Method for preparing glass steel phenolic resin substrate

Abstract

The invention discloses a method for preparing a glass steel phenolic resin substrate, which comprises the following steps of: 1, putting phenol, aldehyde and alkali into a reaction kettle in a molar ratio of 1.0:(1.5-3.0):(0.001-0.1) and performing polycondensation reaction; 2, adding a pH value regulator into a product in the step 1 to regulate the pH value to 3 to 9, and distilling under reduced pressure until the viscosity of the product is between 1,000 and 3,000 centipoises at 25 DEG C; and 3, adding acidic components into the product in the step 2, and stirring uniformly, wherein a weight percent ratio of the acidic components to the product is (70-99.5):(0.5-30). The phenolic resin substrate prepared by the method is mainly used for manually-molded glass steel, and can be solidified at normal temperature, so energy is saved to a great degree, labor intensity is reduced, and the aims of energy conservation and consumption reduction are fulfilled.

Description

technical field [0001] The invention relates to the technical field of phenolic resins, in particular to a method for preparing a phenolic resin substrate for glass fiber reinforced plastics. Background technique [0002] FRP, the scientific name of glass fiber reinforced plastics, is a composite reinforced plastic material that uses glass fiber and its products, such as glass cloth, tapes, felts, yarns, etc. as reinforcing materials, and synthetic resin as a matrix material. FRP products are much better than traditional products in terms of performance, use, and lifespan. They are easy to shape, customizable, and can be freely adjusted in color. They are favored by merchants and sellers, occupying an increasing market share, and have a bright future. . [0003] The development of FRP business, as a reinforcing material for plastic substrates, has expanded from glass fiber to carbon fiber, boron fiber, aramid fiber, alumina fiber and silicon carbide fiber. In synthetic res...

AI Technical Summary

Problems solved by technology

In synthetic resins, phenolic resin is generally used as the base material to make FRP. Compared with traditional unsaturated polyester resin FRP, phenolic resin FRP products have better fire and flame retardant performance, but due to the curing speed of phenolic resin is slower than that of unsaturated resin. In other words, the reactivity of phenolic resin is low, the curing speed is slow, the curing process needs to be heated, and at the same time the curing reaction releases condensation water, so that the curing must be carried out under high temperature and high pressure conditions.

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