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Thermal expansion microbead, pressure-sensitive adhesive capable of being thermally peeled repeatedly and containing thermal expansion microbead, reflective film and preparation method of thermal expansion microbead

A technology of heat-expandable microbeads and pressure-sensitive adhesives, which is applied in the field of reflective film and its preparation, can be repeatedly heat-peeled pressure-sensitive adhesives, and heat-expandable microbeads. Moderate foaming temperature and high foaming ratio

Pending Publication Date: 2022-07-01
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a heat-expandable microbead, a repeatedly heat-peelable pressure-sensitive adhesive containing it, a reflective film and a preparation method, so as to solve the problem that the existing reflective film is difficult to peel off during the heat-peeling process

Method used

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  • Thermal expansion microbead, pressure-sensitive adhesive capable of being thermally peeled repeatedly and containing thermal expansion microbead, reflective film and preparation method of thermal expansion microbead
  • Thermal expansion microbead, pressure-sensitive adhesive capable of being thermally peeled repeatedly and containing thermal expansion microbead, reflective film and preparation method of thermal expansion microbead

Examples

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preparation example Construction

[0026] As mentioned in the background art, it is difficult for the existing luminescent film to achieve thermal peeling or peeling problems such as residual glue during thermal peeling. In order to improve this situation, in a typical embodiment of the present application, a thermal expansion micro A preparation method of beads, the preparation method comprises: dropping solution A into solution B to obtain mixed suspension solution C; wherein solution A is a mixed solution of NaCl and NaOH, and solution B is MgCl 2 , NaNO 3 and the mixed solution of SDS; the monomer, the toughening agent, the initiator, the foaming agent and the crosslinking agent are mixed to obtain a suspension polymerization system D; the mixed suspension solution C and the suspension polymerization system D are mixed and reacted to obtain thermally expandable microbeads .

[0027] By adopting the method of the present application, adopting the suspension polymerization method, and by controlling the type...

Embodiment 1

[0060] 1. Preparation of heat-expandable microbeads

[0061] 1) 35g of NaCl and 28g of NaOH solids were added to 100mL of deionized water, and after strong magnetic stirring, the solid particles were completely dissolved to obtain solution A. 40g MgCl 2 , 5gNaNO 3 and 6 g of sodium dodecyl sulfate (SDS) were sequentially dissolved in 100 mL of deionized water, and after stirring uniformly, solution B was obtained. Under stirring, the above solution A was slowly added dropwise to the solution B to obtain a mixed suspension solution C.

[0062] 2) Combine 48g alkene nitrile (AN), 12g methyl methacrylate (MMA) and 6g methacrylic acid (MAA) monomer with 1.2g styrene-butadiene copolymer toughening agent, and 1.5g benzene peroxide The formyl (BPO) initiator is mixed uniformly, then 20 g of isooctane foaming agent and 2 g of ethylene glycol dimethacrylate (EGDMA) crosslinking agent are added to the mixed solution, and the suspension polymerization system D is obtained after stirri...

Embodiment 2

[0068] 1. Preparation of heat-expandable microbeads

[0069] Similar to Example 1, the difference is:

[0070] The addition amount of styrene-butadiene copolymer toughening agent is 1.35g;

[0071] The addition amount of benzoyl peroxide (BPO) initiator is 2.0g;

[0072] The foaming agent is isooctane, and the addition amount is 25g;

[0073] The amount of ethylene glycol dimethacrylate (EGDMA) crosslinking agent added was 2.5 g.

[0074] 2. The preparation of heat-peelable pressure-sensitive adhesive and reflective film and the preparation of reflective film

[0075] The specific implementation method for the preparation of the repeatable heat-peelable pressure-sensitive adhesive and the reflective film is similar to that of Example 1, except that:

[0076] The amount of ethyl acetate diluent is 250 parts;

[0077] The dosage of epoxy resin type crosslinking agent is 4 parts;

[0078] The dosage of vinyl silicone resin modifier is 3 parts;

[0079] The dosage of terpen...

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Abstract

The invention provides a thermal expansion microbead, a repeatedly thermally peelable pressure-sensitive adhesive containing the thermal expansion microbead, a reflective film and a preparation method. The preparation method of the thermal expansion microspheres comprises the following steps: dripping a solution A into a solution B to obtain a mixed suspension solution C; wherein the solution A is a mixed solution of NaCl and NaOH, and the solution B is a mixed solution of MgCl2, NaNO3 and SDS; mixing a monomer, a flexibilizer, an initiator, a foaming agent and a cross-linking agent to obtain a suspension polymerization system D; the mixed suspension solution C and the suspension polymerization system D are subjected to a mixed reaction, and the thermal expansion microspheres are obtained. The thermal expansion microbead prepared by the method has the remarkable advantages of moderate foaming temperature, high foaming ratio and good repeated foaming stability. And the peelable pressure-sensitive adhesive which is easy to peel repeatedly can be obtained when the peelable pressure-sensitive adhesive is used in the pressure-sensitive adhesive, and the problems that the peelable pressure-sensitive adhesive is poor in peeling effect and cannot be peeled repeatedly in the thermal peeling process are solved.

Description

technical field [0001] The present invention relates to the field of light-emitting films, in particular, to a thermally expandable microbead, a repeatable thermally peelable pressure-sensitive adhesive comprising the same, a reflective film and a preparation method. Background technique [0002] Luminescent film is a special film material made of the principle of retroreflection. It can be widely used in the field of safety protection, including road traffic signs, reflective signs of vehicles, special work clothing, fire signs, railway signs, mine signs, etc. In the field, its safety prompt effect has played a major role in protecting the safety of human life and property. For example, the reflective film is applied to road traffic signs, which can reflect the light emitted by the lights on the surface to the driver's eyes at night, so that the warning information on the signs can be visually recognized. [0003] Pressure-sensitive adhesive (PSA) is a pressure-sensitive a...

Claims

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Application Information

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IPC IPC(8): C08J9/20C08J9/14C08J9/32C08F220/44C08F220/14C08F220/06C08F222/14C08F2/18C08F2/44C09J133/04C09J145/00C09J11/04C09J7/38G02B5/128C08L33/04C08L45/00
CPCC08J9/20C08J9/141C08J9/32C08F220/44C08F2/18C08F2/44C09J133/04C09J11/04C09J7/38G02B5/128C08J2203/14C08J2203/22C08J2333/04C08J2445/00C08J2433/20C09J2433/00C08F220/14C08F220/06C08F222/102C08L45/00C08K3/042C08K3/041
Inventor 刘若鹏赵治亚肖成伟
Owner LUOYANG INST OF CUTTING EDGE TECH
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