Composition for thermal insulating layer

Abstract

A curable coating composition for forming a thermal insulating layer, the composition comprising: (a) highly porous particles of a material obtained by drying a wet sol-gel, the particles having a porosity of at least 80% and a particle size in the range from 5 mum to 4.0 mm; and (b) a film forming resin system comprising a film forming polymer, wherein the particles (a) are dispersed in the resin system (b), and the resin system (b) contains at least one stabilizer having an average molecular weight in the range from about 1,000 to about 4,000, said stabilizer being at least one member selected from the group consisting of ethylene oxide-propylene oxide block copolymers, poly C2 - C3 alkoxylated C12 - C18 saturated or unsaturated fatty alcohols, poly C2 - C3 alkoxylated hydrogenated or partially hydrogenated castor oils, poly C2 - C3 alkoxylated hydrogenated or partially hydrogenated soybean oils, polydimethyl siloxane C2 - C3 alkoxylates, and sorbitan esters of C12 - C18 saturated or unsaturated fatty acids, the amount of the particles (a) is in the range from 2 to 6% by weight, based on the weight of the composition, and the amount of the stabilizer is in the range from about 50 % to about 90% by weight, based on the weight of the highly porous particles. The composition has high storage stability and forms a coating having excellent insulation value.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 60 / 519,400, filed November 12, 2003, which is hereby incorporated by reference. Background technique [0003] The present invention relates to thermal insulation, and more particularly, to coating compositions for forming thermal insulating layers on substrates, methods of forming such thermal insulating layers and methods for preparing such compositions. [0004] Unintended heat transfer results in inefficient energy use and increased financial costs for consumers as well as in industrial facilities. Examples of such unwanted heat transfer are: heat gain from building structures absorbed by solar radiation; heat loss from improperly insulated pipes and other structures, etc. Long-term heat transfer may cause degradation of the materials that transfer the heat. Another effect of unintended heat transfer is lost worker productivity due to burns or frostb...

AI Technical Summary

Problems solved by technology

[0006] Each of the above insulation methods suffers from one or more of the following problems: loss of insulation after installation due to penetration of dust, moisture, mildew and mildew; Accumulation of moisture, especially condensation caused by temperature differences at the interface between the insulator and the substrate, corrosion, and insufficient insulation, especially in the case of surface coatings