HFC-245eb type combined polyether for polyurethane plastics for boards and preparation method of HFC-245eb type combined polyether

Abstract

The invention discloses HFC-245eb type combined polyether for polyurethane plastics for boards and a preparation method of HFC-245eb type combined polyether. The HFC-245eb type combined polyether for the polyurethane plastics for the boards comprises components of raw materials in parts by mass as follows: 40-135 parts of polyether polyol, 0.8-11 parts of a catalyst, 10-60 parts of a flame-retardant agent, 0-5 parts of a foam stabilizer, 0.5-3 parts of water and 15-80 parts of a foaming agent HFC-245eb. According to the HFC-245eb type combined polyether for the polyurethane plastics for the boards, rigid polyurethane foam plastics used for the boards and prepared from HFC 245eb serving as a foaming agent have good thermal insulation performance, mechanical strength and dimensional stability, are ideal thermal-insulation materials in the field of thermal insulation of construction boards, are safe, environment-friendly and low in cost and meet national energy-conservation and emission-reduction requirements in the field of household appliances such as refrigerators.

Description

technical field [0001] The invention relates to an HFC-245eb type combined polyether used for plate 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 in the fields of panel refrigerators, construction, transportation, petrochemical, aviation and military as thermal insulation materials and structural performance materials. 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 other countri...

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 equipment transformation is difficult, and capital pressure is high; while all-water foaming systems have relatively low thermal conductivity. High, relatively poor dimensional stability, high requirements for raw materials, relatively immature formula, difficult implementation, etc.

Images