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Aqueous polyurethane adhesive emulsion composition and preparation method thereof

An emulsion composition, water-based polyurethane technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of poor hydrolysis resistance, low initial peel strength, etc. Low VOC and improved hydrolysis resistance

Active Publication Date: 2021-02-19
SHANGHAI ZIJIANG NEW MATERIAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water-based polyurethane adhesives also have disadvantages such as poor hydrolysis resistance and low initial peel strength.
Although the water-based polyether polyurethane adhesive can improve its hydrolysis resistance, the initial peel strength is too low

Method used

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  • Aqueous polyurethane adhesive emulsion composition and preparation method thereof
  • Aqueous polyurethane adhesive emulsion composition and preparation method thereof
  • Aqueous polyurethane adhesive emulsion composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This embodiment provides a kind of aqueous polyurethane adhesive emulsion composition, adopts the raw material of following component and content to prepare:

[0051] (1) Polycaprolactone diol (molecular weight 3000) 260g 47.6％ (2) 4,4'-Dicyclohexylmethane diisocyanate 210g 38.5％ (3) Dimethylolpropionic acid 24g 4.4％ (4) Butanediol 18g 3.3％ (5) N,N'-Dimethylethanolamine 14g 2.6％ (6) Ethylenediamine 5g 0.9％ (7) epoxy resin 15g 2.7％ (8) acetone 300g - (9) Deionized water 1200g -

[0052] The above-mentioned water-based polyurethane adhesive emulsion composition is prepared according to the following processing steps:

[0053] 1) Component (1) is stirred and dehydrated at 70-90° C. under vacuum conditions, and the stirring speed is 100-200 rpm. After the water content in the component (1) is less than 200ppm, stop vacuuming and return to normal pressure.

[0054] 2) Keep stirring and add comp...

Embodiment 2

[0063] This embodiment provides a kind of aqueous polyurethane adhesive emulsion composition, adopts the raw material of following component and content to prepare:

[0064] (1) Polycaprolactone diol (molecular weight 3000) 219g 40％ (2) 4,4'-Dicyclohexylmethane diisocyanate 246.4g 45％ (3) Dimethylolpropionic acid 38.3g 7％ (4) Butanediol 16.4g 3％ (5) N,N'-Dimethylethanolamine 16.4g 3％ (6) Ethylenediamine 5.5g 1％ (7) epoxy resin 5.5g 1％ (8) acetone 300g - (9) Deionized water 1200g -

[0065] The above-mentioned water-based polyurethane adhesive emulsion composition is prepared according to the following processing steps:

[0066] 1) Component (1) was stirred and dehydrated at 85° C. under vacuum condition, and the stirring speed was 200 rpm. After the water content in the component (1) is less than 200ppm, stop vacuuming and return to normal pressure.

[0067]2) Keep stirring and add component (2),...

Embodiment 3

[0076] This embodiment provides a kind of aqueous polyurethane adhesive emulsion composition, adopts the raw material of following component and content to prepare:

[0077] (1) Polycaprolactone diol (molecular weight 3000) 259g 50％ (2) 4,4'-Dicyclohexylmethane diisocyanate 181.3g 35％ (3) Dimethylolpropionic acid 36.3g 7％ (4) Butanediol 15.5g 3％ (5) N,N'-Dimethylethanolamine 6g 1.1％ (6) Ethylenediamine 5g 1％ (7) epoxy resin 15g 2.9％ (8) acetone 300g - (9) Deionized water 1200g -

[0078] The above-mentioned water-based polyurethane adhesive emulsion composition is prepared according to the following processing steps:

[0079] 1) Component (1) was stirred and dehydrated at 85° C. under vacuum condition, and the stirring speed was 200 rpm. After the water content in the component (1) is less than 200ppm, stop vacuuming and return to normal pressure.

[0080] 2) Keep stirring and add component (2), ...

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Abstract

The invention discloses a water-resistant water-based polyurethane adhesive emulsion and a preparation method thereof; the emulsion includes water and a resin component, and the resin component includes the following in terms of weight percent of the total weight of the resin component Raw material components: isocyanate prepolymer 35-45%, polyester polyol 40-50%, hydrophilic chain extender 3-7%, short-chain chain extender 2-5%, post-chain extender 0.5-1 %, neutralizer 1-3%, epoxy resin 1-3%. The water-based polyurethane adhesive emulsion has high heat-sealing strength and low stickiness, and solves the deficiency of the water-based adhesive in terms of hydrolysis resistance and stability. Compared with solvent-based adhesives used in large quantities, water-based adhesives have no solvent emissions during the compounding process and no solvent residue after compounding, which has obvious environmental advantages.

Description

technical field [0001] The invention relates to a water-based polyurethane adhesive emulsion composition and a preparation method thereof, belonging to the field of flexible packaging adhesives. Background technique [0002] With the development of science and technology, the improvement of economic level and the improvement of people's quality of life, the development of environmentally friendly adhesives has become an inevitable trend, and water-based polyurethane adhesives are one of them. Environmentally friendly adhesives prepared from solvents or dispersants. However, water-based polyurethane adhesives also have disadvantages such as poor hydrolysis resistance and low initial peel strength. Although the water-based polyether polyurethane adhesive can improve its hydrolysis resistance, the initial peel strength is too low. Contents of the invention [0003] Aiming at the defects of the prior art, the object of the present invention is to provide a water-based polyur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C09J163/00C08G18/76C08G18/66C08G18/42C08G18/34C08G18/32C08G18/10
CPCC08G18/10C08G18/4277C08G18/7671C09J175/06C08L63/00C08G18/348C08G18/3206C08G18/3228
Inventor 董海普林雪李斐谢允斌
Owner SHANGHAI ZIJIANG NEW MATERIAL TECH CO LTD
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