52 results about "Heat resistance" patented technology

The invention belongs to the technical field of polymer preparation, and especially relates to a preparation method of a thermoplastic polyurethane elastomer. The method comprises the following steps: 1, putting 1,4-cyclohexyl diisocyanate, polyethylene glycol adipate, 1,4-butylene glycol, a lubricant and a hydrolysis resistance agent in a blender, fully stirring, and fully plastifying in a high-temperature plastifying machine or a high-temperature internal mixer to obtain a thermoplastic polyurethane elastomer matrix; 2, processing an inorganic nanofiller by a silane coupling agent to obtain an modified inorganic nanofiller; and 3, dissolving the thermoplastic polyurethane elastomer matrix in tetrahydrofuran, adding the modified inorganic nanofiller, mechanically stirring, removing tetrahydrofuran, and carrying out film forming to obtain the thermoplastic polyurethane elastomer. Compared with the prior art, the method provided by the invention can effectively increase the heat resistance, the mechanical performances and the ageing resistance of the polyurethane elastomer on the premise that the comprehensive performances of the thermoplastic polyurethane elastomer do not decrease.

The invention belongs to a material used for preparing printed circuit board, more specifically a resin combination and a prepreg used for preparing the printed circuit board. The resin combination uses phenoxy resin, epoxy resin composition, epoxy thinner, amine curing agent, imidazole enhancer and solvent as materials and is prepared in accordance with a certain weight, then the resin combination solution is immersed in glass fiber cloth to make the prepreg. Non-flowing character and the wetting quality of the glass fiber cloth are improved because of the excellent formula of the resin combination, thereby the prepreg used for the printed circuit board has a better non-flowing character, and moisturizing capability, heat resistance, flame retardant, high connectivity with copper foil, and provides high performance material for the printed circuit board product which has a special structure and flexibility-combines with steel.

The invention discloses a processing technology for super-imitated-cotton/fine-denier damp conduction polyester comfortable mercerized velvet warp knitting fabric. The processing technology comprises a super-imitated-cotton fiber technology, a fine-denier damp conduction elasticated polyester filament yarn elasticating technology, a warping technology, a warp knitting fabric weaving technology, a warp knitting fabric dyeing technology and a warp knitting fabric tidying technology. Fine-denier polyester with the damp conduction function and super-imitated-cotton fiber yarn are used for interweaving, the processes of weaving operation conducted by an imported warp knitting machine of a high machine number in the TM2 series and hydrophilic soft finishing conducted by a polyether modified organic silicon finishing agent are conducted, so that the super-imitated-cotton/fine-denier damp conduction polyester comfortable mercerized velvet warp knitting fabric with the good wearability is developed, the developed warp knitting fabric has the advantages of softness, heat retention, a skin-touch friendliness and comfort of cotton and has good mechanical property and heat resistance of polyester, certain defects of common polyester warp knitting nap type knitted products are overcome in the aspect of wearability, and the level and the additional value of the product are improved.

The object of the present invention is to provide a thin film which has excellent heat resistance and water resistance together with excellent flexibility, and a thin film laminate comprising the thin film, and the present invention provides a thin film comprising a heat-resistant fluid between layers comprising heat-resistant flakes.

The invention relates to the technical field of flexible circuit boards, in particular to a halogen-free resin composition. The halogen-free resin composition comprises, by weight, 40-60 parts of polyester-type polyurethane resin, 15-25 parts of polyfunctional epoxy resin, 10-20 parts of phosphorus-containing phenolic resin, 15-25 parts of phosphorus-containing flame retardant and a proper quantity of organic solvent. The polyester-type polyurethane resin contains carboxyl, the acid value is 35 KOHmg/g, and the number-average molecular weight is 10,000-50,000. The polyester-type polyurethane resin containing the carboxyl can be reacted with biphenyl type epoxy resin, and the biphenyl type epoxy resin can be reacted with the phosphorus-containing phenolic resin so that an interpenetrating polymer network structure can be formed. In this way, a cured product has excellent ionic migration resistance and has high flexibility and high heat resistance. The invention further relates to a cover film prepared from the halogen-free resin composition, the excellent ionic migration resistance is achieved, and dendritic crystals can be avoided during ionic migration resistance testing.

