A kind of room temperature ketone hydrazine self-crosslinking acrylic resin emulsion and its preparation method and application

A self-crosslinking acrylic and resin emulsion technology, applied in the direction of adhesive types, adhesives, ester copolymer adhesives, etc., can solve the problems of low adhesion of substrates, reduced adhesion, etc., to increase molecular weight, ensure The tear film does not stick to the hand, and the effect of accelerating the drying rate at room temperature

Active Publication Date: 2020-10-23
SOUTH CHINA AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to have low adhesion to the substrate, the matrix resin contains as few hydroxyl groups and carboxyl groups as possible, thereby reducing the adhesion
However, water-based acrylic resins must contain a large number of hydrophilic carboxyl groups to ensure their hydrophilicity, so traditional water-based acrylic resins have high adhesion

Method used

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  • A kind of room temperature ketone hydrazine self-crosslinking acrylic resin emulsion and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 30g water, 1g initiator sodium persulfate and 0.1g buffer sodium bicarbonate as a bottom solution in a 500mL four-necked flask equipped with a stirrer, condenser, thermometer and water bath, and stir well. 100g water, 30g methyl methacrylate, 10g styrene, 50g butyl acrylate, 10g 5-sulfonyl-1-pentene, 10g diacetone acrylamide, 5g sodium lauryl sulfate, 3.5g Sodium sulfate and 5 g of dodecyl mercaptan were mixed, stirred at a rotation speed of 300 r / min for 30 minutes and mixed uniformly to prepare a pre-emulsion. After the temperature in the flask is raised to 80°C, 10wt% of the above-mentioned pre-emulsion is pre-injected into the flask with the preheated bottom material at one time to serve as the reaction "seed". After about 30 minutes, the bottom of the flask began to glow blue, and then use a peristaltic pump to slowly drip the remaining pre-emulsion into the four-necked flask for about 3 hours; after the addition, the temperature was raised to 85°C and the tempe...

Embodiment 2

[0032] Add 45 g of water, 2 g of initiator ammonium persulfate and 0.5 g of buffer sodium bicarbonate to a 500 mL four-neck flask equipped with a stirrer, condenser, thermometer, and water bath as the bottom solution, and stir well. Mix 80g water, 25g methyl methacrylate, 25g styrene, 70g butyl acrylate, 15g sodium allyl sulfonate, 10g diacetone acrylamide, 1g sodium dodecylbenzene sulfonate, 10g ammonium persulfate, 3g Mercaptoethanol was mixed, stirred at a speed of 600r / min for 30min and mixed uniformly to prepare a pre-emulsion. After the temperature in the flask is raised to 75°C, 10wt% of the above-mentioned pre-emulsion is pre-injected into the flask with the preheated bottom material at one time to serve as the reaction "seed". After about 45 minutes, the bottom of the flask began to glow with blue light, and then use a peristaltic pump to slowly drip the remaining pre-emulsion into the four-necked flask for about 2 hours. After the addition, the temperature was raised ...

Embodiment 3

[0034] Add 30g water, 1g initiator potassium persulfate and 0.2g buffer potassium bicarbonate as the bottom solution in a 500mL four-neck flask equipped with a stirrer, condenser, thermometer, and water bath, and stir well. Mix 100g water, 30g methyl methacrylate, 10g styrene, 50g butyl acrylate, 10g 5-sulfonyl-1-pentene, 5g diacetone acrylamide, 5g dodecyl diphenyl ether disulfonic acid Sodium, 3.5g potassium persulfate, 1g lauryl mercaptan were mixed, stirred for 30 min at a rotation speed of 300 r / min, and mixed uniformly to prepare a pre-emulsion. After the temperature in the flask is raised to 78°C, 10wt% of the above-mentioned pre-emulsion is pre-injected into the flask with the preheated bottom material at one time to serve as the reaction "seed". After about 30 minutes, the bottom of the flask began to glow with blue light, and then use a peristaltic pump to slowly drip the remaining pre-emulsion into the four-necked flask for about 2.5 hours. After the addition, the te...

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Abstract

The invention belongs to the technical field of organic high molecule materials, and discloses a normal-temperature ketone-hydrazine self-crosslinking acrylic resin emulsion as well as a preparation method and application thereof. The method comprises the following steps: uniformly mixing 30 to 45 parts by weight of water, 1 to 2 parts by weight of initiator and 0.1 to 0.5 part by weight of pH buffering agent, adding 10 to 15 percent by weight of pre-emulsion, heating to 75 to 80 DEG C for reacting for 30 to 40 minutes, adding the remaining pre-emulsion into a system dropwise, heating to 80 to85 DEG C, and preserving heat for reacting for 1 to 2 hours to obtain an acrylic emulsion; adjusting the pH of the emulsion system to 7 to 9, adding 1 to 10 parts of adipic acid dihydrazide, and stirring for 10 to 20 minutes to obtain the normal-temperature ketone-hydrazine self-crosslinking acrylic resin emulsion. The normal-temperature ketone-hydrazine self-crosslinking acrylic resin emulsion has higher comprehensive performance, is tack-free to hands in peeling of the membrane, can completely meet the application performance requirement on water-based peelable glue, and can be applied to the field of water-based peelable glue.

Description

Technical field [0001] The invention belongs to the technical field of organic polymer materials, and in particular relates to a normal temperature ketone hydrazine self-crosslinking acrylic resin emulsion and a preparation method and application thereof. Background technique [0002] The water-based peelable glue has strong water resistance, oil resistance, corrosion resistance and insulation. After spraying it on the surface of the object, a peelable film is formed to prevent dirt, rust, acid and alkali, and scratch It hurts the new state of mind when you tear off the film, and will not damage the surface of the protective body during the process of tearing off the film. The tear film does not stick to your hands, so it is widely used in packaging engineering. Since water-based peelable adhesives are often sprayed for construction, this requires that the peelable adhesives have good stability and low viscosity to meet the construction requirements. At present, the commonly use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F212/08C08F228/02C08F210/14C08F220/58C09J133/08
CPCC08F220/18C09J133/08C09J141/00C08F220/1804C08F220/14C08F212/08C08F210/14C08F220/58C08F228/02
Inventor 袁腾梁斌肖亚亮李小平杨卓鸿
Owner SOUTH CHINA AGRI UNIV
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