Pre-mixed composition providing for foaming and foaming material made of the same

Abstract

The present invention provides a pre-mixed composition providing for foaming, which comprises: polyether polyol, a foaming agent, a catalyst, a light / heat resistant agent, and a surfactant, wherein the polyether polyol is selected from the copolymer of propylene oxide and trihydroxymethyl propane, the copolymer of propylene oxide, ethylene oxide, and trihydroxymethyl propane, the copolymer of propylene oxide, ethylene oxide, and glycerine, or any combination of the above-mentioned copolymers. The present invention also provides a foaming material, which is manufactured by carrying out reaction of the above-mentioned pre-mixed composition providing for foaming and at least a diisocyanate. The foaming material has excellent yellowing resistance, hydrolysis resiatance, degradation resistance, and better mechanical property.

Description

technical field [0001] The invention relates to a polyurethane foam, in particular to a foaming premixed composition for preparing polyurethane foam, and a foam material made from the premixed composition. Background technique [0002] Polyurethane foam is an important livelihood or industrial material. Generally, polyurethane foam is widely used in industries such as furniture, packaging, fabrics and thermal insulation materials, and its required properties depend on the final application. Basically, polyurethane foam is prepared by addition polymerization of diisocyanate, polyol, and diol or diamine as a chain extender. Generally, the disadvantage of polyurethane foam made from polyester polyols is poor weather resistance, that is, it is prone to hydrolysis, cracking and yellowing under conditions such as high humidity, high heat, and strong ultraviolet rays. [0003] TW200823242 discloses a non-yellowing polyurethane foam. The polyurethane foam forms at least one prepo...

AI Technical Summary

Problems solved by technology

This patent publication is to solve the shortcomings of the traditional foam application on gauze that cannot take into account the hygroscopicity and yellowing resistance, and achieve the required properties through the control of aliphatic isocyanate, polyester polyol and surfactant

However, the polyester polyol of this patent application is a solid or high-viscosity fluid, which is inconvenient to use, and because the polyester polyol has better hygroscopicity, the accumulation of moisture over a long period of time will make the polyurethane The problem of hydrolysis of foam

[0005] From the above formula for forming polyurethane foam, it can be seen that although the existing polyurethane foam can overcome the problem of yellowing, it still has problems such as easy cracking, hydrolysis and mechanical property degradation.

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