Flame-retardant composite polyether for on-site spraying

Abstract

The invention belongs to a main raw material for rigid polyurethane foam, and provides flame-retardant composite polyether for on-site spraying. The composite polyether is prepared from following raw materials according to a ratio: L-4110C polyether, triethanolamine, 3152 polyester, tris(1-chloro-2-propyl)phosphate, A33, silicone oil (8805), 1,3,5-tris[3-(dimethylamino)propyl]hexahydro-1,3,5-triazine, potassium oleate, pentamethyldiethylenetriamine, dibutyltin dilaurate and dichlorofluoroethane. Compared with products of the same type, the composite polyether has obvious advantages and is advantageous in that: a polyether cost is low; a formula is simple; during using, products of the composite polyether are milky white, short in wire drawing and debonding time and good in adhesion force; the oxygen index can reach 30; the free bubble density can reach about 40, and flame retardant effects are ensured.

Description

technical field [0001] The invention belongs to the main raw material of rigid polyurethane foam. Background technique [0002] Combined polyether is one of the main raw materials of polyurethane rigid foam, also known as white material, and it is called black and white material together with polymeric MDI. Combination polyether is composed of polyether monomer, foam stabilizer, crosslinking agent, catalyst, foaming agent and other components. On-site spraying combined polyether requires milky white, wire drawing, short debonding time, and good adhesion. The production of ordinary polyether is relatively simple, but with the increase in flame retardancy requirements in recent years, especially the oxygen index is required to reach 30, It is very difficult to achieve in production. Even if the product density is basically above 45, the current relatively large oxygen index of BASF and Wanhua is around 28. Contents of the invention [0003] The purpose of the present inven...

AI Technical Summary

Problems solved by technology

On-site spraying combined polyether requires milky white, wire drawing, short debonding time, and good adhesion. The production of ordinary polyether is relatively simple, but with the increase in flame retardancy requirements in recent years, especially the oxygen index is required to reach 30, It is very difficult to achieve in production. Even if the product density is basically above 45, the current relatively large oxygen index of BASF and Wanhua is around 28.

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