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Removable pressure-sensitive adhesive composition

A technology of pressure-sensitive adhesives and compositions, applied in the direction of adhesive types, ester copolymer adhesives, coatings, etc., can solve the phenomenon of removable pressure-sensitive adhesive residue, poor aging resistance, It can remove problems such as poor construction of pressure-sensitive adhesives, and achieve the effects of convenient production and operation, high peel strength, and no adhesive residue

Active Publication Date: 2021-01-15
浙江龙游道明光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the poor aging resistance of the removable pressure-sensitive adhesive in the prior art, the poor workability of the removable pressure-sensitive adhesive with high initial tack, and the removable pressure-sensitive adhesive with high peel strength. The mixture is prone to defects such as residual glue phenomenon, and a new removable pressure-sensitive adhesive composition is provided

Method used

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  • Removable pressure-sensitive adhesive composition

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A removable pressure-sensitive adhesive composition, comprising the following components by weight:

[0052]

[0053]

[0054] Its preparation steps are as follows:

[0055] Q1: Put the lauryl acrylate, methyl acrylate, acrylic acid, diacetone acrylamide, hydroxyethyl methacrylate, ethyl acetate, and azobisisobutylcyanide in the above parts by weight into the container, and turn it at 200 rpm Stir at a speed of 1 / min for 15 minutes to prepare mixed solution A;

[0056] Q2: Take 30% of the total weight of the above-mentioned mixed solution A and put it into the reaction kettle, fully stir it for 10 minutes at room temperature, the stirring speed is 80 rpm, and continuously feed nitrogen into the reaction kettle while stirring. After the stirring is completed, Gradually raise the temperature in the reactor to 75°C and continue the reaction for 30 minutes;

[0057] Q3: Take the remaining mixed liquid A in the dropping funnel, drop it into the above reaction kettle ...

Embodiment 2

[0067] A removable pressure-sensitive adhesive composition, comprising the following components by weight:

[0068]

[0069] Its preparation steps are as follows:

[0070] Q1: Put the lauryl acrylate, methyl acrylate, acrylic acid, diacetone acrylamide, hydroxyethyl methacrylate, ethyl acetate, and azobisisobutylcyanide in the above parts by weight into the container, and turn it at 300 rpm Stir at a speed of 1 / min for 30 minutes to prepare mixed solution A;

[0071] Q2: Take 45% of the total weight of the above-mentioned mixed liquid A and put it into the reactor, fully stir it for 30 minutes at room temperature, the stirring speed is 200 rpm, and continuously feed nitrogen into the reactor while stirring. After the stirring is completed, Gradually raise the temperature in the reactor to 80°C and continue the reaction for 120 minutes;

[0072] Q3: Take the remaining mixed liquid A in the dropping funnel, drop it into the above reaction kettle at a constant speed and comp...

Embodiment 3

[0082] A removable pressure-sensitive adhesive composition, comprising the following components by weight:

[0083]

[0084] Its preparation steps are as follows:

[0085] Q1: Put the lauryl acrylate, methyl acrylate, acrylic acid, diacetone acrylamide, hydroxyethyl methacrylate, ethyl acetate, and azobisisobutylcyanide in the above weight parts into the container, and turn it at 250 rpm Stir at a speed of 1 / min for 22 minutes to prepare mixed solution A;

[0086] Q2: Take 38% of the total weight of the above-mentioned mixed solution A and put it into the reaction kettle, fully stir it at room temperature for 20 minutes, the stirring speed is 140 rpm, and continuously feed nitrogen into the reaction kettle while stirring. After the stirring is completed, Gradually raise the temperature in the reactor to 78°C and continue the reaction for 75 minutes;

[0087] Q3: Take the remaining mixed liquid A in the dropping funnel, drop it into the above reaction kettle at a constant ...

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Abstract

The invention discloses a removable pressure-sensitive adhesive composition which comprises 40-50 parts of dodecyl acrylate, 35-50 parts of methyl acrylate, 0.1-1 part of acrylic acid, 0.5-2 parts ofdiacetone acrylamide, 1-3 parts of hydroxyethyl methacrylate, 40-60 parts of ethyl acetate, 0.2-0.8 part of azodiisobutyronitrile, 5-10 parts of tert-butyl alcohol, 2-5 parts of acetylacetone and 0.2-0.5 part of aluminum acetylacetonate. The preparation method comprises the following steps of Q1, adding dodecyl acrylate, methyl acrylate, acrylic acid, diacetone acrylamide, hydroxyethyl methacrylate, ethyl acetate and azodiisobutyronitrile into a container, and stirring to obtain a mixed solution A, Q2, putting the mixed solution A into a reaction kettle, and continuously introducing nitrogen for reaction, Q3, dropwise adding the mixed solution A into the reaction kettle, Q4, reducing the temperature to 40-45 DEG C, and Q5, adding tert-butyl alcohol, acetylacetone and aluminum acetylacetonate into the reaction kettle, stirring, and discharging. The adhesive composition provided by the invention has excellent aging resistance and weatherability, good application property and removability, and is not easy to remain adhesive.

Description

technical field [0001] The present invention relates to pressure-sensitive adhesives, and more particularly to a removable pressure-sensitive adhesive composition. Background technique [0002] Removable pressure-sensitive adhesives are commonly used on car body protection films to ensure that the car body protection film can be peeled off without damaging the car paint when replacing the car body protection film. However, in the actual application process, the existing removable pressure-sensitive adhesives have the following three defects: [0003] 1. Some of the removable pressure-sensitive adhesives have decreased adhesion after outdoor aging, which leads to defects such as bubbling and edge warping at the curved surface of the protective film of the car shell, especially at the waistline of the car; [0004] 2. During the construction of large-area film on the car shell, if the removable pressure-sensitive adhesive has a high initial adhesion, when the first constructi...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J133/12C08F220/18C08F220/14C08F220/06C08F220/20C08F220/58
CPCC09D133/24C08F220/1812C08F220/14C08F220/06C08F220/20C08F220/58
Inventor 郑小平苏国芳胡锋舒林飞
Owner 浙江龙游道明光学有限公司
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