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A kind of organosilicon-modified waterborne acrylate resin and preparation method thereof

A technology of water-based acrylate and silicone, which is applied in the field of silicone-modified water-based acrylate resin and its preparation, can solve the problems of expensive raw materials, complicated process, and difficult gelation, etc. Simple, excellent effect of solvent resistance

Active Publication Date: 2015-12-09
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Ren Xiaoliang and others used a self-made silicone oligomer (synthesized with octamethylcyclotetrasiloxane, γ-methacryloxypropyltrimethoxysilane and trimethylchlorosilane as raw materials containing three Silicone oligomer containing siloxane segment and carbon-carbon unsaturated double bond) as a modifier, the obtained silicone acrylic emulsion has a comb structure, the water resistance of the coating film is significantly improved, and it is not easy to coagulate during free radical copolymerization [Refer to: Ren Xiaoliang et al., Combing Silicone Modified Acrylic Resin Research], but it has no practical use value, and the raw materials used to synthesize silicone oligomers are expensive, the process is complicated, and the reaction end point is not easy to control

Method used

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  • A kind of organosilicon-modified waterborne acrylate resin and preparation method thereof
  • A kind of organosilicon-modified waterborne acrylate resin and preparation method thereof
  • A kind of organosilicon-modified waterborne acrylate resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment one control NCO:OH is 2:1

[0051] (1) Add 40.29g (120°C vacuum dehydration for 2h) of hydroxyl silicone oil (average molecular weight is about 300), 0.1g of di-n-butyltin dilaurate and 59.71g of isophorone diisocyanate into a four-necked flask. The reaction was stirred at ℃ for 1-3 hours, and the NCO was tested every half hour until the NCO content was 5.6 wt%, and the reaction was stopped.

[0052] (2) Lower the reaction temperature of step (1) to 60°C, add 17.48g of hydroxyethyl methacrylate and 0.14g of hydroquinone, react for 1-1.5h, take samples for infrared testing every half hour, until 2270cm -1 Absorption peaks appear everywhere, and the reaction stops.

[0053] (3) The reaction temperature of step (2) is lowered to room temperature, and 145g methyl methacrylate, 6g methacrylic acid, 149g n-butyl acrylate, 600g deionized water, 8g sodium dodecylbenzenesulfonate and 4g Triton 100, stirred at a high speed until it was in the form of an emulsion to o...

Embodiment 2

[0059] Embodiment two control NCO:OH is 2:1

[0060] (1) Add 40.29g (120°C vacuum dehydration for 2h) of hydroxyl silicone oil (average molecular weight is about 300), 0.1g of di-n-butyltin dilaurate and 59.71g of isophorone diisocyanate into a four-necked flask. The reaction was stirred at ℃ for 1-3 hours, and the NCO was tested every half hour until the NCO content was 5.6 wt%, and the reaction was stopped.

[0061] (2) Lower the reaction temperature of step (1) to 60°C, add 17.48g of hydroxyethyl methacrylate and 0.14g of hydroquinone, react for 1-1.5h, take samples for infrared testing every half hour, until 2270cm -1 Absorption peaks appear everywhere, and the reaction stops.

[0062] (3) The reaction temperature of step (2) is down to room temperature, add 200g methyl methacrylate, 6g methacrylic acid, 94g n-butyl acrylate, 600g deionized water, 8g sodium dodecylbenzenesulfonate and 4g Triton 100, stirred at a high speed until it was in the form of an emulsion to obtai...

Embodiment 3

[0068] Embodiment 3 Control NCO:OH=1.2:1

[0069] (1) Add 52.93g (120°C vacuum dehydration for 2h) of hydroxyl silicone oil (average molecular weight is about 300), 0.1g of di-n-butyltin dilaurate and 47.07g of isophorone diisocyanate into a four-necked flask. The reaction was stirred at ℃ for 1-3 hours, and the NCO was tested every half hour until the NCO content was 5.6 wt%, and the reaction was stopped.

[0070] (2) Lower the reaction temperature of step (1) to 60°C, add 5.51g of hydroxyethyl methacrylate and 0.07g of hydroquinone, react for 1 to 1.5 hours, take samples for infrared testing every half hour, until 2270cm -1 Absorption peaks appear everywhere, and the reaction stops.

[0071] (3) The reaction temperature of step (2) is lowered to room temperature, and 216g methyl methacrylate, 6g methacrylic acid, 78g n-butyl acrylate, 600g deionized water, 8g sodium dodecylbenzenesulfonate and 4g Triton 100, stirred at a high speed until it was in the form of an emulsion t...

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Abstract

The invention relates to the technical field of high-molecular materials and preparation thereof, and discloses organic silicon modified water-based acrylate resin and a preparation method thereof. The preparation method comprises the following steps: firstly enabling excessive diisocyanate to react with a certain molecular weight of hydroxyl silicone oil to generate an NCO end-capped silicone oil polyurethane prepolymer; then adding hydroxyl (methyl)-containing acrylate, and reacting to generate a double-bond end-capped oligomer; emulsifying the obtained oligomer and other (methyl) acrylate together to prepare pre-emulsified liquid; and finally carrying out emulsion polymerization to obtain an organic silicon modified acrylate resin emulsion. According to the method, adopted raw materials are cheap and easy to obtain; a synthesis process is simple, easy to control, and gel cannot be adhered to a kettle; the organic silicon can be more added, and the stability of a polymer can not be influenced; the modified water-based acrylate resin has more excellent high-temperature after-tack resistance, scratch resistance and solvent resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and their preparation, and relates to an acrylate resin and a modification method thereof, in particular to an organosilicon-modified waterborne acrylate resin and a preparation method thereof. Background technique [0002] Acrylic resin is a high-molecular material with strong adhesion and high film-forming properties. It has excellent film-forming properties, good oil resistance and weather resistance, and excellent adhesion. Strong adhesion, with the characteristics of self-drying at room temperature, and rich sources of raw materials, easy to implement production. However, the structure of acrylic resin is generally a chain-like linear structure, which is extremely sensitive to temperature. As the temperature rises, it will gradually become soft and viscous; , so the coating cannot withstand climate change in winter and summer; in addition, the film made of acrylic resin is not resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/06C08F220/14C08F220/06C08F220/18C08F2/26C08G18/61C08G18/83
Inventor 许迁吴智华
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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