Phenolic resin type fiber finishing agent and preparation method thereof

Abstract

The invention discloses a phenol formaldehyde resin type fibre treatment agent and the preparation method, relating to a fibre treatment agent and the preparation method, solving the problem that the prior fibre treatment agent and is not effective, only having effect to one or two fibres, but having no effect to other fibres. The invention consists of a phenol formaldehyde resin which accounts for 15 to 30 percent and solvent which accounts for 70 to 85 percent; the phenol formaldehyde resin is made of 100 shares of phenol, 100 to 120 shares of formaldehyde and 10 to 13 shares composite catalyst through a polycondensation; the composite catalyst is made of alkali metal oxides, diamine and dibasic acid according to the mol ratio of 0.1 to 0.5: 0.8 to 1.2:1; including the following preparation method: 1. evenly mixing the phenol and the formaldehyde at room temperature; 2. adding the composite catalyst, warming and mixing 1.5 to 3 hours; 3. adding the ethanol after the vacuum distillation. The production of the invention is capable of obviously increasing the shear strength of the composite material layers, and having obvious effect to various fibres, and being used as the matrix resin and the cementing compound of the composite material matrix resin.

Description

technical field [0001] The invention relates to a fiber treatment agent and a preparation method thereof. Background technique [0002] With the development of economy and technology, the application of composite materials is becoming more and more extensive. One of the most important technologies is how to improve the shear strength of the fiber-matrix interface. Surface treatment of fibers is one of the most important methods at present. There are many fiber surface treatment methods, among which the coating method is the most simple and practical. Such surface treatment agents are mainly organosilicon coupling agents, titanates, complexes, etc., which are coated on the fiber surface under certain conditions to improve the fiber surface. Interfacial shear strength of composite materials. However, after using these treatment agents, the interfacial strength of the composite material is not significantly improved, and some treatment agents even have no effect, and each type...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the current fiber treatment agent is not effective, and can only be effective for one or two types of fibers, and is ineffective for other types of fibers; the invention provides a phenolic resin type fiber treatment agent and Its preparation method, using the treatment can improve the interlaminar shear strength of various fiber reinforced composite materials