90 results about "SA copolymer" patented technology

The invention provides a method of producing organomodified siloxanes with domain-type distribution obtained by partial or complete reaction of

A) hydrogensiloxanes with a degree of distribution (persistency ratio) (η) of components [A] and [B] in the copolymer [AB]$\eta =\frac{\left[A\right]\left[B\right]}{\left[\mathrm{AB}\right]}$

of η>1, preferably >1.1, in particular ≧1.2, with B) olefinically and/or acetylenically unsaturated compounds, the compounds resulting therefrom and their use.

A partial block polyimide-polysiloxane copolymer is provided comprising repeat unit structures having structural formulae (1) and (2) wherein X is an aromatic or aliphatic ring-containing tetravalent organic radical, Y₁ is a diamine residue, Y₂ is a diaminosiloxane residue, Y₁ and Y₂ are contained in the copolymer in amounts of 99-20 mol % and 1-80 mol %, respectively, L and m each are an integer of 2-50. The copolymer has good adhesion to substrates, moisture-proof reliability and a low modulus of elasticity.

The invention relates to a polyether early- strength super-plasticizing agent. The preparation method comprises following steps: (1) copolymerization of water- borne free radical: 5%- 15% monomer a, 82%- 92% monomer b, 2%- 8% monomer c, and 1%- 3% monomer d copolymerizes in water- borne medium, the total amount of said monomers is 100%; (2) neutralizing reaction: adding alkoxy organic amine e showed in general formula (6) and (7) into copolymer after polymerizing reaction for neutralization, moderating the copolymer pH to be between 6.0- 7.5. The invention is characterized in that: (1) the dispersing performance and strengthening effect are outstanding at very low amount, and the strengthening effect at normal temperature or lower temperature at early stage is excellent, and the effect at middle and later stage grows stably; (2) it can reduce the concrete contract, and the contract rate is less than 90% of that of standard concrete; (3) it barely contains no chloride ion and is helpful for concrete durability increase.

A polymer nano / micro particle additive is prepared from a main monomer and functional monomers by copolymerization. The functional monomers contain carboxylic group, sulfate group, sulfonate group, phosphate group, phosphite group, silane functional group, silicon hydroxyl functional group, and quaternary amine, quaternary phosphonium and tertiary sulfur functional groups; and the polymer nano / micro particle additive is a dry powder, or an aqueous dispersion. Under certain circumstances, the polymer does not contain main monomer but necessarily contains the above functional monomers. By introducing functional groups or anaphase modification, the polymer nano / micro particles have the effects of promoting hydration and nucleation of cement and greatly improving the early hydration rate of cement, so as to achieve improve the early strength of the cement-based materials and improve the toughness of cement-based materials.

The invention discloses an early-strength polycarboxylate superplasticizer having a slump-loss prevention function and a preparation method of the polycarboxylate superplasticizer. The polycarboxylate superplasticizer is prepared through the following steps: (I) copolymerizing 5-12% of a monomer a, 73-89% of a modified low-foam early-strength polyether monomer b with the molecular weight (M) in a range of 2000-5000, and 6-15% of a monomer c in an aqueous solution at 50-70 DEG C to obtain a copolymerization reactant, wherein the total amount of the monomer a, the monomer b, and the monomer c is 100% by weight; and (II) adding a pH value conditioning agent into the copolymer for a neutralization reaction, wherein the pH value of the copolymer is adjusted to 6.8-7.2. According to the invention, the early-strength polycarboxylate superplasticizer having a slump-loss prevention function enables the fluidity of cement paste of concrete to be well kept. The concrete is low in air content and short in setting time, and the early-strength of the concrete is significantly enhanced. The polycarboxylate superplasticizer enables the concrete to have certain slump maintenance, and is particularly suitable for production of a prefabricated component of a pile tube or duct piece.

Matrix controlled diffusion drug delivery systems comprising a therapeutically effective amount of one or more pharmaceutically active agents entrapped in a copolymer which is a reaction product of a monomeric mixture comprising one or more acrylate ester and/or methacrylate ester-containing monomers and one or more acrylamido-containing monomers are disclosed. Also disclosed are processes for their preparations and methods for their use.

A resin composition to be used as a material for a various part of an automotive vehicle. The resin composition comprises a copolymer (A) formed by copolymerization of a first unsaturated monomer (a) and a second mononer (b). The first unsaturated monomer has a functional group which is bondable by hydrogen bond to a hydroxyl group. The second monomer is copolymerizable with the first unsaturated monomer. A metal oxide (B) is dispersed in the copolymer and having hydroxyl groups and hydrophobic groups at surface of the metal oxide.

The invention relates to an alkyd resin modified polymer electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps that alkyd resin andone or more monomers of acrylamide, methacrylamide, acrylonitrile, methyl acrylate, methyl methacrylate and monofunctional or polyfunctional polyethylene glycol acrylate/polyethylene glycol methacrylate are subjected to copolymerization in an organic solvent under the action of an initiator, then an electrolyte body, a plasticizer and ionic non-conductive or ionic conductive inorganic nano-particles or nano-fibers are added into a copolymer, and uniform mixing is carried out so as to obtain the alkyd resin modified polymer electrolyte; or the alkyd resin and an ionic conductive polymer are dissolved in the organic solvent, the electrolyte body, the plasticizer and the ionic non-conductive or ionic conductive inorganic nano-particles or the nano-fibers are added to perform blending, and uniform mixing is carried out so as to obtain the alkyd resin modified polymer electrolyte. The invention provides the novel high-performance polymer electrolyte and the preparation method thereof.

