179results about How to "Low volatile content" patented technology

The invention discloses a preparation method of organopolysiloxane resin. The preparation method includes the steps of (1), taking alkoxyorganosilane, an end-capping reagent and an acidic compound as preparation raw materials; (2), feeding the preparation raw materials with uniform stirring, wherein the feeding molar ratio of the end-capping reagent to the alkoxyorganosilane to the acidic compound is (0-40):1:(0.2-5); (3), adjusting the temperature at 40-150 DEG C at which condensation polymerization reaction is conducted for 2-20 hours; (4), terminating the condensation polymerization reaction, adjusting a reaction mixture to be neutral, and purifying a reaction product so as to obtain the organopolysiloxane resin. The preparation method of the organopolysiloxane resin has the advantages of environmental protection and no pollution during production, low energy consumption, short period, high product yield and the like and is more excellent in performance.

The present invention relates to a process for producing polypropylene terpolymer composition by polymerizing propylene with ethylene and C4 to C8 α-olefin monomers in a sequential polymerization process with at least two reactors connected in series in the presence of solid Ziegler-Natta catalyst having a surface area below 20 m²/g.

The invention discloses an epoxy matrix resin, a prepreg, a preparation method of the prepreg and a device for preparation of the prepreg, in order to solve the problem of poor performance of an epoxy matrix resin curing substance caused by uneven toughening phase state even no phase separation in the traditional epoxy matrix resin curing product, the problem of complex technique of the traditional preparation method of the prepreg and relatively imprecise control on the resin content in the prepreg, and the problem of high manufacturing cost of the traditional device for preparing the prepreg. The epoxy matrix resin is prepared from a phenolic epoxy resin, a bisphenol A epoxy resin, a core shell polymer, a curing agent and a curing accelerator; the prepreg is prepared from the epoxy matrix resin and fiber woven cloth; and the prepreg is prepared through the device for producing the prepreg by a heat fusion method. After and before the resin is cured, the toughening phase state is not changed and is uniformly dispersed; and the toughening phase state effect is good and stable. The mechanical property of the composite material obtained by curing with the prepreg is high.

The invention discloses a single-component, high-solid-content and low-volatility organic compound (VOC) and environment-friendly type varnish composition. The varnish composition comprises at least one polymer with a hyper-branched or tree-shaped structure, at least one hydroxyl acrylic resin or hydroxyl methacrylic resin, at least one cross-linking curing agent, at least one acid catalyst, at least one rheology control agent and at least one auxiliary agent. With the adoption of the varnish composition and application of the varnish composition, disclosed by the invention, the viscosity of a varnish coating system can be effectively reduced, and the solid content of the construction can be easily improved to be 58 percent or above; construction VOC emission is reduced to be smaller than or equal to 420g/L; varnish film shrinkage caused in a curing process can also be effectively reduced and a cured multi-coating varnish film has better appearance effect; particularly, the effect in a wet-on-wet process, a three-coating and one-drying process of curing three coatings together or an IPP system of primers, paints and varnishes is obvious.

The invention discloses a preparation method of a carbon fiber/toughened epoxy resin prepreg for a non-autoclave vacuum bag forming process. According to the method, the dissolution degree and the particle size of a curing agent and a toughening agent in epoxy resin are controlled by controlling a resin formula, the particle sizes of the curing agent and the toughening agent and process conditionsfor resin system configuration, and meanwhile, two modification effects are achieved: 1, the resin system is toughened; and 2, the requirements of a non-autoclave process on the viscosity of the resin in the prepreg and a room-temperature storage period are met. The prepared epoxy resin system is prepared into a rubber film, the carbon fiber/epoxy resin prepreg is further prepared by adopting a rubber film calendering method, and the semi-impregnated prepreg (unsaturated impregnated prepreg) is obtained by controlling the pressure and temperature during compounding of the rubber film and carbon fibers.

