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Aqueous thermally-foamed gluing adhesive plate

A thermal foaming, water-based technology that can be used in adhesive types, ester copolymer adhesives, film/sheet adhesives, etc., to solve problems such as migration and affecting the adhesion of acrylic emulsions

Inactive Publication Date: 2011-04-20
NANYA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Acrylic emulsion plays a pivotal role in water-based resins, but for the stability of emulsion particles, acrylic emulsion often adds some emulsifiers to maintain the stability of the emulsion. Due to the low molecular weight of the added emulsifier, there will be migration Phenomenon, which affects the adhesion of acrylic emulsion after film formation

Method used

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  • Aqueous thermally-foamed gluing adhesive plate
  • Aqueous thermally-foamed gluing adhesive plate
  • Aqueous thermally-foamed gluing adhesive plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] Such as figure 1 As shown, a 100-micron BH216 polyester film 20 (a PET film produced by Nan Ya Plastic Industry Co., Ltd.) is selected as the base material layer 20 of the water-based thermally foamed adhesive rubber sheet 10 .

[0151] When making the primer layer 30, take the prefabricated "primer acrylic emulsion" sample (P1) as the material, and take the solid content of the sample (P1) as 100 parts by weight, add 2 parts by weight of water-based isocyanate crosslinking agent 3100 (manufactured by Bayer) and 0.1 parts by weight of coupling agent KBM-503, and then adjusted together into "prime acrylic emulsion".

[0152] The prepared "primer acrylic emulsion" is directly coated on the surface-treated substrate layer 20 . After drying, a semi-finished product containing BH216 polyester film with a total thickness of 110-150 microns is obtained, wherein the thickness of the primer layer 20 is 10-50 microns.

[0153] When continuing to make the thermal foam adhesive l...

Embodiment 2

[0156] As in Example 1, but the "primer acrylic emulsion" component used to make the primer layer 30 is replaced by adding 4 parts by weight of water-based isocyanate-based crosslinking agent 3100; used to make the thermally foamed adhesive layer 40 The "heat-foaming pressure-sensitive adhesive" component is replaced by adding 3 parts by weight of foaming agent ES-81D.

[0157] After evaluating the adhesion of the finished product, the peelability after heating and the viscoelasticity of the rheometer, the results are shown in Table 3.

Embodiment 3

[0159] As in Example 2, but the "primer acrylic emulsion" component used to make the primer layer 30 is replaced with a prefabricated "primer acrylic emulsion" sample (P2); used to make thermal foaming The "thermal foaming pressure-sensitive adhesive" composition of the adhesive layer 40, with the acrylic emulsion sample (WB-2) of the prefabricated "thermal foaming pressure-sensitive adhesive" and adding 4 parts by weight of blowing agent ES- 81D replaced.

[0160] After evaluating the adhesion of the finished product, the peelability after heating and the viscoelasticity of the rheometer, the results are shown in Table 3.

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Abstract

The invention discloses an environmental-friendly aqueous thermally-foamed gluing adhesive plate, which contains no solvent type resin and structurally at least comprises a base material layer used as a bottom layer, a bottom adhesive layer coated on the base material layer and a thermally-foamed adhesive layer coated on the bottom adhesive layer, wherein the thermally-foamed adhesive layer is a pressure sensitive adhesive formed by blending aqueous acryl emulsion modified by a reactive emulsifier with a foaming agent dilatable after being heated and has a favorable bonding characteristic; and in a processing process of an electronic or plastic assembly, the aqueous thermally-foamed gluing adhesive plate is suitable for the temporary gluing of the electronic or plastic assembly to be processed for processing, and when the assembly is required to be recovered after the processing is finished, the processed assembly can be separated from the aqueous thermally-foamed gluing adhesive plate only by heating for a certain time under fixed temperature, therefore, the aqueous thermally-foamed gluing adhesive plate has the environmental-protection effect of reducing the discharge of VOC (Volatile Organic Compounds).

Description

technical field [0001] The invention relates to a solvent-free resin-free water-based thermal foaming adhesive rubber sheet, in particular to an environment-friendly water-based thermal foaming adhesive rubber sheet using a water-based acrylic emulsion modified by a reactive emulsifier. Background technique [0002] The structure of a commercially available heat-peelable pressure-sensitive adhesive sheet includes a substrate, an organic elastic layer coated on the substrate with a rubber-like resin, and an organic elastic layer coated with a foaming agent or an expanding agent on the organic elastic layer. A resin adhesive layer on the layer, and a peelable release film protective layer attached to the surface of the resin adhesive layer. [0003] However, commercially available heat-peelable pressure-sensitive adhesive sheets used to use solvent-based resins. During the processing, a large amount of solvents will be released into the atmosphere, causing serious pollution an...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B7/12C09J7/02C09J133/08
Inventor 冯殿润徐森煌吴鸿勋庄惠钧
Owner NANYA PLASTICS CORP
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