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Fluorinated copolymer, its production method, water and oil repellent composition and articles

A manufacturing method and technology of copolymers, applied in chemical instruments and methods, other chemical processes, coatings, etc., can solve problems such as decomposition and cutting, loss of perfluoroalkyl groups, reduction of water and oil repellency of articles, and achieve friction durability excellent effect

Active Publication Date: 2022-05-31
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ester bond in the (meth)acrylate-based unit is easily cleaved by hydrolysis by alkali, etc., photolysis by ultraviolet rays
Therefore, the perfluoroalkyl group may be lost from the fluorine-containing copolymer, and the water and oil repellency of the article may be reduced

Method used

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  • Fluorinated copolymer, its production method, water and oil repellent composition and articles
  • Fluorinated copolymer, its production method, water and oil repellent composition and articles
  • Fluorinated copolymer, its production method, water and oil repellent composition and articles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0219] Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not limited to these. Need to explain

[0221] The appearance of the fluorocopolymer dispersion liquid after polymerization was visually confirmed. Make the appearance uniform (there is no residue, layering

[0225] The fluorocopolymer is recovered from the dispersion or solution of the fluorocopolymer as follows. Dispersion of Fluorinated Copolymer

[0228] Column: Polymer laboratories, MIXED-C 300×7.5mm 5μm,

[0230] Flow rate: 1.0 mL / min, column oven temperature: 37°C, sample concentration: 1.0 mass%,

[0234] The fluorine-containing copolymer was dissolved in a mixed solvent of AK-225 / THF=5 / 5 (volume ratio) to prepare a solid concentration

[0239] Flow rate: 0.3 mL / min, column oven temperature: 40°C, sample concentration: 1 mass % (in liquid B)

[0241] Details of the aforementioned gradient conditions are as follows.

[0250] According to JIS R 3257: 1999 ...

example 1

[0267] The water and oil repellent composition was coated on the surface of the glass substrate degreased with acetone in advance, and the temperature was 200°C.

[0268] The contact angle of each of the above-mentioned droplets was measured on the article. The measurement results are shown in Table 1 as initial liquid repellency. Then, yes

example 2 and example 5～ example 8

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PUM

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Abstract

Provided: A fluorine-containing copolymer capable of obtaining an article excellent in water and oil repellency and friction durability. A fluorine-containing copolymer, which has: a unit based on the following monomer a and a unit based on the following monomer b, relative to the total number of moles of units constituting the aforementioned fluorine-containing copolymer, the number of units based on the monomer a The ratio is 20-50 mole %, the weight average molecular weight of the fluorine-containing copolymer is 20,000-100,000, and the half-value width W of the peak of the above-mentioned fluorine-containing copolymer in the chromatogram obtained by high-performance liquid chromatography is measured 1 Relative to peak width W 2 The ratio is 0.35 to 0.55. Monomer a: CH 2 =CH‑R f (R f : a compound represented by a perfluoroalkyl group having 1 to 8 carbon atoms). Monomer b: a monomer copolymerizable with monomer a.

Description

Fluorinated copolymer, its production method, water and oil repellent composition and articles technical field [0001] The present invention relates to a fluorine-containing copolymer, a method for producing the same, a water- and oil-repellent composition, and an article. Background technique As a method of imparting water and oil repellency to articles (resin surfaces, fiber products, porous substrates, etc.), there are known It can be obtained by dispersing a fluorine-containing copolymer containing a unit based on a (meth)acrylate having a perfluoroalkyl group in an aqueous medium. A method for treating articles with a water- and oil-repellent composition prepared. Furthermore, in recent years, the use of a A fluoropolymer of a perfluoroalkyl (meth)acrylate unit is an environmentally friendly type. However, based on (meth)propylene The ester bond in the unit of the acid ester is easily cleaved by hydrolysis by alkali or the like and photolysis by ultraviolet ray...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/18C08F218/08C09K3/18C08F2/22
CPCC08F218/08C08F2/22C09K3/18C09D127/12C08F214/186C09D131/04C08F214/18C08F14/18C08F2/24C08K3/18
Inventor 原弘之竹村元宏富塚雄二郎
Owner AGC INC