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Preparation method of cationic fluorine-containing polyacrylate soap-free emulsion

A technology of fluorine-containing acrylate and fluorine-containing polyacrylic acid, which is applied in textiles, papermaking, fiber treatment, etc., can solve the problems of reducing emulsion stability, water and oil repellency, and avoid the use of color fixing agents and other substances. Good repellency Water and oil repellency, enhanced action force

Active Publication Date: 2014-09-10
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of cationic fluorine-containing polyacrylic acid soap-free emulsion, which solves the problem that the use of existing emulsifiers to prepare cationic fluorine-containing emulsion will reduce the stability of the emulsion and the water and oil repellency of the film

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  • Preparation method of cationic fluorine-containing polyacrylate soap-free emulsion

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preparation example Construction

[0024] The preparation method of cationic fluorine-containing polyacrylic acid soap-free emulsion of the present invention specifically comprises the following steps:

[0025] Step 1: Preparation of Mixed Monomers

[0026] According to the mass ratio of (35~50):(35~45):(10~20):(5~10), butyl acrylate, styrene, hexafluorobutyl methacrylate and methacryloyloxyethyl Trimethylammonium chloride is mixed evenly to obtain mixed monomers;

[0027] Step 2: Prepare the Seed Emulsion

[0028] In a reactor equipped with a stirrer, a condenser, a feeding device and a thermometer, add 2% to 5% of polymethacrylic acid N,N with active end groups of thiocarbonate relative to the mass of the mixed monomer obtained in step 1 Dimethylaminoethyl-b-polyhexafluorobutyl acrylate (N, N dimethylaminoethyl methacrylate-b-polyhexafluorobutyl acrylate has a relative molecular mass of 8000-12000 and a molecular weight distribution of 1.33- 1.46), the deionized water of 180%~230% relative to the mass of t...

Embodiment 1

[0038] Step 1: Preparation of Mixed Monomers

[0039] According to the mass ratio of 35:35:20:10, butyl acrylate, styrene, hexafluorobutyl methacrylate and methacryloyloxyethyltrimethylammonium chloride are uniformly mixed to obtain a mixed monomer;

[0040] Step 2: Prepare the Seed Emulsion

[0041] Add the PDMAEMA-b-PHFBA (the relative molecular mass of PDMAEMA-b-PHFBA is 8000, molecular weight distribution 1.33), the relative deionized water of 200% of the mass of the mixed monomer, the hydrochloric acid of 1 with a pH of 20% of the mass of the mixed monomer, and 25% of the mixed monomer obtained in step 1, at room temperature nitrogen gas and Stir at a speed of 1500r / min for 30min, change the rotational speed to 220r / min and raise the temperature to 60°C, add 0.4% azobisisobutylamidine hydrochloride aqueous solution relative to the mass of the mixed monomer, azobisisobutylamidine hydrochloride The mass ratio with water is 1:3, heat preservation for 30 minutes, to obtain ...

Embodiment 2

[0045] Step 1: Preparation of Mixed Monomers

[0046] According to the mass ratio of 50:40:10:8, butyl acrylate, styrene, hexafluorobutyl methacrylate and methacryloyloxyethyltrimethylammonium chloride are uniformly mixed to obtain a mixed monomer;

[0047] Step 2: Prepare the Seed Emulsion

[0048] Add the PDMAEMA-b-PHFBA (the relative molecular mass of PDMAEMA-b-PHFBA is 12000, molecular weight distribution 1.41), the deionized water of 180% of the relative mixed monomer quality, the acetic acid of 1 with the pH of 10% of the relative mixed monomer quality, and 28% of the mixed monomer obtained in step 1. Stir at a speed of 1200r / min for 45min, change the rotational speed to 240r / min and raise the temperature to 70°C, add 1.5% azobisisobutyramide hydrochloride aqueous solution relative to the mass of the mixed monomer, azobisisobutyramide hydrochloride The mass ratio with water is 1:5, heat preservation for 25 minutes to obtain seed emulsion;

[0049] Step 3: Preparation ...

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Abstract

The invention discloses a preparation method of a cationic fluorine-containing polyacrylate soap-free emulsion. The preparation method comprises the following steps: firstly, preparing a mixed monomer; secondly, adding deionized water, polymethylacrylic acid N,N-dimethylamino ethyl ester-b-hexafluorobutylpolyacrylate and an acid to a flask, and adding one part of the mixed monomer, heating and then adding the aqueous solution of an initiator to prepare a seed emulsion; finally, dropwise adding the aqueous solution of the initiator and the rest mixed monomer to the seed emulsion simultaneously, and reacting to obtain the cationic fluorine-containing polyacrylate soap-free emulsion. The preparation method of the cationic fluorine-containing polyacrylate soap-free emulsion has the advantages that the problem that the stability of the emulsion and the water repellency and oil repellency of a film can be reduced if the existing emulsifier is used for preparing the cationic fluorine-containing emulsion, the prepared emulsion is good in stability and acidic at last, and can be closely bonded with fabrics due to electrostatic interaction, the use of substances such as a color fixing agent is avoided, the acting force between the emulsion and the fabrics is enhanced, and the film still has excellent water repellency and oil repellency.

Description

technical field [0001] The invention belongs to the technical field of cationic soap-free emulsion polymerization, and in particular relates to a preparation method of cationic fluorine-containing polyacrylic acid soap-free emulsion. Background technique [0002] Fluorine-containing polyacrylate polymers contain fluorine-containing side chain groups and have low surface free energy. Therefore, on the basis of maintaining good film-forming properties, flexibility and adhesion of non-fluorine-containing polyacrylate polymers, Fluoropolymers have the advantages of good thermal stability, strong chemical inertness, water repellency, oil repellency and stain resistance, etc., and are widely used in waterproof finishing, oil repellent finishing and antifouling finishing of textiles. Cationic fluorine-containing emulsion is positively charged, and can be combined with various negatively charged fabrics by ionic bonds due to electrostatic action, so it has incomparable advantages in...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F212/08C08F220/22C08F220/34C08F2/28D06M15/277
Inventor 周建华陈欣彭颖姗马建中王海龙褚苗
Owner SHAANXI UNIV OF SCI & TECH
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