83 results about "Tetrahydrophthalamic acid" patented technology

A hot melt adhesive composition comprising: (a) a functional copolymer obtained from copolymerization of ethylene and a comonomer selected from maleic anhydride, citraconic anhydride, itaconic anhydride, tetrahydrophthalic anhydride, maleic acid, citraconic acid, itaconic acid, fumaric acid, tetrahydrophthalic acid, the corresponding salts, monoesters and diesters of these acids, and mixtures of any of these, wherein the functional copolymer is present in an amount from about 5 to about 95 weight % of the combined total amount of (a) and (b); and (b) at least one ethylene copolymer obtained from copolymerization of ethylene with a polar monomer wherein said polar comonomer is present in the copolymer in an amount of from 8 to 40 weight %, wherein said ethylene copolymer is selected from the group consisting of ethylene/vinyl acetate copolymers, ethylene/alkyl (meth)acrylate copolymers and ethylene/alkyl (meth)acrylate/carbon monoxide terpolymers, in an amount from about 5 to about 95 weight % of the combined total amount of (a) and (b); wherein the composition has a melt index of 100 grams/10 minutes or higher. Articles comprising and process using the hot melt adhesive are also disclosed.

A preparation method of POSS (polyhedral oligomeric silsesquioxane) modified polyurethane resin comprises the following steps: preparing POSS diol by using trihydroxy cage-like siloxane heptamer, triethylamine, tetrahydrofuran, SiCl4, dimethylchlorosilane, tetrahydrophthalic anhydride, LiAlH4 and potassium sodium tartrate; and polymerizing the POSS diol, polyether diol, polyester diol and isocyanate to obtain the POSS modified polyurethane resin. The method allows the novel POSS modified polyurethane resin to be obtained by using the POSS diol, and can effectively overcome the compatibility problem existing in the modification of common inorganic substances; and the obtained POSS modified polyurethane resin has large tensile strength, impact strength, shearing strength and other mechanical performances, and also has the advantages of low surface energy, good heat resistance and good wear resistance.

The invention relates to a heat conduction insulating casting glue and a preparation method thereof. The casting compound comprises the following main components in parts by weight: (A) 100 parts of hydantoin epoxy resin, (B) 60-120 parts of anhydride curing agent, and (C) 200-400 parts of inorganic heat conductive filler, wherein the component A (per 100 weight parts) contains 10-15 weight partsof alcohol plasticizer; the component B is one or more of hexahydrophthalic anhydride, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride and methylnadic anhydride; and the component C is one or more of silica micropowder, aluminum oxide, aluminum nitride and boron nitride in 300-900 meshes. The preparation method of the casting compound comprises the following steps: mixing A and B proportionally; soaking C in ethanol solution of silane coupling agent, dispersing at a high speed, filtering, and oven-drying; heating the mixture of A and B, adding C, mixing, and debubbling; and casing, and curing. The casting compound provided by the invention has low viscosity, greatly improved heat-conducting property and improved mechanical properties, and is convenient in casting. The preparation method of the casting compound is solvent-free, and has no pollution to the environment.

Disclosed are a β-crystal form nucleating agent composition for polypropylene and an application thereof. The composition is prepared by proportionally mixing barium tetrahydrophthalate, calcium tetrahydrophthalate and the like with adjuvants, such as hydrotalcite or calcium carbonate. The composition has better functions than a single-component β-nucleating agent. The impact strength of polypropylene subjected to nucleation modification by the β-crystal form nucleating agent composition can be improved by up to 6 times, and the heat distortion temperature is improved by about 10° C. to 20° C.; in addition, while the impact strength is improved, the flexural modulus of polypropylene can be improved, namely, the rigidity of polypropylene is improved. Therefore, the mechanical and thermal properties of polypropylene are improved. The use amount of the composition is low, and the application range of polypropylene is expanded; the β-crystal form nucleating agent composition for polypropylene can be widely used in the processing application of polypropylene resin.

The invention relates to a red mud curing agent for paving a road and a preparation method of the red mud curing agent. The red mud curing agent is made of silicon oxide, aluminum oxide, calcium oxide, industrial byproduct alkali residue, tetrahydrophthalic anhydride and ethylene glycol double trimellitic anhydride ester. According to the preparation method, the active matters, such as silicon oxide, aluminum oxide and calcium oxide, are mixed; the active constituents of the matters are matched with one another, thereby obtaining curing agent and red mud; after being stirred, the curing agent and the red mud are subjected to ion exchange under the catalysis of concentrated material, thereby boosting the coagulation of red mud particles; and meanwhile, the red mud is coagulated and hardened, under the hydration reaction of a gelled material in the curing agent; the red mud has higher working strength within a short period of time; and the exosmose of heavy metal, radioactive elements and the like, is avoided. The red mud curing agent prepared by the preparation method disclosed by the invention is used together with red mud for paving the road. Compared with the prior art, the red mud curing agent has the advantages of high strength, excellent plate property, high durability, excellent water stability, excellent frost and melt resistance, excellent air shrinkage resistance, and the like.

