar refractive index and dibenzothiophene groups with both aromatic rings and sulfur, so that the whole molecule of the monomer has extremely high refractive index, and the whole optical monomer is small in molecular weight and convenient to migrate.

A molecular-spin qubit includes a molecular color center having a ground state and an excited state. The ground state has non-zero spin with at least first and second sublevels. The molecular-spin qubit also includes a host matrix that is non-isostructural with the molecular color center. The molecular color center is diluted in the host matrix. An optical transition between the ground and excited states lies in the optical region of the electromagnetic spectrum. A spin transition between the first and second sublevels lies in the microwave or millimeter-wave regions of the electromagnetic spectrum. Each of the first and second sublevels is first-order insensitive to magnetic fields near zero magnetic. The molecular color center and host matrix may each be formed from strong-field ligands bound to a metal-atom center. One example of the molecular-spin qubit is Cr(IV)(o-toyl)4 diluted in a host matrix of Sn(IV)(4-fluoro-2-methylphenyl)4.

The invention discloses an organic tertiary amine / polyether double-modified organic silicon surfactant which is characterized in that the structural formula of the organic tertiary amine / polyether double-modified organic silicon surfactant is # imgabs0 #, the value of m is 0-80, the total value of a and b is 2-40, a is greater than or equal to 1, and b is greater than or equal to 1; x is 6-30, and y is 0-30; r1 is alkyl with the carbon atom number of 1-10 or alkyl alcohol with the carbon atom number of 1-10, and R2 is hydroxyl, methyl, acetyl, amino, butyl, carboxyl or carboxylate radical ions. The modified organic silicon surfactant provided by the invention has the characteristic of variable surface tension under different conditions; the silicone oil has high surface tension at the initial stage of the composite material, so that the fluidity can be improved; along with the increase of the reaction temperature, the tertiary amine group is gradually unblocked, the surface tension of the silicone oil is gradually reduced, and the later emulsifying property of the composite material is improved.

The invention provides an Au nanocluster-Cu monatomic / titanium dioxide photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalysis. According to the invention, the Cu monatomic atom is used as a catalyst for hydrogen evolution reaction, the Cu monatomic atom and the Au nano-cluster are loaded at the same time, the Cu monatomic atom can be used as an electron transport bridge to regulate the electronic structure of the Au nano-cluster, the synergistic effect of the Cu monatomic atom and the Au nano-cluster is realized, the catalytic activity is regulated and controlled together, and efficient series connection of multi-step reaction is realized; therefore, the product selectivity can be accurately regulated and controlled; the catalytic oxidation reaction can be dynamically adjusted through carrier mediation or direct contact by virtue of the electron interaction between the Cu monatomic and the Au nano-cluster, so that the electron distribution in the catalytic process is favorably optimized, the reaction energy barrier of C-C bond breakage and hydroxymethyl oxidation is regulated and controlled, and the dynamic performance of generating GA and hydrogen through photocatalytic oxidation of EG is improved.

The invention relates to the field of macromolecular surfactants, and discloses an agricultural macromolecular surfactant and a preparation method thereof. The preparation method comprises the following steps: introducing a plurality of hydrophilic polyethylene glycol side chains into sodium lignin sulfonate molecules by adopting an electrophilic substitution reaction to prepare novel anionic sodium lignin sulfonate polyoxyethylene ether, introducing a tetramethyl piperidylamine monomer by virtue of a Mannich reaction to synthesize novel hindered amine grafted sodium lignin sulfonate polyoxyethylene ether, the stable agricultural polymer surfactant is prepared by mixing a cationic surfactant hexadecyl trimethyl ammonium bromide and the cationic surfactant hexadecyl trimethyl ammonium bromide, and the agricultural polymer surfactant has strong surface activity, dispersing performance and photolysis resistance.

The invention belongs to the technical field of toluene hydrogenation catalysts, and particularly relates to a magnetically separable carbon-supported ruthenium cluster catalyst as well as a preparation method and application thereof. According to the catalyst, a nickel-coated graphene core-shell structure carbon material is used as a carrier, and ruthenium is loaded on a graphene shell layer in a cluster form through a deposition and precipitation method. The catalyst can efficiently catalyze toluene hydrogenation to generate methylcyclohexane under the mild condition of 80-110 DEG C and the hydrogen pressure of 10-30 bar. Compared with a traditional catalyst, the magnetic separable catalyst not only can work under a relatively mild condition, but also can be separated, recycled and reused by externally applying a magnetic field, so that the targets of environmental protection, energy conservation and emission reduction are further achieved.

The present invention provides a composition for forming a gel polymer electrolyte which includes a lithium salt; an organic solvent; and a crosslinking compound represented by Formula 1. wherein in Formula 1, L1, L2, L3, and L4 are each independently selected from a direct bond or an alkylene group having 1 to 3 carbon atoms, L5 and L6 are each independently an alkylene group having 1 to 20 carbon atoms in which at least one methylene group is optionally substituted with an ether group and at least one hydrogen is substituted with fluorine, and R1 and R2 are each independently selected from hydrogen, an alkyl group having 1 to 3 carbon atoms, or a halogen.

