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Method for preparing emulsion acrylic pressure-sensitive adhesive for high-speed coating machine

An acrylic, coating machine technology, applied in the direction of adhesive types, ester copolymer adhesives, etc., can solve the problems of poor leveling, slow water volatilization, uneven gluing, etc. The effect of good adhesive performance, fast curing speed and low cost of raw materials

Active Publication Date: 2012-06-20
CHANGZHOU BAOLI ADHESIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the biggest problems of emulsion-type acrylate pressure-sensitive adhesives are: 1. When used for high-speed coating, the volatilization rate of water is slow and it is difficult to match the high-speed coating machine; 2. The surface tension of water is greater than the surface energy of the material to be coated. , so there are problems of uneven gluing and poor leveling during high-speed coating. The essence is that it is difficult for the emulsion to infiltrate the solid surface

Method used

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Examples

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Effect test

preparation example Construction

[0017] The present invention proposes a preparation method of emulsion-type acrylate pressure-sensitive adhesive for high-speed coating machine, comprising: adding reaction monomer, emulsifier, wetting agent, cross-linking agent and deionized water into a high-position emulsification tank, Emulsify and preheat to 40~50℃, prepare the pre-emulsion for later use, the reaction monomer includes soft monomer and hard monomer, put a part of the prepared pre-emulsion and a part of the initiator into the reaction tank, and raise the temperature to 55~75 ℃, turn on the condensate water, continue to heat up to 75~85℃, when the temperature is stable, start to drop a part of the remaining pre-emulsion and initiator, and carry out a nucleation reaction for 1~4h under stirring. Add functional monomers and a small amount of deionized water to the emulsion, stir evenly and continue to drop a part of the remaining pre-emulsion for 0~3h, and at the same time continue to drop the remaining ini...

Embodiment 1

[0026] Add 160 kg of butyl acrylate, 160 kg of ethyl acrylate, 11 kg of methyl methacrylate, 0.1 kg of polyoxyethylene alkylated ether, 11 kg of N-methylol acrylamide, and 5 kg of sodium lauryl sulfate into the emulsification tank of the head tank in sequence , 1.76kg of octylphenol polyoxyethylene (10) ether and 189kg of water were stirred and emulsified for later use; in the reaction tank, 1.76kg of sodium lauryl sulfate and 1.32kg of octylphenol polyoxyethylene (10) ether were sequentially added Mix with water, 53kg, stir well and dissolve for later use; add 0.85kg of ammonium persulfate and 55kg of water into the high-level dropping tank for later use.

[0027] Heat the reaction tank to 40°C, put 55kg of the emulsion in the emulsification tank into it, continue heating to about 60°C with stirring, add 1 / 10 of the initiator, open the condensed water, and continue heating to 75~80°C to start the reaction. The automatic exothermic temperature of the system rises rapidly to ab...

Embodiment 2

[0030] Add 160 kg of isooctyl acrylate, 160 kg of ethyl acrylate, 11 kg of methyl methacrylate, 0.1 kg of polyoxyethylene alkylated ether, 11 kg of N-methylol acrylamide, and sodium lauryl sulfate into the emulsification tank of the head tank in sequence. 5kg, 1.76kg of octylphenol polyoxyethylene (10) ether and 189kg of water were stirred and emulsified for later use; in the reaction tank, 1.76kg of sodium lauryl sulfate and 1.32 kg of octylphenol polyoxyethylene (10) ether were added in sequence kg and water, 53kg was stirred and dissolved for later use; 0.85kg of ammonium persulfate and 55kg of water were added to the high-level dropping tank for later use. - ·

[0031] Heat the reaction tank to 40°C, put 55kg of the emulsion in the emulsification tank into it, continue heating to about 60°C with stirring, add 1 / 10 of the initiator, open the condensed water, and continue heating to 75~80°C to start the reaction. The automatic exothermic temperature of the system rises rapi...

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Abstract

The invention discloses preparation of an emulsion acrylic pressure-sensitive adhesive for a high-speed coating machine, which comprises the following steps of: preparation of pre-emulsion, i.e. adding a reactive monomer, an emulsifier, a wetting agent, a cross-linking agent and deionized water into a high-level emulsification tank to prepare the pre-emulsion for later use; preparation of seed emulsion and primary nucleation, i.e. performing the primary nucleation reaction for 1 to 4 hours; secondary nucleation, i.e. adding a functional monomer and a small amount of deionized water into the residual pre-emulsion and continuously dropwise adding an initiator with stirring; and chain propagation and partial cross-linking polymerization of a polymer, i.e. after totally dropwise adding the raw materials in the emulsification tank and the initiator, carrying out chain propagation and partial cross-linking polymerization for 1 to 4 hours. The emulsion acrylic pressure-sensitive adhesive has low raw material cost, high bonding strength, good adhesive application performance on the premise of the same solid content, and high curing speed.

Description

technical field [0001] The invention relates to the technical field of pressure-sensitive adhesive preparation, in particular to the preparation of an emulsion-type acrylate pressure-sensitive adhesive for a high-speed coating machine. Background technique [0002] Pressure-sensitive adhesive refers to a type of adhesive that can wet the surface to be adhered and stick the adherend firmly only by applying a certain pressure, resulting in practical bonding strength. Acrylic pressure-sensitive adhesives are currently the most widely used pressure-sensitive adhesives, and there are two types: water emulsion type and solvent type. Solvent-based acrylic pressure-sensitive adhesives have the advantages of high initial adhesion, good water resistance, fast coating speed, and high production efficiency, but there are fatal shortcomings such as large consumption of organic solvents, serious environmental pollution, and unsafety. The water-emulsion type uses water as a solvent, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/58C08F2/30C08F2/26C09J133/08
Inventor 胡文虎
Owner CHANGZHOU BAOLI ADHESIVE
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