41 results about "5-sulfoisophthalic acid" patented technology

The invention relates to a polyester chip modified by the blend with side chain aliphatic diol and a preparation method thereof. The polyester chip is copolymerized by the following monomers: (1) terephthalic acid; (2) ethylene glycol; (3) sodium or potassium 5-sulfoisophthalic acid dibasic ester; and (4) the blend of 2-methyl-1,3-propanediol and 2,2-dimethyl-1,3-propanediol. The preparation method comprises the following steps: adding terephthalic acid and ethylene glycol in a first esterification kettle, adding catalyst and stabilizer simultaneously to perform esterification reaction, transferring the material to a second esterification kettle, injecting the blend of 2-methyl-1,3-propanediol and 2,2-dimethyl-1,3-propanediol to perform esterification with sodium or potassium 5-sulfoisophthalic acid dibasic ester; and (2) transferring the material to a polycondensation kettle, discharging, pelletizing and drying. The modified polyester chip of the invention is used to prepare the cationic or disperse dye atmospheric deep dyeing copolyester fiber; and the method is simple, has low cost and is suitable for industrial production.

The present invention comprises a blend of polyester and a partially aromatic polyamide with an ionic compatibilizer and a cobalt salt. This blend can be processed into a container that has both active and passive oxygen barrier and carbon dioxide barrier properties at an improved color and clarity than containers known in the art. The partially aromatic polyamide is preferably meta-xylylene adipamide. The ionic compatibilizer is preferably 5-sodiumsulfoisophthalic acid or 5-zincsulfoisophthalic acid, or their dialkyl esters such as the dimethyl ester (SIM) and glycol ester (SIPEG). The cobalt salt is selected form the class of cobalt acetate, cobalt carbonate, cobalt chloride, cobalt hydroxide, cobalt naphthenate, cobalt oleate, cobalt linoleate, cobalt octoate, cobalt stearate, cobalt nitrate, cobalt phosphate, cobalt sulfate, cobalt (ethylene glycolate), or mixtures of two or more of these. The partially aromatic polyamide is present in a range from about 1 to about 10 wt. % of said composition. The ionic compatibilizer is present in a range from about 0.1 to about 2.0 mol-% of said composition. The cobalt salt is present in a range from about 20 to about 500 ppm of said composition.

The invention relates to the field of polyester synthesis and discloses an antimony catalyst-free alkali-soluble copolyester continuously polymerizing method. The antimony catalyst-free alkali-solublecopolyester continuously polymerizing method is applied to continuous polymerization of raw materials of terephthalic acid, ethylene glycol, alkali metal 5-sulfoisophthalate and polyalkylene glycol with existence of titanium-containing catalysts and stabilizer. The antimony catalyst-free alkali-soluble copolyester continuously polymerizing method involves no antinomy catalyst adding during preparation of alkali-soluble copolyester, thereby solving the technical problem of antimony pollution and being more environmentally friendly; meanwhile, for solving the technical problem of short application cycle of a spinning module during chip spinning of existing alkali-soluble copolyesters, the antimony catalyst-free alkali-soluble copolyester continuously polymerizing method introduces the copolymerization components of bishydroxyethyl isophthalate-5-sulfoisophthalic acid alkali metal salt to a pulping process to achieve dilution effects and reduce auto-polymerization and etherification, thereby being good in spinnability and effectively prolong the application cycle of the spinning module.

The claimed invention meets these and other objects by providing a method of preparing a metal salt of a dialkyl ester of 5-sulfoisophthalic acid. Broadly speaking, the method provides for the contacting of a dialkyl ester of 5-sulfoisophthalic acid with a metal cation in a buffered reaction mixture to form the metal salt of the dialkyl ester. The reaction mixture is buffered, at least in part, by the acetate of the metal cation. The method according to invention also encompasses various methods of preparing the dialkyl ester of 5-sulfoisophthalic acid.

The invention discloses synthesis and application of a solid acid catalyst and particularly relates to a solid acid catalyst for preparation of sodium isophthalate diethylene glycol 5-sulfonate via direct esterification and preparation and application of the solid acid catalyst; the solid acid catalyst comprises an inorganic lamellar structure material and an intercalation element; the inorganic lamellar structure material may be one or any of montmorillonite, mica, purified bentonite, kaolin, graphite, hydrotalcite and a tetravalent metallic insoluble salt; and the intercalation element may be one or any of Ti, O, H and C. The solid acid catalyst has high catalytic activity in the production of sodium isophthalate diethylene glycol 5-sulfonate from 5-sulfoisophthalic acid monosodium salt and diethylene glycol via direct esterification, the catalyst is easy to separate from the product after reaction, and the catalyst is reusable after being activated.

The invention provides a method for increasing yield of 5-sulfoisophthalic acid for synthesis of a ternary monomer. The method comprises the following steps: feeding, filling nitrogen, performing a first-stage heating reaction, performing a second-stage heating reaction, adding remaining oleum, performing a third-stage heating reaction, and performing a negative pressure reaction. The method has the beneficial effects that the reaction time is shortened, and the reaction temperature is lowered; compared with the existing production process, the maximum reaction temperature is lowered by 30 DEGC, and the sulfonation reaction cycle is shortened by 2 hours; the loss of sulfur trioxide is reduced, the cost is reduced, and the economic benefits of the ternary monomer product can be increased;the amount of oleum is reduced, which is 5% less than that in the current process dosage, and the amount of alkali used in the subsequent neutralization process can be reduced by more than 5%, at thesame time, the reaction time of the neutralization process is shortened, the amount of cooling water is reduced, and the energy saving effect is remarkable; and the yield of 5-sulfoisophthalic acid isincreased.