Provided is a shaped article for clean rooms comprising a resin composition prepared by melt-kneading 100 parts by weight of a cyclic olefin polymer (A) having a glass transition temperature of from 60 to 200° C., from 1 to 150 parts by weight of a flexible copolymer (B) prepared by polymerizing at least two monomers selected from a group consisting of olefins, dienes and aromatic vinyl-hydrocarbons, and having a glass transition temperature of 0° C. or lower, from 0.001 to 1 part by weight of a radical initiator (C), and from 0 to 1 part by weight of a polyfunctional compound (D) having at least two radical-polymerizable functional groups in the molecule. The shaped article for clean rooms has good chemical resistance, heat resistance and dimensional accuracy, it is inhibited from releasing a volatile component around it, and it has good abrasion resistance and is inhibited from producing particles.

The invention relates to a preparation method of carboxyl-terminated hyperbranched polyester modified organic silicon resin. The method comprises the following steps of: after heating 40 to 60 weight percent of carboxyl-terminated hyperbranched polyester, 1 to 10 weight percent of 3-glycidoxypropyltrimethoxysilane, 30 to 50 weight percent of organic silicon resin and a cross linking catalyst of which the weight percent is 1 to 10 percent of that of the carboxyl-terminated hyperbranched polyester for 1 to 3 hours at the temperature of 110 to 130 DEG C, warming to the temperature of 150 to 180 DEG C and heating for 1 to 3 hours; and finally, reducing the temperature to the room temperature and adding an organic solvent to regulate the solid content to the range of 60 to 70 percent so as to obtain the carboxyl-terminated hyperbranched polyester modified organic silicon resin. The method combines the advantages of the carboxyl-terminated hyperbranched polyester with the organic silicon resin and excellent heat resistance, excellent metal adhesion, low surface energy, excellent boiling resistance and excellent acid resistance are obtained. The resin prepared by the method disclosed by the invention can be used for preparing a coating with high temperature resistance and low surface energy.

The present invention relates to the technical field of water-based coatings, and in particular relates to good-weather and water resistance water-based alkyd resin, alkyd resin is obtained by fatty acid method, and by reaction of epoxy groups of epoxy organosiloxane and alcoholic hydroxyl groups and carboxyl groups of an alkyd resin molecular chain, organosiloxane chain segments are introduced into the water-based resin system for synthesis of the water-based epoxy organosiloxane-modified alkyd resin with excellent water resistance, stain resistance, weather resistance, smoothness and corrosion resistance. An epoxy organosiloxane monomer contains a methoxysilane inorganic active functional group, silicon hydroxyl formed by hydrolysis of the functional group may be condensed with inorganic material surface hydroxyl to improve the water-based alkyd resin adhesion to a metal, glass and plastic substrate, meanwhile by the introduction of the organosiloxane chain segments into the alkyd resin branched portion, the drying properties, weather resistance, heat resistance and water resistance of the water-based alkyd resin can be greatly improved.

A sealing material for optical elements with excellent transparency, crack resistance, and heat resistance which can produce a cured product of the sealing material and a sealed optical element are provided. The sealing material for optical elements comprising a compound with a ladder structure, which contains a repeating unit of the following formula (A) in the molecule as a major component, the compound being obtained by condensing a compound (1) shown by the formula, R¹Si(OR³)_P(X¹)_3-p, and a compound (2) shown by the formula, R²Si(OR⁴)_q(X²)_3-q, at a molar ratio of 1:9 to 10:0 in the presence of a phosphoric acid catalyst,

wherein R¹ represents a group having a reactive functional group, R² represents an alkyl group having 1 to 20 carbon atoms, R³ and R⁴ individually represents an alkyl group having 1 to 6 carbon atoms, X¹ and X² individually indicate a halogen atom, p and q individually represent an integer from 0 to 3, and l, m, and n individually represent 0 or an arbitrary integer, provided that l and n are not 0 at the same time.

