33results about How to "Fast cross-linking reaction" patented technology

Provided is a resin composition that can serve as a pressure-sensitive adhesive composition that is a material for forming a pressure-sensitive adhesive layer containing a polyurethane-based resin, the resin composition showing extremely high reactivity without any use of a tin compound as a catalyst, allowing a cross-linking reaction between a polyol and a polyfunctional isocyanate compound to rapidly progress, and being capable of providing a pressure-sensitive adhesive layer having high transparency. Also provided is a pressure-sensitive adhesive composition formed of such resin composition. Also provided is a pressure-sensitive adhesive layer having high transparency formed through the use of such pressure-sensitive adhesive composition. Also provided are a pressure-sensitive adhesive sheet and a surface protective film each including such pressure-sensitive adhesive layer. The resin composition includes: a polyol (A) having two or more OH groups; a polyfunctional isocyanate compound (B); and a catalyst (C), in which: the content ratio of the polyfunctional isocyanate compound (B) with respect to 100 parts by weight of the polyol (A) is 1 part by weight to 100 parts by weight; and the catalyst (C) includes an iron complex compound.

The invention discloses a preparation method of a functional polymer material, which belongs to the field of fiber material and plastic processing. The purpose of the present invention is to solve the disadvantages of low efficiency and high cost of functionalization of traditional polymer materials through blending and surface chemical grafting. The present invention acts on the functional material particles through an alternating electric field to physically embed them into the softened extrusion molding The surface of the polymer material substrate, and make the crosslinking group and the surface of the polymer material substrate realize chemical crosslinking and physical blending. After the polymer material substrate is cooled and solidified by cold wind or stretched, it will The functional polymer material can be obtained. The functional substances in the method of the present invention have a wide selection range, high utilization rate, good efficacy, less dosage, short material preparation process and high efficiency, and can be widely used in textile and garment industries, plastic industries, environmental governance and drug extraction, etc. field.

The invention discloses a preparation method of a monocomponent polyurethane flocking adhesive. The preparation method comprises the following sequential steps of: a. reacting isocyanate or isocyanate mixture A, mixture B of polyester polyol and polyether polyol containing at least two hydroxy groups, epoxy resin C, organic tin and organic amine catalysts D and a solvent E at the temperature of 60-120 DEG C for 1-6 hours to obtain polyurethane prepolymer; b. cooling to 40-60 DEG C, adding an isocyanate sealant F, and reacting for 1-4 hours; and c. controlling the temperature at 20-40 DEG C, and adding a low-molecular-weight chain extender G and an adhesion accelerant H. The polyurethane sol prepared by the method has the advantages of good adhesion to a rubber base material, excellent wear resistance and water resistance, and good opened standing performance and rapid curing performance.

Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof, wherein component A itself is single-component dealcoholization type silicon rubber and can offer a final strength value equal to the mixture of component A and component B, and has a good storage stability. The component B contains water, wherein the water can be directly added in free-state way and carried on the filler material; the component B also contains reactive polymer which can be activated by contacting with the catalyst of the component A, and perform quick cross-linking reaction with the cross-linking agent in the component A at the same time, the advantages of the invention are as follows: on one hand, the invention solves the shortcoming that the single-component silicon rubber has bigger reliance on the temperature and humidity of the environment; on the other hand, the invention accelerates the curing and reduces sensibility of the bi-component system to the mix error and measurement error at the same time. The ratios of the component A and component B in the bi-component system can vary in a large range without producing adverse effect to the final strength.

