428 results about "Polyether polyurethane" patented technology

A lubricious coating including at least one ethylenically unsaturated resin and at least one hydrophilic aliphatic polyether polyurethane which does not crosslink with said ethylenically unsaturated resin, and to methods of making and using the same.

This invention relates to improved absorbent structures containing improved water-swellable material that can significantly withstand deformation by an external pressure, thus showing improved liquid handling properties. In particular, this invention relates to absorbent structures comprising water-swellable material with an improved absorbent capacity/permeability balance. The water-swellable material is typically in the form of particles, which comprise a core of water-swellable polymer(s) and a shell of said elastomeric polymer(s), preferably selected polyetherpolyurethanes, whereby the water-swellable material is such that it can withstand deformation due to external pressure. The invention also relates to diapers, adult incontinence articles and sanitary napkins comprising said absorbent structure of the invention.

The invention discloses an enhanced polyurethane microcellular elastomer composite material and a preparation method thereof. The material is a reaction product of a polyol A component and a prepolymer B component, wherein the polyol A component is a mixture of 60-95 weight parts of polymer polyether polyol, 5-40 weight parts of polyether polyol I and auxiliaries; the prepolymer B component is a prepolymer prepared through the reaction of 35-70 weight parts of isocyanate and 30-50 weight parts of polyether polyol II; 0.1-7.5 weight parts of inorganic nanometer filler is added in the polyether polyol II; the NCO content of the prepolymer is 17-30wt.%. The preparation method the material is casting moulding process. The preparation method disclosed by the invention has the advantages that the material cost is reduced while the mechanical property of polyether polyurethane microcellular elastomers is increased at the same time; the application area of the material is greatly broadened. The material disclosed by the invention can be used for shoe parts, shoe sole materials, load-bearing tyres, automotive shock-absorbing buffering materials, bridge buffering shock-absorbing materials and the like.

The invention discloses a high-performance nanometer polyurethane microcellular elastomer composite material and a preparation method thereof. Organic montmorillonite is added into polyether glycol I, heated and stirred, thus obtaining stably dispersed colloidal fluid; then polyether glycol II, an alcohols chain-extender, a foaming agent, a foam stabilizer and a catalyst are added, fully and evenly mixed, thus obtaining component A. B component is a performed polymer prepared by the reaction of the polyether glycol I, vulcabond or polyisocyanates at the temperature between 60 and 90 DEG C, with NCO percentage controlled between 17 and 26 percent by weight. The components A and B are mixed at high speed according to the weight mixture ratio that A:B equals to 0.5:1 to 3:1 by using a casting machine and at the temperature of 30-55 DEG C, and injected into a mould for injection moulding, consequently, the high-performance nanometer polyurethane microcellular elastomer composite material is obtained. With low cost, the invention improves a plurality of mechanical properties of a polyether polyurethane microcellular elastomer, such as the tensile strength, modulus and tear strength and the like, and broadens the application field of materials. The composite material can be used as shoe parts, bottom materials, bearing tires or shock absorption buffering materials, and the like. With a bi-component system and a casting moulding technology adopted simultaneously, the invention is simple and can be easily controlled, thus bringing convenience to production promotion.

The invention belongs to the technical field of polyurethane materials and relates to a method for preparing novel a polyether-polyester polyurethane material, in particular to a method for preparing a polyether-polyester polyurethane material by a two-step process. The method is characterized by comprising the following steps of: preparing a polyether prepolymer and a polyester prepolymer respectively by using polyether polyhydric alcohol and polyester polyhydric alcohol and diisocyanate, mixing the two prepolymers according to a ratio, and crosslinking by using a chain extender to prepare novel polyether-polyester polyurethane. The polyether-polyester polyurethane material has the combined excellent performance of a polyether polyurethane material and a polyester polyurethane material, and has the wide-temperature range damping performance. The preparation method is simple and convenient and stable and mild in process and allows for controlling product performance, and can be used for large-scale industrial production. The polyether-polyester polyurethane material can be widely used as a damping material, an elastic material, a wearing resistant material, a sealing material, an anticorrosive material, a medical material, a sports material, a bonding material and the like.

