130 results about "Hydroxyl value" patented technology

The invention belongs to the technical field of preparation and surface protection of polyurethane coatings, and particularly relates to weather-resistant polyurethane and a preparation method thereof. The coating provided by the invention is composed of a component A and a component B according to a weight ratio of 1: (0.2-0.4). The component A is prepared from water-based fluorine-containing hydroxy acrylic dispersion resin with a high hydroxyl value, GMA (glycidyl methacrylate) grafted modified water-based acrylic dispersion resin, a benzotriazole ultraviolet light absorber, a light hindered amine stabilizer, rutile titanium dioxide, wet sericite powder, nano zinc oxide and auxiliaries; and the component B comprises an aliphatic isocyanate curing agent and propylene glycol diacetate. By constructing a quadruple synergistic weather-resistant mechanism of ultraviolet absorption, free radical capture, physical shielding and structural densification, the weather resistance and corrosion resistance of the coating are remarkably improved while the coating keeps excellent adhesive force (0-1 level) and hardness (2H-3H), the color change delta E is smaller than or equal to 1.8 after artificial accelerated aging for 1000 hours, the gloss loss rate is smaller than or equal to 23%, and the weather resistance and corrosion resistance of the coating are greatly improved. And the corrosion spreading width of a 600-hour salt spray test lineation is less than or equal to 2.3 mm.

A polishing liquid containing: abrasive grains; an additive; and water, in which the additive includes (A1) a polyglycerol having a weight average molecular weight of 350 to 2800 and (B) a compound having two or more nitrogen atoms to which a hydroxyalkyl group is bonded. A polishing liquid containing: abrasive grains; an additive; and water, in which the additive includes (A2) a polyglycerol having a hydroxyl value of 800 to 1000 mgKOH / g and (B) a compound having two or more nitrogen atoms to which a hydroxyalkyl group is bonded.

The invention relates to a composite catalyst as well as a preparation method and application thereof, and mainly solves the problems of high temperature, more byproducts, catalyst residues, equipment corrosion, low catalytic efficiency of a novel catalyst and the like when a traditional strong acid catalyst system is used in the prior art. The research method comprises the following steps: preparing a sulfonic acid alkyl imidazole compound catalyst by a two-step method; 1 wt% of the catalyst is used for carrying out esterification reaction on polyhydric alcohol and fatty acid; after the reaction is finished, a product is separated from the catalyst, and the ionic liquid is recycled; and carrying out weak base washing, filtering and water washing refining on the product. The catalytic efficiency of the catalyst reaches up to 99.5% or above, the product hydroxyl value is smaller than 5 mgKOH / g, the acid value is smaller than 0.5 mgKOH / g, and the esterification efficiency is still kept to be 99.0% or above after the catalyst is recycled 6 times. The method has the advantages of simple process, mild reaction conditions and recyclable catalyst, well solves the problems of high temperature, catalyst residue, many byproducts and equipment corrosion in the traditional catalytic esterification system, and can be used in the preparation process of various ester products.

The present application relates to a kind of core-shell type water-based hydroxyl acrylate microspheres emulsion and its preparation method and application. Core-shell water-based monodisperse acrylate emulsion is prepared by in-situ multi-stage variable speed drop method, including the following steps: core layer polymerization: after heating kettle bottom liquid, initiator solution is added, then multi-stage variable speed drop is added to core layer pre-emulsion containing core layer monomer, after adjusting pH using neutralizing agent, polyacrylate core layer emulsion is obtained;Shell polymerization: multi-stage variable speed drop is added to polyacrylate core layer emulsion containing shell pre-emulsion containing shell monomer and initiator solution, heat preservation, cooling, after reaction is completed, terminating agent is added, after adjusting pH using neutralizing agent, core-shell type water-based hydroxyl acrylate microspheres emulsion is obtained. The emulsion is used in exterior wall coating, wood coating or antirust coating field. Compared with prior art, the microspheres emulsion synthesized by the present application has the advantages of high solid content, high hydroxyl value, uniform particle size, etc.