The invention relates to a bulk polymerization process for preparing water-soluble styrene/acrylic resins, in which styrene and acryl monomers are polymerized in a solvent mixture of dipropylene glycol methyl ether and water in a temperature-controllable reactor equipped externally with an oil jacket containing a cooling coil therein and the resulting polymers are deprived of volatile contents in a falling-strand type devolatilizer. The water-soluble styrene/acrylic resins take industrial advantages over conventional resins because the resins, if polymerized at lower temperatures, show lower molecular weights, narrower molecular weight distributions, higher acid values and lower volatile content.

The invention discloses a high-heat-resistance high-rigidity environmentally-friendly polystyrene resin composition and a preparation method thereof. The polystyrene resin composition contains the following components in percentage by weight: 59-99 percent of polystyrene resin, 0.5-30 percent of SMA (Styrene-Maleic Anhydride) resin, 0-10 percent of stripping agent master batch and 0.01-1 percent of antioxidant, wherein the stripping agent master batch consists of a matrix and a stripping agent. The preparation method has the advantages of simple production process, reduced production cost and capabilities of effectively improving heat resistance and rigidity of polystyrene resin without reducing mechanical property thereof and meanwhile reducing smell and VOC (Volatile Organic Compound) content of the polystyrene resin; and the prepared polystyrene resin composition can be used in the fields of materials with strict requirements on heat resistance and environmental friendliness in packaging materials, daily articles, household appliances, OA (Office Automation), toys, electronic parts and components and equipment, building materials and automobile materials.

The invention relates to a device and method for pyrolyzing pea coal by utilizing an internally heated vertical furnace. The device comprises an internally heated vertical furnace, wherein a feed hopper, a drying section, a first transition section, a pyrolysis section I, a pyrolysis section II, a second transition section, a cooling section, a discharge valve and a discharge hopper are arranged on the internally heated vertical furnace sequentially from top to bottom, wherein the drying section is communicated with a dry steam circulating fan and a high-temperature steam circulating fan; the dry steam circulating fan is communicated with the cooling section; the pyrolysis section I is communicated with a coal gas heat exchanger and a micro-cyclone dust collector; the micro-cyclone dust collector is communicated with a quencher; the quencher is communicated with a raw gas heat exchanger; the raw gas heat exchanger is communicated with a coal gas heat exchanger and a horizontal water-tube cooler; the horizontal water-tube cooler is communicated with an electrical tar precipitator; the pyrolysis section II is communicated with a combustion furnace and the micro-cyclone dust collector; the combustion furnace is communicated with the coal gas heat exchanger. The device and method are easy to operate, high in heat efficiency, environment-friendly and high in carbocoal quality, and the coal gas can be recycled.

The present invention is directed to a polyester polycarbamate polymeric pigment dispersant to be used as a grind resin to incorporate pigment into pigment dispersions for coating compositions. The pigment dispersant is the reaction product of a first compound having a plurality of hydroxyl groups, a carboxylic acid anhydride, a second compound having at least one epoxy group, and a carbamate compound. The present invention is also directed to a method of preparing the pigment dispersant.

The invention discloses a high-gloss and low-volatility flame retardant polycarbonate composition as well as a preparation method and application thereof. The polycarbonate composition consists of the following components: 100 parts of PC resin, 5-30 parts of acrylonitrile butadiene styrene (ABS) resin, 5-20 parts of a phosphate fire retardant, 0-20 parts of glass fiber, 0.5-2 parts of a high-gloss additive, 0.5-2 parts of fennelflower, 0.3-1 part of an anti-dropping agent and 0.1-2 parts of an additive. The preparation method comprises the steps of mixing the PC resin, the ABS resin, the high-gloss additive, the anti-dropping agent, the fennelflower and the additive in a high-speed mixer for 1-2min to obtain a premix; melting and extruding the premix through a dual-screw extruder; laterally feeding the phosphate fire retardant and the glass fiber, and implementing secondary vacuum pelleting to obtain a finished product. The flame retardant polycarbonate composition disclosed by the invention, through the high-gloss additive, improves gloss thereof, and simultaneously avoids remarkable change in mechanical performance, flowing property and flame retardant performance; the prepared flame retardant polycarbonate composition is high in gloss, good in fluidity, low in volatile content and excellent in mechanical performance, and is applicable to such electronic appliances as television and computer frame as well as products having requirement on high gloss such as automobile.

