45results about How to "Does not cause degradation" patented technology

The invention relates to a composition suitable for topical application comprising water, dimethyl isosorbide, a polyol and a phenolic or polyphenolic antioxidant. A method for producing the composition is also part of the invention, as is a kit for making the composition. Optionally, the phenolic or polyphenolic antioxidant is provided in the form of a lyophilisate for the method and the kit. Theuse of the composition for a treatment by topical application is also within the scope of the invention.

A medicament and a dosing method for controlling the running corrosion of an air-cooling system in a thermal power plant, the medicament includes 1% to 10% N, N-dimethylethanolamine, 0% to 10% 3-diethylaminopropylamine, 1% to 10 %Triethanolamine, 0%~10% diethanolamine, 1%~10% ethanolamine, 1%~10% methoxypropylamine, 1%~10% diisopropylamine, 0%~10% hexamethylene tetra Amine, 0% to 10% N-(2-aminoethyl) morpholine and 1% to 10% hydrazine are at least six of the ten kinds of medicaments, and the balance is deionized water, which is prepared into a solution by deionized water; Adding a concentration of 0.3mg / L to 1.5mg / L can effectively control the corrosion of the air-cooling system, and has no effect on the performance of the condensate demineralization resin. Long-term operation under conditions.

The invention provides a plastic product and a preparation method thereof. The method comprises the following steps: 1) forming a plastic base, wherein the plastic base contains chemically plated catalysts which are compounds shown in the formula I, II or III; 2) removing the plastics in the selected area on the surface of the plastic base and exposing the chemically plated catalysts in the corresponding area; and 3) chemically plating copper or nickel and continuing chemical plating and / or electroplating at least once to form a metal layer on the surface of the plastic base. The preparation method provided by the invention has the advantages of simple process, low requirement for energy and low cost. In addition, the chemically plated catalysts are distributed in the plastic base, so theplating layer formed after chemical plating and the plastic base have very high adhesion.

The invention discloses anhydrous tubular metal hypophosphite and a preparation method thereof, and belongs to the technical fields of halogen-free flame retardants and preparation thereof. A molecular formula of the anhydrous tubular metal hypophosphite is M(H2PO2)n, wherein M is any one of Na, K, Ca, Mg, Al, Zn, Mn, Fe, La or Ce; n is 1, 2 or 3. The preparation method comprises the following steps of firstly dissolving a metal chloride, hypophosphorous acid and a surfactant into an organic solvent, then adding into a polytetrafluoroethylene reaction kettle, raising a temperature, reacting, and finally filtering and washing an obtained product. The anhydrous tubular metal hypophosphite provided by the invention has good heat stability, further, does not contain water, cannot cause the degradation of a macromolecular material in a processing process of modifying the macromolecular material, is of a tubular structure, and not only can be used for improving the flame retarding performance of the macromolecular material, but also can be used for ameliorating the mechanical performance of the macromolecular material; the preparation method is simple, and the anhydrous tubular metal hypophosphite is applicable to most macromolecular material, and has a wide market application prospect.

The invention relates to a cyclic aliphatic carbonate monomer with a triple bond side group, a preparation method and use thereof. 2-methyl-2-propargyl oxygen carbonyl trimethylene carbonate is synthesized from 2,2-dimethylolpropionic acid. The monomer can be used for ring-opening polymerization or ring-opening copolymerization with aliphatic cyclic ester monomer to obtain the aliphatic polycarbonate with triple bond side group or the copolymers of aliphatic polyester-carbonic ester. The polymers have advantages of the aliphatic polyester and carbonic ester, can be biodegradated. The degradation product is non-toxic. The polymers can be used for biomedical material.

The invention provides a preparation method of a plastic product and a plastic product. The method comprises steps of: 1) moulding a plastic matrix containing a chemical plating catalyst compound with a formula III; 2) removing plastic on a selected zone of the plastic matrix and exposing the chemical plating catalyst on a corresponding zone; 3) carrying out chemical copper facing or chemical nickel plating, continuing to carry out at least one time of chemical plating and / or electroplate to form a metal level on the plastic matrix surface. The preparation method provided by the invention has simple technology, low energy demand and low cost; besides, the chemical plating catalyst is distributed into the plastic matrix, so the coating formed after chemical plating has quite high bondingforce with the plastic matrix.