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Anti-Fog Polyurethane Coating Composition

A composition and polyurethane technology, applied in polyurea/polyurethane coatings, coatings, thin material treatment, etc., can solve problems such as poor anti-fog coatings

Active Publication Date: 2016-03-09
SDC TECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrophilic surfaces will at some point become saturated with water, resulting in the formation of water droplets on the surface that scatter light and poor anti-fog coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] Embodiment 1-preparation of aqueous polyurethane dispersion with amphoteric surfactant

[0147] 21.1 grams of IPDI, 28.2 grams of PC2000, 2.1 grams of trimethylolpropane, 3.2 grams of dimethylolpropionic acid, 8.1 grams of Tegomer D3403 and 35 grams of methyl ethyl ketone were mixed together. The mixture was heated to 70°C and 0.01 g of tin catalyst was added. The mixture was then allowed to react for 3 hours under nitrogen atmosphere. After the reaction was finished, the obtained polyurethane prepolymer mixture was cooled to 40°C. 40.3 grams of the polyurethane prepolymer mixture was then dispersed into 51.2 grams of water and 7.0 grams of an aqueous betaine surfactant solution using a high shear disperser. 0.25 grams of hydrazine monohydrate and 0.58 grams of 1,6-hexanediamine were also added during dispersion with the high shear disperser to produce an aqueous polyurethane dispersion with a solids content of approximately 27% by weight of the dispersion. The res...

Embodiment 2

[0149] Embodiment 2-preparation of aqueous polyurethane dispersion with amphoteric surfactant

[0150] 24.7 grams of IPDI, 14.7 grams of PC2000, 3.2 grams of trimethylolpropane, 3.0 grams of dimethylolpropionic acid, 15.3 grams of PEO-side chain diol, 1.9 grams of PTF1000 and 35 grams of acetonitrile were mixed together. The mixture was heated to 70°C and 0.01 g of tin catalyst was added. The mixture was then allowed to react for 3 hours under nitrogen atmosphere. After the reaction was finished, the obtained polyurethane prepolymer mixture was cooled to 40°C. 40.9 grams of the polyurethane prepolymer mixture was then dispersed into 51.2 grams of water and 7.4 grams of the aqueous amine oxide surfactant solution using a high shear disperser. 0.55 grams of hydrazine monohydrate was also added during dispersion with the high shear disperser to produce an aqueous polyurethane dispersion with a solids content of approximately 28% by weight of the dispersion. The resulting pol...

Embodiment 3

[0152] Example 3 - Preparation of aqueous polyurethane dispersions with amphoteric surfactants

[0153] 22.0 grams of IPDI, 20.2 grams of PC2000, 2.1 grams of trimethylolpropane, 3.2 grams of dimethylolpropionic acid, 9.1 grams of PEO-side chain diol, 5.9 grams of PEG1000 and 35 grams of methyl ethyl ketone were mixed together. The mixture was heated to 70°C and 0.01 g of tin catalyst was added. The mixture was then allowed to react for 3 hours under nitrogen atmosphere. After the reaction was finished, the obtained polyurethane prepolymer mixture was cooled to 40°C. 37.2 grams of the polyurethane prepolymer mixture were then dispersed into 53.3 grams of water and 7.3 grams of the aqueous amine oxide surfactant solution using a high shear disperser. 0.25 grams of hydrazine monohydrate and 0.59 grams of 1,6-hexanediamine were also added during dispersion with the high shear disperser to produce an aqueous polyurethane dispersion with a solids content of approximately 27% by...

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Abstract

Described herein are polyurethane coating compositions that provide clear, abrasion resistant and water washable anti-fog coatings when applied to a substrate and cured. These polyurethane coating compositions have surfactants chemically bonded to the polyurethane so as not to leach or wash off when soaking or washing the coated surface with water. The polyurethane coating composition comprises an isocyanate-reactive surfactant, an isocyanate-reactive salt of a surfactant, a carboxylic acid-reactive surfactant, or a combination thereof chemically bonded to the polyurethane. Also provided herein are articles coated with such polyurethane coating compositions and methods of applying the coating compositions to substrates.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and any other benefit to U.S. Provisional Patent Application Serial No. 61 / 491,597, filed May 31, 2011, and entitled "ANTI-FOG POLYURETHANECOATING COMPOSITIONS," the entire disclosure of which is hereby incorporated by reference Incorporated into this article. technical field [0003] The present invention relates to anti-fog coating compositions. More particularly, the present invention relates to polyurethane coating compositions that provide clear, abrasion resistant and water washable anti-fog coatings when applied to a substrate and cured. The invention also relates to articles coated with such polyurethane coating compositions and methods of applying the coating compositions to substrates. The anti-fog polyurethane coating composition is applied directly to a substrate or directly to a primed substrate and cured, or the coating composition is cast as an unsupported film for subse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D33/04
CPCC08G18/4833C08G18/807C08G18/0823C09D175/04C08G18/4018C08G2290/00C08G18/6692C08G18/755C08G18/0866C08G18/348C08G18/44Y10T428/31554Y10T428/3158Y10T428/31601Y10T428/31551Y10T428/31507Y10T428/31565Y10T428/31587C08G18/12C08G18/3231C08G18/3228C08G18/3278C08G18/2875B62D33/04C09K3/18
Inventor W.S.克里西岩住正典R.G.拉卡斯
Owner SDC TECHNOLOGIES INC