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Coatings incorporating hydrophobic compounds

a technology of hydrophobic compounds and coatings, applied in the direction of coatings, pretreated surfaces, weapons, etc., can solve the problems of short perfluoroalkyl chains or no fluorine content, and the performance of polymers containing shorter perfluoroalkyl chains is traditionally lower, and the effect of fluorinated counterparts is less

Inactive Publication Date: 2019-02-07
THE CHEMOURS CO FC LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a coating for articles that provides surface effects similar to fluorinated treatments but without using fluorinated compounds. The coating is made of a base and a small amount of a hydrophobic compound, which can be a cyclic or acyclic alcohol. The coating can be applied to articles and has a thickness of at least 0.1 mils. The technical effect is that the coating provides the desired surface effects while using non-fluorinated or partially fluorinated compositions.

Problems solved by technology

Thus, polymers containing shorter perfluoroalkyl chains or having no fluorine content have traditionally exhibited lower performance.
Non-fluorinated copolymers are known to provide water repellency and optionally stain release to textiles, but are less effective than the fluorinated counterparts.

Method used

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  • Coatings incorporating hydrophobic compounds
  • Coatings incorporating hydrophobic compounds
  • Coatings incorporating hydrophobic compounds

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0055]Into a 4-neck round bottom flask equipped with an overhead stirrer, thermocouple and condenser is added sorbitan tristearate (111 g) and 4-methyl-2-pentanone (MIBK, 274 g). The solution is heated to 80° C. An aqueous dispersion is then prepared by adding warm water (512 g), CHEMIDEX S (2.4 g), ETHAL LA-4 (3.2 g) and acetic acid (1.6 g) at 65° C. The mixture is immersion blended (2 min), homogenized at 6000 psi, and the resulting dispersion is distilled under reduced pressure to remove the solvent and yield a non-flammable dispersion at 13.15% solids after cooling and filtering. The product is dosed into paint such that the sorbitan tristearate composes 1% by weight of the sample and tested according to the test methods above.

example 2

[0056]Example 1 is repeated, except 0.59 g of CAPSTONE FS-81 is added to the 100-g paint sample and mixed according to the dosing procedure above. The resulting paint is tested according to the test methods above.

example 3

[0057]Into a 4-neck round bottom flask equipped with an overhead stirrer, thermocouple and condenser is added sorbitan tristearate (80 g) and MIBK (200 g). The solution is heated to 70° C. An aqueous dispersion is then prepared by adding warm water (225 g), CHEMIDEX S (1.7 g), ETHAL LA-4 (2.3 g), acetic acid (1.2 g), and dipropylene glycol (19.7 g) at 65° C. The mixture is immersion blended (2 min), homogenized at 6000 psi, and the resulting dispersion is distilled under reduced pressure to remove the solvent and yield a non-flammable dispersion at 10.73% solids after cooling and filtering. The product is dosed into paint such that the sorbitan tristearate composes 1% by weight of the sample and tested according to the test methods above.

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Abstract

The present invention relates to a coated article comprising a partial or complete coating on the surface of an article, wherein the coating comprises a coating base and 0.1 to 5% by weight of a hydrophobic compound, based on the total solids weight of the coating, selected from a hydrophobic cyclic or acyclic alcohol, and the coating has a film thickness of at least 0.1 mils.

Description

FIELD OF THE INVENTION[0001]Hydrophobic substituted alcohols are employed in coatings to provide surface effects to various articles.BACKGROUND OF THE INVENTION[0002]Fluorinated polymer compositions are used in the preparation of a wide variety of surface treatment materials to provide surface effects to substrates. Many such compositions are fluorinated acrylate polymers or copolymers which contain predominantly eight or more carbons in the perfluoroalkyl chain to provide the desired properties. Honda, et al., in Macromolecules, 2005, 38, 5699-5705 teach that for perfluoroalkyl chains of greater than 8 carbons, orientation of the perfluoroalkyl groups, designated Rf groups, is maintained in a parallel configuration while for such chains having 6 or less carbons, reorientation occurs. This reorientation is recited to decrease surface properties such as contact angle. Thus, polymers containing shorter perfluoroalkyl chains or having no fluorine content have traditionally exhibited lo...

Claims

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Application Information

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IPC IPC(8): C09D7/63C09D4/00
CPCC09D7/63C09D4/00C09D7/00B05D3/007C09D5/00F41H9/04F41H13/0006
Inventor BROWN, GERALD ORONDESWOREN, JOHN CHRISTOPHER
Owner THE CHEMOURS CO FC LLC