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Method for protecting substrates and removing contaminants from such substrates

A technology for contaminants and substrates, applied in chemical instruments and methods, cleaning methods and utensils, preparation of detergent mixture compositions, etc., can solve problems such as troublesome marking

Inactive Publication Date: 2010-06-09
CELLULAR BIOENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] These marks are particularly troublesome as they are often difficult to remove from the surface they are on

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A jacketed 1 liter reactor, equipped with a thermocouple, condenser, and stirrer, was charged with 667.2 g of distilled water, 4.2 g of Byk-028, and 4.6 g of 46% by weight sodium hydroxide. The resulting aqueous composition was stirred until the salt had dissolved, then 169.6 g of Celvol 523 were added. The mixture was heated to 85°C for 30 minutes and then cooled to 65°C. 48.3 g of 95% ethanol was added, followed by dropwise addition of 25.4 g of BYK-420. The resulting formulation was then stirred at 65°C for one hour. A premix of 1.7 g Dowicil 75 and 121.1 g distilled water was added slowly with vigorous stirring. The mixture was then filtered to generate Formulation A. Formulation A had a Brookfield viscosity (3 rpm, 25°C, L4 spindle) of 59250 centipoise (cP) and a pH = 7.74.

[0053] 200.0 g of Formulation A neat was added to 800.0 g of deionized (DI) water with moderate agitation and stirred for 20 minutes to generate Formulation B.

Embodiment 2

[0055] A jacketed 1 liter reactor, equipped with a thermocouple, condenser, and stirrer, was charged with 667.2 g of distilled water, 4.2 g of Byk-028, and 4.6 g of 46% by weight sodium hydroxide. The resulting aqueous composition was stirred until the salt had dissolved, then 169.6 g of the water soluble polymer Celvol 508 was added. The mixture was heated to 85°C for 30 minutes and then cooled to 65°C. 48.3 g of 95% ethanol were added dropwise, followed by 25.4 g of BYK-420. The resulting formulation was then stirred at 65°C for one hour. A premix of 1.7 g of Dowicil 75 and 121.1 g of distilled water was added slowly with vigorous stirring. The mixture was then filtered to generate Formulation C. Formulation C had a Brookfield viscosity (3 rpm, 25°C, L4 spindle) of 23740 centipoise and pH = 7.28.

[0056] 100.0 g of Formulation C neat was added to 400.0 g of deionized (DI) water with moderate agitation and stirred for 20 minutes to generate Formulation D.

[0057] Tests...

Embodiment 3

[0059] Formulation E was formed by mixing 96.0 g of neat Formulation B with 4.0 g of BYK 333 (a product from Chemie under the name Polyether Modified Dimethicone Copolymer) with moderate agitation for 10 minutes.

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PUM

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Abstract

This invention relates to a method for removing contaminant material (e.g., graffiti) from a substrate, comprising: applying a coating composition to the substrate, the coating composition comprising water, a water-soluble film forming polymer, a wetting agent and a thixotropic additive; dehydrating the aqueous composition and / or crosslinking the polymer to form a sacrificial barrier coating; depositing the contaminant material on the barrier coating; and removing at least part of the barrier coating and the contaminant material from the substrate.

Description

[0001] This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Application No. 60 / 944,810, filed June 19, 2007. This prior application is hereby incorporated by reference. technical field [0002] The present invention relates to coating compositions for protecting substrates and for removing contaminants from the substrates. More specifically, the present invention relates to sacrificial barrier coatings that can be used to protect various substrates from various contaminants including graffiti and radioactive contaminants (such as iodine 131, technetium 99m, etc.), dirt or mud, toxins And so on pollution. Background technique [0003] Graffiti is a common problem encountered in public places. Furthermore, in general, unwanted markings appear almost anywhere on the surface. For example, house walls may be marked or accidentally marked by children, and workplace walls and other surfaces may be marked unintentionally or unavoidably for any reason. Gra...

Claims

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Application Information

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IPC IPC(8): C09D5/20C11D11/00B08B7/00
CPCG21F9/005B08B7/0014C09D5/20G21F9/002C11D11/0058C11D11/0052C11D3/37C11D2111/24C11D2111/42C09D5/04B08B7/00C11D11/00
Inventor 加里·埃金顿基根·劳蕾尔·戈托
Owner CELLULAR BIOENG
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