The invention belongs to the field of membrane materials, and particularly relates to a polyether-based block copolymer and a preparation method and carbon capture application thereof. According to the invention, dichloromethane is taken as a solvent, trifluoromethanesulfonic acid is taken as an initiator, and in the presence of a chain transfer agent ethylene glycol, 1, 3-dioxolane is subjected to cationic ring-opening polymerization to generate PDXL (HO-PDXL-OH) of which two terminal groups are hydroxyl groups. Further, N, N-dimethylformamide is used as a solvent, dibutyltin dilaurate is used as a catalyst, and HO-PDXL-OH and diphenylmethane diisocyanate are subjected to polycondensation to synthesize block copolymer polyurethane (PU). The polyether-based segmented copolymer prepared by the preparation method disclosed by the invention is used as a gas separation membrane material and has relatively high CO2 capture performance, and the CO2 separation performance of the polyether-based segmented copolymer is superior to that of other polyether-based membrane materials and is close to the Robeson upper limit.

A photoelectric composite cable for an underwater buoy, and a preparation process therefor. A polyurethane, a self-repairing polyurethane prepolymer, and a composite nano zinc oxide are selected as an outer sheath base material. A modified polysiloxane having a B-O six-membered ring dynamic cross-linked network and a long-chain alkane group and an amino is introduced into the self-repairing polyurethane prepolymer; 5,5'-methylenedisalicylaldehyde and isophorone diisocyanate are together subjected to stepwise polymerization with the modified polysiloxane, and the 5,5'-methylenedisalicylaldehyde is cross-linked with diphenylmethane diisocyanate to obtain a self-repairing polyurethane prepolymer; and nano zinc oxide is subjected to a modification treatment, wherein dodecyltrimethoxysilane and 3-glycidoxypropyltrimethoxysilane are used for dual modification, such that super-hydrophobic nano zinc oxide having good thermal stability and high dispersity is prepared in a toluene system.

This polarizing film containing a base material is characterized in that the base material includes an azo compound represented by formula (1) or a salt thereof (compound A), and an azo compound represented by formula (2) or a salt thereof (compound B). (In formula (1), X1 represents an amino group which may have a substituent, a phenylamino group which may have a substituent, a naphthylamino group which may have a substituent, a benzoylamino group which may have a substituent, or a naphthotriazole group which may have a substituent, Q1 and R1 to R4 each independently represent an optional substituent, and m represents an integer of 1 to 3.) (In formula (2), X2 represents an amino group which may have a substituent, a phenylamino group which may have a substituent, a naphthylamino group which may have a substituent, a benzoylamino group which may have a substituent, or a naphthotriazole group which may have a substituent, Q2 and R5 to R8 each independently represent an optional substituent, R9 represents a hydrogen atom or a methyl group, and n represents an integer of 1 to 3.)

The invention relates to an optical monomer and a preparation method and application thereof, the structural general formula of the optical monomer is shown as G1, G2, G3, G4, G5 and G6, R1 represents hydrogen, phenyl, halogen and C1-C4 alkyl, and A1 represents C1-C4 alkyl or phenyl; r2 represents hydrogen or methyl; n is a positive integer selected from 1-10. The optical monomer provided by the invention contains a plurality of aromatic rings with high molar refractive index and low molar volume, and also contains sulfur atoms with relatively high molar refractive index, so that the whole molecule of the whole monomer is extremely high in refractive index. The monomer structure provided by the invention has a plurality of branched chains, the overall molecular weight is small, and the molecules are not easy to agglomerate.

Provided is a water repellent composition containing a polymer (A), a polyether-modified polydimethylsiloxane (B), and an aqueous medium (C). The polymer (A) contains a repeating unit derived from a monomer (a1) represented by the formula CH2=C(-R11)-C(=O)-R12 (in the formula, R11 is a hydrogen atom or a methyl group and R12 is a C9-40 hydrocarbon group.).

The invention discloses hydrolysis-resistant liquid phosphite ester and a preparation method and application thereof.The hydrolysis-resistant liquid phosphite ester is prepared by the steps that 2, 2, 4-trimethyl-1, 3-pentanediol and phosphorus trichloride or phosphite triester serve as raw materials, a cyclization reaction is conducted firstly, and then the hydrolysis-resistant liquid phosphite ester is obtained; and then carrying out nucleophilic substitution on Cl or aryl and alkyl on the cyclized intermediate by using higher saturated monohydric alcohol with more than C8, wherein the molecular structure is as shown in formula I in the specification. The liquid phosphite ester is novel liquid phosphite ester, the main body of the liquid phosphite ester is of a six-membered ring structure, the basic structure of the phosphite ester is reserved to the maximum extent, and the anti-oxidation effect of the phosphite ester is guaranteed; hydrophobic aliphatic chain structures on phosphorus atoms and branched chains of the phosphorus atoms prevent water molecules from approaching P-O bonds, so that the phosphorus atoms and the branched chains are prevented from being attacked by the water molecules, and the hydrolysis resistance is improved under the conditions that any additional amine hydrolysis-resistant agent is not used and any steric hindrance group is not introduced; good practical value, economic value and market prospect are realized.