92results about How to "Lower Tg" patented technology

Plasticizer blends comprise a triblend of diethylene glycol dibenzoate, dipropylene glycol dibenzoate, and 1,2-propylene glycol dibenzoate, in specified ratios, useful in combination with a multitude of thermoplastic polymers, thermosetting polymers, and elastomeric polymers and numerous applications, including but not limited to plastisols, adhesives, sealants, caulks, architectural coatings, industrial coatings, OEM coatings, inks, overprint varnishes, polishes, and the like. The advantages rendered by the use of the triblend depend on the type of polymer and application in which it is utilized and include among other advantages higher solvating power and lower processing time, low VOC's, reduced plasticizer freeze point, improved gelation and fusion characteristics, higher tensile strength, superior stain and extraction resistance, and improved rheology over traditional diblends of diethylene glycol dibenzoate and dipropylene glycol dibenzoate.

In the present invention an adhesive composition is provided. The adhesive composition includes epoxidized cashew nutshell liquid, a catalyst, and diglycidyl ether of bisphenol A. The invention may further include at least one additive selected from the group including curing agents, bonding enhancers, hardeners, flexibilizers, tackifiers, and mixtures thereof.

The invention relates to an acrylic ester elastic emulsion of a room temperature self-crosslinking core-shell structure and a preparing method thereof, and belongs to the field of macromolecular polymer. The purpose of the invention is to improve the application requirements of elastic coating, such as low-temperature elasticity and anti-contamination, tensile strength and flexibility and the like. The technical scheme adopted in the invention is as follows: using a core-shell polymerization process, introducing cross-linking monomer to shell layer, designing core layer glass state temperature (Tg) to be minus 40 to minus 15 DEG C and shell layer glass state temperature Tg to be 5 to 40 DEG C, and after polymerization of the emulsion and regulating pH to be 8 to 9, adding a certain amount of cross-linking agent, and obtaining the room temperature self-crosslinking elastic emulsion of core-shell structure. The elastic emulsion prepared by the invention can be self-crosslinked at room temperature, and has excellent low-temperature elasticity, scratch resistance, anti-contamination and surface finish, and can meet the requirements of actual application.

Actuation and control of the deployment of a polymeric memory-shape material on a wellbore device on a downhole tool may be accomplished by treating a compacted or compressed polymeric memory-shape material with a deployment fluid to lower its Tg and / or decrease its rigidity, thereby softening the polymeric shape-memory material at a given temperature and triggering its expansion or recovery at a lower temperature. Alternatively, the deployment of the compacted or compressed polymeric memory-shape material may be prevented or inhibited by shielding the material with an environment of a fluid that does not substantially lower its Tg, decrease its rigidity or both, and then subsequently contacting the material with a deployment fluid.

The invention discloses a camellia nitidissima Chi flower extract as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing camellia nitidissima Chi flower with shell powder, mechanically smashing through a press-shear assisted interaction technology and extracting through water or ethyl alcohol, wherein the extraction temperature is 80-100 DEG C, the camellia nitidissima Chi flower extract contains 20-40 wt% of total flavonoids, 20-40 wt% of saccharides, 1-10 wt% of tea polyphenol and 1-10 wt% of total saponins. The invention further provides application of the camellia nitidissima Chi flower extract to preparation of drugs for treating or preventing non-alcoholic fatty liver. The camellia nitidissima Chi flower extract provided by the invention can reduce the fatty liver level of the non-alcoholic fatty liver, reduce both TG and TC in blood and the liver and has less toxic and side effects and a better treatment and prevention effect on the non-alcoholic fatty liver.

In a semiconductor pressure sensor device comprising a housing (1) having a cavity (3), a semiconductor sensor chip (2) mounted within the cavity, leads (4) for conveying pressure detection signals, and bonding wires (6) electrically connecting the sensor chip and the leads, a sensitive portion (2a) of sensor chip (2), leads (4) and bonding wires (6) are covered with an electrically insulating fluorochemical gel material which has a penetration of 30-60 according to JIS K2220, a Tg of up to −45° C., and a degree of saturation swelling in gasoline at 23° C. of up to 7% by weight. The sensor device is improved in operation reliability and durability life.