The invention discloses a preparation method of manufacturing hydroxyl blocking polydimethylsiloxane with low volatile content. Firstly, the hydroxyl blocking polydimethylsiloxane with low viscosity is refined to obtain intermediate products with the content of volatile less than 0.03%. Then, a condensation reaction is done. The water is removed through nitrogen to control the viscosity. Finally, the high viscosity hydroxyl blocking polydimethylsiloxane with the content of volatile less than 0.03% is obtained. The preparation method of manufacturing the hydroxyl blocking polydimethylsiloxane has the advantages that the preparation method and the technology are simple and non-pollution, volatile components of products are small, the quality is stable and good and the like.

The invention relates to a method using the coating technology to prepare solution-method phenolic aldehyde prepreg. The method includes: performing suction filtration pretreatment on a phenolic resin solution to discharge the solvent in the phenolic resin solution; using a coating machine to evenly coat a high-temperature-resistant plastic film with resin after pretreatment, and thermally drying to form a resin film; covering the upper surface and the lower surface of fiber fabric with the resin film through continuous operations, and performing rolling compaction to obtain the phenolic aldehyde prepreg. The method has the advantages that the phenolic aldehyde prepreg prepared by the method is excellent in comprehensive performance, the resin content and the volatile matter content, lower than 1.5%, of the prepared phenolic aldehyde prepreg are easy to control as compared with those of traditional solution-method prepreg, the viscosity and process operability of the prepared phenolic aldehyde prepreg are equivalent to those of prepreg prepared by a hot-melt method, the whole cloth surface is smooth and flat, fit, free of bubbles and the like, and the prepared prepreg is especially applicable to an automatic discharge machine; in addition, the equipment cost of the used coating machine is 1/3-1/2 of that of an impregnator used in the hot-melt method, production energy consumption of the method is greatly lower than that of a solution method, high production efficiency is achieved, and accordingly the production cost of the finished product can be lowered evidently.

The present invention relates to a method for preparation of an ultraviolet (UV)-curable inorganic-organic hybrid resin containing about or less than 4% volatiles and less than 30% organic residues. The UV-curable inorganic-organic hybrid resin obtained according to this method can be UV-cured within a markedly very short time and enables, upon curing, the formation of a transparent shrink- and crack-free glass-like product having high optical quality, high thermal stability and good bonding properties. In view of these properties, this hybrid resin can be used in various applications such as electro-optic, microelectronic, stereolithography and biophotonic applications.

The invention discloses a polyurethane grouting material and a preparation method thereof. The polyurethane grouting material comprises polyhydric alcohols, polyisocyanates, an organic amine catalyst, an organic tin catalyst, a chain extender and a foam stabilizer. The content of the components is as follows: 1 part of polyhydric alcohols and 1 part of polyisocyanates are contained; the content of the organic amine catalyst is 0.3% of the mass of the polyhydric alcohols; the content of the organic tin catalyst is 1.6% of the mass of the polyhydric alcohols; the content of the chain extender is 0.6% of the mass of the polyhydric alcohols; the content of the foam stabilizer is 1.0% of the mass of the polyhydric alcohols. The preparation method comprises the following steps: dividing the raw materials into two components, wherein the component A includes polyisocyanates and the component B includes the polyhydric alcohols and the additives; adding a defined amount of water into the component B; mixing the components A and B and quickly and fully stirring. The polyurethane grouting material prepared according to the preparation method has the advantages of low toxicity, low pollution, excellent grouting performance, low cost, convenience in construction, and the like, and meets national relevant standard and requirement for water plugging construction in China.

