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Organic silicon modified acrylate emulsion and preparation method thereof

A technology of acrylate and silicone, which is applied in the field of silicone-modified acrylate emulsion and its preparation, can solve the problems of poor water resistance, stickiness, and brittleness, and achieve good emulsion stability, low reaction temperature, and high viscosity. strong bond effect

Inactive Publication Date: 2013-12-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, acrylate emulsions have disadvantages such as poor water resistance, easy stickiness at high temperature, and easy brittleness at low temperature, which limit its wider application, so it is necessary to modify it

Method used

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  • Organic silicon modified acrylate emulsion and preparation method thereof
  • Organic silicon modified acrylate emulsion and preparation method thereof
  • Organic silicon modified acrylate emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The application examples given below can synthesize the core-shell emulsion described in this patent, and the ratio of experimental raw materials is listed in Table 1.

[0050] ⑴ Pre-emulsification

[0051] ① Pre-emulsification of the core layer: add a part of the composite emulsifier, a part of deionized water, the acrylate mixed monomer of the core layer, and vinyl polysiloxane prepolymer into the pre-emulsification kettle a in sequence, and the temperature rises to 45±0.2 ℃, with a rotation speed of about 1000r / min, stir mechanically for 30-45 minutes to prepare the core layer pre-emulsion, pour it into the core layer pre-emulsion dripping kettle, and set aside.

[0052] ②Shell pre-emulsification: Add a part of compound emulsifier, a part of deionized water, shell acrylate mixed monomer, hydrophilic monomer, and cross-linking monomer into pre-emulsification kettle b in sequence, and raise the temperature to 45 ±0.2°C, stir mechanically for 30 minutes at a rotation s...

Embodiment 2

[0064] The preparation method is the same as in Example 1, and the reaction temperature, mechanical stirring speed, heat preservation time, etc. can be appropriately changed, wherein the experimental raw material proportioning is listed in Table 2.

[0065] Table 2 Components of silicone-modified acrylate emulsion with core-shell structure

[0066]

[0067] Note: 1) The emulsifier is divided into two parts, and the mass fraction of the core-shell layer is 63.00% and 37.00% respectively.

Embodiment 3

[0069] Preparation method is with embodiment 2, and wherein experimental raw material proportioning is listed in table 3.

[0070] Table 3 Components of silicone-modified acrylate emulsion with core-shell structure

[0071]

[0072] Note: 1) The emulsifier is divided into two parts, and the mass fraction of the core-shell layer is 66.00% and 34.00%, respectively.

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Abstract

The invention relates to organic silicon modified acrylate emulsion and a preparation method thereof. A core-shell structure synthesis method is adopted for preparation, a core layer / shell layer glass transition temperature is designed to be -30- -25 DEG C / 0-5 DEG C and lower than conventional core-shell emulsion. The emulsion comprises core-shell emulsion monomers, initiator accounting for 0.4-0.6% of the total mass of the monomers, composite emulsifier accounting for 2.5-4.5% of the total mass of the monomers, pH (potential hydrogen) buffering agent accounting for 0.4-0.6% of the total mass of the monomers and the balance deionized water. The emulsion preparation method includes (1) pre-emulsifying, (2) core-layer emulsion preparation, and (3) core-shell emulsion preparation. The emulsion which is aqueous emulsion is environment-friendly and high in stability, bonding power and tensile strength, has functions of softening, smoothening and the like for surface treatment of fabrics and the like, and is widely applicable to the fields of spinning, papermaking, leather, painting, water-based ink and the like.

Description

technical field [0001] The invention belongs to the field of acrylate water-based emulsions, in particular to an organosilicon-modified acrylate emulsion and a preparation method thereof. Background technique [0002] Acrylate emulsion has many outstanding advantages, such as excellent weather resistance, light resistance, acid and alkali corrosion resistance, good adhesion, and then has excellent decoration and durability, smooth coating surface, good stain resistance, construction range Wide range, low cost, high cost performance and other characteristics, it is widely used in textile, coating and other fields. However, acrylate emulsion has disadvantages such as poor water resistance, easy stickiness at high temperature, and brittleness at low temperature, which limits its wider application, so it is necessary to modify it. [0003] On the one hand, due to its low surface energy, high and low temperature resistance, and water resistance, silicone prepolymers or high poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/12C08F220/18C08F212/08C08F220/14C08F220/06C08F220/56C08F220/28C08F220/32C08F222/14C08F222/20C08F4/40C08F2/26C08F2/30
Inventor 徐小刚杜鹃罗艳钟毅汪娇宁
Owner DONGHUA UNIV