JPH0397708A - Resin composition having improved flame retardance and used for processing wood - Google Patents

Abstract

PURPOSE:To provide the subject composition composed of a resin prepared by reacting a bromine-containing epoxy resin with an unsaturated monobasic acid, etc., an unsaturated monomer, a phosphorus-containing plasticizer and a curing catalyst, readily fixed in wood, changing the wood into nonflammable wood and improving the dimensional stability and surface hardness of the wood. CONSTITUTION:The objective composition is composed of (A) a resin prepared by reacting a bromine-containing epoxy resin (e.g. tetrabromo bisphenol A type epoxy resin) with at least one basic acid selected from unsaturated monobasic acids [e.g. (meth)acrylic acid] and unsaturated dibasic acids (e.g. fumaric acid and itaconic acid), (B) an unsaturated monomer (e.g. styrene or vinyl styrene), (C) a phosphorus-containing plasticizer [e.g. preferably tris(chloroethyl) phosphate or a halogen-containing phosphate] and (D) a curing catalyst (e.g. benzoylperoxide).

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a resin composite for wood processing with improved flame retardancy. (Problems to be Solved by the Invention) Even if wood is sufficiently impregnated with resin, the impregnated material is dissolved B'. ．．
Prevent WIIm! l! In addition to improving flammability, this treatment also improves performance, such as increasing dimensional stability and surface hardness, without sacrificing the wood's sense of mass. (Means for Solving the Problems) The present inventors conducted various studies to solve the above problems, and as a result, they were able to solve the present invention. That is, the present invention (
A) Resin obtained by reacting a bromine-containing epoxy resin with at least one basic acid selected from unsaturated monobasic acids or unsaturated dibasic acids, (B) Unsaturated monomer, (C) Phosphorus-containing plastic It is something that The brome-containing epoxy resin used in the present invention is <1
) Tetrabromobisphenol A type epoxy resin, (2
) Reaction product of tetrabromo bisphenol A type epoxy resin and bisphenol A, (3) Reaction product of bisphenol A type epoxy resin or tetrabromo bisphenol A type epoxy resin and tetrabromo bisphenol A, (
4> Examples include brominated phenol novolac type epoxy resins. Further, examples of unsaturated monobasic acids used in the present invention include acrylic acid and methacrylic acid, and examples of unsaturated dibasic acids include fumaric acid and itaconic acid. It is also possible to replace some of these unsaturated acids with saturated acids. In addition, the unsaturated monomers used in the present invention include aromatic vinyl compounds such as styrene, vinyltoluene, and chlorostyrene; ) At least one type is selected from acrylic compounds or allyl compounds such as diallyl phthalate, diallyl fumarate, and diallyl maleate. Phosphorus-containing plasticizers used in the present invention include tris(chloroethyl) phosphate, tris(chloroprovir) phosphate, tris(dicloprovir) phosphate, mono(dichloroprovir) bis(dibromobrovir) phosphate, and tris(dichloroprovir) phosphate. (dibromoprovir) phosphate, tris(bromochloroprovir) phosphate, tris(chloroethyl) phosphite, tricresol phosphate, triphenyl phosphate, tris(isobrobylphenyl) phosphate, etc. From the viewpoint of performance, halogen-containing phosphate is preferred. The amount of these unsaturated monomers and phosphorus-containing plasticizer used is such that the viscosity of the dazzling resin composition is 500 cP/25°C or less, preferably 200 cP/25
It is determined by the amount such that the temperature is ℃. Viscosity is 500cP/
Temperatures above 25°C are generally unfavorable because impregnation is difficult. The curing catalysts used in the present invention include organic peroxyesters such as diasilver oxides such as penzoyl peroxide and lauroyl peroxide, and peroxyesters such as tertiary butyl baroxyisopropyl carbonate and tert. Oxides or azo compounds are used. Wooden materials to which the resin composition of the present invention can be applied may be softwood or hardwood veneers or members5, or particle boards and wood fiberboards. When these wood materials are impregnated with resin compounds, vacuum impregnation or vacuum-pressure impregnation may be used. In particular, if the wood material is a thick member, it is not necessary to impregnate the entire center. Also, the impregnated wood material differs slightly depending on the curing catalyst,
It is usually necessary to heat the resin to a temperature of 100 to 150°C to harden it. The resin-impregnated water materials cured as described above are used as wood-based materials such as flooring materials, interior decoration materials, furniture, doors, and window frames. The present invention will be explained below using examples, but is not limited thereto. Example 1 Tetrabromobisphenol Aff epoxy tree n1.0
1.8 mol of methacrylic acid per mole, Adivin Wi0
．． Add 2 moles and react at 130°C until the acid value becomes 10 or less. 300 g of tris(dichlorpyl)phosphate and 200 g of styrene were added to the above reactant SoOg, and the viscosity was adjusted to 170 cP/25°C. 20 g of Pennzoyl peroxide 50% paste product was added to this mixed wave to prepare a wood processing tree #Jll composition. This is how we got it! The fl resin composite was immersed in a pre-dried white assoche material with a thickness of 10 m x width of 100 m x length of 200 aa using the vacuum method, and then soaked at 140°C.
It was cured for 30 minutes. The resulting resin-impregnated lumber had a fine grain and a surface hardness of 75 on Barcol 935, indicating sufficient hardness. Furthermore, when V4 flammability was evaluated using an oxygen index, it was found to be 40 or higher, indicating sufficiently high flame retardancy. Example 2 Reactant of tetrabromobisphenol A type epoxy resin and tetrabromobisphenol A (see below) 1.0 mol of acrylic llj! 2. Add 0 mol and react at 130°C until the acid value becomes 10 or less. To 500 g of the above reactant were added 300 g of Tris(2,3 dibromobuvir) phosphor and 200 g of styrene, and the viscosity was adjusted to 180 cP/25°C. 20 g of 50% penzoyl peroxide paste was added to this mixed solution to prepare a resin composition for wood processing. The resin composite thus obtained is pre-dried to a thickness of l.
Japanese pine wood measuring 125 m wide x 230 m long was impregnated using the vacuum method and hardened by pressing at 130°C for 10 minutes. The resulting resin-impregnated lumber had a beautifully emphasized wood grain and a hard surface hardness of 70 on Barcol 935. Furthermore, when the flame retardance was evaluated using the IilIIA index, it was found to be sufficiently high with an index of 40 or higher. (Effects of the Invention) As is clear from the examples, the present invention cures the flame-retardant resin composite impregnated into the wood to firmly fix it in the wood and make the wood *m-resistant. It is a resin composition that not only maintains the sense of mass as wood, but also improves performance such as dimensional stability and surface hardness.

Claims (1)

[Scope of Claims] (A) A resin obtained by reacting a bromo-containing epoxy resin with at least one type of basic acid selected from unsaturated monobasic acids or unsaturated dibasic acids (B) Unsaturated monomer ( C) A resin composition for wood processing with improved flame retardancy, characterized by comprising a phosphorus-containing plasticizer (D) a curing catalyst