4606 results about "Unsaturated polyester" patented technology

A process for the preparation of an unsaturated polyester which comprises (i) reacting an organic diol with a cyclic akylene carbonate in the presence of a first catalyst to thereby form a polyalkoxy diol, and (ii) optionally adding thereto a further amount of cyclic alkylene carbonate in the presence of a second catalyst, and (iii) subsequently polycondensing the resulting mixture with a dicarboxylic acid.

The invention discloses an emulsion type carbon fiber sizing agent, which comprises main size, an emulsifier, an aid and deionized water. The aid comprises a diluent and a penetrant, wherein the emulsifier is 5 to 15 mass percent of the main size, the diluent is 0 to 120 mass percent of the main size, the penetrant is 1 to 5 mass percent of the main size, and the mass ratio of the deionized water to the main size is 50-90:10-50. The invention also discloses a preparation method and application of the sizing agent. The sizing agent is suitable for unsaturated polyester resin and solves the problem of poor adhesion of the unsaturated polyester resin and the carbon fiber. After the sizing agent is used for sizing, the wear resistance of the carbon fiber is improved, and the broken filament amount is reduced, the post-processing performance of the fiber is improved, the interface adhesion of the carbon fiber and matrix resin is better, the shear strength between layers is improved, and the performance of composite materials is also improved.

Novel latex or emulsion compositions containing internally plasticizing and crosslinkable monomers derived from traditional semi-drying or non-drying oils are disclosed and claimed. The monomers are ethylenically unsaturated derivatives of long-chain olefinic compounds. Preferred embodiments include latex formed from acrylate or methacrylate esters of fatty alcohols. A process for the synthesis of the latex composition is also disclosed, which involves (a) polymerization of the ethylenically unsaturated derivatives of a long-chain olefinic compound in an aqueous phase with at least one other copolymerizable monomer; and (b) blending of so formed polymer with at least one drier and a surfactant to form the novel latex or emulsion compositions. These compositions form films at low minimum film forming temperatures (MFT) ranging from -5 to 10° C. and cure to above ambient glass transition (Tg) polymers without the use of traditional organic cosolvents which contribute to environmental pollution via volatile organic compounds (VOCs) emissions. These compositions are therefore useful in waterborne coatings, contact and pressure sensitive adhesives, and inks.

The invention relates to apparatus for generating ions in a gaseous medium, the apparatus comprising one or more needles (40) each presenting a shank (40.1) and an emitter end (40.2), a sheath (42) of composite material comprising glass fiber reinforced unsaturated polyester surrounding the shank (40.1) of each needle, and means (44, 46, 80) for applying a voltage between two portions of the shank of each needle.

The invention discloses a raw material of an artificial quartzite plate and a method for preparing artificial quartzite by using the same. The raw material of the artificial quartzite plate comprises a substrate material and additives, wherein the substrate material comprises 20-70 wt% of quartz sand, 20-70 wt% of quartz powder, 8-12 wt% of unsaturated polyester resin, and 0.3-0.7 wt% of color paste; the additives comprise a composite curing agent and a coupling agent, the weight of the composite curing agent is 0.8-2.0 % of the weight of the unsaturated polyester resin, and the weight of the coupling agent is 0.5-1.5 % of the weight of the unsaturated polyester resin; the composite curing agent is prepared by mixing a middle-temperature curing agent and a high-emperature curing agent, and the weight ratio of the middle-temperature curing agent to the high-temperature curing agent is 1/9-3/7. Practices show that by using the raw material to prepare artificial quartzite, the cost is low, the efficiency is high, and the comprehensive properties of the product are excellent.

The invention discloses an environmentally-friendly type solvent-free impregnating resin and a preparation method thereof. The impregnating resin comprises: 100 parts by weight of one or more high heat-resistant unsaturated polyester resins, 0 to 100 parts by weight of one or more modified epoxy resins, 50 to 200 parts by weight of one or more novel reactive diluents, 0.1 to 1 parts by weight of one or more polymerization inhibitors, 1.5 to 3.8 parts by weight of one or more initiators and 0 to 2 parts by weight of one or more auxiliary agents. Under the same work conditions, a baking time of the solvent-free impregnating resin is less than about one third of a baking time of the existing conventional solvent-free type impregnating resin utilized for middle and low voltage motors and transformers, and an energy consumption of the solvent-free impregnating resin is lower than about 25% of an energy consumption of the existing conventional solvent-free type impregnating resin middle and low voltage motors and transformers.

