Composition, rigid polyurethane foam material and refrigeration device

Abstract

The invention discloses a composition, rigid polyurethane foam and a refrigeration device. The composition comprises combined polyether and isocyanate, wherein the combined polyether contains polyol, a foaming agent and a catalyst composition, wherein the foaming agent contains trans-1-chloro-3, 3, 3-trifluoropropene, and the catalyst composition contains N-methyldicyclohexylamine, N, N-dimethylcyclohexylamine and (2-hydroxypropyl) trimethylammonium formate. The composition has long-term storage stability; and furthermore, the foam material obtained by adopting the composition has the characteristics of low heat conduction coefficient, high strength, short curing time and the like, so that an obtained product has a relatively good energy-saving effect.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular, the invention relates to a composition, a rigid polyurethane foam material and refrigeration equipment. Background technique [0002] In 2014, the Chinese government launched a new energy efficiency standard, which was 20% higher than the 2008 energy efficiency standard. At the same time, the EU regulation No. 517 / 2014 on fluorine-containing room temperature gases stipulated that the GWP of household appliances exported to the EU on January 1, 2015 was ≤ 150. As the country pays more and more attention to energy saving and environmental protection, trans-1-chloro-3,3,3-trifluoropropene (HFO-1233zd, referred to as LBA) has low boiling point, non-combustibility, zero ozone depletion potential (ODP) ) and acceptably low global warming potential (GWP<7), especially due to its low thermal conductivity, compounds containing blowing agents for LBA polyurethane foams can be used as en...

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Problems solved by technology

[0003] However, the LBA molecule contains double bonds, and its inherent chemical instability not only provides the desired low global warming potential and zero ozone depletion potential, but also its long-term storage in the combined polyether. Stability creates difficulties

Simultaneously, PC-5 (pentamethyldiethylenetriamine) or A-1[70% dipropylene glycol solution of bis(dimethylaminoethyl)ether], which are conventional foaming catalysts in rigid polyurethane composite materials, are easily React with LBA, thereby further increasing the instability of the foaming material of the LBA system; Heat, which slows down the curing rate of the foam surface, prolongs the curing time, thereby reducing production efficiency

[0004] At present, the use of LBA system foaming materials is instant mixing and immediate use. However, the foaming materials in the pipeline and storage tanks cannot be stored for a long time, which brings difficulties to practical applications.

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