37results about How to "Viscosity does not decrease" patented technology

The invention relates to a water-based paint with high weatherability. The paint comprises the following raw materials by weight: 40-60 parts of a mixture of polyurethane resin and polystyrene-acrylate copolymer emulsion, 15-25 parts of kaolin, 0.5-3 parts of an iron series pigment, 0.1-0.8 part of borax, 0.5-2 parts of an anti-aging agent, 0.5-2 parts of antioxidant 3010, 0.5-3 parts of a defoaming agent HT6520, 0.1-3 parts of a dispersant, 0.1-1 part of an emulsifier, 0.1-1 part of ammonia, 5- 8 parts of PTFE and 25-50 parts of water; and the anti-aging agent is a mixture of a UV absorber UVP-327 and a light stabilizer 744 in a mixing proportion of 1-2:1. The invention mainly solves the technical problems of weak dispersion and weatherability of water-based paint in the prior art.

The invention relates to a preparation method of low-viscosity sodium carboxymethylcellulose; a sodium carboxymethylcellulose solution is heated to 50 DEG C by means of water bath and then is poured into a reaction vessel, and the pressure intensity in a Venturi tube is adjusted to 0.3 MPa by a pressure gauge; then the sodium carboxymethylcellulose solution in the reaction vessel is divided into two streams to be inputted into the Venturi tube from two opposite inlets by a material pump, and the two streams are knocked in the Venturi tube, then a knocking flow is generated and a cavitation effect is formed; the sodium carboxymethylcellulose solution after cavitation effect flows back to the reaction vessel from an outlet of the Venturi tube; and after the sodium carboxymethylcellulose solution in the reaction vessel is subjected to 30 min circulation cavitation reaction, a low-viscosity sodium carboxymethylcellulose solution is obtained. The preparation method has the advantages of simple equipment, energy saving, high efficiency, lower cost, no need to add strong oxidizing reagents, simple post-treatment operation and the like, and can achieve large-scale industrialized production.

A corrosion inhibitor for cleaning steering acid and its preparation method, under the pressure of 0.3-0.5Mpa, heterocyclic amine and benzyl chloride are added to the container at a molar ratio of (1-1.2): 1, and then isopropanol is added , then warming up to 120‑130°C, heat preservation reaction for 4‑6h, to obtain heterocyclic amine quaternary ammonium salt; in terms of mass percentage, 10‑15% of saturated fatty acid, 3‑5% of butynediol, 3‑5% of surfactant 5%, 45%-64% of solvent and 20%-30% of the main agent are evenly mixed to obtain a corrosion inhibitor for cleaning steering acid. The corrosion inhibitor for cleaning diverting acid of the present invention can have excellent protection for carbon steel oil pipes and equipment in the environment of cleaning diverting acid, and will not reduce the viscosity of the acid liquid system. During the acid fracturing operation, this product solves the corrosion problem of the clean steering acid system, achieves the purpose of protecting the tubing, and meets industry standards.

The invention provides a non-allergic rubber plaster and a preparation method thereof, belonging to the technical field of plaster preparations. The rubber plaster plaster disclosed by the present invention comprises the following medicinal materials in parts by weight: 1-7 parts of Speranthus fragrans, 5-14 parts of Radix Aconiti Radix, 5-13 parts of Radix Aconiti Radix, 5-13 parts of Radix Aconitum, 5 parts of Radix Aconitum ‑13 parts, 5‑15 parts of Aracea, 5‑13 parts of Millet, 2‑10 parts of menthol, 1‑8 parts of camphor and 2‑10 parts of borneol. The non-allergic rubber plaster plaster provided by the invention uses polymer artificial rubber instead of natural rubber, which effectively solves the problem of allergies. The obtained rubber plaster plaster has a high transdermal absorption rate, can make the active ingredients of the medicine absorb faster, improve the therapeutic effect, and simultaneously make the plaster have high bonding performance and high stability.

The invention relates to a thermally stable guar gum aqueous solution which comprises guar gum or derivatives of guar gum, water, a pH adjustor and an antioxidant, wherein the pH of the aqueous solution system ranges from 7 to 11 and the antioxidant is one of the following combinations: (1) sulfite and gallic acid; (2) sulfite and gallate; and (3) sulfite, gallic acid and gallate. At the temperature of 130 DEG C to 200 DEG C and under an air condition, the viscosity of the solution is still greater than 50MPa.S in two hours.