An absorbent binder coating including monoethylenically unsaturated polymer units, polyacrylate ester units that include an alkoxysilane functionality, and polyolefin glycol units and/or polyolefin oxide units, can be applied to various substrates. For example, the coating can be self-applied to an article of clothing or to a person's skin to provide absorbency. Alternatively, the coating can provide moisture absorbency, as well as adhesive properties, when incorporated into various articles including medical devices, wound dressings, laminates, absorbent garments, packaging materials, and horticultural products.

The invention relates to the field of composite materials, in particular to a continuously-directional glass fiber reinforcement unsaturated polyester sheet molding compound. The continuously-directional glass fiber reinforcement unsaturated polyester sheet molding compound comprises the following components in part by weight: 15 to 50 parts of unsaturated polyester resin, 5 to 12 parts of low astringent, 8 to 20 parts of chopped glass fibers of 12 to 26 millimeters, 1.5 to 8 parts of directional continuous glass fibers, 10 to 50 parts of calcium carbonate, 10 to 50 parts of aluminum hydroxide, 0.2 to 1 part of organic peroxide, 1 to 4 parts of styrene, 0.2 to 1 part of thickening agent, and 1 to 3 parts of mold discharging agent. The continuously-directional glass fiber reinforcement unsaturated polyester sheet molding compound has the advantages of reasonable formula design, good flame retardance, high strength, low manufacturing cost and stable quality.

The invention relates to a preparation method and application of unsaturated polyether. The preparation method comprises the following steps: (1) adding unsaturated alcohol and a catalyst into a first reactor, replacing with nitrogen, continuously adding epoxide with short branches and reacting to obtain an intermediate product A, wherein the unsaturated alcohol is one or a mixture of more than two of methyl allyl alcohol and isoamyl alcohol at any proportion and the mass ratio of the unsaturated alcohol to epoxide is 1.0:(0.1-5.0); and (2) putting the intermediate product A obtained in the step (1) and the catalyst into a second reactor, replacing with nitrogen, continuously introducing ethylene oxide and reacting to obtain polyether B, and neutralizing the pH value of the polyether B product to be 5-7 with a neutralizing reagent, wherein the mass ratio of the intermediate product A to ethylene oxide is 1.0:(15.0-51.0). The invention also provides the unsaturated polyether prepared by the preparation method, which is disclosed by the invention and application of unsaturated polyether in synthesis of polycarboxylic water reducer and the water reducer prepared from the unsaturated polyether synthesized by the method has the advantages of low doping amount, high water reduction rate, good slump-retaining agent and like.

The invention discloses a graphene oxide/unsaturated polyester composite material and a preparation method of the composite material. The composite material comprises the raw materials: dihydric alcohol, graphene oxide, saturated binary acid or acid anhydride, unsaturated binary acid or acid anhydride, vinyl monomer, and normal polymerization inhibitor, initiator and accelerant, wherein the content of the graphene oxide is 0.06-0.5wt%. The preparation method of the graphene oxide/unsaturated polyester composite material comprises the following steps of: adding the graphene oxide into the dihydric alcohol to directly and ultrasonically disperse, or adding the dihydric alcohol into graphene oxide water solution to ultrasonically disperse and remove water in a fractional distillation way so as to obtain graphene oxide/dihydric alcohol solution which is evenly dispersed; performing polycondensation between the obtained graphene oxide/dihydric alcohol solution and the saturated binary acidor acid anhydride, unsaturated binary acid or acid anhydride and polymerization inhibitor with metering ratio, and diluting by adding the vinyl monomer after the polymerization so as to prepare graphene oxide/unsaturated polyester resin; and adding the initiator and the accelerant, and curing and crosslinking to prepare the graphene oxide/unsaturated polyester composite material.

