Acryloxyalkoxysilicane modified acrylic acid ester polymerization emulsion and its preparation method and application

A technology of acryloyloxyalkoxysilane and acrylate, which is applied in the field of acrylate copolymer emulsion, can solve problems such as complex process, and achieve the effects of high reactivity, improved weather resistance, and no influence on reaction speed.

Inactive Publication Date: 2008-02-13
汉高股份两合公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Modified acrylate emulsion with acryloyloxyalkoxysilane can improve the tensile strength, abrasion resistance, solvent resistance and water resistance of the coating film, but the existing technology or process is complicated (such as the need for seed polymerization or radiation Initiate polymerization: see: Sima Wenlong, Song Lei, Anhui Chemical Industry, Vol.136, 2005(4), 23), or it is necessary to mix other types of unsaturated monomers (including highly volatile and toxic methacrylate monomers) body) and a relatively large amount of silane monomer can be used to achieve satisfactory results (see "Study on γ-methacryloxypropyltrimethoxysilane modified acrylate emulsion", Gong Xingyu, Fan Xiaodong, Polymer Materials Science and Engineering, Vol.19, No.1, Jan.2003: 62; Gui Qiang, et al., Chemical Building Materials, Issue 4, 2004(10): 8; and Chinese patent application CN1155635C of Wang Jian, Wang Chen, and Chen Dequan and CN1130437C, the authorization announcement date is June 30, 2004 and December 10, 2003 respectively)

Method used

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  • Acryloxyalkoxysilicane modified acrylic acid ester polymerization emulsion and its preparation method and application
  • Acryloxyalkoxysilicane modified acrylic acid ester polymerization emulsion and its preparation method and application
  • Acryloxyalkoxysilicane modified acrylic acid ester polymerization emulsion and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Example 1: Binary system: The monomer composition is butyl acrylate and γ-methacryloxypropyltrimethoxysilane (MPS). The formula of the emulsion is as follows:

[0086] serial number

[0087] Mix 39.60g of butyl acrylate, 1.98g of γ-methacryloxypropyltrimethoxysilane (MPS), 0.90g of emulsifier sodium lauryl sulfate, 84.00g of water, and 0.04g of dodecyl mercaptan. And buffer (NaH with pH 6.8 2 PO 4 Aqueous solution) 1.00g is added to a reactor equipped with heater, thermometer, feeding tube, reflux condenser, stirred at 480 rpm at room temperature for 20 minutes, then heated to 60°C, 0.10g initiator is added, and the temperature is raised to 75°C, During the reaction, the pH value was maintained at 7 and adjusted with 0.1 mol / L NaOH aqueous solution or HCl aqueous solution. After 6 hours of reaction, it was cooled to room temperature and filtered, and the pH value was adjusted to 8 with ammonia water. The monomer conversion rate reaches 95%. The solid content of t...

Embodiment 2

[0088] Example 2: Binary system: The monomer composition is butyl acrylate and γ-methacryloxypropyltrimethoxysilane (MPS). The formula of the emulsion is as follows:

[0089] serial number

[0090] Combine 39.60 g of butyl acrylate, 0.90 g of sodium lauryl sulfate as emulsifier, 84.00 g of water, 0.05 g of dodecyl mercaptan and buffer (NaH with a pH of 6.80) 2 PO 4 Aqueous solution) 1.01g is added to a reactor equipped with a heater, thermometer, feeding tube, reflux condenser, stirred at room temperature for 20 minutes, stirring speed at 480rpm, and then heated to 60°C, add 0.08g of initiator potassium persulfate, and set the temperature Raise to 75°C and react for 2 hours, when the conversion rate of monomer A reaches 70%, control the stirring speed at 380rpm, add 1.98g of acryloxyalkoxysilane B into the system at one time, during the reaction process Maintain pH at 7, adjust with 0.1 mol / L NaOH aqueous solution or HCl aqueous solution, after reacting for 2 hours, coo...

Embodiment 3

[0091] Example 3 (for electron microscopy observation): Binary system: The monomer composition is butyl acrylate and γ-methacryloxypropyltrimethoxysilane.

[0092] In order to increase the contrast of the binary components in the electron micrographs, the content of γ-methacryloxypropyltrimethoxysilane was increased to 10% by weight of the total amount of reactive monomers (BA+MPS). The formula of the emulsion is as follows:

[0093] serial number

[0094] 37.40g of butyl acrylate, 4.18g of γ-methacryloxypropyltrimethoxysilane (MPS), 1.00g of emulsifier sodium lauryl sulfate, 84.00g of water, and 0.02g of dodecyl mercaptan And buffer (NaH with pH 6.8 2 PO 4 Aqueous solution) 1.00g was added to the above-mentioned reaction kettle, stirred at 480rpm at room temperature for 20 minutes, then heated to 60°C, 0.09g of initiator was added, the temperature was raised to 75°C, and the pH value was maintained at 7 during the reaction, with 0.1 Adjust the mol / L NaOH aqueous soluti...

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Abstract

Disclosed are an acrylate emulsion modified by one or more acryloxyalkoxysilanes with a controllable latex particle shape, and a preparation method and application thereof. The emulsion of the present invention is obtained by the emulsion copolymerization of (meth)acryloyloxyalkoxysilane and acrylic acid hydrocarbyl ester, and it is not necessary to use methacrylate monomers with high volatility and toxicity, styrene and unsaturated acids. other types of unsaturated monomers. Using the relationship of the reactivity ratio in the reaction kinetics, by controlling the entry of the reaction raw materials, copolymers with different latex particle morphological structures can be obtained through emulsion polymerization. The copolymerization method is simple in operation, low in cost and environmentally friendly. The polymer product thus obtained has significantly improved certain mechanical properties. The emulsions can be used in buffer coatings, adhesives, sealants, gaskets, inks, and cleaning agents. The sealant made with this emulsion has good stability and can be placed stably for more than one year at room temperature. It can be widely used in sealing, coating and bonding of automobiles, building materials, daily products, etc.

Description

Technical field [0001] The invention relates to one or more acryloxy alkoxy silane modified acrylate copolymer emulsions, and a preparation method and application thereof. The emulsions prepared therefrom can be used for buffer coatings, adhesives, sealants, and pads. Tablets, inks, and cleaning agents. Background technique [0002] Acrylic emulsion has many outstanding advantages, such as excellent light resistance, weather resistance, acid and alkali resistance, corrosion resistance, and good oil resistance. At the same time, partly because of its low cost, the emulsion is widely used in automobiles, construction, electromechanical products and other fields. However, due to the need to improve the heat resistance, cold resistance, water resistance and solvent resistance of the acrylic emulsion, the emulsion still has shortcomings. [0003] Silicone resin has excellent properties such as flexibility, high temperature resistance, low temperature resistance, weather resistance and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/10C08F2/22C08F2/38C09D11/10C09D133/04C09J133/04C09K3/10C11D3/37C09D11/00
Inventor 贾叙东袭锴翁洋洋余学海
Owner 汉高股份两合公司
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