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Fluorine-containing block copolymer and application thereof

A technology of block copolymer and polymerization reaction, which is applied in fiber treatment, textiles and papermaking, etc. It can solve the problems of insufficient water and oil repellency, prohibition, poor washing durability, etc., and achieve excellent water and oil repellency. Excellent durability and emulsion stability

Active Publication Date: 2014-05-14
太仓中化环保化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is known that when the carbon number of the perfluoroalkyl group of the methacrylic acid-based comonomer used is less than 8, the water and oil repellent processing agent appears: Even if the amount of perfluoroalkyl unit is high, the water and oil repellency performance is still not good. Sufficient problem, and the problem of poor washing durability
Although the use of methacrylic acid-based comonomers with higher carbon number (more than 8) perfluorinated chain segments can significantly improve the water and oil repellency, however, due to the presence of biological Accumulation and certain biological toxicity, the current relevant bills have been promulgated and will be banned

Method used

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  • Fluorine-containing block copolymer and application thereof
  • Fluorine-containing block copolymer and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]In a 500ml four-necked flask, 100g of perfluorohexylethyl methacrylate, 300g of benzotrifluoride, 1.5g of ethyl α-bromoacetate, N,N,N',N,'N''-pentamethyl Diethylenetriamine 3.0g, cuprous bromide 2.0g, pass into nitrogen replacement, wait for the oxygen content to fall below 100ppm, heat up to 80 ℃, after reacting for 6 hours, the conversion rate is greater than 98% by gas chromatography detection; Inject 160g of octadecyl acrylate into the system, and the temperature rises to 110°C. After 30 hours of reaction, the conversion rate detected by gas chromatography is greater than 98%; inject 30g of isobornyl methacrylate into the system, and after 10 hours of reaction, pass The conversion rate detected by chromatography is greater than 99%, and then 10g of N-methylolacrylamide is injected into the system. After 2 hours of reaction, the conversion rate is detected by gas chromatography to be greater than 99%. Air is introduced, the temperature is lowered, and the reaction is t...

Embodiment 2～6

[0032] According to the monomer composition and proportion shown in Table 1, the same steps as in Example 1 were repeated to finally obtain a solution with a solid content of 50 wt%. The weight average molecular weight of the obtained fluorine-containing block copolymer is shown in Table 1.

[0033] Table 1

[0034]

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Abstract

The invention relates to a fluorine-containing block copolymer which is obtained through polymerization reaction of a polymerization monomer. The polymerization monomer consists of 15%-65% of monomer A, 1%-10% of monomer D and the balance of monomer B and / or monomer C, wherein a general formula of the monomer A is CH2=C(x)-COO-CH2CH2-Rf, the x represents H, Cl, F or CH3, and the Rf represents tridecafluorohexyl or perfluoro butyl. The monomer B is acrylic acid alkyl ester or methacrylic acid alkyl ester with crystallizable alkyl side chain. The monomer C is acrylic acid alkyl ester or methacrylic acid alkyl ester with homopolymer glass-transition temperature larger than 60 DEG C. A general formula of the monomer D is CH2=C(y)-COR1-(CH2)d-OH, wherein the y represents H or CH3, the R1 represents O or NH, and the d is an integer ranging from 1 to 6. A water-repellent oil-repellent agent prepared by adopting the fluorine-containing block copolymer has excellent water-repellent oil-repellent finishing effect and is free of biotoxicity.

Description

technical field [0001] The invention relates to a fluorine-containing block copolymer and its application. Background technique [0002] Fluorine-containing polymers have many excellent properties, such as excellent water and oil repellency. It is well known to apply perfluoroalkylethyl (meth)acrylate copolymers to the preparation of water and oil repellent finishing agents. [0003] It is known that when the carbon number of the perfluoroalkyl group of the methacrylic acid-based comonomer used is less than 8, the water and oil repellent processing agent appears: Even if the amount of perfluoroalkyl unit is high, the water and oil repellency performance is still not good. Adequate problem, and the problem of poor washing durability. Although the use of methacrylic acid-based comonomers with higher carbon number (more than 8) perfluorinated chain segments can significantly improve the water and oil repellency, however, due to the presence of biological Accumulation and cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00D06M15/29
Inventor 顾子旭梁成锋陈俊李全义鲜毅
Owner 太仓中化环保化工有限公司