Preparation method and application of acrylate pressure-sensitive adhesive

A pressure-sensitive adhesive and acrylate technology, applied in adhesives, ester copolymer adhesives, adhesive types, etc., can solve the problems of residual adhesive residue, poor light transmittance, etc., and achieve good adhesion and excellent rework performance , the effect of high bonding performance

Pending Publication Date: 2021-03-26
CROWN TAICANG ADHESIVE PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such traditional adhesives need to add tackifying resin to obtain higher viscosity, and there are disadvantages such as residual glue residue and poor light transmittance.

Method used

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  • Preparation method and application of acrylate pressure-sensitive adhesive
  • Preparation method and application of acrylate pressure-sensitive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of acrylate copolymer:

[0033] Weigh 30 parts of butyl acrylate, 10 parts of isobornyl acrylate, 50 parts of methyl acrylate, 3 parts of itaconic acid, 7 parts of hydroxyethyl acrylamide, heat up to 65°C under nitrogen atmosphere and stir evenly for 30 minutes, then Add 0.05 parts of azobisisobutyronitrile to react smoothly for 90 minutes. Raise the temperature to 80° C., add 0.05 parts of azobisisobutyronitrile and react for 240 minutes to prepare an acrylate copolymer. The resulting acrylate copolymer has a viscosity of 5000 cps (25°C), a solid content of 30%, a molecular weight of about 500,000, and a glass transition temperature Tg of -20°C.

[0034] (2) Preparation of acrylate pressure-sensitive adhesive:

[0035] Add 0.4 parts of curing agent TDI toluene diisocyanate and 20 parts of solvent ethyl acetate to the above-mentioned acrylate copolymer; mix and stir all the components evenly, let stand for defoaming, and obtain the acrylate pressure-se...

Embodiment 2

[0037] (1) Preparation of acrylate copolymer:

[0038] Weigh 60 parts of 2-ethylhexyl acrylate, 30 parts of isobornyl acrylate, 2 parts of acrylic acid, 3 parts of itaconic acid, and 5 parts of hydroxyethylacrylamide. Put the above raw materials into a 1000ml reaction kettle, raise the temperature to 65° C. and stir evenly for 30 minutes under nitrogen atmosphere, and then add 0.3 parts of azobisisoheptanonitrile to react stably for 90 minutes. Heat up to 80° C., add 0.3 parts of azobisisoheptanonitrile and react for 240 minutes to prepare an acrylate copolymer. The obtained acrylate copolymer has a viscosity of 2500 cps (25°C), a solid content of 29%, a molecular weight of about 300,000, and a glass transition temperature Tg of -19.5°C.

[0039] (2) Preparation of acrylate pressure-sensitive adhesive:

[0040] Add 0.6 parts of curing agent 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane to the above-mentioned acrylate copolymer, and 40 parts of ethyl acetate as a solvent; mix...

Embodiment 3

[0042] (1) Preparation of acrylate copolymer:

[0043] Weigh 40 parts of butyl acrylate, 30 parts of isobornyl acrylate, 15 parts of itaconic acid, and 3 parts of hydroxyethylacrylamide. Put the above raw materials into a 1000ml reaction kettle, raise the temperature to 65°C under nitrogen atmosphere and stir evenly for 30 minutes, then add 0.1 part of azobisisovaleronitrile to react stably for 90 minutes. Raise the temperature to 80° C., add 0.2 parts of azobisisovaleronitrile and react for 240 minutes to prepare an acrylate copolymer. The obtained acrylate copolymer has a viscosity of 4000 cps (25°C), a solid content of 30%, a molecular weight of about 1 million, and a glass transition temperature Tg of -18°C.

[0044] (2) Preparation of acrylate pressure-sensitive adhesive:

[0045] Add 0.5 parts of aluminum acetylacetonate curing agent and 30 parts of ethyl acetate as solvent to the above-mentioned acrylate copolymer; mix and stir all the components evenly, and let stand...

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Abstract

The invention discloses a preparation method and application of an acrylate pressure-sensitive adhesive. The acrylate pressure-sensitive adhesive is mainly prepared from the following components by weight: 30-60 parts of an acrylic acid soft monomer, 30-60 parts of an acrylic acid hard monomer and 5-20 parts of an acrylic acid functional monomer. By optimizing the formula of the acrylic monomer, increasing the glass transition temperature of the acrylate polymer and reducing the initial adhesion, the acrylate pressure-sensitive adhesive with high viscosity, high light transmittance, high adhesive force and easiness in reworking is prepared, and is used for preparing an explosion-proof membrane with high stripping force, high adhesive property, excellent visual effect and touch feeling.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method and application of an acrylate pressure-sensitive adhesive. Background technique [0002] With the development of science and technology, electronic products play an increasingly important role in our life and work. Compared with traditional pressure-sensitive adhesives, which are widely used in packaging, commercial labels, product process and shipment protection, etc., modern pressure-sensitive adhesives are more used in various electronic products. Pressure-sensitive adhesives mainly include rubber pressure-sensitive adhesives, polyacrylate pressure-sensitive adhesives, polyvinyl ether resins, polyurethane resins, polyisobutylene, etc. Among them, acrylate pressure-sensitive adhesives have excellent weather resistance It is widely used due to its advantages such as non-toxicity, heat resistance and oil resistance, good transparency, and no effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/38C09J133/12C09J7/25C08F220/14C08F220/18C08F222/02C08F220/58C09J133/08
CPCC09J7/385C09J133/24C09J7/255C08F220/14C08F220/1808C09J2467/006C09J2433/00C09J2467/00C08F220/1804C08F220/1811C08F222/02C08F220/58C08F220/06
Inventor 贺海涛朱宁麦启波
Owner CROWN TAICANG ADHESIVE PROD CO LTD
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