Composite latex of organic silicon resin and acrylic ester polymers, and preparation method thereof

A technology of acrylate and composite latex, which is applied in the field of composite latex of silicone resin and acrylate polymer and its preparation. Complicated reaction steps and other problems, to achieve the effect of mild conditions, simple operation and simple method

Inactive Publication Date: 2009-10-28

LANZHOU JIAOTONG UNIV

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Problems solved by technology

[0003] At present, in the research on the modification of acrylates by organosiloxanes, organosiloxanes or epoxy silanes containing unsaturated double bonds are mostly used for direct copolymerization with acrylates. Preparation of organosiloxane resin by hydrolysis and condensation under acidic conditions, the reaction steps are complex, a...

Abstract

The invention discloses a composite latex of silicone resin and acrylic polymer and a preparation method thereof. The preparation method of the present invention is prepared by hydrolyzing and condensing organosiloxane with quantitative water at a certain temperature under the catalysis of an acid, and using acrylic monomer as a solvent to dissolve and disperse the organosilicon resin, Then, the composite latex is obtained through pre-emulsification and polymerization reaction of an emulsifier. The method of the invention is simple, the conditions are moderate, the synthesis is easy, and the obtained product has good stability and excellent performance.

Technology Topic

SolventSilicone resin +10

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Examples

Experimental program(9)

Example Embodiment

[0033] [Example 1]

[0034] The organosiloxane uses methyltrimethoxysilane, and its component formula is shown in Table 1.

[0035]

[0036] (1) Preparation of silicone resin: In a three-necked flask with a condensing device and a stirring device, add methyltrimethoxysilane, methyl methacrylate, butyl acrylate, acrylic acid and metered water (2.0 g), React at a temperature of 20°C for 30 hours to prepare a silicone resin acrylate solution.

[0037] (2) Pre-emulsification process: Dissolve sodium lauryl sulfate in 5 grams of water, add it to the acrylate solution of methyltrimethoxysilane resin prepared in step (1), and stir at high speed at 30°C (1000r/ min) 1.0 hour to prepare a pre-emulsion. Dissolve sodium hydroxide in 108 grams of water, slowly drip it into the pre-emulsion with a constant pressure funnel, and finish dripping in 0.5 hours. Keep high-speed stirring during the dripping process to prepare the pre-emulsion.

[0038](3) Polymerization reaction: Dissolve potassium persulfate in 5 grams of water, add it to the pre-emulsion prepared in step (2), and react at 65°C for 6 hours under nitrogen protection with a stirring speed of 300r/min to obtain methyl Trimethoxysilane/acrylate composite latex.

Example Embodiment

[0039] [Example 2]

[0040] The organosiloxane uses methyltrimethoxysilane, but the amount is larger than that in [Example 1], and its composition is shown in Table 2.

[0041]

[0042] (1) Preparation of silicone resin: Add 3.0 grams of methyltrimethoxysilane, ethyl methacrylate, ethyl acrylate, methacrylic acid and 5% hydrochloric acid in a three-necked flask equipped with a condensing device and a stirring device , Reacting at a temperature of 45° C. for 10 hours to prepare a silicone resin acrylate solution.

[0043] (2) Pre-emulsification process: Dissolve OP-10 in 10 grams of water, add it to the acrylate solution of organosiloxane resin prepared in step (1), and stir at high speed (1000r/min) at 50°C for 10 minutes. Get pre-emulsion. Dissolve sodium carbonate in 102 grams of water, slowly drip it into the pre-emulsion with a constant pressure funnel, and finish dripping in 0.5 hours. Keep high-speed stirring during the dripping process to prepare the pre-emulsion.

[0044] (3) Polymerization reaction: Dissolve ammonium persulfate in 8 grams of water, add it to the pre-emulsion prepared in step (2), and react at 84°C for 2 hours under nitrogen protection with a stirring speed of 1000r/min to obtain methyl Trimethoxysiloxane/acrylate composite latex.

Example Embodiment

[0045] [Example 3]

[0046] The organosiloxane uses a mixture of methyltrimethoxysilane and dimethyldiethoxysilane. The group distribution is shown in Table 3.

[0047]

[0048]

[0049] (1) Preparation of silicone resin: In a three-necked flask with a condensing device and a stirring device, add methyltrimethoxysilane, dimethyldiethoxysilane, propyl methacrylate, methyl acrylate, and acrylic acid. Butyl ester, acrylic acid and metered water (3.0 g) were reacted at a temperature of 45° C. for 10 hours to prepare a silicone resin acrylate solution.

[0050] (2) Pre-emulsification process: Dissolve OP-10 and sodium dodecylbenzene sulfonate in 12 grams of water, and add them to the acrylate solution of organosiloxane resin prepared in step (1), at a high speed at 50°C. Stirring (1000r/min) for 30 minutes to prepare a pre-emulsion. Dissolve sodium hydroxide in 97 grams of water, slowly drip it into the pre-emulsion with a constant pressure funnel, and finish dripping in 0.5 hours. Keep high-speed stirring during the dripping process to prepare the pre-emulsion.

[0051] (3) Polymerization reaction: Dissolve ammonium persulfate in 8 grams of water, add it to the pre-emulsion prepared in step (2), and react at 84°C for 2 hours under nitrogen protection with a stirring speed of 400r/min to prepare silicone Oxyane/acrylate composite latex.

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Classification and recommendation of technical efficacy words

ease of conditions
simple response

Composite latex of organic silicon resin and acrylic ester polymers, and preparation method thereof

A technology of acrylate and composite latex, which is applied in the field of composite latex of silicone resin and acrylate polymer and its preparation. Complicated reaction steps and other problems, to achieve the effect of mild conditions, simple operation and simple method

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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