A varnish composition includes composition (A): an epoxy resin, composition (B): a hardener, composition (C): an accelerator, composition (D): phosphor-containing flame retardant, and composition (E): fillers, wherein composition (A) includes composition (A-1): phosphor-containing epoxy resin, phosphor-containing and silicon-containing epoxy resin, or a mixture thereof; composition (A-2): dicyclopentadiene epoxy resin; and composition (A-3): oxazolidone epoxy resin.

A curable resin composition comprises: (I) 100 parts by-weight of a curable resin; (II) 10 to 1200 parts by weight of an inorganic filler; and (III) 1 to 100 parts by weight of an organic filler having an elastic modulus of 1 to 2000 (MPa) and an average particle diameter of 0.01 to 10 μm, wherein a content weight ratio of the components (II) and (III) is 1 to 41.

The invention discloses a low-internal-stress acrylic emulsion. The emulsion is prepared from the following raw materials in parts by weight: 80-120 parts of distilled water, 30 to 50 parts of methylmethacrylate, 40 to 70 parts of alkyl acrylate, 0.5 to 5 parts of an acrylic hydrophilic monomer, 1 to 5 parts of an emulsifier, 0.05 to 0.2 part of a crosslinking monomer, 0.1 to 1 part of a functional monomer for increasing the adhesive force, 0.3 to 1 part of an initiator, 0.1 to 0.5 part of an oxidant, 0.1 to 0.5 part of a reducing agent and 2 to 20 parts of a pH regulator. The low-internal-stress acrylic emulsion is simple in synthesis process and beneficial to production, meanwhile, a seed emulsion polymerization process is adopted, the size distribution range of emulsion particles can be reduced, the solid content of the emulsion is 40-60%, and the particle size is 0.1-0.3 [mu]m. A post-elimination process is carried out at the later stage of the reaction, so that a final finished product has relatively small smell.

The invention provides organic silicon-acrylic ester copolymer emulsion, which utilizes organic silicon, methyl methacrylate, butyl acrylate, unsaturated alkyl acid and methacrylic acid-beta-hydroxypropyl ester as comonomers, utilizes deionized water as solvent, utilizes potassium peroxydisulfate or ammonium persulfate as an initiator and utilizes sodium bicarbonate as a neutralizer, and is prepared by polymerization in the presence of an emulsifying agent. The emulsion introduces the organic silicon into polyacrylate, the rigidness of a copolymer is improved to a certain extent, and cohesion of the copolymer emulsion is improved due to the introduction of a polar group. Interior wall humidity-conditioning paint prepared by the copolymer emulsion serving as a film former integrates multiple functions of decoration, humidity conditioning performance, permeability, insulation and anti-condensation performance, water resistance, alkali resistance, alkali-resistant performance and antibiosis, the paint film is durable and long in service life, and the organic silicon-acrylic ester copolymer emulsion serving as the interior wall humidity-conditioning paint has application prospects.

The present invention relates to a textile implant, in particular for repairing hernias, the implant comprising a textile piece having a first face completely or partially covered in a bio-adhesive composition that is hydrosoluble and absorbable and that comprises at least one bio-adhesive polymer that is hydrosoluble and absorbable, with the adhesive function thereof being activatable in a moist or wet medium. In characteristic manner, said bio-adhesive composition includes less than 4% by weight of plasticizer.

A curable resin composition comprises: (I) 100 parts by weight of a curable resin; (II) 10 to 1200 parts by weight of an inorganic filler; and (III) 1 to 100 parts by weight of an organic filler having an elastic modulus of 1 to 2000 (MPa) and an average particle diameter of 0.01 to 10 v, wherein a content weight ratio of the components (II) and (III) is 1 to 41.

