Composition for thermal insulating layer

A technology of composition and thermal insulation layer, applied in the direction of coating, layered products, transportation and packaging, etc., can solve the problems of insufficient insulation, corrosion, loss of insulation, etc.

Inactive Publication Date: 2006-12-13
G·S·小伯奇尔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] (iv) Preparation of the composition

[0049] According to the present invention, the high porosity particles must be added to the resin system and mixed gently under low shear conditions after the other components of the composition have been blended at higher speeds and at moderate to high shear rates. In the most preferred method, the highly porous particles are mixed under very low shear conditions in a separate vessel with a stabilizer (and if necessary, a very small amount of water to form a homogeneous paste). Once a homogeneous paste is obtained, it is added slowly to the blend of the remaining components with stirring, characterized by very low shear.

[0050] In some embodiments of the invention, time can be saved by omitting a separate premix of the high porosity particles and the stabilizer, and slowly adding the high porosity particles to the premix of all other components of the composition, including the stabilizer . This simplification can be used, for ...

Embodiment 1

[0060] (1) Thickener (Rohm & Haas)

[0061] (2) Defoamer (BYK Chemie USA)

[0062] (3) Dispersant (Rohm & Haas)

[0063] (4) Self-crosslinking epoxy acrylic copolymer (MeadWestvaco)

[0064] (5) Neutralizer, co-dispersant (The Dow Chemical Co.)

[0065] (6) EO-PO Copolymer (BASF)

[0066] (7) Silica Airgel (Cabot)

[0067] Components 1 and 2 were mixed in a Cowles mixer for 5 minutes. Components 3, 4 and 5 were then added and mixed for 5 minutes, after which components 6-12 were added with mixing just until a uniform dispersion was obtained. In the final step, the silica airgel particles (component 13) were added slowly and mixed under cover at a low speed not to exceed 500 rpm / hr. A clear liquid coating composition is obtained.

[0068] The insulating properties of coatings prepared from this composition to a thickness of 0.048 inches were measured by ASTM method ASTM C-518. The results shown below demonstrate the coating's outstanding insulating propert...

Embodiment 2

[0074] (1) Defoamer (BYK Chemie USA)

[0075] (2) Dispersant (Rohm & Haas)

[0076] (3) Self-crosslinking epoxy acrylic copolymer (MeadWestvaco)

[0077] (4) Neutralizer, co-dispersant (The Dow Chemical Co.)

[0078] (5) EO-PO Copolymer (BASF)

[0079] (6) Wetting Agents and Defoamers (Air Products and Chemicals)

[0080] (7) Silica Airgel (Cabot)

[0081] Components 1-4 were mixed in a vortex mixer at low speed for 10 minutes. Then component 5 (TiO in the rutile form 2 powder) was slowly transferred to a vortex mixer. The mixture was covered and dispersed on high speed to a Hegman 6 consistency. Reduce mixing speed and add components 6-13 with continued mixing just until a uniform dispersion is obtained. In the final step, the silica airgel particles (component 14) were added slowly and mixed under cover at a low speed not to exceed 500 rpm / hr. A white liquid coating composition is obtained. [Viscosity=3,600-4,400cps(Spindle 3@20rpm)]

[0082] The insul...

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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...

Claims

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Application Information

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IPC IPC(8): B32B9/04B32B3/26C08J9/00C08K3/04C08K3/34H01L21/31H01L21/469C09D7/61F16L
CPCC08K7/26Y10T428/249967C09D5/028Y10T428/249983Y10T428/249978Y10T428/249969C09D7/1216C09D7/1283C09D7/61C09D7/69C09D191/00C09D183/04
Inventor G·S·小伯奇尔P·瓦赫特尔
Owner G·S·小伯奇尔
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