820 results about "Dimer acid" patented technology

The invention discloses a bridge heat fixed epoxy tar material and preparing method, which consists of A and B, wherein A part quality component is 60-76 modified tar with carboxy group or acid anhydride, grease group diacid, 11-25 dimer acid or alkyd resin, 10-25 fatty acid and 0.05-0.65 solidifying celeratist; B is epoxy resin; the quality rate of A and B is 2:1-8:1. The invention possesses high strength and good flexibility, which is fit for higher occasion.

The invention discloses a deepwater constant-rheology oil base drilling fluid applicable for deep sea drilling. The deepwater constant-rheology oil base drilling fluid applicable for deep sea drilling comprises the following components in parts by weight: 70-100 parts of white oil, 0-30 parts of a calcium chloride aqueous solution, 1.5-5 parts of a fluid type conditioning agent, 1-4 parts of an emulsifying agent, 0.5-2.5 parts of a wetting agent, 1-3.5 parts of organic soil used for drilling fluid, 1.5-5 parts of a filtrate reducer, 0.2-0.6 parts of calcium oxide and 0-260 parts of a weighting agent. The fluid type conditioning agent is at least one of ethylene-propylene copolymer, polymethacrylate, trimeric acid, phenolic resin, copolymer generated from reaction of dimer acid, cholamine and polyethylene polyamine and copolymer generated from reaction of acrylamide, styrene and methacrylic acid. The movable shearing force and six-speed viscometer of the oil base drilling fluid is respectively less than 6 r/min and 3 r/min, and the 10-min static shearing force can be kept steady within 4-65 DEG C; constant eheology is realized in the temperature range of the barrel of the deepwater drilling, technical demands on sea deepwater drilling can be satisfied, requirements on base oil raw material are loose, and the cost is low.

The invention discloses a transparent copolyamide and a preparation method thereof. The cheap domestic dimer acid, aromatic dibasic acid and aliphatic linear chain diamine are taken as raw materials to undergo melt polycondensation and obtain the copolyamide. The light transmittance of the copolymer is up to more than 90%, and the copolymer has high heat resistance and good forming and processing performance. By taking the dimer acid, the aromatic dibasic acid and the aliphatic linear chain diamine as the raw materials, compared with the existing salt forming method, the method for forming salt in aqueous solution greatly reduces the production cost, simplifies the production process and shortens the operation period. The transparent copolyamide is a polymer which has high molecular weight and is prepared by taking the dibasic acid and the aliphatic linear chain diamine as the raw materials, forming salt and polymerizing in the aqueous solution, and the intrinsic viscosity of the transparent copolyamide is up to 2.1dL.g<-1>.

The present invention provides a polyester, a polyester composition and a pressure-sensitive adhesive composition capable of obtaining a pressure-sensitive adhesive which is global-environmentally friendly and is excellent in pressure-sensitive adhesion properties, using a plant-derived raw material; and a pressure-sensitive adhesive layer and a pressure-sensitive adhesive sheet which can be obtained by using the same. A polyester of the present invention is a polyester comprising at least a lactic acid unit, a dibasic acid unit and a glycol unit, wherein the dibasic acid unit contains dimer acid, and the polyester has a glass transition temperature as measured at a temperature rising rate of 20° C./minute using a differential scanning calorimeter, of −70 to −20° C., a weight average molecular weight of 20,000 to 300,000 and a hydroxyl value of 1 to 100 mgKOH/g.

The invention discloses a high-performance thermosetting epoxy asphalt material with wide temperature field and a preparation method thereof. The high-performance thermosetting epoxy asphalt material consists of a part A and a part B, wherein the part A comprises the following components in part by mass: 30 to 76 parts of modified asphalt with carboxyl or acid anhydride, 2 to 20 parts of monohydric alcohol or polyol or benzene ring plasticizer, 11 to 25 parts of aliphatic diacid, dimer acid or alkyd, 10 to 25 parts of fatty acid anhydride and 0.05 to 0.65 part of curing accelerator; and the part B is epoxy resin. The mass ratio of the part A to the part B is 2.2: 1-10: 1. The high-performance thermosetting epoxy asphalt material has the advantages of high strength, good flexibility, prominent high and low temperature performance, excellent fatigue resistance and environment friendliness, is applicable to the places with higher requirements such as expressways, roads and bridges and the like under various temperature conditions, and can be used as a road and bridge surfacing material, a waterproof roof material, a sealing agent and an advanced elastic damping de-noising material for the expressways.