A coalescent composition for coating compositions such as paints, adhesives, and coatings comprising a blend of diesters, the blend comprising adducts of alcohol and diacids, the alcohol selected from the group consisting of ethyl, propyl, isopropyl alcohol and mixtures thereof, and the diacids selected from the group consisting of a blend of adipic, glutaric and succinic diacids (“AGS”) and a blend of adipic, methylglutaric, and ethylsuccinic diacids (“MGA”), and paint, adhesive, and coating compositions comprising such coalescent compositions are disclosed.

The invention discloses long-chain monomer modified polyacrylic ester emulsion, which is prepared from the following ingredients in percentage by mass: 1.0 to 3.0 percent of anionic surfactants, 0.3 to 0.9 percent of nonionic surfactants, 10 to 20 percent of acrylate monomers, 10 to 20 percent of methacrylate monomers, 0.3 to 3.0 percent of modified monomers, 0.06 to 0.24 percent of initiators andthe balance of water. The modified monomers are long-chain polyacrylic ester with the side chain carbon atom number being greater than 10. The long-chain monomer modified polyacrylic ester emulsion has the advantages that the particle diameter of the latex particles is small; the application field of the polyacrylic ester emulsion is expanded. The invention also discloses a preparation method ofthe long-chain monomer modified polyacrylic ester emulsion. The semi-continuous seed emulsion polymerization is performed; the operation is simple. The invention also discloses application of the long-chain monomer modified polyacrylic ester emulsion in paint preparation.

The invention provides a preparation method of nylon 6 having high hygroscopicity, high dyeing property and high elasticity, The method is characterized by adding 50-85 parts of caprolactam, 5-8.5 parts of ring-opening agent, 0.3-6 parts of dicarboxylic acid blocking agent and 0.3-6 parts of composite amine modifier into to a reaction vessel; under the protection of nitrogen, preparing composite amine / polyamide performed polymer through ring opening, normal-pressure polymerization and reduced-pressure polymerization; adding polyether with same number of moles as the dicarboxylic acid blocking agent, preparing composite amine / polyether / polycaprolactam copolymer in the presence of a catalyst through normal-pressure polymerization and reduced-pressure polymerization; and extracting and drying to obtain the final product of nylon 6 with high hygroscopicity, high dyeing property and high elasticity. According to the invention, the method has simple process, production can be performed by using existing equipment, and nylon 6 not only has excellent physical and mechanical properties, but also has good spinnability, optical / thermal stability, elasticity, hygroscopicity and dyeing property, thus not only having enhanced dying depth and dying uniformity, but also being capable of being applied to chemical fiber, engineering plastics, membrane materials and the like.

Aqueous solutions of inorganic nitrate salts are used to accelerate the gelling of epoxy gelcoat resins without adversely affecting the glass transition temperature of the finally cured gelcoat. The aqueous accelerants may be used to accelerate gelling of gelcoats that are formed during initial fabrication of composite parts. The aqueous acclerants are also useful for shortening the gel time of gelcoats that are intended for use in repairing damaged structures.

A coalescent composition for coating compositions such as paints, adhesives, and coatings comprising a blend of diesters, the blend comprising adducts of alcohol and diacids, the alcohol selected from the group consisting of ethyl, propyl, isopropyl alcohol and mixtures thereof, and the diacids selected from the group consisting of a blend of adipic, glutaric and succinic diacids (“AGS”) and a blend of adipic, methylglutaric, and ethylsuccinic diacids (“MGA”), and paint, adhesive, and coating compositions comprising such coalescent compositions are disclosed.

The invention discloses a method for preparing modified epoxy acrylate. The method comprises the following steps of: (1) synthesizing an intermediate: adding anhydride, hydroxyl acrylate monomers, an anti-oxidant 1 and a polymerization inhibitor 1 in turn into a reaction kettle in turn, uniformly stirring, heating to the temperature of between 80 and 120DEG C, reacting for 2 to 3 hours, and discharging a material (marked as A) for later use; (2) expanding chain of organic acid: adding epoxy resin, organic diacid and a catalyst 1 into the reaction kettle in a formula ratio, uniformly stirring,slowly heating to the temperature of between 90 and 120DEG C, reacting for 2 to 3 hours, and after the acid value is less than or equal to 1mgKOH / g, starting cooling water to cool to the temperature of between 50 and 70DEG C; (3) heating for esterification: adding the material A, a catalyst 2, a polymerization inhibitor 2 and an anti-oxidant 2 into the reaction kettle in a formula ratio in turn, heating and keeping temperature; (4) cooling and diluting; and (5) performing central control inspection. The molecular weight can be properly increased, flexible groups can be increased, and the glass-transition temperature of the product is reduced.

