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Silicon composite waterborne acrylic emulsion and preparation method thereof

A technology of water-based acrylic acid and butyl acrylate, which is applied in the field of architectural coatings and its preparation, can solve the problems of difficult dispersion of particles, poor color development, and high processing cost of silicon-acrylic emulsion, so as to prolong reaction time, improve film-forming performance, and improve exhibition color effect

Inactive Publication Date: 2016-01-06
佛山市顺德区巴德富实业有限公司
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AI Technical Summary

Problems solved by technology

The silicone resin in the silicone-acrylic emulsion has high hardness, molecular chain regularity and hydrophobicity. Although the silicone-acrylic emulsion has excellent water resistance and film-forming properties, due to the high degree of molecular chain regularity , the particles are difficult to disperse in the emulsion, which makes the color development extremely poor, and the processing cost of the silicone acrylic emulsion is relatively high

Method used

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  • Silicon composite waterborne acrylic emulsion and preparation method thereof

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preparation example Construction

[0023] The preparation method of silicon composite aqueous acrylic acid emulsion of the present invention comprises the following steps:

[0024] a: Preparation of pre-emulsion: Add water, butyl acrylate, methyl methacrylate, isooctyl acrylate, 0-100% of the total amount of functional monomers, and emulsifier to the pre-emulsification tank at normal temperature and pressure. Stir for 20-40 minutes to mix it into a uniform pre-emulsion;

[0025] b: Raise the temperature of the reactor to 85-90°C, add the initiator and 5-10% pre-emulsion, and control the temperature at 80-85°C, and the reaction time is 20-40 minutes;

[0026] c: Raise the temperature of the reactor to 85-90°C, and add the remaining pre-emulsion to the reactor dropwise for 2-8 hours, 1-3 hours before the completion of the above drop operation, at the same time to the reaction Add the remaining functional monomers in step a dropwise to the kettle, and ensure that the pre-emulsion and the functional monomers are a...

Embodiment 1

[0032] The silicon composite water-based acrylic emulsion of the present invention mainly includes water, butyl acrylate, methyl methacrylate, isooctyl acrylate, vinyltrimethoxysilane, phosphoric acid half ester ethoxylated alcohol disodium, alkyl diphenyl ether Disulfonate and ammonium persulfate, the contents of the above components are calculated by mass percentage: water 60%, butyl acrylate 5%, methyl methacrylate 20%, isooctyl acrylate 3%, vinyl trimethoxy Silane 10%, Disodium Phosphate Half Ethoxylate Alcohol 1%, Alkyl Diphenyl Ether Disulfonate 0.9%, Ammonium Persulfate 0.1%.

[0033] The preparation method of silicon composite aqueous acrylic acid emulsion of the present invention may further comprise the steps:

[0034] a: Preparation of pre-emulsion: Add water, butyl acrylate, methyl methacrylate, isooctyl acrylate, and emulsifier to the pre-emulsification tank at normal temperature and pressure, and stir for 20 minutes to form a uniform pre-emulsification liquid; ...

Embodiment 2

[0041] The silicon composite water-based acrylic emulsion of the present invention mainly includes water, butyl acrylate, methyl methacrylate, isooctyl acrylate, vinyl trimethoxysilane, methacryloxypropyl trimethoxysilane, methacrylic acid Allyl ester silicone polymer, glycidyl methacrylate silicone polymer, diacetone acrylamide / adipate dihydrazide silicone polymer, sodium dodecylbenzenesulfonate, ammonium persulfate, persulfuric acid Potassium and sodium persulfate, the contents of the above components are calculated by mass percentage: water 60%, butyl acrylate 10%, methyl methacrylate 10%, isooctyl acrylate 3.5%, vinyltrimethoxysilane 3% , Methacryloxypropyltrimethoxysilane 3%, Silicone Polymer of Allyl Methacrylate 3%, Silicone Polymer of Glycidyl Methacrylate 3%, Diacetone Acrylamide / Adipic Acid Silicon polymer of dihydrazide 3%, sodium dodecylbenzenesulfonate 1%, ammonium persulfate 0.2%, potassium persulfate 0.2%, sodium persulfate 0.1%.

[0042] The preparation method...

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Abstract

The invention discloses a silicon composite waterborne acrylic emulsion which is characterized by comprising the following components in percentage by mass: 60 percent of water, 5 to 10 percent butyl acrylate, 10 to 20 percent of methyl methacrylate, 3 to 8 percent of ethylhexyl acrylate, 10 to 15 percent of functional monomer, 1 to 3 percent of emulsifying agent and 0.1 to 0.5 percent of initiator. The silicon composite waterborne acrylic emulsion disclosed by the invention has good water resistance and excellent color contrast property.

Description

technical field [0001] The invention relates to an architectural paint and a preparation method thereof, in particular to a silicon composite water-based acrylic emulsion used for real stone paint and a preparation method thereof. Background technique [0002] Real stone paint is a widely used architectural coating in the construction industry, especially the middle and low-grade real stone paint, which has a huge demand. The existing real stone paint is mainly based on styrene-acrylic emulsion, and the styrene-acrylic emulsion itself is mainly composed of flexible molecular chains, so that it has the characteristics of good color development and high bonding strength. However, there are many hydrophilic groups in styrene-acrylic emulsion, which is easy to react with water, so its water whitening resistance is poor, and the strength of the paint film after soaking in water is low. In addition, due to the strong molecular chain flexibility of styrene-acrylic emulsion, its ...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F230/08C08F2/28C08F2/30C09D133/12
Inventor 曾庆乐杨文涛罗宇
Owner 佛山市顺德区巴德富实业有限公司
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