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Water-based pressure sensitive adhesive as well as preparation method and application thereof

A pressure-sensitive adhesive, water-based technology, applied in the direction of adhesives, monocarboxylate copolymer adhesives, adhesive types, etc., can solve the problems of poor colloidal strength, poor bonding performance and weather resistance

Active Publication Date: 2016-02-03
上海九元石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The water-based pressure-sensitive adhesives in the above-mentioned prior art have poor bonding performance and weather resistance to difficult-to-stick surfaces (such as PP materials), and the strength of the colloid itself is relatively poor.

Method used

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  • Water-based pressure sensitive adhesive as well as preparation method and application thereof
  • Water-based pressure sensitive adhesive as well as preparation method and application thereof
  • Water-based pressure sensitive adhesive as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] (1) Preparation of acrylate emulsion:

[0071] In a four-necked flask equipped with an electric stirrer, a reflux condenser, a thermometer and a constant pressure dropping funnel, add 60 parts by weight of deionized water, raise the temperature to 83°C, and then add 20 parts of vinyl acetate dropwise in sequence Monomer, 10 parts of methyl methacrylate monomer, 5 parts of polyvinyl alcohol monomer, 0.08 part of emulsifier sodium laurate and a mixture of alkylphenol polyoxyethylene ether (wherein, dodecyl The mass ratio of sodium base acid and alkylphenol polyoxyethylene ether is 3:2), 0.04 parts of initiator ammonium persulfate, 0.04 parts of crosslinking agent trimethylolpropane and triethanolamine, and the above raw materials are all in Dropping is completed within 2.5-3 hours, then raise the temperature to 90°C, react for 0.7 hours, drop the temperature at the same time at a rate of 10-20 drops / min, slowly add 10 parts of sodium bicarbonate aqueous solution to adjust...

Embodiment 2

[0078] (1) Preparation of acrylate emulsion:

[0079] In a four-neck flask equipped with an electric stirrer, a reflux condenser, a thermometer and a constant pressure dropping funnel, add 70 parts by weight of deionized water, raise the temperature to 85°C, and then add 25 parts of vinyl acetate dropwise in sequence Monomer, 15 parts of methyl methacrylate monomer, 8 parts of polyvinyl alcohol monomer, 0.12 part of emulsifier alkylphenol ethoxylate, 0.06 part of initiator potassium persulfate, 0.08 part of crosslinking Add maleic anhydride, the above raw materials are all dropped within 2.5~3h, then raise the temperature to 95°C, react for 0.5h, cool down and slowly add 15 parts of ammonium bicarbonate aqueous solution at a rate of 10~20 drops / min to adjust the pH To 6.5, filter to obtain acrylate emulsion;

[0080] (2) Preparation of castor oil-based polyurethane prepolymer:

[0081] Pretreatment of castor oil: vacuum dehydration of castor oil castor oil at 120°C for 3h; ...

Embodiment 3

[0086] (1) Preparation of acrylate emulsion:

[0087] In a four-neck flask equipped with an electric stirrer, a reflux condenser, a thermometer and a constant pressure dropping funnel, add 55 parts by weight of deionized water, raise the temperature to 80°C, and then add 18 parts of vinyl acetate dropwise in sequence Monomer, 5 parts of methyl methacrylate monomer, 2 parts of polyvinyl alcohol monomer, 0.05 part of emulsifier sodium laurylate, 0.03 part of initiator ammonium persulfate and potassium persulfate mixture, the above The raw materials are all dropped within 2.5-3 hours, then heated up to 85°C, reacted for 1 hour, and at the same time lowered the temperature at a rate of 10-20 drops / min, slowly added 8 parts of sodium bicarbonate aqueous solution to adjust the pH to 5, and filtered to obtain acrylate Lotion;

[0088] (2) Preparation of castor oil-based polyurethane prepolymer:

[0089] Pretreatment of castor oil: vacuum dehydration of castor oil castor oil at 130°...

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Abstract

The invention provides a water-based pressure sensitive adhesive as well as a preparation method and application thereof. The water-based pressure sensitive adhesive is mainly composed of the following raw materials in parts by weight: 40-60 parts of acrylate emulsion, 30-60 parts of castor oil-based polyurethane prepolymer and 0-10 parts of a blocked polyurethane curing agent. The preparation method comprises the following steps: sequentially adding the acrylate emulsion, the castor oil-based polyurethane prepolymer and the blocked polyurethane curing agent into a reactor according to a formula ratio, heating to 25-40 DEG C, reacting for 0.5-1 h and filtering so as to obtain the water-based pressure sensitive adhesive. The water-based pressure sensitive adhesive is good in adaptability to a substrate surface and good in weather resistance and can be used under room temperature conditions.

Description

technical field [0001] The invention belongs to the field of water-based pressure-sensitive adhesives, and relates to a water-based pressure-sensitive adhesive and its preparation method and application, in particular to a high-performance and environment-friendly water-based pressure-sensitive adhesive and its preparation method and application. Background technique [0002] Pressure-sensitive adhesive refers to a type of adhesive that can be bonded to an adherend under external pressure. At present, it is widely used in industries such as sealing tape, labels, protective tape and decorative panels. The peel strength of the pressure-sensitive adhesive mainly depends on the adhesion of the polymer and the adhesion of the colloid to the bonding surface. There is also the right balance. [0003] Traditional pressure-sensitive adhesive products have poor cohesion, poor adaptability to substrates of different polarities, and poor temperature resistance, resulting in defects in...

Claims

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Application Information

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IPC IPC(8): C09J131/04C09J175/14C08F218/08C08F220/18C08F2/30C08G18/67C08G18/66C08G18/48C08G18/32C08G18/34C08G18/36C08G18/12
Inventor 陈县萍
Owner 上海九元石油化工有限公司
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