Preparation method of urea-formaldehyde foamed plastics for thermal insulation

Abstract

The invention provides a preparation method of urea-formaldehyde foamed plastics for thermal insulation. The urea-formaldehyde foamed plastic for thermal insulation of the present invention is composed of 40-45% urea-formaldehyde resin, 46-50% water, 0.4-0.5% surfactant, 2-3% curing agent and inorganic filler as the balance. Preparation method: Dilute the urea-formaldehyde resin and stir until completely dissolved to make a raw material slurry, the density can be adjusted arbitrarily according to the needs; add surfactant to the above raw material slurry; inject the raw material slurry with surfactant into the foaming machine process, At the same time, the curing agent and inorganic filler are injected into the foaming machine; the raw materials injected into the foaming machine are stirred evenly to obtain a foam, and then transported to the finished product box for curing and setting. The equipment includes: raw material solution pool, raw material delivery pump, air pump, foaming machine, curing agent solution pool, curing agent delivery pump, filler pool, filler pump, finished product container, motor and stirring head.

Description

technical field [0001] The invention relates to a method for preparing urea-formaldehyde foam plastics for thermal insulation, and belongs to the technical field of preparation methods of urea-formaldehyde foam plastics. Background technique [0002] Existing insulation materials such as polystyrene boards and polyurethane boards are flammable products, which will produce a large amount of toxic and harmful smoke when burned, have disadvantages such as polluting the environment, and also have certain hidden safety hazards, and must be produced in factories. It cannot be poured on site, requires high production equipment, occupies a large space, pollutes the environment, and has certain damage to the health of processing and production personnel. When using and installing, splicing and installation are required, the requirements for construction facilities are high, and a large amount of corner waste and other garbage will be generated. Contents of the invention [0003] T...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the above-mentioned prior art, that is, the existing thermal insulation materials such as polystyrene boards and polyurethane boards are inflammable products, which will produce a large amount of toxic and harmful smoke when burning, and pollute the environment. There are still some potential safety hazards, and it must be produced in a factory, and cannot be poured on site. The production equipment requires high requirements, occupies a large space, pollutes the environment, and has certain damage to the health of processing and production personnel.

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