A thermoplastic polyurethane resin elastomer is obtained by reacting an isocyanate compound (I), an aliphatic alcohol (II) having a number average molecular weight determined from the hydroxyl value of less than 300 and having only a hydroxyl group as a functional group, and a polyol (III) having a number average molecular weight determined from the hydroxyl value of not less than 300 and not more than 10,000. The isocyanate compound (I) includes not less than 90 mol % in total of an aliphatic isocyanate compound containing two isocyanate groups and / or an alicyclic isocyanate compound containing two isocyanate groups. The aliphatic alcohol (II) includes not less than 90 mol % of a C12 or lower aliphatic diol. The polyol (III) includes not less than 80 mol % of a copolymerized polycarbonate diol (IIIA) including a linear repeating structural unit represented by formula (A) and a repeating structural unit represented by formula (B).

The invention discloses waterborne polyester as well as a preparation method and application thereof. The preparation method comprises the following steps: putting an intermediate compound into a pre-polycondensation product to carry out polycondensation reaction; wherein the pre-polycondensation product is a product obtained by adding an auxiliary agent into an ester and carrying out polycondensation reaction until the hydroxyl value reaches 80 mgKOH / g-100 mgKOH / g, the chemical structural formula of the ester is shown in the specification, R1, R2 and R3 are independently selected from C4-C12 alkyl groups or aryl groups, R4 and R5 are independently selected from C2-C9 alkyl groups; the chemical structural formula of the intermediate compound is shown in the specification, R6 is C3-C6 alkyl, and R7 is methyl or ethyl. The super-hydrophilic coating prepared from the water-based polyester prepared by the method has super-hydrophilicity, high wear resistance and long service life, and is suitable for the fields of building glass, medical equipment, automobile glass, electronic screens and the like which require antifogging, self-cleaning and durability requirements.

This invention relates to the field of slow rebound foam technology, and particularly to a slow rebound foam based on waste PET polyether polyol, and its preparation method. The waste PET-based polyether polyol is obtained from bis(2-hydroxyethyl) terephthalamide obtained by aminolysis of waste PET as a starting material. This not only enables the recycling and reuse of waste PET, but also allows it to be used as a foaming material for slow rebound foam. The composite polyether is composed of polyether polyol I, polyether polyol II, waste PET-based polyether polyol, and polymer polyol. By adjusting and controlling parameters such as functionality, molecular weight, hydroxyl value, viscosity, and propylene oxide content of the waste PET-based polyether polyol, it can be stably stored at room temperature without crystallization. When used as the soft segment of slow rebound foam, it significantly improves the low-temperature resistance of the slow rebound foam, avoiding the problems of slow rebound polyurethane foam hardening and becoming difficult to cut in winter, as well as poor resilience.

A polyether polyol combination for compression-resistant slow-rebound polyurethane foam, polyurethane foam and a preparation method thereof, comprising the following raw materials in parts by weight: polyether polyol A 60-90 parts, polyether polyol B 5-20 parts, polyether polyol C 10-20 parts, silicone oil surfactant 1.5-2.5 parts, chemical foaming agent 2.5-3.5 parts, amine catalyst 0.3-0.8 parts; polyether polyol A is a high-EO polyether polyol, with a hydroxyl value of 30-50 mg KOH / g, a functionality of 3, an EO content of 70%-80%, a primary hydroxyl group content of 40%-60%, and is prepared by DMC catalyst catalysis; polyether polyol B is a low-EO polyether polyol, with a molecular weight of 2500-3500, a hydroxyl value of 50-80 mg KOH / g, a functionality of 3, an EO content of 5%-10%, a PO content of 85%-92%, and is prepared by DMC catalyst catalysis; polyether polyol C is an EO-free polyether polyol, prepared by DMC catalyst catalysis. The polyurethane slow-rebound foam prepared by the application has good recovery time and excellent compression resistance, and is easy to implement and simple to operate.

The present disclosure provides aqueous dispersions of hydroxyl-functional core-shell particles. The particle core comprises a (meth) acrylic polymer and the shell comprises a polyurethane polymer. And the mass ratio of the core to the shell ranges from 20: 80 to 80: 20. The shell has a hydroxyl number of from 1 mg KOH / g to 40 mg KOH / g and an acid number of from 10 mg KOH / g to 60 mg KOH / g. The polyurethane is prepared from (a) a first prepolymer having a polymerizable ethylenically unsaturated group at one end and an active hydrogen functional group at the opposite end; (b) a second prepolymer having a polymerizable ethylenically unsaturated group at each end thereof; and (c) a third prepolymer having an active hydrogen functional group at each end thereof. Also provided are aqueous curable film-forming compositions, multi-layer coated substrates, and methods of improving adhesion and / or cohesion between coatings on a substrate.

