Composite polyol for producing hard polyurethane foam

Abstract

The present invention relates to chemical material. The material for producing hard polyurethane foam includes: polyol based on cane sugar 30-50 wt%, polyepoxy ethane/polyepoxy propane polyether polyol with molecular weight of 500-800 and based on sorbic alcohol 14-30 wt%, polyepoxy ethane/polyepoxy propane polyether polyol with molecualr weight of 100-300 and based on amines 0-10 wt%, linear polyepoxy ethane/polyepoxy propane polyether polyol with 500-1000 molecular weight 5-15 wt%, polyester polyol with 200-700 molecular weight and based on aromatic acid anhydride 0-10 wt%, other compound with 60-500 molecular weight and with at least one hydrogen atom capable of reacting with isocyanate 1-5 wt%, water 1-7 wt%, amine catalyst 0.5-5.0 wt% and optional supplementary material and/or additive 1-15 wt%.

Description

technical field [0001] The invention relates to a combined polyol chemical material, in particular to a combined polyol for producing rigid polyurethane foam, which belongs to the field of chemical materials. technical background [0002] Rigid polyurethane foam has the characteristics of good thermal insulation effect, high specific strength, electrical properties, chemical resistance and sound insulation effect, and is widely used as thermal insulation material, structural material and "synthetic wood". Today, rigid polyurethane foam has penetrated into many sectors such as construction, petrochemical, refrigeration, shipbuilding, vehicles, aviation, machinery, instrumentation, etc., as thermal insulation materials and structural materials. Pouring foaming is a commonly used molding method, and more than 50% of rigid polyurethane foams are molded by this method. The pouring and foaming operation process is: according to the proportion of the formula, various chemical raw ...

AI Technical Summary

Problems solved by technology

For details, see "Polyurethane Foam Plastics", edited by Fang Yusheng, Zhu Lumin, etc., the first edition in August 1994, ISBN7-5025-1201-2 / TQ 694, Chemical Industry Press, pages 433, 435, this technology has been removed If the moldability is poor, in order to ensure the quality of the product, the demoulding time must be extended, which reduces the production efficiency and increases the production cost