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Organic silicone 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, and can solve problems such as poor environmental protection, weather resistance, emulsion stability, coating film mechanical strength, solvent resistance and unsatisfactory functionality. , to achieve the effect of improving stability and water resistance and reducing VOC emissions

Inactive Publication Date: 2015-12-30
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the organosilicon modification of acrylate adhesives mainly has the following defects: most of the modified monomers use silane monomers or coupling agents to modify acrylates, and the weather resistance of the prepared products, the stability of the emulsion, the mechanical properties of the coating film, etc. Strength, solvent resistance, and functionality are not ideal; most of them use surfactant OP containing alkylphenol polyoxyethylene ether (APEO) as emulsifier, which has poor environmental protection. In addition, conventional emulsifiers are easy to desorb from polymer particles. or migrate in latex membranes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 is composed of the following substances in parts by weight: 5 methyl acrylate, 8 butyl acrylate, 0.5 glycidyl acrylate, 10 octamethylcyclotetrasiloxane (D4), 5.0 sodium alkyl vinyl sulfonate , potassium persulfate 0.5, deionized water 71

[0027] Firstly, potassium persulfate is added to the catalyst tank equipped with deionized water, and stirred evenly to obtain the initiator solution A with a concentration of 2.5%; methyl acrylate, butyl acrylate, glycidyl acrylate, octamethylcyclotetrasiloxane Mix alkanes (D4) in the premixing tank evenly to obtain the mixed phase B of polymerized monomers; add sodium alkyl vinyl sulfonate and deionized water into the four-necked flask, maintain the rotation speed at 200r / min, and heat to 80°C , slowly drop the homogeneously mixed monomer mixed phase B and 90% initiator solution A for 2 hours, and keep the polymerization temperature at 80°C during the reaction process; Add the remaining 10% initiator solution A dropwise; ...

Embodiment 2

[0028] Example 2 is composed of the following substances in parts by weight: methyl methacrylate 15, octyl acrylate 12, glycidyl methacrylate 0.5, hexamethylcyclotrisiloxane (D3) 5.0, dodecyl Sodium allyl succinate 2.0, ammonium persulfate 0.5, deionized water 65

[0029] First, ammonium persulfate is added to the catalyst tank equipped with deionized water, and stirred evenly to obtain a solution A with a concentration of 2.5%; methyl methacrylate, octyl acrylate, glycidyl methacrylate, hexamethyl Mix cyclotrisiloxane (D3) evenly in the premixing tank to obtain the mixed phase B of polymerized monomers; add sodium dodecyl allyl succinate and deionized water into the four-necked flask, and maintain the rotation speed at 250r / min, after heating to 70°C, slowly add the uniformly mixed monomer mixed phase B and 90% initiator solution A for 3 hours, and keep the polymerization temperature at 70°C during the reaction process; after the dropwise addition, the temperature rises to 9...

Embodiment 3

[0030] Example 3 is composed of the following substances in parts by weight: methacrylic acid 11, ethyl acrylate 15, glycidyl methacrylate 0.5, decamethylcyclopentasiloxane (D5) 6, sodium vinyl sulfonate 3 , ammonium persulfate 0.5, deionized water 64

[0031] Firstly, ammonium persulfate is added to the catalyst tank equipped with deionized water, and stirred evenly to obtain the initiator solution A with a concentration of 2.5%; methacrylic acid, ethyl acrylate, glycidyl methacrylate, decamethylcyclopentadiene Mix the siloxane (D5) evenly in the pre-mixing tank to obtain the mixed phase B of polymerized monomers; add sodium vinyl sulfonate and deionized water into the four-necked flask, maintain the rotation speed at 300r / min, and heat it to 90°C , slowly drop the uniformly mixed monomer mixed phase B and 90% initiator solution A for 1 hour, and keep the polymerization temperature at 90°C during the reaction process; Add the remaining 10% initiator solution A dropwise; when...

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Abstract

The invention relates to organic silicone modified acrylate emulsion and a preparation method thereof. The organic silicone modified acrylate emulsion is synthesized through a hard monomer, a soft monomer, a cross-linking monomer, an organic silicone monomer and a reactive emulsification monomer under the action of an initiator at one time; the preparation method comprises the following steps: dissolving the initiator into deionized water; uniformly mixing the hard monomer, the soft monomer, the cross-linking monomer and the organic silicone monomer in a premixing tank; adding an emulsifier and deionized water into a four-mouth flask to be heated to 70-90 DEG C, slowly dropwise adding the uniformly-mixed monomer mixed phase and 90% of an initiator solution for 1-3 h at the temperature of 70-90 DEG C and the rotating speed of 200-400 r / min, carrying out heat preservation for 1-3 h at the temperature of 70-90 DEG C after dropping, meanwhile, dropwise adding 10% of the residual initiator solution, and adding ammonia water for adjusting the PH to 6-8 after cooling to 50 DEG C or below. The migration of the emulsifier in a latex film is avoided through application of the reactive emulsifier and the defects of hot sticking and cold shortness of the pure acrylic resin are overcome through organic silicone modification.

Description

technical field [0001] The invention relates to the field of textile coatings, in particular to a silicone-modified acrylate emulsion and a preparation method thereof. Background technique [0002] The pigment printing process not only has the characteristics of bright color, complete color spectrum, high color yield and easy color matching, but also has the advantages of simple process flow, energy saving and low cost, so it has developed rapidly in recent years and has become more and more popular. The printing and dyeing industry attaches great importance to it. The pigment printing process mainly uses the adhesive film-forming substance to fix the pigment that is insoluble in water, has no affinity and reactivity to the fabric on the fabric, so as to achieve the purpose of coloring, so the performance of the adhesive will directly affect the printed product. the quality of. [0003] Acrylic resin has many outstanding advantages, such as excellent light resistance, weat...

Claims

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Application Information

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IPC IPC(8): C08F220/16C08F220/14C08F220/32C08F228/02C08F222/02C08F220/18C08F8/42D06P1/52
Inventor 曾显华贾永堂赵燕
Owner WUYI UNIV
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