A rubber mixture, comprising (A) at least one rubber selected from the group of ethylene-propylene-diene copolymer (EPDM), ethylene-propylene copolymer (EPM), chloroprene rubber (CR), chloropolyethylene (CM), chloro-isobutene-isoprene (chlorobutyl) rubber (CIIR), chlorosulfonyl polyethylene (CSM), etylene-vinyl acetate copolymer (EAM), alkyl acrylate copolymer (ACM), polyester polyurethan (AU), polyether polyurethane (EU), bromo-isobutene-isoprene (bromobutyl)rubber (BIIR), polychlorotrifluoroethylene (CFM), isobutene-isoprene rubber (butyl rubber, IIR), isobutene rubber (IM), polyisoprene (IR), thermoplastic polyester polyurethane (YAU), thermoplastic polyether polyurethane (YEU), silicone rubber with methyl groups on the polymer chain (MQ), hydrogenated acrylonitrile-butadiene rubber (HNBR), acrylonitrile-butadiene rubber (NBR) or carboxylated acrylonitrile-butadiene rubber (XNBR), (B) at least one oxidic filler, and (C) at least one silicon containing azodicarbamide of the general formula I (R 1 ) 3-a (R 2 ) a Si-R I -NH-C(O) -N=N-C (O)-NH-R I -Si(R 1 ) 3-a (R 2 ) a (I) . The rubber mixture is produced by mixing at least one rubber, at least one oxidic filler, and at least one silicon containing azodicarbamide of the general formula I. It may be used for moldings.

The invention discloses an ultraviolet-curing type optical resin adhesive. The ultraviolet-curing type optical resin adhesive consists of the following materials in parts by weight: 10-30 parts of tri-functionality polyether polyurethane acrylate which is prepared through the reaction of polyether trihydric alcohol, diisocyanate and hydroxyl acrylate, 5-40 parts of double-functionality polyether polyurethane acrylate which is prepared through the reaction of polyether glycol, diisocyanate and hydroxyl acrylate, 10-50 parts of plasticizers, 15-45 parts of acrylate reactive diluents, 1-5 parts of photoinitiators and 1-3 parts of silane coupling agents. The ultraviolet-curing type optical resin adhesive has the advantages of being simple and easily available, low in cost and suitable for industrial application and the like.

The invention provides a novel fixing system applied to orthopedic surgery. The novel fixing system comprises a cotton cavity with a dual-layer structure and an opening at one side and polymer foaming material; the polymer foaming material is filled in a sandwich layer of the cavity; the cotton cavity is provided with a zip or a nylon fastener belt to connect the cotton cavity; the cotton cavity closely covers and is attached to the part to be fixed. The invention also provides an application method of the system and polyether polyurethane used for the system.

A thermoplastic polyether polyurethane having high moisture vapor transmission, high melting point and static dissipative properties is disclosed. The thermoplastic polyether polyurethane is prepared by reacting a hydroxyl terminated polyether intermediate, an aromatic chain extender glycol, and a polyisocyanate. The polymers formed are useful for melt-spun fibers, fabric coatings for breathable garments, house wrap, roofing membranes, and other applications requiring high vapor transmission and high melting points.

The invention discloses a room-temperature moisture cured one-component water-expansion polyurethane sealant which is paste and comprises the following raw materials in parts by weight: 30-50 parts of liquid polyether polyurethane prepolymer base material, 10-25 parts of plasticizer, 0.5-1 part of a coupling agent, 10-30 parts of super water absorbent resin, 10-30 parts of other fillers, 0.01-0.05 part of catalyst and 0.2-3 parts of adjuvant. The preparation method of the sealant comprises the following steps: 1. placing di-functionality polyether glycol and tri-functionality polyether glycol in a container according to a weight ratio, stirring and dehydrating by a vacuum pump, and then adding polyisocyanate and the catalyst under stirring to obtain the liquid polyether polyurethane prepolymer base material for later use; 2. adding the plasticizer and the coupling agent to the liquid polyether polyurethane prepolymer base material to obtain a mixture; and 3. adding the super water absorbent resin and other fillers to the mixture, then adding the catalyst and the adjuvant, evenly dispersing into paste, and then packing the paste into a packaging substance for sealing. The sealant of the invention has good adhesive property on a sealed surface, and the paste is cured under a moisture condition, thus achieving the purpose of avoiding leakage.

