A kind of core-shell structure acrylate powder glue and preparation method thereof

An acrylate and core-shell structure technology, applied in the field of pressure-sensitive adhesives, can solve problems such as difficult application of complex and precise spaces, and restrictions on the use of water-based acrylate pressure-sensitive adhesives, and achieve long-term preservation, shortened preparation time, and production costs. low effect

Active Publication Date: 2020-02-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively strong adhesive performance of water-based acrylic pressure-sensitive adhesives, it is difficult to apply to some complex and precise spaces, such as the fixing of screw parts, which limits the use of water-based acrylic pressure-sensitive adhesives

Method used

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  • A kind of core-shell structure acrylate powder glue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Add 2.0g OP-10 to the Erlenmeyer flask, then add 50g of deionized water and magnetically stir until the emulsifier dissolves, then add 70g of butyl acrylate, 70g of isooctyl acrylate, 8g of hydroxyethyl acrylate, and 15g of vinyl acetate , 20 g of methyl methacrylate, 4 g of hydroxyethyl methacrylate, stirred (stirring speed 300 r / min) for 30 min to form a pre-emulsion.

[0032] 2) Add 0.2g NaHCO to a 500ml four-neck flask equipped with a thermometer, condenser, and stirring device 3 , then add 40ml of deionized water, the reaction temperature is 80°C, stir until dissolved; divide the pre-emulsion into two parts, add 30% mass of the pre-emulsion and 15g of ammonium persulfate aqueous solution dropwise at the same time, keep the temperature for 30min after 30min; The remaining pre-emulsion containing 4 drops of dodecyl mercaptan and 6 g of ammonium persulfate aqueous solution were added dropwise, and the addition was completed within 3.5 hours.

[0033] 3) The reacti...

Embodiment 2

[0037] 1) Add 2.0g of sodium lauryl sulfate to the Erlenmeyer flask, then add 45g of deionized water and magnetically stir until the emulsifier dissolves, then add 60g of butyl acrylate, 80g of isooctyl acrylate, 8g of hydroxyethyl acrylate, and acetic acid 10 g of vinyl ester, 25 g of methyl methacrylate, and 4 g of hydroxyethyl methacrylate were stirred (stirring speed 300 r / min) for 20 min to form a pre-emulsion.

[0038] 2) Add 0.3g NaHCO to a 500ml four-necked flask equipped with a thermometer, condenser, and stirring device 3 , then add 40ml of deionized water, the reaction temperature is 80°C, stir until dissolved; add 30% pre-emulsion and 15g ammonium persulfate aqueous solution dropwise at the same time, keep warm for 30min after 30min; then add the remaining pre-emulsion and 6g persulfate simultaneously Aqueous ammonium solution was added dropwise in 3 hours.

[0039] 3) The reaction temperature was raised to 90° C., and the temperature was kept for 1.5 h under stir...

Embodiment 3

[0043]1) Add 2.0g of nonylphenol polyoxyethylene ether ammonium sulfate to the Erlenmeyer flask, then add 50g of deionized water and magnetically stir until the emulsifier dissolves, then add 70g of butyl acrylate, 70g of isooctyl acrylate, and hydroxyethyl acrylate 8g, vinyl acetate 10g, methyl methacrylate 25g, hydroxyethyl methacrylate 4g, stirred (stirring speed 300r / min) for 30min to form a pre-emulsion.

[0044] 2) Add 0.2g NaHCO to a 500ml four-neck flask equipped with a thermometer, condenser, and stirring device 3 , then add 50ml of deionized water, the reaction temperature is 75 ° C, stir until dissolved; dropwise add 30% pre-emulsion and 15g ammonium persulfate aqueous solution at the same time, keep the temperature for 30min after 40min; then add the remaining pre-emulsion and 6g persulfate at the same time Aqueous ammonium solution was added dropwise in 3.5 hours.

[0045] 3) The reaction temperature was raised to 85° C., and kept under stirring condition for 1 h...

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Abstract

The invention discloses a waterborne acrylate adhesive powder with a core-shell structure and a preparation method thereof. The preparation method comprises the following steps of firstly, adding an emulsifier into water; then, adding a soft monomer, a hard monomer and a functional monomer, uniformly mixing, and magnetically stirring, so as to form a pre-emulsifier; heating to 75 to 80 DEG C, adding a buffer solution into a reactor, dripping 20 to 50% of pre-emulsifier by mass and 1 / 2 to 3 / 4 of initiator by mass under the N2 (nitrogen) atmosphere, and stirring to react, so as to prepare a primary emulsifier; after warming, dripping the left initiator and pre-emulsifier, adding a chain transfer agent, warming for 1 to 2h after the dripping is finished, cooling, and discharging the material;adding a coupling agent, nanometer calcium carbonate or SiO2 (silicon dioxide) and a polyvinyl alcohol water solution, dispersing, treating by ultrasonic waves at room temperature, spraying, and drying. The waterborne acrylate adhesive powder has the advantages that the environment-friendly and non-toxic effects are realized; the adhering property is guaranteed, and the good water-resistant property is realized; the waterborne acrylate adhesive powder can be used under the complicated and precise conditions; the production cost is low, the operation is simple, and the required time is short.

Description

technical field [0001] The invention relates to a pressure-sensitive adhesive, in particular to a water-based acrylate powder adhesive with a core-shell structure and a preparation method thereof; belonging to the field of pressure-sensitive adhesive material manufacturing. Background technique [0002] Water-based acrylate pressure-sensitive adhesives have developed rapidly in recent years and are widely used in medical tapes, labels, conductive adhesives, surface protection tapes and pressure-sensitive labels. Low, safe, pollution-free, easy synthesis operation, short polymerization time, strong rheological controllability, etc.; with the improvement of environmental awareness, non-toxic, non-polluting water-based acrylic adhesives are increasingly valued, and its demand and The scope of application is expanding, showing a continuous upward trend. However, due to the relatively strong adhesive performance of water-based acrylic pressure-sensitive adhesives, it is difficul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/14C09J11/04C09J11/06C09J11/08C08F220/18C08F220/20C08F218/08C08F220/14C08F2/30C08F2/26C08F2/38
CPCC08F2/26C08F2/30C08F2/38C08F220/18C08F220/1804C08F220/1808C08K2003/265C08K2201/011C09J11/04C09J11/06C09J11/08C09J133/066C08L29/04C08K3/36C08K5/544C08K3/26C08K5/5435C08F220/20C08F218/08C08F220/14
Inventor 傅和青沈丽香王盛钟细明
Owner SOUTH CHINA UNIV OF TECH
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