379results about How to "Good hue" patented technology

The invention relates to a preparation method of polybutylene terephthalate/adipate butanediol copolyester, which utilizes a titanium compound and an antimony compound as the composite catalyst, the mole ratio of terephthalic acid to adipate is 3:7-8:2, the ratio of the total mole of the terephthalic acid and the adipate to the mole of 1,4-butanediol is 1:1.0-1.8, esterification is carried out at normal pressure and the temperature of 150-220 DEG C, the pressure is reduced to high vacuum 10-150 Pa for the reaction, the final temperature for the reaction is 265-280 DEG C, and inert gas is utilized to recover the pressure to be normal to obtain the copolyester. The reaction time is shortened, the production amount of tetrahydrofuran is small, the intrinsic viscosity of copolyester chips is 0.90-1.32 dL/g, the hue b value of the product is between 0 and 8, the L value is between 68 and 85, and the product of the polybutylene terephthalate/adipate butanediol copolyester can be used in the fields of various soft package plastic products.

The ink set of the present invention provides a high ejection stability, gives an image having an excellent hue, light-resistance and waterproofness and improves the image preservability under severe conditions in ink jet recording, in which the ink set comprising a plurality of inks different in hues, wherein the plurality of inks includes a yellow ink containing a coloring agent that is a dye having: a lambdamax of from 390 nm to 470 nm; an I(lambdamax+70 nm)/I(lambdamax) ratio of not greater than 0.4, in which I(lambdamax) is the absorbance at lambdamax and I(lambdamax+70 nm) is the absorbance at (lambdamax+70 nm); and a forced fading rate constant of not greater than 5.0x10<-2 >[hour<-1>], an ink cartridge having the ink set received therein, an ink jet printer comprising the ink cartridge mounted therein and an image recording method.

A process for in-situ preparing UV-resistant polyester by use of TiO2 nanoparticles includes such steps as synthesizing the hydrolysis speed controllable glycol salt of Ti, organic stabilizing it, dispersing it in diol, and polymerizing (or copolymerizing) with polyester and other monomers. Its advantage is high UV shielding effect.

The invention discloses a preparing method of titanium-system catalyst of polyester, which is characterized by the following: reacting titanic acid ester and 2-hydroxy carboxylic compound and organic phosphonic acid compound; making the product react with at least one phosphorus compound of phosphoric acid, phosphorous acid, hypophosphorous acid, phosphate ester or phosphite ester; fitting for polyester industry.

The invention provides a method for preparing special titanium dioxide pigment for plastic sectional materials by a chlorination method, which comprises the following steps that: the chlorination method is adopted for preparing titanium dioxide primary products into slurry, and the pH value of the slurry is regulated to 4.0 to 5.0; phosphate dispersing agents are added; grinding treatment is carried out, then, grinding media is removed, and the temperature is raised; water-soluble silicate solution is added, the pH value of the slurry is maintained between 3.5 and 4.5, amorphous silicon oxide is formed, curing is carried out, and a first covering layer is formed; the pH value of the slurry is regulated to 6.0 to 7.0, curing is carried out, and a second covering layer is formed; aluminum salt solution is added, the pH value is controlled between 7.0 and 9.0, curing is carried out, a third covering layer is formed, the pH value of the slurry is regulated to 6.0 to 7.0, and curing is carried out; the slurry is washed by de-ionized water until the conductivity of filter cake is higher than 15000 ohm*cm, and then, drying and air powder treatment are carried out; modified polysiloxane is added in the air powder process, and a fourth organic covering layer is formed; and materials are recovered through a bag filter. The titanium dioxide pigment prepared by the method provided by the invention has the advantages of high weatherability, high shielding capability, high non-transparency and excellent processing performance in the field of plastic sectional materials.

A hydrogenation catalyst for preparing dicyclopentadiene hydrogenant petroleum resin by dicyclopentadiene petroleum resin. The active components of the resin are Pd and Pt. The contents of Pd and Pt are 0.1í½ 1.0wtúÑ and 0.05í½0.5wtúÑ, respectively. The carrier of the catalyst is ª†-Al2O3, the specific surface are is 150í½250m2/g, the volume is 0.5í½0.9ml/g. Hydrogenant resin prepared from dicyclopentadiene petroleum resin through the catalyst has a lowered content of unsaturated hydrocarbon bonds, and the color of the resin is improved to water-white.

The invention relates to a preparation method of hydrogenated C9 petroleum resin, which is characterized by comprising the following steps of: (1) preparation of supported noble metal hydrogenated catalyst: preparing by using a coating method, selecting noble metal palladium and platinum and transition metal cobalt or nickel as metal active components, preparing a spherical alumina supporter, then coating the active components of palladium and platinum and transition metal on the alumina supporter, and activating to obtain a hydrogenated catalyst; (2) selective hydrogenation: desulfurizing and denitrifying; (3) high pressure hydrogenation reaction: controlling the weight ratio of resin to solvent to ensure that the concentration of resin is 20-40% by weight, taking chain-like or annular saturated hydrocarbon or aromatic hydrocarbon or hydrocarbon mixture as a solvent, and taking a supported noble metal hydrogenated catalyst as a catalyst, wherein the temperature of the high pressure hydrogenation reaction is 250-350 DEG C, the pressure is 8.0-20.0 MPa and the liquid volume space velocity is 0.5-2h<-1>. The properties of the final product hydrogenated C9 petroleum resin are as follows: Gardner is not more than 1, and the softening point is not smaller than 100 DEG C.