The invention relates to polyurethane sponge, in particular to slow-rebound polyether polyurethane sponge, which comprises, by weight, 20-85 parts of first polyhydric alcohol, 10-90 parts of second polyhydric alcohol, 8-30 parts of MDI (diphenylmethane diisocyanate), foaming agent, catalyst, surface active agent, flame retardant and 0.2-0.8 part of silicon rubber toughening agent, wherein the first polyhydric alcohol refers to polymer of ethylene glycol and propylene glycol, the degree of functionality of the first polyhydric alcohol is 3, and the hydroxyl value of the first polyhydric alcohol is 45-99mgKOH/g; and the second polyhydric alcohol refers to copolymerized polyol of trimethylolpropane and epoxy butane, the EO (ethylene oxide) content of the second polyhydric alcohol is higher than 60%, and the hydroxyl value of the second polyhydric alcohol is 3-22mgKOH/g. The slow-rebound polyether polyurethane sponge is slow in rebound time, proper in hardness and less susceptible to temperature.

In one embodiment, the invention is an composition comprising: a) one or more isocyanate functional polyether polyurethane prepolymers; and b) one or more prepolymers of one or more polyisocyanates and one or more polyesters wherein the terminal groups on the polyester polyol polyurethane prepolymer are the residue of a monofunctional polyalkylene glycol (hereinafter capped polyester polyurethane prepolymer) or one or more polyester polyols which are capped with the residue of one or more monofunctional isocyanates (hereinafter isocyanate capped polyesters); wherein the composition is a low viscous paste at temperature of from about 40 to about 80° C. and is high viscous paste at a temperature of from about 40° C. or less. In a preferred embodiment the composition further comprises c) one or more catalysts for the reaction of isocyanate moieties with hydroxyl groups. In another embodiment the invention is a method of bonding two or more substrates together which comprise contacting the two or more substrates together with a composition according to this invention disposed along at least a portion of the area wherein the substrates are in contact wherein the composition is a low viscous paste. In a preferred embodiment the composition is heated to about 40° C. to about 80° C. and converted to a low viscous paste prior to contacting it with the one or more substrates.

A filler material in the form of a cartridge insert is positionable within an apparatus for generating and injecting a foamed polymeric resin formed by the mixture of a plurality of foam-producing ingredients wherein the apparatus includes an elongate foaming chamber having an interior through which two mixable foam-producing ingredients are conducted. The filler material includes a body of polyurethane foam which is adapted to be accepted by and substantially fill the interior of the foaming chamber for enhancing the blend of the mixable foam-producing ingredients as the mixable foam-producing ingredients are conducted through the foaming chamber. Preferably, the polyurethane foam of the body is a polyether polyurethane foam, possesses an Indentation Force Deflection value which is at least as great as 30 pounds per 50 square inches (30 lbs/50 in²) and possesses a density which is between within the range of between 1.0 lbs/ft³ and 5.0 lbs/ft³.

The invention relates to a low viscosity UV/moisture dual-curing polyurethane hot melt adhesive and a preparation method thereof, belonging to the technical field of photocuring adhesives. The low viscosity UV/moisture dual-curing polyurethane hot melt adhesive comprises the following components in parts by weight: 95-97 parts of UV/moisture dual-curing polyester polyether polyurethane, 1-3 partsof free radical photoinitiator, 0.25-2 parts of cationic photoinitiator, 0.25-1 part of photosensitizer, 0.06-0.35 part of polyurethane catalyst, 0.01-0.02 part of water reducing agent, and 0.05-0.2 part of antioxidant. The hot melt adhesive can be used for the bonding of opaque substrates. The viscosity of the adhesive at the sizing temperature 110 DEG C is in the range of 2000-2500 mPa.s, the viscosity is low, the construction is convenient, the initial viscosity is strong, the positioning is fast, the holding time is shortened, even the holding pressure is not needed. The hot melt adhesivedoes not contain small molecular active diluent and is environmentally friendly. The preparation process is simple, easy to operate and suitable for industrial production.

A thermoplastic polyether polyurethane having high moisture vapor transmission, high melting point and static dissipative properties is disclosed. The thermoplastic polyether polyurethane is prepared by reacting a hydroxyl terminated polyether intermediate, an aromatic chain extender glycol, and a polyisocyanate. The weight proportions of the reactants used to make the TPU satisfy the equation of $\left(a\right)=\frac{\mathrm{wt}.\mathrm{of}\mathrm{hydroxyl}\mathrm{terminated}\mathrm{polyether}\mathrm{intermediate}}{\mathrm{wt}.\mathrm{of}\mathrm{polyisocyanate}+\mathrm{wt}.\mathrm{of}\mathrm{aromatic}\mathrm{chain}\mathrm{extender}}=1.6\pm 0.4$

The polymers formed are useful for melt-spun fibers, fabric coatings for breathable garments, house wrap, roofing membranes, and other applications requiring high vapor transmission and high melting points.