A polyester film for forming which has excellent formability especially at a low temperature and low pressure, is excellent in solvent resistance and heat resistance, and is reduced in the burden to be imposed on the environment. The film comprises a biaxially oriented polyester film and is characterized by containing a copolyester and satisfying the following: (1) the stresses at 100% elongation in the machine direction and the transverse direction each is 10 to 1,000 MPa as measured at 25 DEG C and is 1 to 100 MPa as measured at 100 DEG C, (2) the storage moduli (E') in the machine direction and the transverse direction each is 10 to 1,000 MPa as measured at 100 DEG C and is 5 to 40 MPa as measured at 180 DEG C, and (3) the degree of heat distortion (initial load, 49 mN) in the machine direction as measured at 175 DEG C is from -3% to +3%.

Provided is an acrylic flame retardant adhesive composition, including: (A) 100 parts by mass of an acrylic polymer containing a carboxyl group, with a glass transition temperature of 5 to 30° C., (B) 1 to 20 parts by mass of a resol-type phenol resin, (C) 1 to 20 parts by mass of an epoxy resin, (D) 0.1 to 5 parts by mass of a curing accelerator, (E) a bromine-based flame retardant, in sufficient quantity to produce a bromine content within the entire composition, excluding the component (F), of 15 to 40% by mass, and (F) 10 to 100 parts by mass of an inorganic filler. Also provided are an acrylic adhesive sheet that contains an adhesive layer including this composition and a method of bonding two substrates using this acrylic adhesive sheet. The acrylic adhesive sheet exhibits excellent adhesiveness, heat resistance, workability, handling properties and flame retardancy, and the acrylic adhesive composition is useful in the production of such an adhesive sheet.

A modified dimethylnaphthalene formaldehyde resin is disclosed, which is excellent in heat resistance and useful for thermosetting resins which are used for an electrical insulating material, a resin for resist, a semiconductor sealing resin, an adhesive for printed wiring board, a matrix resin for electrical laminate or prepreg to be mounted in electrical instruments, electronic instruments, industrial instruments, etc., a buildup laminate material, a resin for fiber-reinforced plastic, a sealing resin for liquid crystal display panel, a paint, a variety of coating agents, an adhesive, a laminate for electrical or electronic parts, a molded article, a coating material, a sealing material and the like, the modified dimethylnaphthalene formaldehyde resin being obtained by modifying a polyfunctional dimethylnaphthalene formaldehyde resin having a constituent unit represented by the following general formula [1] in a molecule thereof with at least one member selected from the group consisting of a phenol represented by the following general formula [2], a naphthol represented by the following general formula [3] and a naphthol represented by the following general formula [4] (provided that at least any of the naphthol represented by the general formula [3] or the naphthol represented by the general formula [4] must be included).

Environmental-friendly foaming plastic and a preparing method thereof are disclosed. The plastic comprises following raw materials by weight: starch-grafted ABS, polylactic acid (PLA), poly(hydroxy ester ether), plant powder, wood fiber, a silane coupling agent KH550, aluminate, ethylene vinyl acetate copolymer (EVA), polystyrene (PS), dipentaerythritol ester PCB, glycerin, polyethylene wax, azodicarbonamide (AC), p-toluenesulfonhydrazide (TSH), nanometer calcium carbonate, superfine talcum powder, kaolin, titanium dioxide, an antioxidant 2246 and an antioxidant BHT. The plastic has good heat resistance, corrosion resistance and processing performance like traditional foaming plastic and is excellent in biodegradability so as to avoid environment pollution.

A liquid ejection apparatus includes a plurality of liquid ejection heads each comprising a channel member having a plurality of ejection openings, a plurality of channels communicated with the plurality of ejection openings, and a heat body, and a plurality of radiators each provided for each of the plurality of liquid ejection heads. The liquid ejection apparatus further includes a plurality of temperature sensors each provided for each of the plurality of liquid ejection heads and outputting a signal indicating a temperature of the channel member, a heat-resistance change device changing a heat resistance between one of the plurality of radiators and one of the plurality of liquid ejection heads corresponding to the one of the plurality of radiators, and a controller controlling the heat-resistance change device based on the signal outputted from at least one of the plurality of temperature sensors.