The invention relates to a titanium catalyst, mainly aiming to solve the problems of the diol compound of the titanium as a catalyst in the former technology, which has the problems of the low solubility in the ethylene glycol and the poor polyester color difference. The invention uses the technical proposal with the reaction between the titanium compound and diol and the reaction between the product of the precious reaction and the IA metal compound in the periodic table of elements to produce the titanium catalyst to solve the problems well; the invention can be used in the industrial production of the polyester.

This invention relates to a method for producing light color C9 petroleum resin by continuous heat polymerization in multiple kettles in series. The method comprises: (1) pre-treating C9 raw materials; (2) performing heat polymerization in multiple kettles in series for 20-30 h; (3) sending the polymerization products into a primary evaporator, then sending into a secondary film-falling flash evaporator to remove the solvent, slicing, and cooling to obtain the final product. The method adopts negative pressure distillation to purify the raw materials. Heat polymerization in multiple kettles in series can effectively lower the energy consumption. Besides, secondary film-falling flash evaporator is adopted to remove the solvent, thus the solvent removal efficiency is increased and the resin appearance is improved.

The invention relates to a titanium polyester catalyst for preparing polyester, which mainly solves the problems of the low storage stability and easy color changing under illumination of a liquid-state titanium polyester catalyst and the low stability and poor hue of the prepared polyester in the conventional technology. The titanium polyester catalyst for preparing the polyester adopted in the invention comprises a reaction product prepared from the following raw materials at the reaction temperature of between 0 and 200 DEG C for 0.5 to 10 hours: (A) a titanium compound having the following general formula: Ti(OR)4, wherein R is selected from alkyl having 1 to 10 carbon atoms; (B) dihydric alcohol having 2 to 10 carbon atoms; (C) at least one metal compound of IA selected from a periodic table of elements; (D) at least one metal compound selected from IIA, IB, IIB, VIIB and VIII in the periodic table of the elements; (E) at least one aliphatic organic acid selected from organic acids; and (F) at least one phosphate compound selected from a phosphorus compound. The technical scheme solves the problems well and can be used in the industrial production of the polyester.

A polycarbonate resin composition for a thin optical component is provided, which has a high transmittance and a good hue and an excellent resistance to thermal discoloration, and a thin optical component is also provided. The polycarbonate resin composition for a thin optical component comprising, per 100 mass parts of a polycarbonate resin (A), 0.1 to 2 mass parts of a polyalkylene ether glycol compound (B) represented by general formula (1) and 0.005 to 0.5 mass parts of a phosphorus stabilizer (C).

The present invention is one technological scheme of titanium catalyst of the reaction resultant of titanium compound, diol and metal compound. The titanium catalyst of the present invention is superior to available similar catalyst, which has poor dissolubility in ethylene glycol and poor hue of the prepared polyester. The titanium catalyst is applied in industrial production of polyester.

The invention discloses a top coating for a coating layer of a double-sided coating white board as well as a preparation method and application thereof. As the top coating, the double-sided coating white board after being applied and coated by a coating machine not only is suitable for high-grade printing but also is suitable for vacuum forming. The top coating comprises the following components in parts by mass: 20 to 50 parts of kaolin, 50 to 80 parts of calcium carbonate, 10 to 18 parts of latex and 25 to 35 parts of water. The top coating also contains the components of a dispersant, a lubricant, a water repellent agent, a bactericide, a pH regulator and a functional assistant of 0.6 to 3.0 parts by mass of PC4200 soybean protein. By adding the functional assistant, the closure property of the coating layer can be opened, the covering property of the coating is enhanced, the use quantity of wood pulp is reduced, the smoothness of finished paper is lowered, and the infiltration of vacuum forming oil is benefited. The coating is applied and coated on a paperboard by the coating machine, can enable the paperboard to have favorable printing ink acceptance, improves the covering property of a paper face greatly and has lower smoothness and roughness and favorable printing adaptability.

Provided is an optical member that can achieve a liquid crystal display apparatus that is excellent in mechanical strength, has an excellent hue, and shows little change in hue dependent on a viewing angle. The optical member includes a prism sheet and an optically functional element that are integrated with each other. The prism sheet has: a first main surface, which is flat; and a second main surface, on which a plurality of unit prisms each having a columnar shape convex toward an opposite side to the first main surface are arrayed. Convex portions formed by the plurality of unit prisms on the second main surface of the prism sheet are bonded to one main surface of the optically functional element.

The invention relates to a manufacturing method of a polyester, which mainly solves the problems that dihydric alcohol compounds of titanium have poor solubility in glycol and the manufactured polyester has poor hue with the prior art. The manufacturing method takes dicarboxylic acids and alkylidene diols as raw materials, carries out an esterification reaction on conditions of a titanium-including catalyst, temperature of 230 DEG C to 280 DEG C and reaction pressure of the normal pressure to 0.5MPa to obtain a prepolymer; and then a condensation polymerization is carried out to obtain a product of polyester; the technical proposal that the product from the reaction of titanium compound, dihydroxy alcohol and at least one metallic compound selected from the IA column in the periodic table of (chemical) elements is used as the catalyst for the reaction of dicarboxylic acids and alkylidene diols can solve the problem and be used in the industrialized production of polyester.