The invention discloses a polymer emulsion interpenetrated with polyurethane / polyacrylacid ester and the preparation method. Said polymer emulsion is introduced with vinyl ether group, the structural formula is R- (O-R1)n, R is the main body of said polymer emulsion, R1 is vinyl- containing group, n is 1- 4. The invention employs multiple crosslinking technique to introduce vinyl ether group into said polymer emulsion, which reduces filming temperature and increases physical and decoration property for said polymer emulsion. There is no inhibiting action for vinyl ether polymerization by oxygen, so the surface dry and storage problem for general water- brone oxiding system can be solved. The product in this invention is mainly used for wood, metal and plastic coating and protection.

The invention relates to a PC / ABS alloy with a good-appearance high-intensity weld line and a preparation method thereof. The PC / ABS alloy comprises the following components in part by weight: 50 to 70 parts of PC, 30 to 40 parts of ABS, 5 to 10 parts of toughening agent, 1 to 10 parts of weld line modifier, and 0.1 to 10 parts of antioxygen. The raw materials are put into an intermediate speed mixer to be mixed for 10 to 30 minutes so as to form mixed materials; and the mixed materials are put into a double-screw extruder, the rotating speed of the screw is controlled between 180 and 600 rpm, and the mixed materials are subjected to melt extrusion and granulation to form the product. Compared with the prior art, the PC / ABS alloy has the characteristics of good-appearance high-intensity weld line, and the like.

Provided are a shape memory polymer composition, which comprises a bifunctional isocyanate and / or a trifunctional isocyanate, and a polyol having an average molecular weight of from 100 to 550, with a molar ratio in terms of functional groups of isocyanate:polyol=0.9 to 1.1:1.0; FRP having the shape memory polymer and a fibrous material; and a production process of the FRP comprising impregnating the fibrous material with, as a matrix resin, the shape memory polymer composition and curing. According to the present invention, the shape memory polymer composition has an extended pot life and FRP has excellent inflatability.

The invention provides a preparation method of a roxburgh anoectochilus terminal bud extracts containing kinsenoside and application of the extracts. The roxburgh anoectochilus terminal bud extracts are is prepared from roxburgh anoectochilus terminal bud extraction liquid, roxburgh anoectochilus terminal bud thick paste, roxburgh anoectochilus terminal bud dry paste and roxburgh anoectochilus terminal bud dry paste powder. The preparation method comprises the work procedures of medical material alcohol extraction, water extraction, reduced pressure concentration, drying, crushing and the like. The method has the advantages that the transfer rate of the effective ingredient of the kinsenoside can be improved by 50 percent or higher through being comparedin comparison with a conventional water extraction process; the utilization rate of the rare medicinal materials is obviously improved; the process operability is high; the repeated performance is good; the equipment requirement is low;the preparation method is applicable to industrialized production. The roxburgh anoectochilus terminal bud extracts prepared by the method can be used for preparing health care food; the taking and the carrying of the finished product are is convenient to take and carry; the quality is stable; the auxiliary protection effect is achieved on the chemical liver damage; the effects of assistance in reducing the blood fat in an auxiliary way and reducing the blood sugar in an auxiliary way areis obvious.

The present invention provides processes for making and forms of solid dispersions of pharmaceutical active ingredients.