The invention discloses bio-based biodegradable multi-block copolymer as well as a preparation method and application thereof. The multi-block copolymer comprises a chain segment A and a chain segmentB; the chain segment A is fat-aromatic coplyester with number average molecular weight of 3000 to 100000, which is obtained by performing esterification (ester exchange) on C2-C36 fatty diacid and derivatives thereof, C6-C20 aromatic diacid and derivatives thereof, C2-C36 divalent alcohol, and 0.0 to 10% by weight of polyhydroxyl or polycarboxyl compound and performing condensation polymerization; the chain segment B is fatty copolyester with number average molecular weight of 3000 to 100000, which is obtained by performing esterification (ester exchange) on dimer acid and derivatives thereof, C2-C12 fatty diacid and derivatives thereof, C2-C36 divalent alcohol as well as 0.0 to 10% of polyhydroxyl or polycarboxyl compound and performing condensation polymerization. The chain segment A and the chain segment B react with a polyfunctional chain extender of polyisocyanate, a polyepoxy compound and carbodiimide which is 0.01 to 10% of the polymer to form the multi-block copolymer. The product prepared by the method has high biodegradability, mechanical property and processing property, and can be widely applied to the fields of packaging, biological medicine, medical treatment and thelike.

The invention belongs to the field of electronic welding materials, and discloses washing chip solid crystal solder paste and a preparing method thereof. The solid crystal solder paste comprises, by weight percent, 82%-88% of metal alloy powder and 12%-18% of washing flux paste. The metal alloy powder is one of Sn96.5Ag3Cu0.5, Sn89.5Sb10Ni0.5 and SnPb92.5Ag2.5. The solid crystal solder paste comprises, by weight percent, 8%-12% of rosin resin, 40%-50% of a solvent, 5%-15% of an activating agent, 4%-12% of polymine, 4%-8% of dimer acid and 10%-15% of a surface active agent. By means of the solid crystal solder paste, the packaging yield and reliability of high-precision LED flip chips can be obviously improved, by means of the washing technology, active residues are avoided, welding spots are full and bright, the void content and heat resistance are low, and electric conductivity is high.

The invention discloses a waste rubber powder modified epoxy asphalt material and a preparation method thereof. The epoxy asphalt material consists of two components A and B, wherein the component A consists of 90 to 120 mass parts of modified asphalt with carboxyl or acid anhydride group, 5 to 10 mass parts of aliphatic dibasic acid, dimer acid or alcohol acid resin, 0.1 to 5 mass parts of aliphatic acid anhydride and 5 to 15 mass parts of waste rubber powder; and the component B is epoxy resin. The mass ratio of the component A to the component B is (8-13): 1. The material has good high and low-temperature mechanical property. The epoxy asphalt is modified by adding the waste rubber, so that the low-temperature performance of the epoxy asphalt is improved, and the production cost of the epoxy asphalt is reduced; and waste tyres are utilized, so that environmental pollution is reduced. The material can be used as a renewal and replacement material for paving roads and bridges, and is suitable for occasions of expressways, cement viaducts, urban trunks and the like.

The invention relates to a low-viscosity dimer acid type polyamine hot melt adhesive and a preparation method thereof. The hot melt adhesive consists of the following raw materials in percentage by mole: 55 to 95 percent of dimer acid, 5 to 45 percent of aliphatic dibasic acid, 60 to 95 percent of aliphatic diamine, 5 to 40 percent of polyoxypropylene polyamine, 0.1 to 5 percent of molecular weight regulator, and the balance of water and antioxidant, wherein the dosage of the water accounts for 1 to 30 percent of the total mass of the acide and the amine; and the dosage of the antioxidant accounts for 0.1 to 2 percent of total mass of the acid and the amine. The preparation method comprises the following steps: salifying in the protection of nitrogen by using the dimer acid, the aliphatic dibasic acid and the diamine, the antioxidant and the molecular weight regulator as raw materials and introducing proper water at early stage; and heating and polycondensating. The polyamine hot melt adhesive has high and low temperature resistance, low high-temperature viscosity and simple molding process, and is mainly applied in automobile and electronic industries.

A polyacetal resin composition comprises a polyacetal resin, and at least one carboxylic acid hydrazide selected from a saturated or unsaturated long-chain aliphatic carboxylic acid hydrazide, a saturated or unsaturated alicyclic carboxylic acid hydrazide, a dimer acid or trimer acid hydrazide, and an oxycarboxylic acid hydrazide corresponding to each of these hydrazides. The proportion of the carboxylic acid hydrazide may be about 0.001 to 20 parts by weight relative to 100 parts by weight of the polyacetal resin. The polyacetal resin composition may further comprise at least one member selected from an antioxidant, a heat stabilizer, a processing stabilizer, a weather (light)-resistant stabilizer, an impact resistance improver, a slip-improving agent, a coloring agent, and a filler. With the use of such a resin composition, stability of a polyacetal resin is improved, and formaldehyde emission is inhibited.