The invention provides a heat transfer printing ink ribbon for a metal material. The heat transfer printing ink ribbon for the metal material comprises a base membrane layer, wherein a heat transfer printing ink layer is arranged on one side of the base membrane layer, and a back coating is arranged on the other side of the base membrane layer. The heat transfer printing ink layer comprises, by weight, 20-25% of thermoplastic acrylic resin, 10-20% of E-20 bisphenol A epoxy resin, 5-10% of E-12 bisphenol A epoxy resin, 3-6% of tetra hydro phthalic anhydride, 20-35% of compound wax, 0.5-1% of 2-hydroxy ethyl methacrylate phosphate, 8-15% of coloring agents and 10-20% of solvent. According to the heat transfer printing ink ribbon, application of the heat transfer printing ink ribbon to metal printing media is achieved, the adhesion to metal is good, and the purpose that heat transfer printing operation is directly conducted on the metal printing media is achieved; the scraping resistance is good, printed patterns are clear and complete, and the application range of the heat transfer printing ink ribbon is broadened.

The invention relates to a preparing method of polyhedral oligomeric silsesquioxane(POSS) modified poly-butylene succinate (PBS). 3-hydroxy siloxane heptamer cage-like siloxane, triethylamine, tetrahydrofuran, SiCl4, dimethyl chlorosilane, tetralin phthalic anhydride, LiAlH4 and potassium sodium tartrate are used for preparing POSS dihydric alcohol; and the POSS dihydric alcohol, succinic acid and butanediol are subject to esterification-polycondensation, and POSS modified PBS polyester is obtained. In the preparing method, the POSS dihydric alcohol is prepared, the hydroxyl reaction activity is achieved, and the problem about consistency in common inorganic substance modification can be effectively solved. The modified material has the mechanical property better than that of original PBS, for example, the tensile strength, the impact strength and the bending strength are high; and the preparing method has the beneficial effects that the surface energy is low, the heat resistance is good, and the abrasive resistance is excellent.

The invention discloses a production method of 1,2,3,6-tetrahydrophthalimide, and belongs to the field of organic chemical synthesis. According to the method, 1,2,3,6-tetrahydrophthalic anhydride andammonia water are used as raw materials, excess water is distilled out while reacting at a certain raw material ratio and reaction temperature, and after the reaction is finished, the reaction solution is recrystallized by using distilled water. A crude product obtained by recrystallization is then centrifuged and dried to obtain a finished product of 1,2,3,6-tetrahydrophthalimide. The method hasthe advantages of mild reaction condition, easy control, high raw material conversion rate, and high product yield reaching 86% or more. The obtained product is a white needle crystal with high purityreaching 99.5% or more. The production method avoids the defects of large potential safety hazard and more waste gas generated in the traditional process, is more green and environment-friendly, hasa simple preparation process and a lower cost, is favorable for large-scale production, and has a good development prospect.

Disclosed is an oxygen-absorbable solvent-soluble resin having both oxygen absorbability and adhesive properties. Specifically disclosed is an oxygen-absorbable solvent-soluble resin which comprises an acid component (A), an acid component (B) and a polyester having a constituent unit derived from a glycol component, wherein the ratio of the amount of the acid component (A) to the total amount of the acid components is 40 to 80 mol % and the ratio of the amount of the acid component (B) to the total amount of the acid components is 15 to 35 mol %. The acid component (A): tetrahydrophthalic acid or a derivative thereof, or tetrahydrophthalic anhydride or a derivative thereof; and the acid component (B): terephthalic acid.

A method for the synthesis of a dianhydride comprises transimidation of bis (imide) (IV)in the presence of a substituted phthalic anhydride or 4-substituted tetrahydrophthalic anhydride to yield dianhydride (V)

The invention discloses a synthetic method for aza-bicyclo octane[3.3.0] derivatives as represented by formula (I). According to the invention, 1,2,3,6-tetrahydrophthalic anhydride as represented by formula (XI) is used as a raw material and successively undergoes esterification, oxidation, cyclodecarboxylation, a ketal protection reaction for carbonyl groups, reduction, an easily-leaving cyclization group reaction on the carbonyl groups, a cyclization reaction for removal of easily-leaving groups, removal of substituted benzyl groups, a PG reaction on N atoms and removal of ketal protective groups so as to prepare the aza-bicyclo octane[3.3.0] derivatives as represented by formula (I). The invention has the following advantages: reaction conditions are mild; the raw material is easily available and cheap; synthetic route is simple; high yield is obtained; the products, i.e., the aza-bicyclo octane[3.3.0] derivatives can be extensively applied in industrial mass production as important medical intermediates.