A powder coating composition comprising an acid functional polyester resin A formed by reacting one or more polyol constituents, wherein at least 90 mole % of the polyols constituents is neopentylglycol, with one or more poly acid constituents wherein at least 87 mole % of the poly acid constituents is isophthalic acid (IPA); wherein polyester resin A has an Acid Number (AN) of between 20 and 90 mg KOH / g; and a hydroxyl value of less than 50, preferably less than 15 mg KOH / g; a glycidyl functional acrylic resin B having a weight average molecular weight of between 2500 and 7000; a curing catalyst C capable of catalyzing the reaction between the polyester resin A and the acrylic resin B; and optionally β-hydroxyalkylamide D.

The present invention relates to the technical field of fine chemical synthesis. Disclosed is a method for synthesizing bisphenol A polyether. In the synthesis method, bisphenol A is used as an initiator, and a composite catalyst consisting of a carbonate, an amine compound, and an organic phosphine is used to catalyze a ring-opening polymerization reaction of an alkylene oxide, thereby obtaining a bisphenol A polyether having a low hydroxyl value and a light color. The problems in the prior art that a product is prone to isomerization and decomposition under the action of a strong base catalyst, and that the color of the product darkens are effectively solved.

The present disclosure provides a water-based paint composition which is a single-component, has excellent storage stability, and forms a coating film having excellent workability, crack resistance, and damage resistance. The water-based paint composition of the present disclosure contains a coating film-forming resin (A), a crosslinking agent (B), a sulfonic acid compound (C), and an amine compound (D), the coating film-forming resin (A) contains an acrylic resin (A1), the hydroxyl value of the coating film-forming resin (A) is 5 mgKOH / g or more and 35 mgKOH / g or less, the crosslinking agent (B) contains a peralkyl melamine resin (B1), and the neutralization rate of the acid group of the sulfonic acid compound (C) based on the amine compound (D) is 100% or more and 1,300% or less.

The present invention provides a wax composition for cosmetics that can suppress the deterioration of storage stability of cosmetics in low-temperature, low-humidity or high-temperature, high-humidity environments, and improve the washability of cosmetics. [Solution] A cosmetic wax composition containing an ester of a linear saturated fatty acid having 14 to 26 carbon atoms and pentaerythritol, wherein the ester contains tetraester T, the content of tetraester T in the wax composition is 80 to 98% by mass, the wax composition has an acid value of 2 mg KOH / g or less, a hydroxyl value of 1 mg KOH / g or more and 10 mg KOH / g or less, and a melting point of 75°C or higher.

The invention relates to the field of separation membranes, and discloses a caustic material separation membrane and a preparation method thereof, the caustic material separation membrane comprises a porous carrier and a cross-linking layer on the surface of the porous carrier; the cross-linking layer is prepared by cross-linking a pre-cross-linking product of a polyol compound and an anionic polymer with a cross-linking agent; the hydroxyl value of the polyhydric alcohol compound is 400 to 2000 mgKOH / g; the anionic polymer at least comprises one acidic group; the cross-linking agent at least comprises one reactive group; the reactive group is one of carboxyl, aldehyde group and amido. According to the invention, an adjustable semi-interpenetrating network cross-linking layer is formed on the surface of the porous carrier through the cross-linking reaction of the polyol compound and the anionic polymer with the cross-linking agent, so that the separation membrane can be used in caustic feed liquid for a long time, the separation precision is adjustable, and the scale inhibition performance is good.

The invention discloses a low-temperature foaming forming method of all-water foaming combined polyether, and relates to the technical field of foaming forming of all-water foaming combined polyether. By optimizing a premix formula and accurately controlling process parameters (such as temperature, pressure and stirring conditions), efficient and uniform foaming reaction is realized in a low-temperature (10-30 DEG C) environment. According to the method, energy consumption and equipment requirements are remarkably reduced, meanwhile, the density consistency, compression strength and durability of foam products are improved, and the harsh application requirements in the fields of building energy conservation, household appliance heat preservation and the like are met. The polyether polyol with a specific hydroxyl value and the catalyst and the stabilizer with low addition amount are adopted, so that the foaming activity at low temperature is ensured; by combining nitrogen protection closed stirring, oxidation side reaction is prevented; and through a constant-temperature mold and gradient cooling shaping, a foam microstructure is optimized, internal stress is reduced, and finally a product with high dimensional precision and surface smoothness is obtained.

