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A coating composition and a method of imparting a self-healing property and other properties onto a substrate

A composition and coating technology, applied in the direction of cyclodextrin coatings, zinc organic compounds, tin organic compounds, etc., can solve the problems of exposure to ultraviolet light, carbon dioxide, water or other external sources

Inactive Publication Date: 2018-03-13
NANO & ADVANCED MATERIALS INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, existing coating compositions exhibit self-healing properties only when externally treated, such as by exposure to UV light, carbon dioxide, water, or other external sources

Method used

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  • A coating composition and a method of imparting a self-healing property and other properties onto a substrate
  • A coating composition and a method of imparting a self-healing property and other properties onto a substrate
  • A coating composition and a method of imparting a self-healing property and other properties onto a substrate

Examples

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example 1

[0032] According to one embodiment of the present invention, the polymer (PCL-HDI) network is prepared by in situ polymerization of hexamethylene diisocyanate trimer (HDI) and polycaprolactone diol (PCL diol). The polymerization is carried out in the presence of bismuth neodecanoate or triethylamine catalysts. The polymer network is elastic and imparts self-healing properties to coatings formed from the coating compositions of the present invention. The polymer network is composed of HDI hard segment and PCL diol soft segment. Figure 2a The synthesis of a PCL diol-HDL polymer network according to one embodiment of the invention is shown. Figure 3a and 3b ATR-FTIR spectra of PCL diol-HDI polymer films in the presence of two different catalysts are shown. In this example, the isocyanate groups in the HDI react with the OH groups in the PCL diol to form urethane linkages, thereby forming a polyurethane network with hydrogen bonds for self-healing. Molar ratios of isocyanate...

example 2

[0035] According to one embodiment of the invention, the polymer (PCL triol-HDI) network is prepared by in situ polymerization of hexamethylene diisocyanate trimer and polycaprolactone triol. The polymerization is carried out in the presence of bismuth neodecanoate. The polymer network is elastic and imparts self-healing properties to coatings formed from the coating compositions of the present invention. The polymer network is composed of HDI hard segment and PCL triol soft segment.

example 3

[0037] The polymer network according to another embodiment of the present invention is composed of a polyurethane backbone formed by HDI and PEG and cyclodextrin as side chains. The cyclodextrin ring was introduced into PEG, and the -NCO group of HDI reacted with the -OH group of PEG in the presence of an organotin catalyst. Figure 4 A synthetic scheme for the HDI-PEG-cyclodextrin polymer network is shown. Figure 5 is the ATR-FTIR spectrum of HDI-PEG-cyclodextrin polymer. The self-healing ability is achieved through hydrogen bonding of the polyurethane backbone and the sliding and movement of cyclodextrin rings along the polyurethane chain.

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Abstract

The present invention provides a coating composition and a method of imparting self-healing, anti-microbial and anti-fouling properties onto a substrate at ambient temperature without external intervention. The coating composition comprises a product of an in-situ polymerization mixture comprising diisocyanate, polyol and saccharide. The polyol is polyester or polyether.

Description

technical field [0001] The present invention generally relates to compositions and methods for providing self-healing, antimicrobial, and antifouling coatings to various substrate surfaces. Background technique [0002] In industrial, commercial and domestic environments, coatings are commonly applied to surfaces to impart protection and surface functionality. Coatings can act as a protective barrier to protect the underlying substrate from corrosion, erosion, hostile environments, and abrasion. Coatings can also provide additional functionality to underlying substrates tailored to specific substrate applications. A self-healing coating is desirable; its ability to recover from scratches and cracks extends the useful life and reduces maintenance costs of the product or device on which the coating is applied. Coatings with antimicrobial properties are readily available and practical in the market. However, many existing antimicrobial and / or antifouling coating compositions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D5/14C09D5/16C08G18/79C08G18/42C08G18/64
CPCC08G18/4081C08G18/4277C08G18/6484C08G18/792C09D5/14C09D5/1662C09D175/06C09D105/16C07F3/06C08G18/4833C08G18/4854C08G18/6644C08G18/6677C08G18/73C08G18/18C08G18/227C08G18/246C08G18/283C08G18/3218C08B37/0012C09D175/04C08K5/56C07C53/128C07C211/05C07F7/22C08G18/3203C08G63/08C08G65/34C08L71/08
Inventor 陶宏李思越吴彦明金秋
Owner NANO & ADVANCED MATERIALS INST