The invention provides an antistatic flexible polyurea composition and a preparation method, a construction method and an application thereof, which can solve the problem existing in the prior art that the antistatic property, the miscibility and the mechanical property of the polyurea elastomer are difficult to balance thereby resulting in the limited applied range. The invention has the technical schemes that an antistatic flexible polyurea composition is characterized in that the polyurea composition is composed of a component A and a component R; the component A is quasi-prepolymer which is synthesized by 30 to 50 portions of polyisocyanate, 20 to 40 portions of polyol and 10 to 30 portions of solid antistatic agents; the component R is composed of 5 to 30 portions of amine chain extenders, 40 to 60 portions of amine terminated polyether and 10 to 30 portions of antistatic agents; the components A, R are collated to use according to 1:1 of the isocyanate index. By the invention, not only the antistatic property of the polyurea elastomer is improved, but also the miscibility as well as the mechanical performance is integrally improved.

The invention discloses a self-adhesive polyurethane gel composite material. The self-adhesive polyurethane gel composite material is prepared from the following raw materials in parts by weight: 60 to 100 parts of a tripolymer, 2 to 20 parts of a curing agent and 2 to 25 parts of a plasticizer; the tripolymer is obtained by taking polyol, hexamethylene diisocyanate HDI and diphenyl-methane-diisocyanate MDI to react. The material is environment-friendly and has a high attaching property. The invention further provides a machining process of the self-adhesive polyurethane gel composite material; the machining process comprises the following steps: (1) heating the polyol, which is taken in parts by weight, to 50 DEG C to 70 DEG C; adding the diphenyl-methane-diisocyanate MDI, which is taken in parts by weight, to react for 20 minutes to 40 minutes; then adding the hexamethylene diisocyanate HDI which is taken in parts by weight; controlling the temperature to be 70 DEG C to 85 DEG C and reacting for 3 hours to 5 hours; standing for 20 hours to 48 hours and naturally cooling to finish the production of the tripolymer; (2) mixing three types of liquid-state substances including the tripolymer prepared by the step (1), and the curing agent and the plasticizer which are taken in parts by weight and stirring; leading a mixture into a mold, and heating and molding, wherein the temperature is selected in a range from 100 DEG C to 150 DEG C.

The invention discloses a safe use method for preparing a medical ultrasonic coupling agent sterile product, wherein the method comprises the following steps: S1, putting an unsterilized medical ultrasonic coupling agent material into a stainless steel barrel, and carrying out steam sterilization, wherein the formula of the medical ultrasonic coupling agent material comprises 0.5-1.5% of carbomer,3-5% of propylene glycol, 1-3% of glycerol, 1-2% of triethanolamine, and the balance being purified water; S2, after sterilization, cooling the medical ultrasonic coupling agent material to 25 DEG C-80 DEG C, and packaging, wherein a packaging bag is an aluminum composite film packaging bag, the aluminum composite film packaging bag is of a four-layer film structure, and four layers of films sequentially comprise a polyester layer, an aluminum foil layer, a polyamide or Kevlar layer and a polyethylene or polypropylene layer from outside to inside; and S3, after packaging is completed, carrying out terminal thermal sterilization. For facilitating the use of an operating table, a layer of specially-made paper-plastic bag is sleeved on an aluminum composite film packaging bag of a common sterile product, and then sterilization is carried out again. Compared with other methods, the safe use method is simple to operate, good in product quality and low in production cost.

The invention discloses a transfer substrate, a transfer method of a light-emitting diode, and a transfer device. The transfer substrate includes: a base, a reflective layer located on one side of the base, an optical conversion layer located on the side of the reflective layer away from the base, and a base located on the optical conversion layer. A light-sensitive anti-adhesion film on the side facing away from the reflective layer; an optical conversion layer for converting a certain wavelength range of light into non-visible light; a light-sensitive anti-adhesion film for bonding LEDs and reducing the viscosity to release the LEDs after exposure to non-visible light . Using the above-mentioned transfer substrate can complete the transfer and detection of the light-emitting diodes at the same time, and find and remove the abnormally luminous light-emitting diodes before the bonding process, avoiding the problems that the abnormally luminous light-emitting diodes are difficult to remove and the laser cutting process damages the array substrate. The transshipment process is simplified, and the yield and efficiency of transshipment are improved. In addition, there is no need to add an additional non-visible light source, the structure is simple, and the detection cost is low.