A kind of preparation method of fluorine-containing pure acrylic emulsion
A pure acrylic emulsion and emulsifier technology, applied in the field of emulsion polymerization, can solve the problems of high gel rate and low monomer conversion rate, and achieve the effect of low gel rate, high monomer conversion rate and uniform particle size distribution
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Embodiment 1
[0047] The percentage content of each component of fluorine-containing pure acrylic emulsion is shown in Table 1:
[0048] Table 1 Percentage of each component
[0049] project
percentage(%)
water
80
soft monomer
6.67
hard monomer
13.33
0.6
Fluorinated monomer
1.0
Initiator
0.04
Emulsifier
0.08
Chelating agent
0.01
Terbutanthiol
0.01
Quinol
0.002
[0050] The preparation method is as follows:
[0051]1. Mixing section: Add water to adjust the concentration of soft and hard monomers to 30%, Tmax=50±5°C, holding time for 30 minutes, nitrogen gas, stirring speed at 200rpm,
[0052] 2. High-speed shear section: Tmax=50±5°C, holding time 30 minutes, stirring speed 900rpm,
[0053] 3. Reaction section: Tmax=80±5℃, holding time 320 minutes, stirring speed 200rpm,
[0054] 4. Termination section: add hydroquinone to terminate the reaction, add rem...
Embodiment 2
[0058] The percentage content of each component of fluorine-containing pure acrylic emulsion is shown in Table 2:
[0059] Table 2 Percentage of each component
[0060] project
percentage(%)
water
80
soft monomer
6.67
hard monomer
13.33
0.6
Fluorinated monomer
2.0
Initiator
0.04
Emulsifier
0.08
Chelating agent
0.01
Terbutanthiol
0.01
Quinol
0.002
[0061] See Example 1 for the preparation method.
[0062] The test result of the fluorine-containing pure acrylic emulsion prepared by the above steps is:
[0063] Monomer conversion rate: 99.0%; Gel rate 2.5%; Appearance: Blu-ray milky white liquid; Solid content: 23.8%; Average particle size 0.67μm; pH=4.1; Storage stability: No delamination or demulsification after 6 months of storage and precipitation phenomena.
Embodiment 3
[0065] The percentage content of each component of fluorine-containing pure acrylic emulsion is shown in Table 3:
[0066] Table 3 Percentage of each component
[0067] project
percentage(%)
water
80
soft monomer
6.67
hard monomer
13.33
functional monomer
0.6
Fluorinated monomer
1.0
Initiator
0.04
Emulsifier
0.16
Chelating agent
0.01
Terbutanthiol
0.01
Quinol
0.002
[0068] See Example 1 for the preparation method.
[0069] The test result of the fluorine-containing pure acrylic emulsion prepared by the above steps is:
[0070] Monomer conversion rate: 99.1%; gel rate 1.5%; appearance: blue light milky white liquid; solid content: 22.8%; average particle size 0.35μm; pH=4.2; storage stability: no delamination or demulsification after 6 months of storage and precipitation phenomena.
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