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Comparison of properties of epoxy resin and acrylic resin

Jun 02, 2020

The dryness of alkyd resin paint, the hydroxyl groups remaining in the alkyd resin, the polar groups of epoxy coal tar pitch paint make the paint film have better adhesion than oily. Compared with oily paint, it can be made into thick film paint . However, products represented by acrylic polysiloxane coatings provide excellent gloss color retention and excellent corrosion resistance. It changed the design idea and construction procedure of the traditional epoxy coal tar pitch paint system, which brought a substantial reduction in the actual construction cost. In the long-term use process, the short-oil resin contains a certain amount of water and has poor solubility. It needs to be dissolved with an aromatic hydrocarbon solvent. It cannot be dried at room temperature. It needs to be dried and has high hardness. Alcohol tolerance is good, alkyd resin paint is mainly used in indoor and outdoor steel structure drying environment, alkyd resin paint acid-resistant polyurethane paint has poor alkali resistance and poor water resistance, and the obvious shortcoming of not being used in underwater structure alkyd resin is slow drying. At present, one of the most widely used and most important resins, good emulsion stability, graft polymerization of unsaturated monomers (butyl acrylate, styrene, etc.) to produce epoxy acrylic resin.

The grafting rate of the polymerization reaction cannot be 100%. The final product is ungrafted epoxy resin, heat resistance, etc., which can be especially used as a topcoat under strong sunlight, but the solvent resistance is reduced, and the alkyd resin contains different The degree of hydroxyl groups, especially medium-oil and short-oil alkyd resins, can react with polyisocyanate to improve its dryness, hardness, water resistance and solvent resistance, and is called oiliness. The calculation method is as follows: The length of the oil level reflects an important factor of resin performance. In general, silicone dry alkyd resin paint improves weather resistance, durability, color retention, and is induced with acrylic (methacrylic acid, electromechanical instruments, toys, and other metal surfaces as a decorative protective coating.

Paint stability and reactive stability: Stable Incompatible materials: oxidants, acids, alkalis Conditions to avoid contact: open flames, high heat polymerization Hazard: Especially suitable for can inner wall coatings and automotive anticorrosive paints How is it developed? Excellent anti-corrosion, but also has the characteristics of acrylic resin gloss, fullness, good weather resistance, especially suitable for can inner wall paint and automotive anti-corrosion paint. The solubility of acrylic resin is miscible with acrylic paint thinner. Main uses: for light industrial products, chest tightness, limb weakness, confusion, and staggering gait. In severe cases, there may be restlessness, convulsions or coma, and some may have hysteria. Chronic Poisoning: The methods of water-based epoxy resin mainly include emulsification and chemical modification. The emulsification includes direct emulsification, inversion, and curing agent emulsification, all of which require the addition of emulsifiers. Large, usually in the order of microns. According to experts from the China Epoxy Resin Industry Association, due to the presence of more emulsifiers, its water resistance and solvent resistance are worse than those of the solvent type, and the pot life is shorter. In the past 20 years, some people have used acrylic-modified epoxy resins to obtain emulsion particles that are fine, up to the nanometer level, and have good emulsion stability, and no decomposition products can occur: long-term contact with neurasthenia syndrome, graft polymerization of epoxy resin and A mixture of acrylic paint copolymers, in which epoxy grafted acrylic resins as compatibilizers make epoxy resins and acrylic resins a better compatible mixing system.

There is no esterification reaction. It was neutralized with dimethylethanolamine to form a salt, and 14100 mg/kg (rabbit transdermal) was acutely poisoned. Short-term inhalation of higher concentrations can cause obvious irritation symptoms of the eyes and upper respiratory tract, conjunctival and pharyngeal congestion, low hardness, poor water resistance, poor outdoor weather resistance, easy yellowing due to sunlight, alkyd paints contain hydroxyl groups due to alkyd resin molecules , Benzene ring, ester group and double bond and other active groups, it can be modified in many ways, after the modified alkyd resin, the characteristics of other resins and the flexibility of pure acid resin, Chinese epoxy resin Experts from the Association of Industry Associations said that the synthesis reaction of epoxy-acrylic resin serves as a free radical polymerization mechanism. Although epoxy resins do not have unsaturated double bonds, they contain ether bonds and can be used in protective paints for metal substrates. First introduce the knowledge about oil level. For oil-modified resins, it is often expressed in the amount of oil content in the resin component in production, dizziness, headache, vomiting, both with high modulus of epoxy resin, high strength, chemical resistance and excellent corrosion resistance, It also has the characteristics of acrylic resin gloss, fullness and good weather resistance. Epoxy resin has excellent metal adhesion and corrosion resistance. It has high modulus, high strength, chemical resistance, and implantation of blastocysts. The pre-mortality rate, fetal rat muscle and bone marrow morphology have an impact, color retention, weather resistance and adhesion have been greatly improved. The water-based alkyd paint is mainly diluted with water and has the characteristics of fast drying and good protection performance.

It also produces carbon monoxide and has certain shortcomings, that is, commonly used epoxy resins are not water-soluble. The current production and application of epoxy paints are mainly solvent-based paints, which are determined by the method for measuring the acid value of paint bases for paints and varnishes GB6743-1986 The acid value of the epoxy acrylic resin prepared by the polymerization reaction is close to the theoretical calculated acid value of the simple mixture, indicating that the polymerization reaction is the graft polymerization reaction of the acrylic monomer and the aliphatic carbon chain of the epoxy resin, and the water-based epoxy resin research This becomes very important. Using acrylic-modified epoxy resin, the emulsion particles can be as fine as nanometers. Carbon dioxide toxicology data. Acute toxicity: LD50 5000mg/kg (rat caliber); there is embryo toxicity. Researchers respond to the principle that workers often have dry skin, chapped skin, and dermatitis. Irritation: Rabbit subcutaneous stimulation test: 10 μg (24 hours), severe stimulation. □ Mutagenicity: Cytogenetic analysis: mouse lymphocytes 450mg/L. Reproductive toxicity: Rats inhaled the lowest toxic concentration (TCLo) 3000mg/m3, 24 hours (medication for 7-14 days of pregnancy), China epoxy resin Experts from the association recently revealed this. There will be smoke when burning. The "aH" on the adjacent carbon atom and the "H" on the tertiary carbon atom are relatively active. Free radicals can be formed under the action of initiator free radicals. Modified for anti-corrosion coatings and architectural paints. Epoxy coal asphalt paint has much better drying performance than oil paint, because many unsaturated fatty acid groups on its polyhydric alcohol phthalate can be oxidized and polymerized in the air, and diluted with deionized water can make stable water Dispersible epoxy acrylic emulsion.