The invention relates to a preparation method of a viscosity-reducing type polycarboxylate superplasticizer. The preparation method comprises the following specific steps: firstly stirring acid anhydride small monomers containing unsaturated double bonds and binary primary amine type organic small molecules at a certain temperature to generate unsaturated primary amine type small monomers; then adding organic small molecules containing epoxy groups and the organic small molecules containing halogen groups into a generated reaction system of the unsaturated primary amine type small monomers and continuously stirring for 5-72h to obtain products, namely quaternary ammonium salt type unsaturated small monomers; and further performing water-phase free radical polymerization reaction on the quaternary ammonium salt type unsaturated small monomers, unsaturated ester type small monomers, unsaturated acid type small monomers and unsaturated polyester large monomers under the action of an initiator and a chain transfer agent, adjusting the pH value after the reaction and adding water to obtain the viscosity-reducing type polycarboxylate superplasticizer. The viscosity-reducing type polycarboxylate superplasticizer prepared by the method provided by the invention has the advantages of simple reaction, easiness in control, low cost and the like. Furthermore, the viscosity of concrete can be reduced, the slump retention can be improved.

An invention is provided wherein the bearings of a molded motor do not become electro-eroded. An inner rotor type, brushless DC motor 10 is provided having a stator 22 which has a stator core 12 wound with a coil 16, a housing 26 formed by covering the outside surfaces of the motor 10 with an unsaturated polyester, molding resin having electrical insulating properties, and an earth electrode 40 made of metal, installed to go through a metal bracket 38 and the housing 26 to reach the stator core 12, such that electric current flows from the stator core 12 and the bracket 38 to the exterior, preventing electro-erosion and resulting deterioration of bearings 30, 32.

The present invention relates to a novel method of using industrial dicyclopentadiene of purity of 75 percent to 85 percent to prepare modified unsaturated polyester resin. In the preparation of the resin, the industrial dicyclopentadiene separated from the saturated or unsaturated dicarbonic acid or acidic anhydride and the distilled part of mixed C5 is used as the raw material. After hydrolysis and addition reaction, the diol or polyol of appropriate amount is added. The polymerization and dehydration reaction is done with the influence of acidic catalyst. When the mixture is condensed to the designated acid value, the inhibitor and cross-linking monomer of appropriate amount are added and then stirred to prepare the product. The present invention has the advantage that the cost of resin is lower than the common type unsaturated resin. At the same time, the air-drying performance, heat resistance, volumetric shrinkage rate and other performances are all superior to the common type unsaturated polyester resin. The product can be widely used in the fields of glass steel, mold, plastic clothing, sealing, and adhesive and so on.

The invention relates to a method for synthesizing unsaturated phenolic resin with various etherification waste, which includes the four steps: (1) etherification waste and polyhydric alcohol have alcohol sis and ester interchange with catalyst existing; (2)alcohol zed product and unsaturated binary acid or have etherification polycondensation; (3) use dicyclopentadiene (DCPD) to blocking modify in the later period of etherification polycondensation; (4) add into styrene solution for cross linking. The invention has plentiful sources of raw material, low price, decreased pollution and productive cost and energy saving, as well as eliminates the disadvantage of bad dissolubility in styrene .

The invention discloses a high-strength man-made quartz plate and a preparation method thereof. The plate comprises the following raw materials: unsaturated polyester resin, an inorganic material, a pigment, a coupling agent, a strength increasing material, a promoter and a curing agent. The preparation method includes: weighing all the raw materials according to a weight ratio, mixing uniformly, filling a mould with the material mixture, vibrating under vacuum, degassing by vacuum pressing, curing and forming at a medium temperature, and performing surface sanding processing to obtain a finished product. Beneficial effects of the man-made quartz plate and the preparation method thereof are that: the man-made quartz plate has increased plate density, increased rupture strength, increased compressive strength, increased falling-ball impact strength, reduced water adsorption rate, improved comprehensive performance indexes, and prolonged service lifetime; the application fields of finished products of the man-made quartz plate are largely increased; and the strength increasing material is added, thus largely increasing the strength of the man-made quartz plate.

