11 results about "Polyaziridine" patented technology

The invention relates to the use of aqueous dispersions for producing storage-stable and latent-reactive adhesives, said aqueous dispersions containing at least the following dispersion components: (A) at least one carboxyl group-containing semi-crystalline or crystalline polyurethane polymer having a melting temperature of 35 to 80 DEG C, an enthalpy of fusion of > = 15 J / g and a meta-acid value of 0.8 to 25 mg KOH / g; (B) at least one polycarbodiimide, at least one polyaziridine and / or mixtures thereof, wherein the at least one polycarbodiimide and the at least one polyaziridine have a glass transition temperature in the range of-150 DEG C to 30 DEG C; (C) optionally, at least one additional polymer different from the at least one polymer (A); and (D) optionally, at least one additive different from components (A), (B) and (C). Furthermore, a method and an adhesive bond for bonding at least two substrates or at least two surface regions of a substrate are provided.

The invention relates to an aqueous adhesive formulation in the form of an aqueous dispersion containing at least the following dispersed components: (A) at least one polymer selected from the group consisting of polyurethane polymers, vinyl polymers, polyester polymers and / or mixtures of at least two thereof; the present invention relates to a polymer having lt as determined according to DIN EN ISO 2114: 2000 (2002-06, method A, using an acetone-ethanol solvent mixture); a partial acid value of 1.25 mg KOH / g; (B) at least one semi-crystalline or crystalline carboxyl group-containing polyurethane polymer having a melting temperature of 35 to 80 DEG C, an enthalpy of fusion of > = 15 J / g, each determined by differential scanning calorimetry (DSC) according to DIN EN ISO 11357-1: 2017 (2017-02) at a heating rate of 20 K / min, and having a partial acid value of 1.25 mg KOH / g to 25 mg KOH / g determined according to DIN EN ISO 2114: 2000 (2002-06, method A, using an acetone-ethanol solvent mixture); (C) at least one polycarbodiimide and / or at least one polyaziridine and / or mixtures thereof; and (D) optionally, at least one additional polymer different from the at least one polymer (A) and the at least one polyurethane polymer (B). The invention relates to an aqueous adhesive formulation, further to a corresponding kit, to a method for producing said aqueous adhesive formulation, to the use of said adhesive formulation and to articles produced using said adhesive formulation.

Casing compositions including carboxyl groups, cover compositions including nucleophile groups and an adhesion promoter capable of crosslinking carboxyl and nucleophile groups, and golf balls made from such compositions that have crosslinks between carboxyl groups in the casing composition and nucleophile groups in the cover composition. The nucleophile groups may be hydroxyl groups, amino groups, or other types of nucleophile groups. The adhesion promoter may be a polyaziridine. An acid catalyst may be used to facilitate the reaction between the nucleophile groups in the cover composition and the adhesion promoter. The type and concentration of the components in the casing and cover compositions, including the adhesion promoter, affect the adhesion between golf balls having components made from such compositions and, thus, can be used to produce a golf ball having increased durability.

The invention discloses water-based finish paint with high shakeout performance. The water-based finish paint is prepared from the following raw materials in percentage by weight: 30-50% of water-soluble polyester resin, 5-15% of a cross-linking agent, 6-12% of fluff powder, 1-5% of a functional aid, 5-10% of a cosolvent and the balance of deionized water. The water-soluble polyester resin with the acid value of 30-45mgKOH / g is matched with the closed polyaziridine, so that the balance of hardness and flexibility of a paint film can be ensured, and the adhesive force and the wear resistance are improved. The ultra-high shakeout wear resistance of 52-66 L can be achieved by adopting the thickness of 5-8 microns, and the technical prejudice that high wear resistance can be guaranteed only through a thick paint film in the industry is broken through. The shakeout performance is improved from the two dimensions of wear resistance and wear reduction, and high wear resistance under an ultrathin paint film is achieved.

This invention relates to the field of conveying materials technology, specifically disclosing an antistatic elastic belt for the photovoltaic industry and its preparation method; including the following steps: S1: Take silicone rubber microparticles and polyurethane, mix them evenly, heat and pressurize, and extrude to obtain a conveying surface with a thickness of 0.4-0.5 mm; S2: Prepare a skeleton layer: the skeleton layer is woven by warp and weft threads, wherein the weft thread is a single polyurethane-coated filament, and the warp thread is obtained by twisting a single metal wire and a single polyurethane-coated filament; S3: Add an aqueous solution of polyazidopropylidin crosslinking agent dropwise to carboxylated nitrile rubber latex, add polypyrrole-modified silica, stir to obtain a conductive and wear-resistant slurry, coat it on one side of the skeleton layer, dry it, and the coating thickness is 0.3-0.4 mm; take the conveying surface, attach it to the side of the skeleton layer that is not coated with the conductive and wear-resistant slurry, hot press, and cool to obtain an antistatic elastic belt.