A method for the synthesis of substituted phthalic anhydrides (IV)wherein R' is a halogen, aromatic or aliphatic group comprising 1-18 carbons, hydrogen or nitro group is the transimidation between a substituted N-alkyl phthalimide (V)wherein R is an alkyl having from 1 to 18 carbons, and a substituted tetrahydrophthalic anhydride (VI):The by-product of this reaction, a substituted N-alkyl tetrahydrophthalimide (VII), may be converted by aromatization to the substituted N-alkyl phthalimide (V).

The invention discloses a disposable degradable table cloth. The invention is characterized in that the disposable degradable table cloth comprises the following raw materials in parts by weight: 20-25 parts of polyethylene, 50-75 parts of superfine calcium carbonate, 2-5 parts of hollow glass microsphere, 0.1-0.5 part of photodegradation agent, 0.5-2 parts of degradation induction period regulator and 0.1-0.5 part of calcium tetrahydrophthalate. The invention also discloses a production technique of the disposable degradable table cloth. The calcium carbonate loading level of the table cloth is 50% or above, thereby saving the cost, implementing quick degradation in the natural environment and keeping higher comprehensive properties (especially strength and flexibility); and the table cloth can not easily break when in use.

The invention relates to a safe PVC (polyvinyl chloride) food preservative film. The safe PVC food preservative film comprises the following components: 100 parts of polyethylene, 2 parts of dioctyl tetrahydrophthalate, 4 parts of modified starch, 5 parts of plant polysaccharides, 4 parts of squalane, dioctyladipate, 8 parts of light calcium carbonate, 9 parts of sodium alginate, 5 parts of sorbitol, 7 parts of titanium dioxide, 2 parts of casein and 1 part of arabic gum. The safe PVC food preservative film further comprises 7 parts of chitosan. The safe PVC food preservative film provided by the invention has the beneficial effects of broad antibacterial spectrum, capability of inhibiting a variety of bacterial propagules and fungal spores, good oxygen permeability, long preservation period and strong temperature tolerance, is suitable for freezing preservation and microwave heating, is used as a food grade packaging material and is non-toxic and harmless.

The invention discloses a special epoxy resin potting adhesive The special epoxy resin potting adhesive for ignition coils comprises a component A and a component B in a mass ratio of 5:1. The component A comprises the following ingredients in parts by mass: 100 parts of bisphenol A epoxy resin, 0.1-0.2 part of PEO-PPO-PEO (polyoxyethylene-polypropylene oxide-polyoxyethylene) triblock copolymer, 20-25 parts of carboxy-terminated liquid nitrile-butadiene rubber, 10-20 parts of micro silicon powder, 5-10 parts of aluminum hydroxide and 5-10 parts of ethylene glycol diglycidyl ether. The component B comprises the following ingredients in parts by mass: 100 parts of liquid methyltetrahydrophthalic acid, 0.5-1 part of PEO-PPO-PEO triblock copolymer and 20-25 parts of calcium carbonate. The special epoxy resin potting adhesive has the effect of lowering water absorptivity.

The invention discloses a heat transfer printing colored tape for a metal material. The heat transfer printing colored tape comprises a tape base, an ink layer coated on one side of the tape base, and a heat resistant coating layer coated on the other side of the tape base; and the ink layer comprises the following raw materials in parts by weight: 35-38 parts of acrylic resins, 16-20 parts of epoxy resins, 31-34 parts of carnauba wax, 14-18 parts of lignite wax, 8-12 parts of tetra hydro phthalic anhydride, 17-20 parts of carbon black, 6-9 parts of sodium bentonite, 3-5 parts of montmorillonoid, 1-4 parts of aluminum phosphate, 4-6 parts of propylene glycol monomethyl ether, 1-2 parts of modified polyurea, and 1-5 parts of polydimethylsiloxane. The invention further discloses a preparation method of the heat transfer printing colored tape for the metal material. The heat transfer printing colored tape can clearly print on a metal printing medium, and widens the application range.

A method for the synthesis of substituted phthalic anhydrides (IV) wherein R' is a halogen, aromatic or aliphatic group comprising 1-18 carbons, hydrogen or nitro group is the transimidation between a substituted N-alkyl phthalimide (V) wherein R is an alkyl having from 1 to 18 carbons, and a substituted tetrahydrophthalic anhydride (VI): The by product of this reaction, a substituted N-alkyl tetrahydrophthalimide (VII), may be converted by aromatization to the substituted N-alkyl phthalimide (V).

