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High-temperature-resistant acrylic pressure-sensitive adhesive and preparation method thereof

An acrylic pressure-sensitive adhesive, high temperature resistant technology, used in adhesives, non-polymer adhesive additives, adhesive types, etc. and other problems, to achieve the effect of improving peel strength, improving cohesion and simple preparation method

Active Publication Date: 2021-09-17
NINGBO SOKEN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, general-purpose solvent-based acrylic pressure-sensitive adhesives have poor heat resistance. After high-temperature treatment or use at high temperatures, there will be problems in peel strength and holding force, as well as separation and migration of the adhesive layer.

Method used

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  • High-temperature-resistant acrylic pressure-sensitive adhesive and preparation method thereof
  • High-temperature-resistant acrylic pressure-sensitive adhesive and preparation method thereof
  • High-temperature-resistant acrylic pressure-sensitive adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of phosphogypsum whiskers: Prepared by hydrothermal method, 2 parts of phosphogypsum (produced by Jiangsu Yifu Technology Co., Ltd., the same below) and 16 parts of tap water were added to the reactor, the reaction temperature was 155 ° C, and the pressure was controlled. At 0.3MPa, add 0.6 parts of sodium dodecylsulfonate and 0.3 parts of citric acid, the reaction stirring speed is 200r / min, the reaction time is 3h, add 0.72 parts of stearic acid, keep warm for 1h, after the reaction is completed, use 0.6 parts of saturated Neutralize in lime water, then discharge, put the suspension of phosphogypsum whiskers in a spin dryer for dehydration, and put the dehydrated whiskers in a drying oven at 200°C for 3 hours to obtain phosphogypsum whiskers. Add 10 parts of ethyl acetate, 0.1 part of polyurethane LH3721A adhesive (Jiangsu Lihe Adhesive Co., Ltd., the same below) and 0.02 part of LH3721B curing agent (Jiangsu Lihe Adhesive Co., Ltd., the same below), an...

Embodiment 2

[0033] (1) Preparation of phosphogypsum whiskers: Prepared by hydrothermal method, add 2 parts of phosphogypsum and 16 parts of tap water into the reaction kettle, the reaction temperature is 155 ° C, the pressure is controlled at 0.3 MPa, and 0.6 parts of dodecyl sulfonate are added Na2SO4 and 0.3 parts of citric acid, the reaction stirring speed is 200r / min, the reaction time is 3h, add 0.72 parts of stearic acid, keep warm for 1h, neutralize with 0.6 parts of saturated lime water after the reaction, and then discharge the material, the phosphogypsum crystal The whisker suspension is dehydrated in a spin dryer, and the dehydrated whiskers are dried in a drying oven at 200°C for 3 hours to obtain phosphogypsum whiskers. Add 10 parts of ethyl acetate, 0.1 part of polyurethane LH3721A adhesive and 0.02 part of LH3721B curing agent, after stirring for 10 minutes, mix it with 0.5 part of phosphogypsum whiskers, after stirring for 0.5 hours, dry at 100°C for 30 minutes, and After ...

Embodiment 3

[0037] (1) Preparation of phosphogypsum whiskers: Prepared by hydrothermal method, add 2 parts of phosphogypsum and 16 parts of tap water into the reaction kettle, the reaction temperature is 155 ° C, the pressure is controlled at 0.3 MPa, and 0.6 parts of dodecyl sulfonate are added Na2SO4 and 0.3 parts of citric acid, the reaction stirring speed is 200r / min, the reaction time is 3h, add 0.72 parts of stearic acid, keep warm for 1h, neutralize with 0.6 parts of saturated lime water after the reaction, and then discharge the material, the phosphogypsum crystal The whisker suspension is dehydrated in a spin dryer, and the dehydrated whiskers are dried in a drying oven at 200°C for 3 hours to obtain phosphogypsum whiskers. Add 10 parts of ethyl acetate, 0.2 parts of polyurethane LH3721A adhesive and 0.02 parts of LH3721B curing agent, stir for 10 minutes, mix it with 1.0 parts of phosphogypsum whiskers, stir for 0.5 hours, dry at 100°C for 30 minutes, and After curing for 7 days...

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Abstract

The invention relates to a high-temperature-resistant acrylic pressure-sensitive adhesive and a preparation method thereof. The acrylic pressure-sensitive adhesive comprises the following raw materials in parts by mass: 0.1-2.5 parts of ardealite whiskers, 30 parts of a first solvent, 0-5 parts of a whisker modifier, 100 parts of a solvent type acrylic pressure-sensitive adhesive and 0.5-20 parts of a hardening agent. Compared with the prior art, the preparation method of the high-temperature-resistant acrylic pressure-sensitive adhesive is simple; the high-temperature-resistant acrylic pressure-sensitive adhesive takes the ardealite whisker as one of main functional raw materials, and the ardealite whisker integrates the properties of fibers and fillers. The ardealite whiskers are applied to the adhesive, so that the peel strength of the adhesive can be effectively improved, and the toughness is improved. Moreover, the adhesive layer can be prevented from being damaged under the action of high temperature, and the adhesive still has relatively good viscosity and persistent viscosity at the high temperature.

Description

technical field [0001] The invention relates to the field of acrylic pressure-sensitive adhesives, in particular to a high-temperature-resistant acrylic pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] At present, my country has accumulatively stored about 200 million tons of phosphogypsum. With the development of high-efficiency compound fertilizers, about 80 million tons of phosphogypsum will be added every year, with a utilization rate of about 20%. In order to protect the ecological environment and save resources, the high value of phosphogypsum Effective utilization has become a technical problem to be solved urgently. Whiskers refer to fibrous single crystals with a fixed cross-sectional shape, complete shape, perfect internal structure, and an aspect ratio of 5 to 1000. Gypsum whiskers refer to fibrous single crystals of hemihydrate or anhydrous calcium sulfate. A new functional material with excellent performance and low pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J11/04
CPCC09J133/068C09J133/064C09J11/04C08K2201/003C08K2201/004C08K9/08C08K7/08
Inventor 蒋磊虞竺君
Owner NINGBO SOKEN CHEM