Liquid end hydroxyl polybutadiene rubber (HTPB) is a liquid rubber with hydroxyl functional group at the end of the molecular chain of polybutadiene, which is colorless or light yellow transparent liquid at room temperature. HTPB and chain extender, polyisocyanate cross-linking agent in the reaction at room temperature or high temperature can generate three-dimensional network structure of the solidified material, the solidified material has excellent mechanical properties, good transparency, especially has excellent hydrolysis resistance, acid and alkali resistance, wear resistance, low temperature resistance and excellent electrical insulation, good adhesion to non-polar and low polar materials, excellent air tightness. The moisture transmittance is very low. HTPB has a wide range of applications. For a long time, it is mainly used in the manufacture of adhesives for solid propellants. In recent years, it has been gradually promoted for the production of civil cast-type polyurethane elasteers, RIM polyurethane products and CASE polyurethane elastic materials. Due to the excellent electrical properties of HTPB, water resistance, corrosion resistance and dimensional stability, it is also used for the production of complex shape insulating materials by the casting method. The main application fields of HTPB include pouring tires, rubber and plastic floor, plastic runway and complex shaped rubber products, shoe materials, special foam plastics, special coatings, adhesives, potting materials, electrical insulating packaging materials, waterproof and anti-corrosion materials, underwater sealing materials, wear-resistant transport belt and other rubber modification and epoxy resin modification and other uses.

The commonly used resins for waterborne wood paint are polyurethane and acrylic acid. Waterborne polyurethane resin is a wear-resistant resin commonly used in waterborne wood paint, which can form a hard, wear-resistant coating to provide good protection for wood.The commonly used resins for waterborne wood paint are polyurethane and acrylic acid. Waterborne polyurethane resin is a wear-resistant resin commonly used in waterborne wood paint, which can form a hard, wear-resistant coating to provide good protection for wood.Another common water-based wood paint resin is acrylic. It has good weather resistance, wear resistance and chemical resistance to form a strong and durable coating. The drying time of acrylic resin is shorter, the transparency is higher, and the natural color of wood can be maintained. First, waterborne wood paint self-extinction polyurethane resin Application fields Waterborne wood varnish varnish Waterborne wood paint solid color paint Wood surface treatment Product feature Good scratch resistance (such as scratch repair) Good color rendering Feel smooth or strong velvet Environmental protection Good adhesion to oil bottom Low gloss (near 0 degree light) Two, water-based wood paint self-extinction acrylic resin Application fields Waterborne wood paint full matte solid color paint (substitute matte powder dosage) Wood surface treatment Product feature High efficiency extinction Scratch resistance It does not absorb water or oil Environmental protection Rheology can be good High transparency Anti-tack Good stain resistance Self-extinction acrylic resin Self-extinction acrylic resin is a special process matte acrylic dispersion, with very good extinction effect and very good high temperature resistance. Water based polyurethane resin and water based acrylic resin have their own advantages in waterborne wood paint. Polyurethane resins offer increased wear and chemical resistance for applications that require greater protection. Acrylic resin has a faster drying time and good transparency, suitable for retaining the natural beauty of wood. When selecting water-based wood paint resin, it is necessary to choose according to the specific needs and application scenarios, and you can also directly contact Sinograce Chemical technical engineers for recommendation.

The difference between nitrile rubber and nitrile latex Different raw materials Carboxyl nitrile latex: butadiene, acrylonitrile and methacrylic acid Carboxyl nitrile butadiene latex (XNBRL) is a terpolymer of butadiene, acrylonitrile and acrylic acid or methacrylic acid, and is a modified variety of nitrile butadiene latex. Due to the introduction of carboxyl group, while containing C=C double bonds, sulfur vulcanization, peroxide vulcanization and other ways, so as to obtain a variety of excellent properties, and better than ordinary nitrile latex. Its products have excellent oil resistance, chemical resistance and mechanical properties, widely used in a variety of rubber and non-rubber products. The introduction of carboxyl group enhances the polarity and stability of XNBRL, improves the hardness and strength of XNBRL film, and XNBRL does not contain protein, does not cause human allergy, and is preferred for the manufacture of oil-resistant gloves and medical gloves. Nitrile rubber: butadiene and acrylonitrile Nitrile rubber is made of butadiene and acrylonitrile by emulsion polymerization.  Nitrile rubber is mainly produced by low temperature emulsion polymerization. It has excellent oil resistance, high wear resistance, good heat resistance and strong adhesion. Its disadvantages are poor low temperature resistance, poor ozone resistance, poor insulation performance, and slightly lower elasticity. Different shape Nitrile rubber is in the form of blocks. Carboxyl nitrile latex is a milky liquid Different uses Nitrile rubber: Nitrile rubber is mainly downstream for foam products, rubber hose tape, seals and other fields. Carboxyl nitrile butadiene latex: The main downstream of carboxyl nitrile butadiene latex is labor protection gloves or disposable gloves. Price is different The price gap between the two is relatively large

Waterborne polyurethane is the abbreviation of polyurethane (polyurethane), usually defined as a polymer compound containing repeated polyurethane bond structural units NH, CO, O on the main chain of the polymer chain, called waterborne polyurethane. Its structure is Co-NH - R - NH - CO - O - R - O, usually by binary or polyisocyanate and containing two or more active hydrogen compounds through the gradual polymerization reaction polymerization. In addition to the formation of carbamate groups, urea, biuret and other groups are also formed. Therefore, in a general sense, waterborne polyurethanes are adducts of isocyanates. In the specific synthesis, according to the difference in the number of functional groups of the commonly used raw materials, the water-based polyurethane resin can be made into a linear structure or a body structure, and the properties and uses of the obtained water-based polyurethane emulsion are different. Characteristics of waterborne polyurethane High elasticity, cost-effective Easy to use, easy to modify Safe and non-toxic, not easy to burn, strong adhesion, high and low temperature resistance, easy storage and storage Application of waterborne polyurethane Textile industry Because the permeability of WPU is much smaller than that of solvent-based polyurethane, it can be used as a finishing agent on thin layer fabrics to maintain the softness of the fabric, improve the dyeing depth, fastness, and improve the wear resistance, wrinkle resistance, resilience, water resistance, heat resistance and washing resistance of the fabric. Automobile industry In the automotive industry, WPU coatings are widely used in car body parts, interior and exterior trim parts, especially in various plastic parts, coatings used in body surface coating (that is, automotive paint) and repair paint for body repair, etc., which can significantly reduce VOC emissions. Woodwork Another major application area of WPU paint is wood paint, which is not only flexible, wear resistant, low temperature film forming and fullness, but also has high strength and no adhesion. Construction industry Architectural coatings may be one of the largest application areas of WPU coatings in the future, especially when mixed with acrylic emulsions, which can meet the requirements of architectural coatings for elasticity, stain resistance, weather resistance and reasonable cost. Coating industry Common waterborne polyurethane coatings are flammable in the air, which has great safety risks, and poor water resistance, and limited application fields. Waterborne polyurethane coatings with special properties, such as flame retardant, anticorrosive, waterproof and mildew proof, have been developed to expand their application range. In addition to the above functional waterborne polyurethane coatings, researchers have developed functional waterborne polyurethane coatings such as conductivity, environmental protection, shock absorption, biodegradation and self-healing according to ...