The invention relates to solvent-borne one-pack clearcoat material, characterized in that it comprises i.) one or more hydroxy functional polymers (A), at least one of which is a poly(meth)acrylate (A1), possessing a) a glass transition temperature below -15 °C as determined by differential scanning calorimetry; b) a hydroxyl value in the range from 130 mg KOH / g to 300 mg KOH / g; and c) a weight-average molecular weight determined by gel permeation chromatography using a polystyrene standard; ii.) one or more crosslinking agents (B), at least one of which is a melamine-formaldehyde resin possessing methoxymethyl groups (B1); and iii.) a catalyst system (C) comprising one or more amine-blocked sulfonic acids (C1); and one or more phosphoric acid catalysts (C2). The invention further related to a multilayer coating system comprising a clearcoat layer formed from said clearcoat material, a method of preparing such multilayer coating system and a thus coated substrate, as well as the use of the solvent-borne one-pack clearcoat material for coating uncoated or precoated substrates, preferably vehicle bodies or parts thereof in OEM or repair coating.

This invention discloses modified bio-based polyether polyols and their preparation methods, relating to the field of polyether polyol technology. The invention modifies the molecular structure of epoxy greases by grafting, introducing triazine ring compounds for ring-opening modification, and simultaneously combining other initiators to increase its functionality, thereby increasing the degree of crosslinking of its molecular structure during application. After epoxide alkane polymerization modification and molecular weight adjustment, modified bio-based polyether polyols with appropriate hydroxyl values ​​and viscosities are obtained.

The invention relates to the technical field of polymer coating materials, discloses a bio-based degradable waterborne polyurethane packaging coating, and aims to solve the problems that an existing bio-based waterborne polyurethane coating is prone to non-light-oxygen oxidation discoloration due to the fact that intrinsic phenolic hydroxyl groups of raw materials of bio-based waterborne polyurethane are prone to non-light-oxygen oxidation discoloration in the storage period, and consequently early-stage yellowing and transparency reduction of the coating are caused. The preparation method comprises the following steps: firstly, carrying out ring opening etherification on cardanol phenolic hydroxyl and allyl glycidyl ether to convert the cardanol phenolic hydroxyl and allyl glycidyl ether into high-hydroxyl-value polyurethane polyol, and retaining a side chain unsaturated structure; carrying out reversible formalization protection on residual trace phenolic hydroxyl groups after the reaction by adopting methoxy methyl ether, so that the phenolic hydroxyl groups are in a passivated state in the storage stage of the dispersoid; and finally, when the coating forms a film, the microencapsulated citric acid releases weak acid to trigger deprotection, and the free phenolic hydroxyl group is quantitatively recovered, so that the stability of the phenolic hydroxyl group in the storage period and the separation and regulation of the functionality after film formation are realized, and the problem of yellowing in the storage period is solved on the premise of not sacrificing the bio-based content, the mechanical property and the degradability.

The present invention provides a coating composition that exhibits excellent adhesion to a substrate and water resistance. It also provides a method for repairing damaged areas of an existing coating film formed on an article using the aforementioned coating composition. [Solution] A urethane coating composition comprising a hydroxyl group-containing component (a) and an isocyanate-containing component (b), wherein the hydroxyl group-containing component (a) comprises a hydroxyl group-containing (meth)acrylic component (a1), the hydroxyl group-containing (meth)acrylic component (a1) has a glass transition temperature of 85°C or less, a hydroxyl value (on a solid content basis) X of 10 mg KOH / g or more and 180 mg KOH / g or less, a number average molecular weight Y of 2,000 or more and 20,000 or less, and the ratio of X to Y, expressed as "X / Y × 100", is 0.10 or more and 5.00 or less.