The invention relates to an aqueous bi-component acrylic acid-polyurethane resin and a preparation method thereof. The aqueous bi-component acrylic acid-polyurethane resin comprises a component A and a component B, wherein the component A comprises n-butyl alcohol, monoethanolamine and/or n-butyl amine, hydroquinone and/or p-hydroxyanisole, glycidyl methacrylate, methyl methacrylate and/or isobornyl methacrylate, butyl acrylate and/or butyl methacrylate and/or acrylic acid laurate, hydroxyethyl acrylate, azodiisobutyronitrile, butylcellosolve and/or propylene glycol monomethyl ether, a molecular weight regulator, dimethylformamide, an acid neutralizer and water; the component B comprises butanone and/or ethyl acetate, propylene glycol methyl ether acetate, monoethanolamine and/or n-butylamine, cis-hexahydrophthalic acid glycidyl ester and/or tetrahydrophthalic acid glycidyl ester, IPDI (Isophorone Diisocyanate) and/or HDI (Hexamethylene Diisocyanate), ethylene glycol monobutyl ether and/or ethylene glycol, the acid neutralizer and the water; and the weight ratio of the component A to the component B is (4-7):1. A coating prepared from the aqueous bi-component acrylic acid-polyurethane resin is more than 150 microns in thickness and cannot generate bubbles or pinholes.

The invention relates to extinction type polyester resin for an HAA system. Terephthalic acid, tetrahydrophthalic acid, 2-amino-4,6-dihydroxypyrimidine, neopentyl glycol, 1,10-decanediol, diacetone-D-mannitol, 1,4,5,8-naphthalenetetracarboxylic dianhydride, 5-methyl isophthalic acid and trimethyl citrate are adopted as raw materials. All the components are matched with one another and have a synergistic effect so that the molecular weight distribution of the finally obtained polyester resin is not uniform and polybasic acids for end capping are different in type, and therefore, when the polyester resin with different end-capping functional groups and HAA are cured, the reaction activity difference is large, the curing process cannot be synchronously carried out, the cured coating surface shrinks, and the surface gloss is effectively low. Experimental data show that when the prepared extinction type polyester resin is used for preparing extinction type powder coating of an HAA system, acoating film with the glossiness smaller than 15% can be obtained, and excellent comprehensive performance is achieved.

The invention provides a flame-retardant heat-insulating water-based paint, and the paint is prepared from the following components: 55-65 parts by weight of a film-forming polymer, 5-10 parts by weight of surface-modified foamed aluminum-based nanotubes, 1-5 parts by weight of a cosolvent, 10-20 parts by weight of water, 1-3 parts by weight of a film-forming auxiliary agent, 1-3 parts by weight of an emulsifier, 1-3 parts by weight of a leveling agent, and 1-3 parts by weight of a wetting agent. The film-forming polymer is prepared from bis(2-aminoethyl)hydrogen phosphate, exo-3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride, 1,1-dimethoxy-3-(trimethylsiloxy)-1,3-butadiene, polyetheramine. The invention also discloses a preparation method of the flame-retardant heat-insulating water-based paint. The flame-retardant heat-insulating water-based paint prepared by the invention has the advantages of low cost, good flame-retardant and heat-insulating effects, excellent water resistance, alkali resistance, abrasion resistance, weather resistance, small environmental impact, safe and environmentally friendly use.

The invention discloses a high-temperature-resistant protective film, a preparation process thereof and an ITO conductive film, the high-temperature-resistant protective film comprises a protective film substrate layer and an adhesive layer covering the protective film substrate layer, the adhesive layer is an acrylic acid adhesive layer, wherein the adhesive layer is an acrylic acid adhesive layer doped with 2-8wt% of hexahydrophthalic acid diglycidyl ester or 2-8wt% of tetrahydrophthalic acid diglycidyl ester, and the thickness of the adhesive layer is 4-30 microns. The high-temperature-resistant protective film and an ITO conductive film using a base material of the same material have a relatively matched thermal shrinkage rate, so that the process yield can be greatly improved, the flatness of an ITO conductive film application process is ensured, and the smoothness of the ITO conductive film application process is ensured, through the ITO conductive film application process, the temperature is high, the separation or tearing difficulty of the high-temperature-resistant protective film is avoided, no residual glue is transferred to the ITO film, the product quality is ensured,the attenuation of the surface energy of the HC surface of the ITO conductive film is ensured to be small, the excellent printing performance is ensured, the process yield is high, and the product performance is better.