This invention relates to methods for the production of sodium, potassium, rubidium, cesium, magnesium, manganese, cobalt, nickel, aluminum, copper (II) and zinc salts of 5-sulfoisophthalic acid. In addition, this disclosure describes new compositions of matter, specifically, the rubidium, manganese, cobalt, nickel, and copper (II) salts of 5-sulfoisophthalic acid. The method utilizes the addition of metals salts to a crude sulfonation solution of 5-sulfoisophthalic acid.

The invention discloses a delustering color master batch based on polytrimethylene terephthalate. The delustering color master batch comprises the following ingredients, by weight, 15%-40% of PTT, 20%-40% of titanium dioxide, 10%-30% of delustering agents, 5%-15% of light stabilizing agents, 5%-10% of fluorescent brighting agents, 8%-15% of 5-sulfoisophthalic acid monosodium salt, 3%-8% of compatilizer and 0.5%-3% of dispersants. The delustering agents are crosslinking butadiene-acrylonitrile polymers or crosslinking styrene-acrylonitrile polymers. The compatilizer is polymethyl methacrylate grafting maleic anhydride. The beneficial effects are that when the delustering color master batch is applied in PTT production, good low-gloss matte modification effects are achieved, the appearance is good, usage is convenient, the cost is low, the processability is good, the preparation technology is simple, and the delustering color master batch is helpful for cleaning production and raising the production efficiency.

The present invention relates to a sulfo-modified copolyester blend composition and polyglycolic acid. The blend of sulfo-modified copolyester and polyglycolic acid can be used to prepare containers with good transparency and high gas barrier properties. The preferred sulfo-modified copolyester composition comprises terephthalic acid, isophthalic acid and 5-sulfoisophthalic acid. A method of preparing a blend of sulfo-modified copolyester and polyglycolic acid is disclosed, as well as master batch processes. The present invention also relates to a method of making a container wherein the sulfo-modified copolyester is blended with the polyglycolic acid at an injection molding machine used to make preforms, which are then blown into bottles.

There is disclosed a process for making a mono-lithium salt of 5-sulfoisophthalic acid (LiSIPA) having less than 200 ppm sulfate. The process uses a reaction mixture of acetic acid, water, a lithium cation producing compound, and 5-sulfoisophthalic acid. The reaction mixture is heated to reflux, cooled, filtered and washed to obtain a high quality LiSIPA having less than 200 ppm sulfate. Also disclosed is a high quality mono-lithium salt of 5-sulfoisophthalic acid having less than 200 ppm sulfate.

The invention relates to a preparation method of a second-order nonlinear optical crystal material. The preparation method comprises the following steps: NiSO4.6H2O, 4,4'-bipyridine and 5-sulfoisophthalic acid monosodium salt are dissolved in water; the materials are stirred for 2 h, packaged in a 25-mL reaction kettle and heated at 120 DEG C for 36 h; the materials are cooled to the room temperature until blue crystals are generated. An MOF (metal-organic framework) compound in the method is different from other second-order nonlinear optical MOF compounds, and is the MOF compound adopting an acentric structure and obtained by synthesizing ligands with a symmetrical structure and metal ions. The second-order nonlinear optical property of the MOF compound is 0.8 times that of urea, and the MOF compound further has phase matching property, fluorescence emission property and magnetic property. The fluorescence emission peak of the compound is at 416 nm, and red shift occurs compared with the ligands. Lone pair electrons are converted into antiferromagnetic coupling at 28 K.

The invention discloses water-based polyester resin for an amino baking coating. The water-based polyester resin is prepared from the following raw materials in parts by weight: neopentyl glycol, diethylene glycol, trimethylolpropane, glycidyl tertiary carbonate, 1,4-cyclohexane dicarboxylic acid, phthalic anhydride, hexahydrophthalic anhydride, isophthalic acid, 5-sulfoisophthalic acid monosodiumsalt, 1,4-butanediol-2-sodium sulfonate, xylene, a catalyst, a neutralizer, a cosolvent, a solvent and deionized water. The invention further discloses a synthesis device for the water-based polyester resin for the amino baking coating. The monomer of the water-based polyester resin for the amino baking coating prepared by the preparation method has good performance, and performance of the aminobaking coating prepared from the water-based polyester resin provided by the invention is superior to performance of amino baking coatings prepared from common water-based polyester resin in the market. According to the synthesis method for the water-based polyester resin for the amino baking coating, heating rods and a spiral heating pipe can be simultaneously used for heating from inside and outside, heating efficiency is improved, and production efficiency of the whole water-based polyester resin is improved.

The invention discloses a water-soluble polyester suitable for polyester filament-fabric soft coating. The water-soluble polyester is characterized by consisting of the following raw materials in percentage by mass: 40-45% of aliphatic binary acid, 10% of aromatic binary acid, 15% of 5-sulfoisophthalic acid monosodium salt; 5% of tri-functional binary acid and 25% of dihydric alcohol. Compared with the prior art, the water-soluble polyester has the advantages that the water-soluble polyester has extremely high adhesive force with dacron, the water resistance can meet use requirements, synthetic monomers are wide, and the hand feeling is easy to control. The water-soluble polyester provided by the invention can be used for replacing solvent-based polyurethane filament-fabric soft coatings which is used in a large scale at present. According to statistics, China is the biggest spinning power in the world, and the required amount of polyester filament-fabric soft coating glue is one hundred thousand tons to one hundred and fifty thousand tons. Therefore, popularization of the water-soluble polyester provided by the invention has a very considerable economic benefit and profound environmental protection significance.