The invention provides a hard polyurethane foam, the raw material of the hard polyurethane foam comprises a polyol composition, the polyol composition comprises a polyether polyol A with an average functionality of 4.5-5.2 and a hydroxyl value of 340-370 mgKOH / g, a polyether polyol B with an average functionality of 3.5-4.0 and a hydroxyl value of 370-390 mgKOH / g, a polyether polyol C with an average functionality of 2.8-3.2 and a hydroxyl value of 150-170 mgKOH / g, and a polyol component, the average functionality of the polyether polyol is 4.8-5.3, the hydroxyl value of the polyether polyol is 360-380 mgKOH / g, the average functionality of the polyester polyol E is 2.8-3.2, and the hydroxyl value of the polyester polyol E is 220-250 mgKOH / g; the mass ratio of the polyether polyol A to the polyether polyol B to the polyether polyol C to the polyether polyol D to the polyester polyol E is (10-30): (5-15): (30-50): (10-25): (5-20). The polyurethane foam with better performance can be prepared by using the polyhydric alcohol combination system in combination with normal-pressure foam injection and decompression foaming processes.

The invention relates to the technical field of reinforcing materials, in particular to a reactive mining low-temperature reinforcing material and a preparation method and application thereof. The reactive mining low-temperature reinforcing material is composed of a component A and a component B. The component A comprises polyester polyol, polyether polyol, a silane coupling agent and a catalyst. The component B comprises a prepolymer and an auxiliary agent; the prepolymer is obtained by carrying out a reaction on polyether polyol b and polymethylene polyphenyl polyisocyanate; the functionality of the polyether polyol b is 3.1, the hydroxyl value of the polyether polyol b is 207 mgKOH / g, and the polyether polyol b is formed by taking maltitol, trimethylolpropane, hydroquinone and triethylene glycol as initiators and polymerizing the initiators with epoxypropane. The material prepared by the invention mainly adopts a reactive structure flame retardant, so that the influence of addition of a large amount of additive flame retardants on the strength of the material is avoided, and the prepared material is high in compressive strength, low in internal reaction heat and good in flame retardant property.

The present invention provides an adhesive composition capable of forming an adhesive layer or the like having excellent high-temperature properties. The adhesive composition of the present invention comprises a (meth)acrylic polymer (A), a rosin-based tackifying resin (B) having a glass transition temperature of 85°C or higher, a hydroxyl value of more than 45 mgKOH / g, and an acid value of 5 to 20 mgKOH / g, and a crosslinking agent (C).

The invention belongs to the field of fluorine-containing material testing, and particularly relates to a perfluoropolyether alcohol hydroxyl value content determination method, which comprises: (1) preparing an acylation reagent, (2) setting a test sample and a blank sample, (3) titrating the test sample and the blank sample by using a non-aqueous titration method, and (4) calculating the hydroxyl value. The acylation reagent adopted by the invention is transparent and colorless, does not have obvious color change in a normal-temperature placement or reaction process, and does not influence the judgment of a titration end point; the sample can be quickly dissolved, the uniformity of a reaction system is improved, and the problems of low reaction rate and incomplete reaction caused by contact blockage of the sample and an acylation reagent in different phases are avoided. The method provided by the invention can improve the stability and accuracy of the test result of the hydroxyl value of the perfluoropolyether polyol, and can be suitable for testing the hydroxyl value of the perfluoropolyether polyol with the molecular weight of 500-100000 g / mol.

Provided are an active energy ray-curable composition, a cured coating film, and a thin film which are coated on the surface of a substrate and cured to impart antistatic properties, and which have transparency and light transmittance to a degree that can be used in optical applications, and which have scratch resistance and bending resistance. The composition contains components (A) to (D), the content of component (C) is 4 parts by mass or less relative to 100 parts by mass of the resin solid content in the composition, and 10% by mass or more of a resin component having a hydroxyl value of 60 mgKOH / g or more is not contained relative to 100% by mass of the resin solid content in the composition. Component (A): a photoinitiator containing a water-soluble photoinitiator (a1); component (B): a polyfunctional (meth) acrylate containing an oxyalkylene chain-containing compound (b1). Component (C): conductive polymer microparticles; component (D): an organic solvent containing a solvent (d1) having a boiling point of 130 DEG C or higher and a Hansen solubility parameter [delta] H12.0 or higher.