The invention relates to a preparation method of hydroxy fluorine-containing water-based acrylic ester-polyurethane. The preparation process is as follows: (1) carrying out condensation polymerization on dihydric alcohol containing double bonds and binary acid at different proportions to synthesize unsaturated hydroxyl-terminated polyester; (2) taking unsaturated polyester as the talleta of polyurethane, adding a certain amount of dihydric alcohol chain extender so as to enable hydrophilic monomer, catalyst and diisocyanate to react, neutralizing and adding water for chain extension to prepare water-based polyurethane containing unsaturated double bonds; and (3) taking the macro-monomer of the water-based polyurethane as a surfactant, and utilizing acrylic ester- ethylene monomers, fluorine-containing acrylic ester monomers and hydroxyl acrylic ester monomers to synthesize the hydroxy fluorine-containing water-based acrylic resin-polyurethane hybrid by a nonsoap emulsion polymerization method. The invention can regulate the structure and performances of resin by regulating the use amount of fluorine monomers and hydroxyl monomers. The invention introduces hydroxyl into a water-based fluorine-containing acrylic ester polyurethane macromolecule chain so as to prepare room temperature-dried or baking-type thermoset water-based paint together with water-based polyisocyanates and water-based amino plastic, thus greatly improving the performance of the water-based paint; and the prepared paint can be used in various basal materials such as wooden wares, metal, plastics, concretes and the like.

The invention relates to a method for preparing solventless unsaturated polyester-imide wire coating enamel. The method comprises preparation of unsaturated polyester-imide and processing of paint mixing, wherein the unsaturated polyester-imide is prepared by the following steps: first step, adding polylol, dibasic acid or estolide into a reaction kettle according to a mol ratio of 1.05-1.5:1; stirring and heating the mixture to a temperature of between 160 and 170 DEG C; preserving the heat for 0.5 to 2 hours; and slowly heating the mixture to a temperature of between 200 and 205 DEG C until the acid value is no less than 50 mg KOH/g; and second step, cooling the mixture to a temperature of between 110 and 120 DEG C, adding trimellitic anhydride and diamine with the mol ratio of 2:1, and preserving the heat at a temperature of between 130 and 150 DEG C until the material is transparent; and after 1 hour of heat preservation, slowly heating the material to a temperature of between 200 and 205 DEG C until the acid value is no less than 30 mg KOG/g. Machine winding dipped by the solventless resin has the advantages of small volatilization loss, high filling rate, few times of paint dipping, short baking time, strong binding power, excellent performance of electrical appliance, environmental pollution reduction, and the like.

The invention relates to a process for synthesizing unsaturated polyester resin with renewable vegetable fat, which comprises generating acid ester through conducting alcoholysis reaction for vegetable oil and organic polyatomic alcohol, using as modified dihydric alcohol and being leading to the typical synthesis formulation of unsaturated polyester resin, completely replacing conventional dihydric alcohol, using for synthesizing unsaturated polyester, and then mixing with cross-linking monomer. The resin which is synthesized has excellent hue, appropriate viscosity, excellent heat stability, favorable alkali resistivity, wonderful flexible property and low shrinking rate, which is suitable for various composite material shaping technology such as hand lay-up, winding and spraying and the like. Renewable raw material of vegetable oil with cheap price is applied in the synthesis process of the invention, and the stability of product is excellent.

The present invention relates to a molding material comprising an unsaturated polyester resin and microfibrillated plant fibers, the microfibrillated plant fibers comprising cellulose and hemicellulose, and having a specific surface area of 5 to 20 m²/g; a method of producing the molding material; a molded article obtained by curing the molding material; and a method of producing an unsaturated polyester resin molded article comprising microfibrillated plant fibers.

The invention discloses a fiberglass radome modified by glass beads, which reduces the DK value thereof, and improves the wave penetration performance of the products. The fiberglass radome modified by glass beads is prepared by the following raw materials in weight portion: 100 portions of unsaturated polyester, 2-10 portions of glass beads, 0.5-2 portions of mold release agent, 0.5-2 portions of curing agent and 0.5-2 portions of accelerator.

A polyester prepared by free radical polymerization of an unsaturated polyester prepolymer, wherein the polymerization occurs primarily by reaction of the unsaturation is disclosed. Coatings comprising the same are also disclosed, as are substrates coated at least in part with such coatings.