Stain and fouling resistant polyurea and polyurethane coatings

a technology of polyurea and coatings, applied in the field of stain and fouling resistant coatings, can solve the problems of reducing efficiency, affecting the effect of abrasion resistance, and affecting the effect of abrasion resistance, and achieves the effects of high hardness, chemical resistance, and flexibility

Inactive Publication Date: 2008-09-25
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] The compositions of the invention can be applied in convenient manner, e.g., spraying, to form films or coatings on substrates. The resultant films or coatings can exhibit exceptional physical properties such as high hardness, flexibility, abrasion resistance, and chemical resistance. Durable and light weight, films and coatings of the invention exhibit oil-repellency, water-repellency, and stain resistance. The invention provides polyurethane and polyurea coatings that provide heretofore unattainable resistance to staining and fouling.

Problems solved by technology

Although such coatings have been used in a variety of applications, a deficiency has been the tendency of such coatings to stain and / or foul.
Such staining or fouling may be of mere aesthetic concern or may, in some cases, represent an important functional or performance deficiency.
Such sands tend to stick to equipment and vehicles used to move and process them.
As a result, efficiency is reduced as the deposits build up, increasing the weight of moving vehicles, clogging handling chutes, etc.
When the rail car is emptied significant quantities of the load remain stuck to the car.
As a result, as much as 25% of the potential load carrying capacity of the rail cars might be lost.
Removal is a labor and cost intensive exercise.

Method used

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  • Stain and fouling resistant polyurea and polyurethane coatings
  • Stain and fouling resistant polyurea and polyurethane coatings
  • Stain and fouling resistant polyurea and polyurethane coatings

Examples

Experimental program
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Effect test

example 1

[0057] A two component polyurea (Part A and Part B) was formulated as follows. Part A contained hexamethylene diisocyanate (85.2% by weight, obtained from Rhodia, Inc., Cranbury, N.J., under the trade designation “TOLONATE™ HDT LV2”), glass microspheres (13.5% by weight, obtained from 3M Company under the trade designation “3M™ GLASS MICROSPHERES K37”) and a modified polyurea (1.3% by weight, obtained from BYK Chemie, Wesel, Germany, under the trade designation “BYK™ 410”). Part B contained diethyltoluenediamine (31.6% by weight, obtained from Albemarle Corporation, Bayport, Tex., under the trade designation “ETHACURE 100”), polyoxypropylenediamine (38.7% by weight, obtained from Huntsman Corporation, Salt Lake City, Utah, under the trade designation “JEFFAMINE™ D-2000”), an aromatic secondary diamine (6.3% by weight, obtained from UOP, A Honeywell Company, Tonawanda, N.Y. under the trade designation “UNILINK™ 4200”), a trifunctional amine (2.4% by weight, obtained from Huntsman Cor...

example 2

[0059] A two component polyurea (Part A and Part B) was formulated as follows. Part A contained hexamethylene diisocyanate (84.4% by weight, obtained from Rhodia, Inc., Cranbury, N.J., under the trade designation “TOLONATE™ HDT LV2”), glass microspheres (12.3% by weight, obtained from 3M Company under the trade designation “3M™ GLASS MICROSPHERES K37”), a modified polyurea (1.3% by weight, obtained from BYK Chemie, Wesel, Germany, under the trade designation “BYK™ 410”) and a fluorochemical urethane (2% by weight, obtained from 3M Company under the trade designation “SRC-220”. Part B contained diethyltoluenediamine (32.4% by weight, obtained from Albemarle Corporation, Bayport, Tex., under the trade designation “ETHACURE™ 100”), polyoxypropylenediamine (39.6% by weight, obtained from Huntsman Corporation, Salt Lake City, Utah under the trade designation “JEFFAMINE™ D-2000”), an aromatic secondary diamine (6.5% by weight, obtained from UOP, A Honeywell Company, Tonawanda, N.Y. under ...

example 3

[0061] A two component polyurea (Part A and Part B) was formulated as follows. Part A contained hexamethylene diisocyanate (76.8% by weight, obtained from Rhodia, Inc., Cranbury, N.J., under the trade designation “TOLONATE™ HDT LV2”), glass microspheres (12.2% by weight, obtained from 3M Company under the trade designation“3M™ GLASS MICROSPHERES K37”), a modified polyurea (1.0% by weight, obtained from BYK Chemie, Wesel, Germany, under the trade designation “BYK 410”) and a fluorochemical urethane (10% by weight, obtained from 3M Company under the trade designation “SRC-220”. Part B contained diethyltoluenediamine (32.4% by weight, obtained from Albemarle Corporation, Bayport, Tex., under the trade designation “ETHACURE™ 100”), polyoxypropylenediamine (39.6% by weight, obtained from Huntsman Corporation, Salt Lake City, Utah under the trade designation “JEFFAMINE™ D-2000”), an aromatic secondary diamine (6.5% by weight, obtained from UOP, A Honeywell Company, Tonawanda, N.Y., under ...

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Abstract

Transporters, e.g., ore carriers, vehicles, materials handling equipment, etc. having fluorinated polyurea and fluorinated polyurethane coatings thereon.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims the benefit of U.S. Provisional Patent Application No. 60 / 882,790, filed Dec. 29, 2006.FIELD [0002] The present invention relates to polyurea compositions and polyurethane compositions for forming coatings and coatings formed from such compositions. In particular the invention relates to stain and fouling resistant coatings, e.g., for use on rail cars, containers, vehicles, etc. BACKGROUND [0003] It has been known to use polyurethane compositions and polyurea compositions for forming coatings on substrates for a variety of purposes. Such compositions have been applied in a variety of approaches including spraying. [0004] Although such coatings have been used in a variety of applications, a deficiency has been the tendency of such coatings to stain and / or foul. Such staining or fouling may be of mere aesthetic concern or may, in some cases, represent an important functional or performance deficiency. [0005] A devel...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D21H17/46
CPCC08G18/6685C08G18/712C08G18/73C08G2150/50C08K7/28C09D175/02C08L75/02C08L2666/20
Inventor AMOS, STEPHEN E.MESSNER, ROBERT P.
Owner 3M INNOVATIVE PROPERTIES CO
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