It is an object to provide a near infrared light absorbable dye composition which absorbs near infrared light efficiently, has a high visible light transmittance, is excellent in light resistance, heat resistance and wet heat resistance, is hardly deteriorated in durability even when blended so as to have an absorption in a wide range of 800 to 1100 nm, and requires a low cost for synthesis and isolation thereof upon production, and provide a near infrared light absorbable filter containing the same. Provided is the near infrared light absorbable dye composition containing compounds represented by the following formulae (1), (2) and (3):

wherein R¹ to R⁴ represent an organic group which has a carbon atom at a binding position and may have a substituent or a hydrogen atom, R⁵ to R⁸ represent an aliphatic hydrocarbon group or an aryl group which may have a substituent, R¹ and R² and the like may together form a ring; R⁹ and R¹⁰ in the general formula (3) represent R¹ and R² or R³ and R⁴ in the general formula (1), and R¹¹ and R¹² in the general formula (3) represent R⁵ and R⁶ or R⁷ and R⁸ in the general formula (2), respectively.

The invention discloses an oxidation-resistant polymer film with memory function. The oxidation-resistant polymer film with memory function is prepared from carboxylated graphene oxide, nano silicon dioxide, modified kudzu root starch, nano silver, curcumin, proanthocyanidin, vinyl triguaiacyl trimethoxy silane, epoxy soybean oil, nitrile-butadiene rubber powder, tetramethylsilane, dodecylbenzene sulfonic acid, paraffin oil, meerschaum wool, metallocene polyethylene and a polypropylene random copolymer. The polymer film has the advantages of simple components, low cost, no toxicity, no corrosiveness, no impurity, bright surface, impact resistance and tear resistance, is non-combustible, has favorable service performance, and is green and environment-friendly. The polymer film has low ash content, and can enhance the electric properties and high cleanliness of capacitors. The polymer film has excellent heat resistance, is non-combustible, and has high electrochemical activity. The polymer film has high oxidation resistance and stable performance, and thus, can obviously enhance the user stability and service life of the capacitors. The polymer film has the characteristics of high mechanical properties, acid/alkali resistance, corrosion resistance and high recoverability.

The invention discloses heat-resistant modified asphalt, which is prepared from the following raw materials in parts by weight: 140-160 parts of asphalt, 12-16 parts of furan resin, 3-7 parts of dioctyl phthalate, 1-3 parts of sugar alcohol, 2-5 parts of stearamide, 0.8-1.6 parts of mica powder, 0.5-1.2 parts of manufactured sand, 14-16 parts of silicone oil, 3-6 parts of a silane coupling agent, 1-5 parts of an anti-aging agent and 2-6 parts of heat-resistant additives. According to the heat-resistant modified asphalt disclosed by the invention, the performance of the asphalt under a high-temperature condition is improved due to addition of the heat-resistant additive; a mixture of sodium silicate, polyurethane, titanium dioxide and phenolic resin are taken as the heat-resistant additives; the heat resistance is good; the strength of the asphalt can be improved; the viscosity and the ageing resistance of the asphalt are improved due to addition of furan resin, dioctyl phthalate, sugar alcohol, stearamide, mica powder, the manufactured sand, silicone oil, silane coupling agent and the anti-aging agent; and the use of the asphalt under the high-temperature condition is met.

The invention discloses a special adhesive sticker for an ethylene propylene diene monomer heat resistance conveyor belt and a preparation method of the special adhesive sticker. The adhesive stickertaking ethylene propylene diene monomer, maleic anhydride butadiene and dicumyl peroxide as a body is developed for the first time, the ethylene propylene diene monomer adhesive sticker and a polyester canvas (unimpregnated) have excellent adhesive effects, the ethylene propylene diene monomer adhesive sticker and ethylene propylene diene monomer covering rubber also have good adhesive strength, the problem of adhesion property reduction after aging due to natural rubber and butadiene styrene rubber serving as adhesive rubber in a high-temperature-resistant conveyor belt can be thoroughly solved, and the structure of the high-temperature-resistant conveyor belt is optimized. Anti-aging agents in ethylene propylene diene monomer materials with high adhesion property are removed, degradationof the polyester canvas can be relieved, and the service life of the polyester canvas is prolonged.