Provided is a laminate having excellent stretchability and solvent resistance. A laminate having a base film and a transparent layer, the transparent layer being a layer formed by curing a composition containing a fluorine-containing polymer having a hydroxyl group or a carboxyl group, a non-fluorine polymer, and a curing agent having a functional group that reacts with the hydroxyl group or the carboxyl group, the fluorine-containing polymer having a hydroxyl value or an acid value of 20 mgKOH / g or more, and the content of the fluorine-containing polymer being 30% by mass or less relative to the total content of the fluorine-containing polymer and the non-fluorine polymer.

The invention discloses an all-water-blown polyurethane self-skinning motor cover material and a preparation method thereof.The preparation method of the all-water-blown polyurethane self-skinning motor cover material comprises the steps that polyether polyol with the functionality being 2-4, polymer polyol with the hydroxyl value being 18-32 mgKOH / g, a chain extender, water, a catalyst and a foam stabilizer are evenly mixed to obtain a component A; uniformly mixing isocyanate and a liquid flame retardant to obtain a component B; preparing a component C to obtain a solid flame retardant; the preparation method comprises the following steps: uniformly mixing the component A and the component C, then uniformly mixing the mixture with the component B to obtain a mixture, carrying out mold closing and curing on the mixture, and controlling the mold temperature to be 25-75 DEG C during mold closing and curing. According to the invention, surface urea bond accumulation is realized through matching of solid and liquid flame retardants and surface self-skinning, so that the material can realize a long-period anti-aging effect and a high-efficiency V0-level flame-retardant effect in a high-temperature environment of more than 150 DEG C, and has high thermal aging resistance and flame retardance.

The application relates to a method for reducing monomers in polylactic acid polyols. The method provided by the application comprises subjecting polylactic acid polyols to distillation treatment in a molecular distillation device to obtain treated polylactic acid polyols. The method provided by the application can not only ensure the reduction of monomer content, but also reduce the occurrence of side reactions such as cracking and yellowing of polylactic acid polyols caused by the distillation process, ensure that the acid value and hydroxyl value of the product are qualified and stable, and to some extent, can narrow the molecular weight distribution of the product and improve the uniformity of the product.

The present application belongs to the technical field of reactive flame-retardant polyether polyols for polyurethane, and relates to a hydrolysis-resistant flame-retardant polyether polyol and a preparation method thereof. The polyether polyol is formed by compounding trihydroxy polyoxypropylene ether and a phosphorus-containing reactive polyether polyol. The phosphorus-containing reactive polyether polyol is prepared by reacting 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, diethanolamine and paraformaldehyde, and then reacting with propylene oxide. The obtained product has a high hydroxyl value, moderate viscosity, low acid value, low moisture content, and low total content of sodium and potassium. After being immersed in water, the hydroxyl value retention rate is high, the relative increase in viscosity is small, and the increase in acid value is controlled. The product can solve the problem that the existing phosphorus-containing reactive polyether polyol flame-retardant is difficult to balance the flame-retardant improvement, flowability, reactivity and hydrolysis-resistant stability, and can be used for preparing polyurethane materials that require flame retardancy and hydrolysis-resistant stability.

The invention discloses a crevice corrosion and flash corrosion resisting liquid medicine for an MSAP process and a using method of the crevice corrosion and flash corrosion resisting liquid medicine. The flash etching liquid medicine comprises 40-60 g / l of sulfuric acid, 20-30 g / l of hydrogen peroxide, 0.5-2.0 g / l of a stabilizer, 2.0-5.0 g / l of hyperbranched polyol, 0.1-0.5 g / l of tungstate, 0.02-0.04 g / l of a wetting agent and the balance of water. The number-average molecular weight of the hyperbranched polyol is 500 to 1200, and the hydroxyl value of the hyperbranched polyol is 500 to 700 mKOH / g. Through the synergistic effect of the hyperbranched polyol and the tungstate, the corrosion reaction in the included angle gap is effectively inhibited, the bottom lateral erosion amount can be controlled within 0.5 [mu] m, the problem of accelerated lateral erosion caused by the included angle gap in the IC carrier plate MSAP process is solved, and the processing requirement of a high-end IC carrier plate for a fine circuit is met.

Ink and coating compositions, including inkjet inks, comprising a blend of OH-PUDs having hydroxyl values preferably greater than 25, and more preferably greater than 50 mgKOH / g, with PUDs having hydroxyl values of less than 25, and more preferably less than 5 mgKOH / g.