52 results about "Polyol formation" patented technology

A polyurethane foam, a polyurethane/polyorganosiloxane foam, and a polyurethane foam polyurethane/polyorganosiloxane foam material are disclosed and described herein. The materials are formed in the presence of a polymerization reaction initiator (an isoprenoid compound), and a polymerization reaction accelerator. The polyurethane foam is formed from an isocyanate and a polyol. The polyurethane foam polyurethane/polyorganosiloxane foam material comprises the polyurethane foam which is cross-linked to the polyurethane backbone to a polyurethane/polyorganosiloxane foam. Optional gelling agents, emulsification control agents, reinforcement fillers, cross-linkers, reinforcement polymers, rubber reinforcers, silk proteins, emollients, stabilizers and colorants are also described. The polyurethane and polyurethane-polyorganosiloxane foam materials exhibit a high degree of flexibility, resilience and excellent impact absorption.

A graft polyol is used to form a polyurethane article including the reaction product of the graft polyol and an isocyanate. The graft polyol is formed from a method including the steps of providing a polymerizable monomer, providing a chain transfer agent, providing a carrier polyol, and providing a free radical initiator. The polymerizable monomer includes styrene and acrylonitrile. The chain transfer agent includes from three to nine carbon atoms, at least one thiol moiety, and at least one hydrophilic moiety. The carrier polyol includes a polyetherol and the free radical initiator includes a diimide. The method also includes the step of combining the polymerizable monomer, the chain transfer agent, the carrier polyol, and the free radical initiator including free radicals. The method further includes the step of reacting the polymerizable monomer and the free radicals to polymerize the polymerizable monomer and form the graft polyol.

Provided are: a polycarbonate-based resin composition, including: (A) 100 parts by mass of a resin mixture formed of: 30 to 100 mass % of a PC-POS copolymer (A-1) which has constituent units represented by a general formula (I) and a general formula (II), and in which an average repetition number n of organosiloxane constituent units in the general formula (II) is 70 to 500; and 70 to 0 mass % of an aromatic polycarbonate resin (A-2) except the PC-POS copolymer (A-1); (B) 0.01 to 0.15 part by mass of an alkaline (earth) metal salt of an organic sulfonic acid; (C) 0.1 to 1 part by mass of a polytetrafluoroethylene having a fibril-forming ability; and (D) 2 to 15 parts by mass of titanium dioxide particles each having, on an outermost surface thereof, a coating layer formed of a polyol free of a nitrogen atom; a molded article obtained by molding the resin composition; and a structure member for solar photovoltaic power generation formed of the molded article. The polycarbonate-based resin composition, molded article, and structure member for solar photovoltaic power generation each have excellent flame retardancy and excellent tracking resistance without impairing a low-temperature impact characteristic which a PC-POS copolymer has.

The polishing pad is useful for polishing at least one of magnetic, optical and semiconductor substrates. The polishing pad includes a polishing layer having a polyurethane window. The polyurethane window has a cross-linked structure formed with an aliphatic or cycloaliphatic isocyanate and a polyol in a prepolymer mixture. The prepolymer mixture is reacted with a chain extender having OH or NH₂ groups and having an OH or NH₂ to unreacted NCO stoichiometry less than 95%. The polyurethane window has a time dependent strain less than or equal to 0.02% when measured with a constant axial tensile load of 1 kPa at a constant temperature of 60° C. at 140 minutes, a Shore D hardness of 45 to 90 and an optical double pass transmission of at least 15% at a wavelength of 400 nm for a sample thickness of 1.3 mm.

A golf ball including a core and a cover layer including a curing agent and a polyurethane prepolymer formed from a polyisocyanate and a monodisperse telechelic polyol having a polydispersity of from about 1.0 to about 1.3, and having the formula:

T-Z_n-C—Y—C-Z_n-T

where Y is at least one molecule or mixtures of molecules having at least two independently polymerized vinyl groups, such as 1,3-divinylbenzene or 1,4-divinylbenzene; C is a hydrogenated or unsaturated block derived by anionic polymerization of at least one monomer selected from the group consisting of conjugated dienes, alkenyl-substituted aromatics, and mixtures thereof; Z_n is a branched or straight chain hydrocarbon connecting group which contains n=1-50 carbon atoms; and T is hydroxyl.

The invention provides a neem oil nanometer composition, and belongs to the field of cosmetic. The neem oil nanometer composition comprises, by weight, 1.0 to 30.0% of neem oil, 25.0 to 75.0% of an emulsifier, 0.8 to 17.0% of a co-emulsifier, 1.0 to 65.0% of a polyhydric alcohol, 0.01 to 2.0% of an anti-oxidant, and 0.01 to 4.0% of an antiseptic. According to a preparation method, a homogeneous disperse system with thermodynamic stability is formed by neem oil, the emulsifier, the co-emulsifier, and the polyhydric alcohol, water solubility is high, stability is high, no floating oil is generated, no aggregation is caused, and excellent mosquito repelling, bacteria inhibiting, inflammation relieving, and pain eliminating effects are achieved. The neem oil nanometer composition is high in drug loading capacity, is capable of entering skin deep tissue through skin stratum corneum, releasing neem oil continuously, and achieving excellent mosquito repelling, bacteria inhibiting, inflammation relieving, and pain eliminating effects.

The present invention discloses a Polyurethane (PU) composite material comprising a thermoplastic polyurethane and a filler. The thermoplastic polyurethane comprises a linear polyurethane main-chain, and the polyurethane main-chain comprises a soft segment and a hard segment. The hard segment of the polyurethane main-chain is formed by a diisocyanate and a chain extender, and the soft segment of the polyurethane main-chain is formed by a polyol. The present invention also teaches the application of the disclosed thermoplastic polyurethane composite material in dental root canal material.

