Preparation method of wood-imitated polyurethane foam stabilizer

Abstract

The invention discloses a preparation method of a wood-imitated polyurethane foam stabilizer. The method comprises the following steps that 1) octamethyl cyclotetrasiloxane, hexamethyldisiloxane and silicone oil with high hydrogen content react under the effect of an acid catalyst to obtain silicone oil with low hydrogen content; 2) diethylene glycol, propylene oxide and ethylene oxide react undera base catalyst to obtain a micromolecule dihydric alcohol polyether dispersing agent; 3) silicone oil with low hydrogen content, unsaturated hydrocarbon, allyl alcohol polyether, a complexation metal catalyst and the micromolecule dihydric alcohol polyether dispersing agent are added to a reaction kettle, and the wood-imitated polyurethane foam stabilizer is obtained through a reaction. According to the preparation method, the self-prepared micromolecule dihydric alcohol polyether dispersing agent is added in the preparation process and is beneficial to promotion of good dispersion of all components, the conversion rate of the reaction process is higher, and occurrence of the side reaction is reduced; in the foaming process, the viscosity of the system can be lowered, the compatibility of all components in the system is improved, the defects of the main product are overcome, and bubbles of the surface skin are reduced.

Description

technical field [0001] The invention relates to a wood-like polyurethane foam stabilizer, more specifically, to a wood-like polyurethane foam stabilizer and a preparation method thereof. The wood-like polyurethane foam stabilizer can be used in the foaming process of polyurethane foam. Background technique [0002] Polyurethane foam is one of the main varieties of polyurethane synthetic materials, which has the advantages of porosity, low relative density and high specific strength. It can be made into soft, semi-rigid and rigid polyurethane foam by adjusting the raw materials and formula used. Polyurethane foam has a wide range of applications and has penetrated into almost all sectors of the national economy. It is widely used in furniture, bedding, transportation, refrigeration, construction, heat insulation and other industries, and has become one of the indispensable materials. Among them, polyurethane soft foam is mainly used in furniture, bedding and other furniture ...

AI Technical Summary

Problems solved by technology

However, the functions played by the foam stabilizer in the foaming process of polyurethane foam, such as emulsification, nucleation, foam stabilization and material fluidity, are mutually restricted. When the foam stabilizer reduces the surface tension of the polyurethane foam system, the material The emulsification and fluidity will be improved, but this will reduce the foam nucleation and foam stability

[0004] In the field of rigid polyurethane foam, there are certain shortcomings in the blowing agents used. For example, the blowing agents used in the early days were CFC-11 and HCFC compounds, which contained ingredients that could destroy the ozone layer; the compounds HFC-245fa and Cyclopentane also has certain restrictions in use, such as high price and flammability

The demand for safe and environmentally friendly all-water polyurethane imitation wood products is increasing, but the currently commonly used imitation wood foam stabilizers have many defects in the foaming process: white lines, pores, pinholes, poor fluidity, etc., the market There is a need for a foam stabilizer for defects in imitation wood products

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