Hard polyurethane foam composite, foam preparation method and thermal insulation component

Abstract

The invention relates to a hard polyurethane foam composite which comprises the following components: (a) a polyhydric alcohol composite comprising a polyether polyol polymerized from sucrose and oxidized olefin, a polyether polyol polymerized from sorbitol, glycerinum and oxidized olefin, an amine polyether polyol polymerized from toluenediamine and the oxidized olefin, a polyether polyol polymerized from glycerinum and the oxidized olefin, and a polyether polyol polymerized from MDA (methylene diphenylamine) and the oxidized olefin; (b) a foam stabilizer; (c) a composite catalyst comprising a foaming catalyst, a gel catalyst and a polymerization catalyst at the weight ratio of (0-4):(0.2-10):1; (d) a foaming agent; (e) water; and (f) an organic isocyanate. The invention further relates to a hard polyurethane foam preparation method and a thermal insulation component comprising the hard polyurethane foam.

Description

technical field [0001] The present invention relates to a rigid polyurethane foam composition, a method for preparing the rigid polyurethane foam and a thermal insulation component comprising the rigid polyurethane foam, in particular to a rigid polyurethane foam suitable for rapid demoulding of a door body Foam compositions, methods of making said rigid polyurethane foams, and insulation assemblies comprising said rigid polyurethane foams. Background technique [0002] In the manufacturing industry of refrigeration equipment such as refrigerators, the demoulding time of the foaming process, as the main factor affecting production efficiency, has always been a major technical bottleneck that plagues many companies, which seriously affects the improvement of refrigerator production efficiency. [0003] At present, the demoulding time of the refrigerator box in the industry is generally ≤300s, and the demoulding time of the door body is generally ≥330s, such as 330s for steel ...

AI Technical Summary

Problems solved by technology

[0004] Many researches have been devoted to the development of rigid polyurethane foam compositions with fast demoulding time, but these rapid demoulding polyurethane related technologies are still not suitable for rapid demoulding and foaming of door body

For example, patent CN02120940.5 discloses a rigid polyurethane foam composition based on HCFC-141 b foaming system, but it only mentions that the release performance is improved, and there is no clear release time

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