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From the choice of use, it is good to choose a resin with medium epoxy value (such as; When making castables, it is good to choose resins with high epoxy value (>, such as; For coatings, low epoxy value (such as etc.) is generally used for coatings. 1. Choose from the mechanical strength of the resin with high epoxy value is stronger, but more brittle; The strength is good at high and low temperatures with medium epoxy value; Those with low epoxy value have worse strength at high temperatures. Because the strength is related to the size of the cross-linking, the cross-linking degree is also high after curing with a high epoxy value, and the cross-linking degree is also low after curing with a low epoxy value, so it causes a difference in strength.
2. Choose from the operation requirements No need to resist high temperature, the strength requirements are not large, and it is hoped that the epoxy resin can dry quickly and is not easy to be lost
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Good evening, the cheapest and most instant diluent for commonly used thermoplastic acrylic resins can choose dichloromethane, or dimethyl carbonate: ethyl acetate butyl acetate = 3:1,9570 dichloromethane is the best, it dissolves very quickly, and the enhanced dissolution can be done with dichloromethane:
Ethyl acetate = 1:1 if you don't care about cost. Methylene chloride has good performance, and it is very low toxicity and non-flammable, non-explosive and has excellent safety, dilute it at the temperature of your reactor should not exceed 30 degrees, pay attention to the volatile boiling point.
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There are many types of acrylic resin paint, first look at which kind of acrylic resin paint is on your product description. In the form of acrylic resin coatings, combined with other characteristics, it can be divided into solvent-based, including ordinary solvent-based acrylic resin coatings, high-solids coatings, and non-aqueous dispersion coatings (NAD); Resin coatings in water-based acrylic vertical sheds, including water-soluble coatings, water-based aerosol coatings, water-emulsion coatings, and water-based thick-build coatings; Solvent-free, including radiation-curing coatings, powder coatings. Although acrylic resin has many advantages, there are also disadvantages that need to be improved, such as the softening of Hexiao thermoplastic resin when exposed to heat and the poor physical properties of low-molecular-weight products.
Thermosetting resin has good physical properties due to its ability to further crosslink and increase its molecular weight, but its thermal curing temperature is generally high, otherwise crosslinking is not good. Therefore, if it is solvent-based, ethyl acetate is generally used, and water-soluble can be diluted with water.
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First of all, a brief introduction to the type of crown brand acrylic resin paint:
Solvent-based, including general solvent-based acrylic resin coatings, high-solids coatings, and non-aqueous dispersion coatings (NAD);
Water-based acrylic resin coatings, including water-soluble coatings, hydrosol coatings, water-emulsion coatings, and water-based high-build coatings;
Solvent-free, including radiation-curing coatings, powder coatings.
The solvent-based diluent is ethanol acetate, while the water-soluble diluent uses water.
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First of all, a brief introduction to the type of crown brand acrylic resin paint:
Solvent-based, including general solvent-based acrylic resin coatings, high-solids coatings, and non-aqueous dispersion coatings (NAD);
Water-based acrylic resin coatings, including water-soluble coatings, hydrosol coatings, water-emulsion coatings, and water-based high-build coatings;
Solvent-free, including radiation-curing coatings, powder coatings.
The solvent-based diluent is ethanol acetate, while the water-soluble diluent uses water.
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First of all, a brief introduction to the type of crown brand acrylic resin paint:
Solvent-based, including general solvent-based acrylic resin coatings, high-solids coatings, and non-aqueous dispersion coatings (NAD);
Water-based acrylic resin coatings, including water-soluble coatings, hydrosol coatings, water-emulsion coatings, and water-based high-build coatings;
Solvent-free, including radiation-curing coatings, powder coatings.
The solvent-based diluent is ethanol acetate, while the water-soluble diluent uses water.
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Acrylic resin (acrylic resin) is a general term for homopolymers and copolymers of (methaic) acrylic acid and derivatives, homopolymers include: poly(meth)acrylic acid and its salts, poly(meth)acrylate, butyl ester, polyacrylamide, polyacrylonitrile, etc., and different monomers and proportions can be selected for different uses to obtain more copolymer species. Acrylic resin in the narrow sense mainly refers to polymethacrylic acid and its salts, which is a polyelectrolyte, and its properties are affected by the pH value.
Different polymerization methods can obtain different forms of resins such as solid, solution, and latex. Suitable for a variety of purposes.
The performance of the paint film is relatively good, if it is a hydroxyl reaction; The film-forming mechanism of light-curing acrylic resin is basically similar to that of thermosetting, which is commonly used in AC paint and PU paint (one of the main body resins of PU paint is a kind of hydroxy acrylic resin), as for thermosetting acrylic acid, it means that the acrylic resin reaction group is C=C, so the cross-linking density is small, depending on the other film-forming reaction group. Thermoplastic acrylic resin refers to the reaction group of the resin film formation is hydroxyl group, that is, the olefin carbon double bond is broken to form a film, thermoplastic, and the thermosetting acrylic resin is currently divided into three categories, carboxyl groups and other groups, not thermocatalytic only, so the crosslinking density is very high, but 5000. Generally speaking, if the thermoplastic has a larger molecular weight, then it is thermoplastic. >>>More
The ** of epoxy resin glue is about dozens of yuan per kilogram, the cheap one is more than ten or twenty yuan, and the expensive one is one or two hundred yuan. Different types of epoxy resin adhesives are also different. As far as the category is concerned, the classification of epoxy resin has not yet been unified, generally according to the strength, heat resistance grade and characteristics of classification, the main varieties of epoxy resin have 16 kinds, including general glue, structural glue, temperature-resistant glue, low-temperature glue, underwater, wet surface glue, conductive glue, optical glue, spot welding glue, epoxy resin film, styrofoam, strain glue, soft material adhesive, sealant, special glue, cured glue, civil construction glue 16 kinds. >>>More
The acrylic resin glue drying exhaust gas is carbon dioxide.
It is recommended to choose a polymer dispersant, which has little impact on the subsequent process links and the gloss and water resistance of the coating. Coating additives, including substrate wetting agents, dispersants, defoamers, wetting leveling agents; Its characteristics are as follows: Substrate wetting agent: >>>More
When choosing an epoxy adhesive, a number of factors should be considered. Here are some small experiences that I hope will help you. As a high-performance, high-value-added adhesive, epoxy resin adhesive is highly valued by the industry, but at the same time, counterfeit and shoddy products are often patronized. >>>More