Preparation method of unsaturated polyester resin for wood modification

Abstract

The invention relates to a preparation method of an unsaturated polyester resin for wood modification. The method comprises the following steps: A, sequentially adding maleic anhydride, phthalic anhydride and 1,2-propylene glycol into a three-mouth flask; B, stirring and rising temperature, rising the temperature of a reaction system to be about 150+ / -5 DEG C, and keeping the reaction temperature for about 6 hours; C, reducing the temperature of the reaction system to be 110-120 DEG C, adding styrene, keeping the temperature to be 90+ / -5 DEG C, continuously stirring for 0.5-1 hour and fully mixing; D, cooling to reach the room temperature and discharging to complete the preparation of the unsaturated polyester resin. The preparation method has the advantages of simpleness, high operability, security, reliability and the like; after the wood is subjected to dipping modification, a new way and a new range of the wood are widened.

Description

technical field [0001] The invention relates to a preparation method of unsaturated polyester resin, in particular to a preparation method of unsaturated polyester resin for wood modification. Background technique [0002] With the depletion of natural forest resources worldwide and the implementation of my country's natural forest protection project, fast-growing and high-yield forest timber in plantation forests has become the main species to alleviate or solve the contradiction between supply and demand of timber in my country. It has the characteristics of fast growth, high yield, and short harvesting cycle, resulting in a high proportion of juvenile wood in the wood, resulting in poor material, low density and surface hardness, which limits its application range. The wood modification method is an effective way to improve the physical and chemical properties of artificial fast-growing and high-yield forest wood. After treatment, the wood density, surface hardness, wear ...

AI Technical Summary

Problems solved by technology

At present, the unsaturated polyester molecules produced by the unsaturated polyester resin manufacturing method used are long-chain molecules before curing, and their molecular weight is generally 1000-3000. For wood impregnation, the spatial scale is large and cannot be used. impregnated into the interior of the wood

Relevant literature and data retrieval, such as Chinese patent 92101614.X "New method for preparing dicyclopentadiene modified unsaturated polyester", 95110573.6 "Unsaturated polyester resin for fishing rods", 96119856.7 "Modified unsaturated polyester A preparation method of resin", 99812357.9 "unsaturated polyester resin", 200410077507.3 "synthesis method of unsaturated polyester", 200510026882.X "preparation method of dicyclopentadiene modified unsaturated polyester resin", 200510089889.6 " A modified unsaturated polyester composite material and its preparation method", 200710191583.0 "unsaturated polyester resin", 200710023110.X "preparation method of unsaturated polyester resin", 200710051048.5 "thickening dicyclopentadiene unsaturated Preparation method of polyester resin", 200810134174.3 "Unsaturated polyester", 200810047166.3 "Synthesis method of unsaturated resin resin", 200910010356.2 "Unsaturated polyester resin for molding compound and its preparation method"; From the above-mentioned technical literature, the technical content of the preparation of similar unsaturated polyester resins has not been found

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