Halogen-free flame-retardant unsaturated polyester resin and preparation method of the halogen-free flame-retardant unsaturated polyester resin

Abstract

The invention relates to the technical field of preparation of high molecular materials, particularly relates to halogen-free flame-retardant unsaturated polyester resin and a preparation method of the halogen-free flame-retardant unsaturated polyester resin. The halogen-free flame-retardant unsaturated polyester resin is prepared by the following steps: by esterification and polycondensation of organic polyatomic alcohol, saturated or unsaturated polybasic acid or acid anhydride, and reactive flame retardant, a polymer is formed; and the polymer is dissolved in styrene containing polymerization inhibitor and then mixed with additive flame retardant. The advantages are as follows: (1) the halogen-free flame-retardant unsaturated polyester resin consists of materials with low price and the preparation cost is low; (2) combing the comprehensive effects of the reactive flame retardant and the additive flame retardant, the polyester resin is superior to similar products in flame retarding effect in the market; and (3) the product does not contain halogen and is low in smoke and toxicity, and excellent in constructability and settlement resistance. The halogen-free flame-retardant unsaturated polyester resin and the composite of the resin can be broadly applied to such products with high requirement for flame-retardant property as building materials, automobile parts and the like and especially applicable to such glass fiber reinforced plastic products with low-smoke and flame-retardant requirements as hand layup passenger trains.

Description

technical field [0001] The invention relates to the technical field of polymer material preparation, in particular to an unsaturated polyester resin used for halogen-free flame retardancy and a preparation method thereof. Background technique [0002] Unsaturated polyester resin glass fiber composite materials have excellent mechanical properties, low density, good chemical resistance and good surface quality, etc., and are used more and more in rail transit passenger cars, building materials and aerospace vehicles to replace traditional made from metal. [0003] In recent years, in response to the market's demand for composite materials in terms of mechanics, electricity and fire resistance, many new unsaturated resin varieties have been introduced, especially a lot of research has been done on fire-resistant and flame-retardant materials, such as a large number of used in the market The flame retardant resin is prepared from halogen-containing raw materials and then compo...

AI Technical Summary

Problems solved by technology

[0003] In recent years, in response to the market's demand for composite materials in terms of mechanics, electricity, and fire and flame retardancy, many new unsaturated resin varieties have been introduced, especially a lot of research has been done on fire and flame retardant materials, such as a large number of used in the market The flame-retardant resin is prepared from halogen-containing raw materials and then compounded with antimony trioxide. The halogen-containing raw materials include hexachloromethylene phthalic acid, tetrabromophthalic anhydride, dibromoneopentyl glycol, etc. The combustion effect is good, but it will release toxic fumes at high temperatures, which has great limitations in the use of public transportation and building materials

Aiming at the problem of toxic fumes, the improvement method is mainly on the use of phosphorus-containing compounds, nitrogen-containing compounds and the selection of inorganic fillers. For example, a large amount of aluminum hydroxide can be used to achieve halogen-free flame retardancy, but the addition of fillers will lead to the deterioration of the resin. The overall physical properties are affected, and the varieties and application methods of phosphorus or nitrogen-containing compounds need to be further deepened