83results about How to "Reduce yellowness" patented technology

In the invention, a polyester resin having dicarboxylic acid constitutional units and diol constitutional units wherein 5 to 60 mol % of the diol constitutional units has a cyclic acetal skeleton is produced by a process including an oligomerization step and a polymerization step. In the oligomerization step, an ester having a limited acid value is transesterified with a diol having a cyclic acetal skeleton in the presence of a titanium compound to obtain an oligomer. The oligomer is then polymerized in the subsequent polymerization step to increase the molecular weight.

Polyester compositions are disclosed that include polyester polymers or copolymers having incorporated therein titanium nitride particles that provide one or more of the following advantages: improving the reheat properties of the compositions, improving the color of the compositions through reduced yellowness, and improving the UV-blocking properties of the compositions. Processes for making such compositions are also disclosed. The titanium nitride particles may be incorporated in the polyester by melt compounding, or may be added at any stage of the polymerization, such as during the melt-phase of the polymerization. A range of particle sizes may be used, as well as a range of particle size distributions. The polyester compositions are suitable for use in packaging made from processes in which a reheat step is desirable, or decreased yellowness is desired, or increased resistance to the effects of ultraviolet light is desired, or any combination of the foregoing.

Processes for preparing high purity polycarbonates having high light transmission, low yellowness, and color stability are disclosed herein. High purity starting ingredients are used to form a polycarbonate powder. The polycarbonate powder can be subsequently melt extruded at an optimum shear rate to minimize yellowness and the need to add colorant to overcome the yellowness. The lower amount of colorant increases the light transmission of the resulting polycarbonate resin.

The invention discloses a thermus thermophilus and saccharomycetes combined fermentation method including the steps of: (1) performing one-time or multi-time fermentation to saccharomyces cerevisiae at medium temperature under acidic condition, thus reproducing the saccharomyces cerevisiae; (2) when the saccharomyces cerevisiae is in later period of logarithmic phase, increasing the temperature, inoculating the thermus thermophilus, and performing secondary fermentation under alkaline condition, thereby producing a fermentation product. By means of the method, active components in the thermusthermophilus can be significantly increased; especially, active components, which are applied to cosmetics, are increased in content or improved in activity.

Polyester compositions are disclosed that include polyester polymers or copolymers having incorporated therein titanium nitride particles that provide one or more of the following advantages: improving the reheat properties of the compositions, improving the color of the compositions through reduced yellowness, and improving the UV-blocking properties of the compositions. Processes for making such compositions are also disclosed. The titanium nitride particles may be incorporated in the polyester by melt compounding, or may be added at any stage of the polymerization, such as during the melt-phase of the polymerization. A range of particle sizes may be used, as well as a range of particle size distributions. The polyester compositions are suitable for use in packaging made from processes in which a reheat step is desirable, or decreased yellowness is desired, or increased resistance to the effects of ultraviolet light is desired, or any combination of the foregoing.

To provide a skin care composition having effects of anti-inflammation, moisturization, and whitening of skin yellowing.SOLUTION: The present invention discloses application of a fermentation product in preparing reagents for anti-inflammation, moisturization, or whitening of skin yellowing, the fermentation product is prepared from thermus thermophilus and yeast through fermentation co-culture, a thermus thermophilus and yeast co-fermentation method comprising the following steps: firstly, carrying out bacterium increase fermentation once or multiple times on yeast at low temperature under acidic condition after a logarithmic phase, increasing the temperature of a fermentation liquid to a high temperature from a low temperature, adding thermus thermophilus, and carrying out secondary fermentation under alkaline condition. The method includes the steps of: (1) performing one-time or multi-time fermentation to saccharomyces cerevisiae at low temperature under acidic condition, thus reproducing the yeast; and (2) when the yeast is in a later period of a logarithmic phase, increasing the temperature, inoculating the thermus thermophilus, and performing second fermentation under alkaline condition, thereby producing a fermentation product.SELECTED DRAWING: Figure 1

To provide a technology whereby a hardly colored molded article for medical use can be manufactured at a low cost. A molded article for medical use that is manufactured by extrusion molding a composition, said composition comprising, per 100 parts by mass of a polyvinyl chloride resin, 30-160 parts by mass of an ester plasticizer, 5-25 parts by mass of an epoxy plasticizer, and 0.01-0.1 part by mass (in total) of a zinc soap and calcium soap, wherein the white index (W.I.) of the molded article for medical use is 25 or more and the yellow index (Y.I.) thereof is 3.5 or less. In the extrusion molding of the molded article for medical use, a composition 11 in a solid state is supplied to a screw 21 of an extruder 20, said extruder being provided with grooves 22 having the same depth d, at a rate that is regulated so as to prevent shear heat generation in the composition within the extruder. Next, the solid composition supplied to the screw is heat-melted by heaters 41, 42 and 43 and the melted composition extruded from the extruder is molded into the shape of the molded article 12 for medical use in a die 50.

