89results 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 T_g 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 T_g, 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 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.

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.

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.

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.

The invention provides a soldering flux composition containing acrylic resin used for soldering and a soldering paste composition. The soldering flux composition is provided with the good soldering performance and the good insulation performance, and can be used to prevent the adhesive performance of the soldering flux residual, and can be used to inhibit the cracks of the soldering flux residual, even under the long-term cold-heat circulation condition. The soldering flux composition is characterized in that the acrylic resin and the activator are provided; the acrylic resin can be formed by copolymerizing the monomers of the composition expressed by the formula 1; according to the formula 1, the R1 is hydrogen atom or the methyl, and the R2 and the R3 respectively expresses the saturated alkyl having 2-30 carbon numbers, and are respectively provided with the direct chain structure of the carbon chain, and no branch chain structure is provided.