The invention discloses a formula of a snow tire. The formula of the snow tire comprises the following components: 5-15% of natural rubber, 20-40% of solution polymerized styrene butadiene rubber, 15-30% of high abrasion proof carbon black N234, 10-20% of high dispersion white carbon black, 0.5-1% of a peptizer A-8, 0.5-1.5% of a chemical antioxidant 6PPD, 0.5-1.5% of a physical antioxidant microcrystalline wax, 1-3% of an active agent ZNO, 1-3% of an active agent SA, 0.5-1.5% of polyethylene glycol (PEG), 1-3% of a vulcanizing agent S-325, 0.5-1.5% of an accelerant CZ, 0.1-0.5% of a special agent CTP and 4-8% of a coupling agent SI69. The technical scheme provided by the invention has the beneficial effects of low hardness and good elasticity of tire surface glue, low vitrification point of rubber, high wear resistance, good road holding performance on ice and snow covered pavement; therefore, the snow tire can effectively avoid skidding on ice and snow covered pavement, and enhance road safety.

An orally taken Chinese medicine for treating fatty liver is prepared from 7 Chinese-medicinal materials including fleece flower root, red sage root, alismatis rhizome, lotus leaf, etc. Its preparing process is also disclosed.

The invention relates to compressing cold-tolerant special hydrogenated butyronitrile rubber and a preparation method thereof. A main chain of the rubber contains an epoxy group and a part of the epoxy group is connected with an ester side group; the ester side group is generated by ring-opening reaction of anhydride of C6-C24 and the epoxy group. The preparation method comprises the steps of introducing the epoxy group in the molecular main chain of the rubber so as to react part of the epoxy group with the anhydride under the action of a catalyst, and introducing the ester group to obtain the special hydrogenated butyronitrile rubber. According to the special hydrogenated butyronitrile rubber provided by the invention, the glass transition temperature is low, a crystallization area does not exist and the compressing cold-tolerant coefficient reaches 0.4, so that the special hydrogenated butyronitrile rubber is special rubber with excellent compressing cold-tolerant performance. The epoxy group and the ester group are introduced into the rubber, so that the compressing cold-tolerant performance is improved and excellent oil resistance is guaranteed.

The invention relates to a thermosetting epoxy resin composition and an epoxy fiberglass cloth-based copper clad laminate prepared from the same. The thermosetting epoxy resin composition comprises the following components: epoxy resin, poly(1,4-butanediol) bis(4-aminobenzoate) and a curing agent. The epoxy fiberglass cloth-based copper clad laminate prepared from the thermosetting epoxy resin composition comprises a plurality of mutually overlapped prepregs, and copper foils arranged on one side or two sides of the overlapped prepregs, wherein each prepreg comprises fiberglass cloth and the thermosetting epoxy resin composition which is subjected to impregnated drying and attached to the fiberglass cloth. The poly(1,4-butanediol) bis(4-aminobenzoate) is adopted as a flexibilizer, so thatgood flexibility is achieved and the glass transition temperature (Tg) of a prepared board is slightly reduced or not reduced, and a general problem that the Tg of the copper clad laminate is reduceddue to conventional flexibilizers in the prior art is solved. The flexibility of the epoxy fiberglass cloth-based copper clad laminate is obviously improved, and the epoxy fiberglass cloth-based copper clad laminate can partially replace high-cost flexible copper clad laminate in places such as rigid-flex boards, static flexibility, parallel lifting and the like.

A silicon substrate 1 has a structure in which a depression of a silicon crystal is formed on at least one principal surface 2 side of a crystalline silicon substrate and which has a vitreous region 3 filled in the depression and consisting primarily of silicon oxide. The vitreous region 3 is formed so that the glass transition temperature Tg thereof is lower than that of pure silica glass and not more than 900° C. This configuration realizes the silicon substrate in which internal strain is reduced between glass and the silicon crystal, and a forming method thereof.

Actuation and control of the deployment of a polymeric memory-shape material on a wellbore device on a downhole tool may be accomplished by treating a compacted or compressed polymeric memory-shape material with a deployment fluid to lower its Tg and / or decrease its rigidity, thereby softening the polymeric shape-memory material at a given temperature and triggering its expansion or recovery at a lower temperature. Alternatively, the deployment of the compacted or compressed polymeric memory-shape material may be prevented or inhibited by shielding the material with an environment of a fluid that does not substantially lower its Tg, decrease its rigidity or both, and then subsequently contacting the material with a deployment fluid.