The present invention is directed to a series of polyester compounds made from the reaction of (a) a difunctional hydroxy compound, specifically polyoxyalkylene glycols, (b) a difunctional carboxylic acid, specifically dimer acid and hydrogenated dimer acid, and (c) a capping carboxylic acid, which only contains one acid group. These compounds are very well suited to the preparation of products for the personal care market.

The invention provides a preparation method of a dimer acid modified epoxy resin toughened carbon fiber prepreg, which comprises the following steps: by taking a component of which the molecular structure is similar to that of a carbon fiber sizing agent as toughener, preparing a dimer acid modified epoxy resin through a pre-reaction method; adding reactants into the mixed epoxy resin, adding a latent curing agent, and evenly mixing to obtain a resin system for the prepreg; and coating the resin system through a film coating machine, and then compounding with carbon fibers or a fabric made therefrom to prepare the moderate-temperature curing prepreg having fine operability and adhesivity. Compared with the traditional rubber toughened prepreg, the invention can enhance the wettability of the resin system on carbon fibers, reduce the moisture permeability of the prepreg and simultaneously improve the toughness and impact resistance of the composite material, thus being suitable for manufacturing of a prepreg for winding formation.

The invention discloses a method for synthesizing a dimer acid type polyamide hot melt adhesive. The polyamide hot melt adhesive is prepared by adding a catalyst, an aqueous solution of alcohol and an aid into monomers of dimer acid, aliphatic dicarboxylic acid and aliphatic diamine which are taken as reaction raw materials and performing condensation reaction. The method is easy to operate, the loss of amine in the reaction process is low, and the chemical equivalent can be controlled easily, so that the reaction is more complete, and finally a product with stable high molecular weight can be obtained; meanwhile, the deviation among different batches of products can also be improved, so that the product can be stably produced.

The present invention provides polymerizable dental compositions comprising a dimer acid-derived monomer such as a dimer acid-derived di(meth)acrylate monomer. In one embodiment, the dimer acid-derived monomer is of the formula (I): wherein R₁, R₂, R₃, R₄, R₅ and R₆ are independently selected from H and optionally substituted C₁-C₂₅ straight-chained or branched aliphatic, optionally containing 1 or more double or triple bonds, wherein one or more carbons are optionally replaced by R* wherein R* is —C(O)—, —C(O)C(O)—, —C(O)NR⁷—, —C(O)NR⁷NR⁸—, —C(O)O—, —OC(O)—, —NR⁷CO₂—, —O—, —NR⁷C(O)NR⁸—, —OC(O)NR⁷—, —NR⁷NR⁸—, —NR⁷C(O)—, —NR⁷C(O)O—, —S—, —SO—, —SO₂—, —NR⁷—, —SO₂NR⁷— or —NR⁷SO₂—, where R⁷ and R⁸ are independently selected from H and optionally substituted aliphatic, cycloalkyl, heterocycloalkyl, aryl or heteroaryl; provided that at least two of R₁, R₂, R₃, R₄, R₅ and R₆ are substituted C_1-25 straight-chained or branched aliphatic wherein at least one carbon is replaced by R* and at least one of the substituents is an alkenyl group.

The invention discloses a preparation method of a papermaking wet strength agent. The preparation method comprises the following steps: (1) carrying out polymerization reaction on polyamine, adipate, dimer acid and a catalyst under a heating condition, so as to obtain a polyamide polyamine prepolymer water solution; and (2) adding water, a cationic etherifying agent and epoxy chloropropane into the prepolymer water solution to react at the room temperature, heating to react, and finally adding acid to regulate the pH value, so as to obtain the papermaking wet strength agent with the solid content of 15%-35%. The papermaking wet strength agent has the advantages that the polymerization process is mild, stable and controllable, the gelling of the product caused by overreaction is basically avoided, and the solid content is relatively high; the reaction of monomers is complete; and the product is high in polymerization degree, good in adhesive property, good in quality effect, relatively low in curing temperature, easy to cure, and good in water resistance.

