Polyhydric alcohol composition and polyurethane rigid foamed plastic prepared by same

Abstract

The invention discloses a polyhydric alcohol composition. The polyhydric alcohol composition is prepared from multiple polyether polyols and anacardol modified polyhydric alcohol, wherein the anacardol modified polyhydric alcohol is prepared by anacardol and epoxy resin or bifunctional glycidyl ether through reaction according to the mole number ratio 1.2 to 1 of phenolic hydroxyl groups to epoxygroups. The invention also discloses application and a preparation method of the polyhydric alcohol composition in polyurethane rigid foamed plastic. By means of the longer alkane structure of the anacardol modified polyhydric alcohol, the polyhydric alcohol composition and components using cyclopentane or the composition as a foaming agent have good compatibility. The foam density difference value of polyurethane rigid foam prepared by the polyhydric alcohol composition is decreased, the percentage of closed pores of the foam is high, the comprehensive heat conductivity coefficient of the foam is reduced, and the compression strength and size stability of the foam are somewhat improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam plastics, and in particular provides a polyol composition and polyurethane rigid foam plastics prepared therefrom. Background technique [0002] Polyurethane is a kind of polymer whose main chain contains -NHCOO- repeating structural units, and is mainly polymerized by isocyanate, polyester polyol, chain extender and other raw materials. Since polyurethane contains strong polar carbamate groups, it is insoluble in non-polar groups, and has good oil resistance, toughness, wear resistance, aging resistance and adhesion, and can be prepared with a wide temperature range. Materials such as elastomers, thermoplastic resins, and thermosetting resins. Polyurethane, as an organic polymer material with high cost performance, is widely used in various fields in real life at present, and its output and consumption are also increasing year by year. [0003] As one of the main components, polyols g...

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Problems solved by technology

[0005] For example, patent CN105992784A discloses that a cardanol-modified epoxy polyol can be used to form a polyurethane resin system; the polyurethane resin system includes a first cardanol component and the cashew nut An isocyanate-reactive component of a phenol-modified epoxy polyol, and an isocyanate component comprising at least one polyisocyanate; the cardanol-modified epoxy polyol is a 1:0.95 to 1:5 epoxy The reaction product of epoxy component and epoxy reactive component under the ratio of epoxy reactive group to epoxy reactive group, but the cost of epoxy reaction is high and the process is complicated

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