The invention discloses a method for reducing yellowness of a silver nanowire transparent conductive film through changing plasma resonance intensity. Water / alcohol soluble phenol is added in the conductive ink so as to be combined with the surface PVP of the silver nanowire by forming hydrogen bonds to suppress silver nanowire surface plasma resonance, and thus the yellowness value of the conductive film can be reduced. The protective layer containing the phenolic compound can also be further arranged on the conductive layer to form the hydrogen bonds with the remaining PVP on the surface ofthe silver nanowire so as to further reduce the yellowness value. With application of the method, the b* value of the obtained conductive film is reduced to 0.8 so that the problem of high yellownessvalue of the conductive film can be completely solved, and display has no chromatic aberration if the conductive film is manufactured into the display screen.

Disclosed are an alkyl(meth)acrylate-based thermoplastic resin composition and a thermoplastic resin with modified scratch resistance and yellowness. The alkyl(meth)acrylate-based thermoplastic resin composition provides improved scratch resistance and low yellowness index while maintaining transparency, flowability, and impact strength, even when the total content of the vinyl cyan-based monomer contained in the resin composition is reduced to a level unattainable by conventional techniques, and the content of the alkyl(meth)acrylate-based monomer is increased.

A polyvinyl acetal film as an intermediate film for a laminated glass, can provide a laminated glass that exhibits a low degree of yellowness and excellent surface appearance, and is useful as a sealing material or intermediate film that can prolong the life of a laminated glass provided with a solar cell or functional unit. The content of corrosion-causing substance in the polyvinyl acetal film is low, so that the polyvinyl acetal film permits high-temperature lamination and ensures excellent productivity. A solar cell module and a laminated glass are prepared using the polyvinyl acetal film. A plasticized polyvinyl acetal film which comprises 15 to 60 parts by mass of a plasticizer having a total number of 28 or more of carbon atoms and oxygen atoms constituting a molecule based on 100 parts by mass of a polyvinyl acetal resin, and which has an acid value of 5.0 meq / kg or less.

An acrylate-based optical coating composition containing a blend of monomers, a metal salt, a Hindered Amine Light Stabilizer (HALS), an antioxidant (AO), an initiator and a photochromic dye. The initiator has a range of free radical energy that is below a predetermined level. The cure process is controlled by the catalyst and initiator in combination with the HALS and AO to avoid deleterious reactions that can increase yellowness. The composition is well suited to be applied to a lens and cured in the mold to form a coating with reduced yellowness having high adhesion and abrasion-resistant properties. A photochromic segmented bifocal lens is produced with low photochromic fatigue and favorable % T values.

Described as one aspect of the invention are polyester compositions comprising at least one polyester which comprises:(a) a dicarboxylic acid component comprising:(i) about 90 to about 100 mole % of terephthalic acid residues;(ii) about 0 to about 10 mole % of aromatic and / or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and(b) a glycol component comprising:(i) about 30 to about 42 mole % 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and(ii) about 58 to about 70 mole % ethylene glycol residues;wherein the total mole % of the dicarboxylic acid component is 100 mole %, andwherein the total mole % of the glycol component is 100 mole %;wherein the inherent viscosity of the polyester is from 0.50 to 0.70 dL / g as determined in 60 / 40 (wt / wt) phenol / tetrachloroethane at a concentration of 0.25 g / 50 ml at 25° C.; and wherein the L* color values for the polyester is 90 or greater. The polyesters may be manufactured into articles.

The invention provides a photosensitive polyimide resin composition, which comprises (a) photosensitive polyimide represented by a formula (1); (b) a filling agent, which is one or more of alumina, graphene, inorganic clay, silicon oxide, and zinc oxide and has a diameter of 10 nanometers to 1.0 micrometer; (c) a photo free radical initiator; (d) a free radical polymeric compound; and (e) a solvent, which is used to dissolve the photosensitive polyimide, wherein X is originated from tetracarboxylic dianhydride, Y is originated from diamine, and m is a positive integer selected from 1 to 5000.