Primer layers for adhesion of a pressure sensitive adhesive material to a substrate are provided. The primer layer comprises a crosslinked polymer. In some embodiments, the primer layer has an atomic nitrogen content of greater than 6 wt %, and in some a ratio of atomic weight percent of oxygen to nitrogen of less than 3.0. In some embodiments the crosslinked polymer is the reaction product of an amine-functional base polymer such as a polyethylenimine (PEI) and a crosslinker, which may be a polyaziridine crosslinker. Also provided are two-layer constructions comprising the primer layer and a substrate layer; and tapes, such as flexographic plate mounting tapes, comprising the two-layer construction and a pressure sensitive adhesive layer.

The present invention relates to a method for coating the lumen of a tube using fluid displacement techniques. In some embodiments, the method involves introducing a first coating solution into the lumen of the tube using a positive or negative displacement, draining the excess solution to leave a film on the inner surface, and curing the film to form a uniform coating. In some embodiments, the displacement system can include a piston pump, peristaltic pump, and / or syringe. In some embodiments, a first coating solution may comprise a mixture of polyaziridine and either polyurethane or polyacrylate, while a second coating solution may comprise polysaccharide and / or polyacrylic acid and may be hydrophilic. Additional steps may include applying multiple layers, coating both the inner and outer surfaces of the tube, and / or using gas to drain the coating solution. In some embodiments, multiple tubes can be coated simultaneously using a manifold assembly.

A two part polyurethane system is provided. The system comprises a resin and a cross-linking agent component. The resin has units obtained from a polyol and a polyisocyanate. The polyol has free carboxyl groups and 0.5 wt% to 3 wt% free hydroxyl groups. The polyisocyanate has-NCO groups that are reactive with the free hydroxyl groups of the polyol in an amount that provides a molar ratio of-NCO / -OH of 0.1 to 0.3 such that the resin formed contains a minimum of free hydroxyl groups and sufficient free carboxyl groups to provide an acidity of 5 mg KOH / g to 50 mg KOH / g. The crosslinker component includes a carbodiimide compound, a polyaziridine compound, or a combination thereof. The crosslinker component is configured to react with free carboxyl groups of the resin to form a cured polyurethane coating.

Multifunctional crosslinkers are a reaction product between a polyaziridine compound and two or more functionalized benzophenones. The polyaziridine compound is linked to the functionalized benzophenones through two or more reacted aziridine groups. Coating compositions, comprising: a polymer, and multifunctional crosslinkers. Coated medical devices, comprise a lubricious coating bonded adjacent to an exterior surface of the medical device. The lubricious coating is prepared by UV-curing a coating composition, wherein the coating composition comprises: a water / isopropyl alcohol (IPA) soluble polymer and / or a UV-curable polymer, and a water / IPA soluble multifunctional crosslinker.

This invention discloses a protein adhesive, its preparation method, and its application. The preparation method includes the following steps: S1, mixing protein from cake meal, alkali, and water to react in reaction I to obtain intermediate I; mixing nano-inorganic minerals, bis-(3-(triethoxysilane)propyl)-tetrasulfide, and water to react in reaction II, followed by solid-liquid separation to obtain intermediate II; S2, mixing intermediate I, intermediate II, polyaziridine polymer, and 4-dimethylaminopyridine to react in reaction III to obtain intermediate III; S3, mixing intermediate III, sulfur, and a surfactant to obtain the protein adhesive. The protein adhesive prepared by the method of this invention exhibits high mechanical properties, flame retardant properties, and water resistance.

The application relates to the field of decorative articles, in particular to a flow sand oil with universality for decoration and a preparation method and application thereof. The flow sand oil with universality for decoration comprises the following components in parts by weight: 85-95 parts of white oil, 3-8 parts of polyaziridine crosslinking agent, 2-3 parts of thickening agent, 0.05-0.2 parts of ultraviolet absorber, 1.2-1.5 parts of antioxidant 1010, 0.1-0.5 parts of benzotriazole and 0.1-0.3 parts of phosphate ester corrosion inhibitor; the thickening agent comprises at least one of fumed silica and organic bentonite. Firstly, the rheological synergy between the thickening agent and the white oil is realized, so that the flow sand oil with universality for decoration is difficult to adhere to the wall; the white oil itself is difficult to corrode the metal / plastic decoration; the addition of the fumed silica / bentonite also reduces the direct contact area with the oil body; the mutual cooperation among the antioxidant 1010, the ultraviolet absorber and the thickening agent reduces the free radical content and the light intensity, thereby prolonging the service life.