The present invention relates to an acid-resistant and alkali-resistant composition, a preparation process thereof and use thereof in producing an article, and an article comprising a substrate coated or impregnated with the same and the preparation method and use of the article. The composition contains: at least one aqueous polyurethane dispersion having a carboxyl group; at least one crosslinking agent having an isocyanate reactive group; at least one crosslinking agent having a carboxyl reactive group; and optionally an additive; wherein, the amount of the carboxyl groups in said aqueous polyurethane dispersion is more than 0.05 wt %, based on the amount of said aqueous polyurethane dispersion being 100 wt %; the amount of said crosslinking agent having an isocyanate reactive group is 0.2 wt %-10 wt %, based on the amount of said composition being 100 wt %; the molar ratio of the carboxyl reactive groups to the carboxyl groups of said composition is more than 0.5. The film formed with the composition of the present invention has good acid-resistance and alkali-resistance. The product obtained by treating with the composition of the present invention has flat appearance and good handfed.

Disclosed is a method of manufacturing a polyurethane filter foam having excellent air permeability, elasticity, and restoring force. In the method of manufacturing the polyurethane filter foam, the cell size of the filter foam is made regular by controlling the pressure by adjusting the diameter of the foaming head of a foaming machine, rather than adding a cell opener, cell irregularity caused by poor dispersion of the cell opener is alleviated, and air permeability, porosity, and compression set are excellent.

The disclosed adhesive compositions comprise (A) an isocyanate component comprising an isocyanate-terminated prepolymer that is the reaction product of a polyisocyanate and an isocyanate-reactive mixture comprising a phosphate ester polyol. The disclosed adhesive compositions further comprise (B) an isocyanate-reactive component polyol component comprising a polyol. In some embodiments, methods for preparing two-component adhesives formulations are disclosed comprising preparing an isocyanate component comprising an isocyanate-terminated prepolymer by reacting a polyisocyanate with an isocyanate-reactive mixture comprising a phosphate ester polyol and preparing an isocyanate-reactive component comprising a polyol. The methods further comprise mixing the isocyanate component and the isocyanate-reactive component at a stoichiometric ratio (NCO/OH) of from about 1.0 to about 5.0. Methods for forming laminate structures, and the laminate structures themselves, are also disclosed.

The present disclosure relates to acid-blocked alkylaminopyridine catalysts for use in a polyurethane formulation. The polyurethane formulation may include the acid-blocked alkylaminopyridine catalyst, a compound containing an isocyanate functional group, an active hydrogen-containing compound and a halogenated olefin compound.

An alkoxylated bio-oil composition is provided. The alkoxylated bio-oil composition may include an alkoxylated bio-oil prepared from an alkoxylation of dewatered bio-oil. A method for preparing an alkoxylated bio-oil composition is provided. A copolymer composition is provided. The copolymer composition may include an alkoxylated bio-oil copolymer unit. A method for preparing a copolymer composition is provided.

The present invention provides a two-component polyurethane composition, and belongs to the technical field of high polymer material. The two-component polyurethane composition comprises component A and component B. According to mass percent, the component A comprises 0-100% of high activity polyether polyol, 0-100% of cross-linking agent, 0-40% of chain extender, 0-50% of plasticizer and 0-5% of catalyst; according to mass percent, the component B comprises 0-100% of diphenylmethane diisocyanate and derivative thereof, and 0-50% of plasticizer; and the mass ratio of the component A to the component B is 1:0.1-1:3. The two-component polyurethane composition provided by the present invention has low heat release and excellent mechanical properties.

An alkoxylated bio-oil composition is provided. The alkoxylated bio-oil composition may include an alkoxylated bio-oil prepared from an alkoxylation of dewatered bio-oil. A method for preparing an alkoxylated bio-oil composition is provided. A copolymer composition is provided. The copolymer composition may include an alkoxylated bio-oil copolymer unit. A method for preparing a copolymer composition is provided.

The present invention relates to a method for preparing an aqueous polyurethane (PU) dispersion with non-ionic reactive emulsifiers and sulfonate groups. The aqueous PU dispersion includes the following components: 10-40 parts by weight of polymer polyol, 5-20 parts by weight of isocyanate monomer, 0.1-1.5 parts by weight of trimethylolpropane, 3-15 parts by weight of monofunctional alkoxy polyethylene glycol or propylene glycol, 0.5-2.0 parts by weight of diaminosulphonate chain extender, 0.5-3.0 parts by weight of non-ionic organic amine chain extender, 0.01-0.05 parts by weight of catalyst, 0-8 parts by weight of organic solvent, 50-80 parts by weight of deionized water, and 0.1-5 parts by weight of thickener. In the presence of non-ionic reactive emulsifiers, introduction of sulfonate groups at late chain extension stage of the aqueous PU dispersion obtain stable large-size polymer particles. A coating film thereof has a 60° gloss of <1.0; the emulsion has excellent storage stability and redispersibility.

The present invention provides a process for producing a rigid polyisocyanurate foam involving reacting at an isocyanate index of from about 175 to about 400, a polyisocyanate with at least one natural-oil polyol containing at least about 35 wt. %, based on the weight of the polyol, of natural oil, having a hydroxyl number from about 175 to about 375 and a hydroxyl functionality of about 2.0 to about 2.8, in the presence of a blowing agent and optionally, in the presence of one or more of surfactants, flame retardants, pigments, catalysts and fillers, wherein the resulting foam has a renewable biobased content of at least 8% by weight. The foams provided by the inventive process possess properties similar to foams produced from petroleum-derived materials and may find use in wall or roof insulation systems. The high biobased content (>8%) may allow wall or roof insulation systems containing these foams to be considered for the U.S. Government's preferred procurement program.

A molding method for producing a screw drill stator using an elastomer material includes: S1. sequentially roughening, cleaning and drying an inner surface of the stator tube; mixing an adhesive and a diluent, coating the mixture obtained on the inner surface, and heating it for later use; S2, uniformly coating a mold release agent on a surface of a mandrel mold, and heating or drying it naturally for later use; S3. assembling the processed stator tube and the processed mandrel mold to obtain an assembled mold; S4. performing a vacuum defoaming under negative pressure on a mixture obtained by uniformly mixing a prepolymer of the elastomer material with a defoaming agent; S5. uniformly mixing the defoamed prepolymer of the elastomer material with a curing agent, and pouring the obtained mixture into the assembled mold, sealing and curing the poured assembled mold by hierarchical heating to obtain the stator.