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Waterborne polyurethane: A new type of polyurethane system using water instead of organic solvent as dispersion medium, also known as water dispersed polyurethane, water polyurethane or water based polyurethane. Oily polyurethane: polyurethane system with organic solvent as dispersion medium, polyurethane system with thermoplastic linear structure. Distinguish by appearance Waterborne polyurethane...
Water based polyurethane is a kind of block copolymer containing soft segment and hard segment. The soft segment is composed of oligomer polyols, and the hard segment is composed of polyisocyanate and chain extender. It has excellent wear resistance, oil resistance, low temperature resistance, aging resistance and chemical resistance.At present, the water based polyurethane emulsion on the market ...
Polyurethane (polyurethanes, abbreviated PU) is a kind of polymer with -NHCOO-repeat structural unit as the main chain. Isocyanate (monomer) is polymerized with a hydroxyl compound.Due to the strong polarity of the carbamate group, insoluble in non-polar groups, with good oil resistance, toughness, wear resistance, aging resistance and adhesion. Materials suitable for a wide temperature range (-50...
What is a peelable resin? Strippable resin is a special resin material with strippable properties (also known as removable film resin). It is often used in the preparation of protective films for electronic products, packaging of semiconductor devices, etc., which can protect these products more intact, and it is easy to peel off when it needs to be replaced or disassembled. When prepari...
There are several main reasons for water-based emulsion breaking: 1.Large temperature changes, water-based emulsion is easy to separate into water phase and oil phase at high temperature, and easy to crystallize at low temperature. 2.The selection of emulsifier is improper, and the type and dosage of emulsifier are different, which has a great impact on the stability of emulsification. The choice ...
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 containin...
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 sol...
Compared with natural latex, the commonality of synthetic latex lies in its excellent storage stability, mechanical stability, chemical stability and freeze-thaw stability during storage and application. The characteristics of different kinds of synthetic latex are as follows: Styrene-butadiene latex Butadiene series latex is a copolymer latex synthesized mainly by butadiene and styrene monomer. B...
Styrene-butadiene rubber latex is a kind of copolymer emulsion obtained by emulsion polymerization with butadiene and styrene as monomers or main monomers. Ordinary styrene butadiene latex Carboxylic butadiene-styrene latex Bufedipine latex There are many varieties of styrene-butadiene latex, according to the different types of raw materials can be divided into ordinary styrene-butadiene late...
This product uses butadiene, Acrylonitrile as the main raw materials, through emulsion polymerization of anionic polymer dispersion, can be used to produce disposable medical examination gloves, with excellent elongation and tensile strength The product is an environmentally friendly product, free of formaldehyde, APEO, NPEO and other harmful substances, and has excellent elongation, tensile stren...
Glove PU coating refers to coating the outer layer of gloves with a layer of polyurethane (PU) material. This coating has a variety of functions, mainly including: Oil and chemical resistance: makes the gloves suitable for work environments where oils and chemicals need to be handled. Anti-slip and wear resistance: Enhances the stability of the gloves in wet or greasy environments, reduces the ris...
Acrylic emulsion has been widely used in various fields of coating industry because of its diversity, versatility and weather resistance.Waterborne acrylic emulsion is the emulsion polymerization of vinyl monomer based on acrylic monomer. In the polymerization process, emulsifier, stabilizer, pH regulator and other additives are added, and the system is complicated Sinograce Chemical launched...
Particle size and hydrolysis resistance: The stability of the emulsion is closely related to the particle size and hydrolysis resistance of the polyurethane particles. The smaller the particle size, the better the stability of the emulsion. The poor hydrolysis resistance will cause the emulsion to degrade slowly during the storage process, produce carboxyl group, reduce pH value, and make the emul...
The world's coating variety structure is developing in the direction of reducing VOC, and water-based coating is one of the development directions. The proportion of traditional solvent-based coatings in China has gradually declined, and the development speed of water-based coatings is also very fast, but the low-grade varieties of polyvinyl alcohol still account for a large proportion. When choos...
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Sinograce Chemical is professional technical enterprise providing solutions of surface materials and manufacturing of raw materials. Sinograce Chemical Company is composed of R&D center, Manufacture center, Quality control department, Market center and International trade department. We have been dedicating to research on excellent paint/coating, adhesive for over 15 years. And now still conti...
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