The invention provides a normal temperature solidified thermosetting epoxy bitumen material. The normal temperature solidified thermosetting epoxy bitumen material consists of a part A and a part B and is obtained by respectively evenly mixing the part A and the part B, then evenly mixing the part A with the part B and subsequently solidifying at the temperature of 0-60 DEG C, wherein the part A comprises the following components in parts by mass, 25-80 parts of dimer acidic diglycidyl ester and 20-50 parts of epoxy diluting agent; and the part B comprises the following components in parts by mass: 50-300 parts of bitumen and 28-100 parts of organic amine solidifying agent. According to the invention, the part A and the part B are respectively evenly stirred through a colloid mill and then blended and evenly stirred at normal temperature, and finally the mixture is solidified for 1-12 hours at the normal temperature, so as to obtain the thermosetting epoxy bitumen material; the bitumen material can be rapidly solidified at the normal temperature to form a high-strength high-flexibility thermosetting material in no need of complex construction equipment, thus work efficiency is improved, the volatilization of harmful substances in the bitumen is reduced, and the bitumen material provided by the invention is energy-saving and environment-friendly.

The invention discloses stereoscopic offset printing ink prepared by using waste vegetable oil foots. The stereoscopic offset printing ink is prepared from the following raw materials: linolin, fatty acid methyl ester, a rosin modified phenolic resin, a dimer acid polyamide resin, a modified alkyd resin, aluminum gel, pigments, fillers and wax powder. The method for preparing the printing ink comprises the following steps: (1) weighing the linolin, rosin modified phenolic resin, dimer acid polyamide resin, modified alkyd resin and fatty acid methyl ester, raising the temperature until the resins are dissolved, raising the temperature again, and preserving the heat, thereby obtaining a resin linkage material; and (2) adding the pigments, fillers and aluminum gel, uniformly dispersing, grinding, adding the wax powder, and uniformly dispersing. The waste vegetable oil foots are taken as raw materials, the fatty acid methyl ester, is prepared, the wastes are changed into valuable materials, and the waste vegetable oil foots serve as solvents, so that the problems of plant oil base printing ink are solved. Meanwhile, an alkyd resin is synthesized by taking the waste vegetable oil foots as raw materials, the formula is adjusted, the drying speed of the printing ink is controlled, and the printing ink can be used for paper printing and film printing.

Polyester polyols made from thermoplastic polyesters are disclosed. The polyols can be made by heating a thermoplastic polyester such as virgin PET, recycled PET, or mixtures thereof, with a glycol to give a digested intermediate, which is then condensed with a dimer fatty acid to give the polyol. The invention includes a polyester polyol comprising recurring units of a glycol-digested thermoplastic polyester and a dimer fatty acid. The polyester polyol can also be made in a single step by reacting the thermoplastic polyester, glycol, and dimer acid under conditions effective to produce the polyol. High-recycle-content polyols having desirable properties and attributes for formulating polyurethane products, including aqueous polyurethane dispersions, can be made. The polyols provide a sustainable alternative to bio- or petrochemical-based polyols.

The invention relates to a method for producing low-phosphorous dimer acid and provides a method for producing dimer acid with low phosphor content. The method is characterized in that oleic acid is polymerized by catalysts of carclazyte, phosphoric acid and the like to obtain crude polymerized acid; the crude polymerized acid is washed by water; a centrifugal separation device is used for separating the polymerized acid from the water continuously to remove excessive phosphate and other filtered solid impurity to obtain low-phosphorous polymerized acid. The washing condition is as follows: the proportion of the polymerized acid and water (W/W) is 1: 0.1-10; the washing temperature is 10 DEG C to 100 DEG C; and the washing time is 0.1h to 3h. Molecular distillation is carried out on the low-phosphorous polymerized acid to obtain the low-phosphorous dimer acid and a side product of monomer acid. The invention increases the working procedures of washing and separating, thereby ensuring that the content of the phosphate of the dimer acid is reduced to be lower than 30mu g/g, reducing the content of the impurity in the dimer acid and improving the quality of the dimer acid and the downstream product.

The invention discloses a normal temperature water-based non-phosphorus rust-proof cleaning agent for heavy oil. The rust-proof cleaning agent comprises an anionic surfactant, a nonionic surfactant and auxiliaries, wherein the mass ratio of the anionic surfactant to the nonionic surfactant to the auxiliaries is (1.5-4): (1.5-4): 1. The cleaning agent comprises the following components in parts by weight: 5 parts of sulfonated fatty acid ester, 6 parts of AEO (alcohol ethoxylate), 2 parts of JFC, 2 parts of sodium carbonate, 2 parts of sodium metasilicate pentahydrate, 2 parts of EDTA (ethylene diamine tetraacetic acid) disodium and 3 parts of dimer acid-modified water-based acrylate. The cleaning agent disclosed by the invention has a relatively high natural degradation effect and overcomes the defect that common cleaning agent has the cleaning function only at a medium temperature or relatively high temperature and the cleaning agent disclosed by the invention has a relatively high cleaning effect at normal temperature. In addition, the cleaning agent disclosed by the invention further overcomes the defect that the existing cleaning agent is poor in anti-rust performance.