The invention discloses a flame-retardant modified ramie fabric/benzoxazine resin laminated board. The laminated board comprises multiple layers of assembling units. Each layer of assembling unit comprises an internal ramie fabric layer and a bonding layer on the surface of a ramie fabric, wherein the outer surface of the ramie fabric layer is coated with a titanate layer or a titanate layer and 10-30 fire retardant layers, the bonding layer is a mixed catalyst containing benzoxazine resin bonding layer, and the mixed catalyst is composed of methyl p-toluenesulfonate and acetylacetone ferric salt. The laminated board has a good flame-retardant effect, can have good mechanical properties and heat resistance at the same time and is good in comprehensive performance.

The present invention is to provide a photocurable fluorinated copolymer composition which is uniform and excellent in transparency, and a coating film layer obtainable by using it, is excellent in heat resistance and abrasion resistance and exhibits a particularly excellent weather resistance performance. The photocurable fluorinated copolymer composition comprises a specific fluorinated copolymer (A), a specific hydrolysable silane compound (B), an epoxy resin (C) having a cyclohexane ring structure, and a photoreaction initiator (D).

The invention discloses a flame-retardant and wear-resisting rubber material for a borehole cable sheath and a preparation method of the flame-retardant and wear-resisting rubber material. The flame-retardant and wear-resisting rubber material is prepared from nitrile rubber, natural rubber, triethyl citrate, benzoxazine resin, magnesium dimethacrylate, acetyl benzoyl peroxide, ethanol [2-[2-(2-methoxyethoxy)ethoxy]ethyl], triester with boric acid, gamma-aminopropyltriethoxysilane, polychlorinated terphenyl, dimethyldiethoxysilane, tricresyl phosphate, magnesium hydroxide, white jade powder, microcrystalline wax, hydrogenated rosin resin and the like. By matching the nitrile rubber with the natural rubber for use, the flame-retardant and wear-resisting rubber material has the advantages of good mechanical property and processing property, good oil resistance, wear resistance and chemical corrosion resistance, as well as heat resistance and low temperature resistance; by matching the tricresyl phosphate, the polychlorinated terphenyl and the magnesium hydroxide with sodium aluminum carbonate hydroxide for use, the fire-retardant property is enhanced; by adding the white jade powder, nano- tungsten boride and other fillers, high temperature resistance, wear resistance and other physical properties of the material are enhanced.

The utility model discloses a heat-resistant vinyl aromatic monomer copolymer compounding method. The method used amine in the axe-type reaction device as the amine imide agent and enables the vinyl aromatic monomer - maleic anhydride unit opening ring of the maleic anhydride copolymer to become the maleic acid amide unit in the organic solution system; and then the vinyl aromatic monomer is arranged in the axe-type reaction device or in a exhaust twin-screw extruding device for reaction. Then the vinyl aromatic monomer is gotten rid of organic solution and is dried to generate heat-resistant vinyl aromatic monomer copolymer. The heat-resistant vinyl aromatic monomer copolymer generated in the method is of good anti heat resistance, thermal stability, processing mobility as well as compatibility with polar material.

The invention relates to the technical field of intelligent equipment detection, and provides a sound detection device using magnetorheological fluid, which comprises a sound detection device, the left side and the right side of the sound detection device are fixedly connected with magnetorheological fluid suspension bodies, and the center of the sound detection device is fixedly connected with asound source driver. The left side and the right side of the sound detection device are fixedly connected with detection outer frames, and the inner side of the sound detection device is fixedly connected with a sound part through the detection outer frames. According to the sound detection device utilizing magnetorheological fluid, when the sound equipment part works normally on the inner side, the detection outer frames are closed spaces, and air in the detection outer frames is heated. According to the principle of thermal expansion and cold contraction, the temperature rise of the air in the outer frame is detected, the expansion and extrusion air in the outer frame is detected, the air is sucked in from the folding frame, the air flow is introduced into the temperature measuring device through the ventilation tank, and through observing the temperature rise data of the temperature measuring meter, the heat resistance of the manufacturing material of the sound component and whetherthe released heat is normal can be detected.