Provided is a resin composition that can serve as a pressure-sensitive adhesive composition that is a material for forming a pressure-sensitive adhesive layer containing a polyurethane-based resin, the resin composition having a sufficiently long pot life in a stage where the resin composition is stored as it is, while allowing a cross-linking reaction between a polyol and a polyfunctional isocyanate compound to rapidly progress upon formation of a pressure-sensitive adhesive layer through the use of a pressure-sensitive adhesive composition containing the resin composition. Also provided is a pressure-sensitive adhesive composition formed of such resin composition. Also provided is a pressure-sensitive adhesive layer formed through the use of such pressure-sensitive adhesive composition. Also provided are a pressure-sensitive adhesive sheet and a surface protective film each including such pressure-sensitive adhesive layer. The resin composition includes: a polyol (A) having at least two OH groups; a polyfunctional isocyanate compound (B); a catalyst (C); and a compound (D) that undergoes keto-enol tautomerization, in which: a content ratio of the polyfunctional isocyanate compound (B) with respect to 100 parts by weight of the polyol (A) is 1 part by weight to 100 parts by weight; and the catalyst (C) includes an iron-based compound containing iron as an active center thereof.

The invention discloses a chlorine-resistant peroxide crosslinked polyethylene tubular product and a preparation method thereof. By adding an acid remover, chlorine ions in water can be fully removed, so that a strong oxidation action on the plastic tubular product by chlorine ions in water is avoided, and the service life of the tubular product is prolonged; and by mixing two types of high density polyethylene resin, the two types of high polyethylene resin are complemented in performance and fully exert the excellent characteristics of the raw materials, so that the degree of crosslinking and the oxidation induction time of the tubular product can be taken into consideration at the same time. According to the preparation method, consumption of free radicals captured by an antioxidant is accelerated through high-temperature and high-speed production, so that the purposes of high degree of crosslinking and high chlorine-resistant performance are achieved. The peroxide crosslinked polyethylene tubular product disclosed by the invention can meet the demands on national standards GB / T 18992.2-2003 and Australian standards AS / NZS 2492:2007 at the same time, and has wide application prospects.

The invention discloses a preparation method of a low-pressure polymer decolorization nanofiltration membrane, which comprises the following steps: S1, taking a polymer, a copolymer, a porogen and a solvent, mixing it with a solvent to form a polymer solution, coating it on the surface of a nonwoven fabric, and forming a polymer solution. Washing to remove the solvent and porogen to obtain the blended polymer ultrafiltration membrane; S2, coating the surface of the blended polymer ultrafiltration membrane obtained in S1 with a polyamine solution for cross-linking reaction to form a nanofiltration separation layer; S3, applying S2 The obtained ultrafiltration membrane is obtained by heat treatment; the product and application thereof are also disclosed. The low-pressure polymer decolorization nanofiltration membrane of the present invention is resistant to oxidation, thin in thickness, does not fall off during use, and can efficiently separate multivalent ions and colored soluble organic substances. The membrane has good hydrophilicity, pollution resistance and permeation flux; In addition, the preparation method of the nanofiltration membrane has a simple process, can be produced in a large scale, and has good industrial application prospects.

A paint for the coiled insulating and anticorrosion material is prepared from special polyester resin, high etherified cross-linking resin and pigment, functional insulating filler, special chemical assistant and solvent through proportional mixing, dispersing, grinding, adding insulating filler, etc. Its advantages are no poison and pollution, high flame-retarding and insulating effect, and high resistance to ageing and corrosion.

The invention relates to and discloses a preparation method of a nanofiber / MOFs-based alcohol-preferential pervaporation membrane, and belongs to the technical field of membrane separation. Load MOFs on the nanofiber hydrogel film skeleton in situ to obtain a nanofiber / MOFs composite hydrogel film with uniformly dispersed MOFs particles, and then vacuum freeze-dry to obtain a nanofiber / MOFs hybrid airgel film; (3 ) Backfill the polymer matrix into the above gel membrane network and cross-link and solidify to obtain a nanofiber / MOFs-based pervaporation membrane with a high-loaded MOFs uniform distribution and alcohol-preferential pervaporation. For the first time, the strategy of pre-uniformly loading MOFs particles on the porous fiber gel skeleton as a "composite network filler" for pervaporation membranes, and then backfilling the polymer matrix and curing can effectively achieve high-load MOFs particles in the polymer matrix. The resulting mixed matrix membrane has excellent mechanical properties and efficient pervaporation performance, and has a good application prospect in the separation of ethanol / butanol and other bioalcohol mixed systems.