A kind of modified polyurethane roof insulation material and preparation method thereof

Abstract

The invention discloses a modified polyurethane roofing thermal-insulation material and a preparation method thereof. The modified polyurethane roofing thermal-insulation material is prepared from the following raw materials: 33-37 parts of polyester polyol, 26-29 parts of polyisocyanate, 31-35 parts of waste polyurethane modification material, 1-2 parts of foaming agent, 0.5-1 part of crosslinking agent, 0.5-1 part of chain extender, 0.4-1.5 parts of foam stabilizer and 0.8 part of composite catalyst, wherein the waste polyurethane modification material is prepared from the following raw materials: 65-75 parts of waste polyurethane powder, 10-14 parts of glycerol, 5-15 parts of diethylene glycol and 5-13 parts of ethylene glycol. Compared with the prior art, polymethylene polyphenyl polyisocyanate and polyester polyol are used as main raw materials, and a product from alcoholysis of waste polyester bottle reclaim reclaimed materials is used as modifier, thereby preparing the high-performance low-cost modified polyurethane roofing thermal-insulation material.

Description

technical field [0001] The invention relates to the field of building roof insulation materials, in particular to a modified polyurethane roof insulation material and a preparation method thereof. Background technique [0002] The frequent occurrence of building fires in recent years is not unrelated to the materials of the building wall insulation layer. How to improve the fire safety performance of building exterior wall insulation materials has become an important issue related to people's livelihood and safety. At present, from the perspective of fire resistance grade of insulation materials, insulation materials used for external insulation systems are mainly divided into three categories: organic polymer insulation materials, inorganic insulation materials, and organic-inorganic composite insulation materials. The development of organic thermal insulation materials is limited due to defects such as low temperature resistance and flammability. With the continuous improv...

AI Technical Summary

Problems solved by technology

However, the mechanical properties and thermal properties of current rigid polyurethane foams cannot meet the requirements of practical applications, and the cost of rigid polyurethane foams prepared in order to meet the standards is relatively high. , Polyurethane material with excellent performance for roof insulation