The invention provides a ceramic green sheet having plasticity, punching property, and sinterability of satisfactory levels as well as a low percent (heat) shrinkage. In the production of a ceramic slurry serving as a raw material of the sheet, ingredients thereof are mixed under such conditions that the functional group ratio (polyol to isocyanate) is 1.5/11.5 to 11.5/11.5; the urethane resin formed from isocyanate and polyol has a repeating-unit-based molecular weight of 290 to 988; and the ratio by weight of the urethane resin to a ceramic powder falls within a range of 4.5 to 10 parts by weight of the urethane resin with respect to 100 parts by weight of the ceramic powder. As a result, a ceramic green sheet having, in well balance, all of the properties (i.e., plasticity, punching property, sinterability, and (heat) shrinkage) required for facilitating subsequent processes such as mechanical working and firing can be provided.

A cleaning blade member comprising a polyurethane formed by using a polyol consisting essentially of a polycarbonatediol, a polyisocyanate, and a crosslinking agent containing a short chain diol and a triol, the polyurethane having a tensile strength at 60° C. of 200 kg/cm² or higher, and a tensile strength retention ΔT, represented by the following equation, of 40% or more:

ΔT(%)=T₆₀/T₁₀×100

where T₁₀ denotes a tensile strength at 10° C., and T₆₀ denotes the tensile strength at 60° C.

Provided is a method of manufacturing a porous current collector, which can fabricate a porous current collector in such a way as to fabricate alcohol-resolvable resin as an etch mask pattern by printing polyhydric alcohol on a surface of the alcohol-resolvable resin in a pattern and to form a plurality of through holes in a metal sheet using the etch mask pattern. The method includes the steps of forming an alcohol-resolvable resin layer by coating alcohol-resolvable resin on a surface of a metal sheet, forming an alcohol-resolvable mask pattern layer by printing polyhydric alcohol on a surface of the alcohol-resolvable resin layer after the alcohol-resolvable resin layer is formed, and etching the metal sheet so that a plurality of through holes is formed in the metal sheet using the alcohol-resolvable mask pattern layer as a mask after the alcohol-resolvable pattern layer is formed.

Fiber coatings with low Young's modulus and high tear strength are realized with coating compositions that include an oligomeric material formed from an isocyanate, a hydroxy acrylate compound and a polyol. The oligomeric material includes a polyether urethane acrylate and a di-adduct compound, where the di-adduct compound is present in an amount of at least 2.35 wt%. The reaction mixture used to form the oligomeric material may include a molar ratio of isocyanate:hydroxy acrylate:polyol of n:m:p, where n may be greater than 3.0, m may be between n-1 and 2n-4, and p may be 2. Young's modulus and tear strength of coatings made from the compositions increase with increasing n. Coatings formed from the present oligomers feature high tear strength for a given Young's modulus.

The invention discloses a preparation method of oligomerization aspartic resin. The preparation method comprises the following steps: maleic anhydride and dihydric alcohol or polyhydric alcohol form hydroxyl-terminated oligomerization polyester with the polymerization degree of 2-10; and then carrying out Michael addition reaction on the polyester by sterically hindered primary amine to synthesizethe oligomeric polyfunctional aspartic resin. By synthesizing the polyfunctional aspartic resin, namely improving the functionality of secondary amine in the polyaspartic acid ester, the crosslinkingdensity of the polyaspartic acid ester polyurea can be increased, so that the performance of the polyaspartic acid ester polyurea in an extreme environment is improved.

The invention relates to a method for regulating and controlling the activity of a vanadium phosphorus oxide catalyst. The method comprises the following steps that a vanadium phosphorus oxide precursor is prepared; in a ball milling tank, the vanadium phosphorus oxide precursor and a deep eutectic solvent are mixed according to the mass ratio of (20-100): 1, balls are added according to the ball-powder mass ratio of 1: (0.5-2), then a ball mill is used for ball milling for 4-8 h, a ball milling product is obtained, and the deep eutectic solvent is formed by choline chloride and organic polyol; and the ball milling product isactivated to obtain the vanadium phosphorus oxide catalyst. According to the method, the deep eutectic solvent is regulated and added, so that the activity and selectivity of the vanadium phosphorus oxide catalyst product are remarkably improved compared with those of the existing catalyst, the cost is low, the method is convenient and fast, and the method has important significance on industrial production.

The invention discloses a method for ultrasonically extracting artemisinin by using a deep eutectic solvent. The method comprises the following steps of: A, pretreating artemisia annua leaves to obtain artemisia annua leaf powder; B, mixing the artemisia annua leaf powder with an aqueous solution of a deep eutectic solvent, and carrying out ultrasonic treatment to obtain a mixed treatment solution, wherein the deep eutectic solvent comprises a hydrogen bond donor and a hydrogen bond acceptor, the hydrogen bond donor is quaternary ammonium salt, and the hydrogen bond acceptor is polyalcohol; and C, carrying out solid-liquid separation on the mixed treatment solution to obtain an artemisia apiacea extracting solution. The deep eutectic solvent formed by quaternary ammonium salt and polyalcohol and artemisinin belong to the same kind or analogues with similar substance components, and the deep eutectic solvent and artemisinin have similar action effects; removal is not needed after the artemisinin is ultrasonically extracted with the deep eutectic solvent, and the structure of the artemisinin cannot be damaged; and therefore, the process can be better simplified, the cost is saved, the extraction efficiency is improved, and the environment is protected.