The present invention discloses a film-builder used for seed-coating agent, which is a copolymer produced by initiation and co-polymerization of AMPS monomer and at least one vinyl monomer. In the co-polymer, mole percentage of AMPS monomer is from 0.5% to 30%, and the balance is vinyl monomer, wherein the vinyl monomer is chosen from acrylic ester or metacrylic acid ester or vinyl acetate or phenyl ethylene or acrylic amide. The film-builder has good film building and sustained-release function, high film building strength, water adsorb and resistance, and chemical stability, and favorable biocompatibility with agronomic crop. The shedding rate of seed lagging cover after drying low, film after absorbing water and expansion ventilated and not dissolvable, active ingredient can be released slowly, and favorable growing microenvironment for plant especially crops can be produced.

The invention relates to a high-flexibility quaternary copolymerization fluorine-containing resin as well as a preparation method and an application thereof, belonging to the technical field of solar photovoltaic cell materials. The high-flexibility quaternary copolymerization fluorine-containing resin used for the packaging film of a solar cell is characterized by being copolymerized by the following monomers in the molar percentage by weight in a copolymer: 30-45% of ethylene, 40-60% of tetrafluoroethylene, 1-10% of perfluoroalkylation vinyl ether and 1-10% of 2-(perfluor propyl group) perfluor propyl group trifluoroethylene ether. A film prepared from the high-flexibility quaternary copolymerization fluorine-contained resin has the advantages of good flexibility and transparency, good weather fastness, good self-cleaning capability, high mechanical strength and excellent bonding property, and can serve as a packaging film to replace packaging glass in the solar cell assembly, thereby solving the problems that glass is easily broken and polluted, is difficult to maintain and transport, have small possibility of bonding and the like, and widening the application field of the solar cells.

The invention relates to a dication polyacrylamide flocculating agent and preparation method thereof. More than two-thirds of structural units of flocculating agent copolymer are cationization acrylamide, and methyl carbonate quaternary amine ions are introduced into the copolymer. The flocculating agent of the invention has higher hydrophobic nature, favorable flocculation effect, acid resistance, alkali resistance and wide range of suitable pH value, and can be used for treating high concentration dyeing and desizing wastewater; and besides, the inventory rating of the flocculating agent is low, and therefore the use cost can be reduced. The preparation method of the invention simultaneously utilizes the two active groups, namely side-chain amido of acrylamide to generate methyl carbonate quaternary ammoniated cationic acrylamide monomer by Menez reaction, a main chain and trimethyl acyloxy ethide trimethyl ammonium chloride cationic monomer are copolymerized, and the method of environmentally friendly one pot boiling is adopted; and the operation is simple, the cost is low, and the obtained flocculating agent has favorable stability and flocculation effect.

A positive-working resist composition of a wide level of DOF and a method for resist pattern formation are provided. This composition is a positive-working resist composition comprising a resin component (A) which, upon action by an acid, increases alkali solubility and an acid generating agent component (B) which produces an acid upon exposure. The component (A) is a copolymer comprising n (n=an integer of 4 to 6) types of constitutional units different from each other in structure, and the proportion of each constitutional unit in the copolymer is more than 0% by mole and not more than 100/(n−1)% by mole.

The invention discloses environment-friendly acrylate emulsion adhesive with network interpenetrating structures and a method for synthesizing the environment-friendly acrylate emulsion adhesive. The environment-friendly acrylate emulsion adhesive comprises modified polyvinyl alcohol, mixed monomers, composite emulsifiers and initiators. The modified polyvinyl alcohol is a component I, and the mixed monomers are components II. The environment-friendly acrylate emulsion adhesive and the method have the advantages that polyvinyl alcohol macromolecular chains are led into copolymers, and accordingly the water resistance of the environment-friendly acrylate emulsion adhesive can be effectively improved; movement of acrylate polymer molecules can be inhibited by the aid of the network interpenetrating structures formed by polyvinyl alcohol macromolecules, and accordingly the purpose of improving the hardness and the adhesive strength of polymers can be achieved; raw materials for the environment-friendly acrylate emulsion adhesive are non-toxic and pollution-free, accordingly, the environment-friendly acrylate emulsion adhesive and the method conform to current green chemistry development trend, and the environment-friendly acrylate emulsion adhesive is applicable to industrial production.

The invention discloses a method for preparing a copolymer/HKUST-1 hybrid material by in-situ polymerization and belongs to the technical field of skeleton materials. Specifically, the invention relates to a classical porous metal-organic skeleton material prepared from trimesic acid as an organic ligand, a copper methacrylate monomer for providing metal ions and a styrene monomer through polymerization and coordination chemistry self-assembling at the normal temperature. The method improves the stability of HKUST-1. The copolymer/HKUST-1 hybrid material combines functions of a polymer and anorganic skeleton material and has wide application values. The produced HKUST-1 and the polymer are bonded through a covalent bond so that the agglomeration of a large amount of MOF particles is avoided and the MOF is uniformly dispersed in the copolymer. The hybrid material realizes the integration of functions of the metal-organic skeleton HKUST-1 and the polymer.

To provide a therapeutic method using a water soluble, high molecular weight block polymer to enable that an intraperitoneally administered anti-cancer agent may maintain for a long-term retention in the abdominal cavity to enoughly exert the effect of the anti-cancer agent and reduce adverse side-effects thereof.

A therapeutic agent as a micelle preparation, comprising a copolymer having a hydrophilic polymeric moiety and a polycarboxylic acid derivative moiety; and an anti-cancer agent bonding to or encapsulated in the copolymer, wherein the micelle preparation may exhibit sustained drug release capability, and enables an extension of a retention time period of the anti-cancer agent in an abdominal cavity, is provided. A superior life-prolonging effect was found in an intraperitoneal administration mouse model compared with a case in which only an encapsulated drug is administered, and thus the present invention was completed accordingly.