HFC-245eb type composite polyether for refrigerator polyurethane plastic and preparing method of HFC-245eb type composite polyether

Abstract

The invention discloses HFC-245eb type composite polyether for refrigerator polyurethane plastic and a preparing method of the HFC-245eb type composite polyether. The HFC-245eb type composite polyether for the refrigerator polyurethane plastic comprises, by mass, 30-140 parts of polyether polyol, 0.7-6 parts of catalyst, 0-5 parts of foam stabilizer, 1-3 parts of water and 10-60 parts of foaming agent HFC-245eb. According to the HFC-245eb type composite polyether for the refrigerator polyurethane plastic, the hard refrigerator polyurethane foam plastic prepared through the foaming agent HFC-245eb has the good heat preservation performance, mechanical strength and dimension stability, is an ideal heat preservation material in the field of heat preservation of household electric appliances of refrigerators, is safe and environmentally friendly, and meets the national energy-conservation and emission-reduction requirements in the household electric appliance field of refrigerators.

Description

technical field [0001] The invention relates to an HFC-245eb type combined polyether used in refrigerator polyurethane plastics and a preparation method thereof, belonging to the field of polyurethane foam plastics. Background technique [0002] Rigid polyurethane foam is currently the best thermal insulation and energy-saving material in the world. It is widely used as thermal insulation material and structural performance material in refrigerator freezers, construction, transportation, petrochemical, aviation and military and other fields. Blowing agent is the most important additive in PU foam plastics. The type and quantity of blowing agent have a direct impact on the physical and mechanical properties, foam density, and temperature resistance of PU. According to the Montreal Protocol and its subsequent amendments, the deadline for developing countries to use HCFC-141b is 2030, for some developed countries it is required in 2010, and for the United States, Japan and othe...

AI Technical Summary

Problems solved by technology

[0004] At present, although hydrocarbon foaming agents and all-water foaming agents are also used, hydrocarbon foaming agents are flammable and explosive, and have poor thermal insulation capabilities; while all-water foaming systems have high thermal conductivity and size Relatively poor stability, high requirements for raw materials and other shortcomings, currently rarely used in the field of refrigerators and household appliances

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