The invention discloses an aqueous metal antirust agent and a preparation method thereof. The aqueous metal antirust agent is prepared from following raw materials by weight: 10-20 parts of dodecylbenzenesulfonic acid, 20-30 parts of pentaerythritol tetraoleate, 40-45 parts of butyl oleate, 10-15 parts of o-toluidine, 7-15 parts of sodium sulfate, 10-20 parts of sodium hydroxide, 10-15 parts of sodium silicate and 40-50 parts of water. The aqueous metal antirust agent can be uniformly dispersed in water without impurities such as suspended solids, etc. and has good dispersity. The content of volatile organic compounds is 0.3-0.5 ppm. The content of harmful volatile compounds is low, thus having no harm to human health, and therefore the aqueous metal antirust agent is environment friendly and healthy.

The invention discloses a low-chlorine value biomass briquette fuel. According to the invention, the pretreated corn straws are taken as a raw material for anaerobic fermentation for 10-20 days, so that mechanical endurance of the briquette fuel is increased, magnesium carbonate is taken as an anti-slagging agent, during a combustion process, the Mg element and elements such as Si, K, and Na which are inherent in the corn straws and are capable of slagging are subjected to a reaction, a novel compound K2Mg(SO4)2 is generated and provides anti-slagging performance to the briquette fuel, and the produced briquette fuel has the advantages of low chlorine value and high combustion value, no harmful gas is discharged after combustion is carried out, and a boiler is not easily corroded.

The invention provides boron-silicon phenolic resin suitable for a hot-melt preimpregnation process, a composite material and preparation methods of the boron-silicon phenolic resin and the compositematerial, wherein the boron-silicon phenolic resin comprises the following preparation raw materials in parts by mole: 50-150 parts of phenol, 50-200 parts of aldehyde, 2-150 parts of a boron-containing compound and 1-80 parts of silicate ester; raw materials for preparing the borosilicate phenolic resin further comprise a modifier and a flexibilizer. the dosage relationship among the modifier, the toughening agent and the phenol comprises 100 parts by weight of the phenol, 0-50 parts by weight of the modifier and 0-50 parts by weight of the toughening agent. Compared with a boron-silicon phenolic resin solution, the boron-silicon phenolic resin suitable for the hot-melt preimpregnation process has the advantages of good storage stability, good fiber adhesion, low porosity of a composite material, high mechanical strength and good ablation resistance, and compared with the boron-silicon phenolic resin, Si-O bonds with high bond energy are introduced, so the heat resistance of the boron-silicon phenolic resin is further improved, and the interlayer strength and ablation scouring performance of the composite material product taking the boron-silicon phenolic resin as a base materialare greatly improved.

Disclosed is a secondary air offset whirl pulverized coal burner for a W flame boiler. The problems of high NOx discharge amount, high fly ash combustible matter content, slag-bonding to water walls of front and back walls of a lower combustion chamber and high temperature corrosion of the W flame boiler which is provided with an existing whirl pulverized coal burner on an arch are solved. A circular ring inner secondary air stop block in the circumferential direction is added in inner secondary air on a dividing cylinder of primary air and inner secondary air of the whirl pulverized coal burner; the angle of the circular ring inner secondary air stop block in the circumferential direction is 180 degrees; a circular ring outer secondary air stop block in the circumferential direction is added in outer secondary air on a dividing cylinder of the inner secondary air and the outer secondary air; the angle of the circular ring outer secondary air stop block in the circumferential direction is 180 degrees; the boundary line in the diameter direction of the circular ring inner secondary air stop block and the circular ring outer secondary air stop block is parallel to the front and back walls of the boiler; the circular ring inner secondary air stop block and the circular ring outer secondary air stop block are mounted on one side close to the center of a combustion chamber. The secondary air offset whirl pulverized coal burner is used for the W flame boiler.