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UV curing pressure-sensitive adhesive with medium peel strength, and preparation method thereof

A technology of peel strength and curing pressure, used in pressure-sensitive films/sheets, adhesives, film/sheet-like adhesives, etc. Effects of cohesive strength and adhesive properties, excellent repeated peelability, excellent adhesive properties

Active Publication Date: 2019-03-29
湖南省和祥润新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity of the prepared glue is too high, the coating film performance is poor, the reusability is not good, and the peel strength can be adjusted relatively poorly.
[0006] The patent document CN106752987A discloses a UV-curable pressure-sensitive adhesive. The UV-curable adhesive is prepared by using acrylate compounds, oligomers containing hydroxyl groups, fumed silica, photoinitiators, and coupling agents. However, the inorganic Silica has poor solubility in the system, is difficult to disperse, and is easy to aggregate and settle. The prepared glue is unstable, the peel strength is too high, and the reusability is poor.
[0007] Patent document CN106566424A discloses a light-responsive UV pressure-sensitive adhesive. The pressure-sensitive adhesive is composed of acrylate copolymer, light-responsive monomer, photopolymerizable monomer, and initiator. The peeling can be adjusted by adjusting the ultraviolet light. Intensity, but it is not easy to control, and in the preparation of acrylate copolymers, adding organic solvents, there may be residual solvents in the system, and outdoor light may affect the bonding performance of photosensitive adhesives and affect their use. Unstable in the presence of light
[0008] Patent document CN105131849A discloses a method for preparing a UV-cured pressure-sensitive adhesive film. The prepared pressure-sensitive adhesive has strong adhesion and high stability, but the peel strength is poorly adjustable and does not have reusability. The viscosity of the prepolymer Too high, it is not easy to form a film, which limits its scope of application

Method used

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  • UV curing pressure-sensitive adhesive with medium peel strength, and preparation method thereof
  • UV curing pressure-sensitive adhesive with medium peel strength, and preparation method thereof
  • UV curing pressure-sensitive adhesive with medium peel strength, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A kind of preparation method of the UV curing pressure-sensitive adhesive of medium peel strength of the present invention:

[0038] (1), preparation of acrylate prepolymer

[0039]Acrylate prepolymer raw material formula 1: 90 parts of isooctyl acrylate, 10 parts of hydroxyethyl acrylate, and the first photoinitiator (TPO) accounts for 0.05% of the total mass of the two monomers.

[0040] Acrylate prepolymer raw material formula two: 87 parts of isooctyl acrylate, 13 parts of acrylic acid, and the first photoinitiator (TPO) accounts for 0.05% of the total mass of the two monomers.

[0041] According to the above-mentioned formula 1 and formula 2, respectively irradiate with ultraviolet light under the protection of nitrogen atmosphere, and then immediately stop the reaction by passing air to obtain two kinds of acrylate prepolymer prepolymers. The viscosities of the prepolymers obtained with different UV irradiation times are different. The viscosities were measured w...

Embodiment 2

[0050] The preparation method of embodiment 2 and comparative example 1-6 is roughly the same as embodiment 1, but the mass proportion of crosslinking monomer (tetramethyldivinyl disiloxane) and acrylate prepolymer is different, initiator The types and proportions are different.

[0051] Embodiment 1,2 and comparative example 1-6 gained UV curable pressure-sensitive adhesive 180 ° of peel strengths, repeated peelability, Shore hardness is tested, test result and crosslinking monomer (tetramethyldivinyl disiloxane Alkane) and the mass proportion of acrylate prepolymer, the kind and consumption of initiator are as shown in table 2, and test method is identical with embodiment 1.

[0052] The formulation (wt%), peel strength and Shore hardness of UV curable pressure-sensitive adhesive in Table 2 (peel strength and Shore hardness are the average value of ten data for each group of formulations, and the repeated peel strength is the repeated paste of the sample Take the average va...

Embodiment 3 and comparative example 7-13

[0057] The preparation method of embodiment 3 and comparative example 7-13 is roughly the same as embodiment 1, but cross-linking monomer is changed into hexanediol diacrylate (HDDA), and its mass ratio with acrylate prepolymer is different, Moreover, the addition ratio of the hexanediol diacrylate used is different, and the type and amount of the initiator are different.

[0058] Embodiment 3 and comparative example 7-13 gained UV curable pressure-sensitive adhesive 180 ° peel strength, repeated peeling property, Shore hardness is tested, test result and hexanediol diacrylate (HDDA) and acrylate prepolymer The mass ratio, initiator type and consumption are shown in Table 3, and the test method is the same as in Example 1.

[0059] The formula (wt%), peel strength and Shore hardness of UV curable pressure-sensitive adhesive in Table 3 (peel strength and Shore hardness are the average value of ten data for each group of formulas, and the repeated peel strength is the repeated p...

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Abstract

The invention discloses an UV curing pressure-sensitive adhesive with a medium peel strength, and a preparation method thereof. The UV curing pressure-sensitive adhesive comprises, by weight, 100 parts of an acrylate prepolymer, 0.05-10 parts of a crosslinking monomer, and a second photoinitiator; the acrylate prepolymer is formed by ultraviolet light irradiation polymerization of prepolymer monomers under the action of a first photoinitiator, the prepolymer monomers comprise, by mass, 85-90% of isooctyl acrylate and 10-15% of acrylic acid or hydroxyethyl acrylate, and the addition amount of the first photoinitiator is 0.01-0.5% of the mass of the prepolymer monomers; and the addition amount of the second photoinitiator is 0.5-5% of the mass of the acrylate prepolymer. The UV curing pressure-sensitive adhesive has the advantages of moderate peel strength, moderate flexibility and good reusability.

Description

technical field [0001] The invention relates to the technical field of ultraviolet curing adhesives, in particular to a medium peel strength UV curing pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] In recent years, the UV-curable pressure-sensitive adhesive industry has developed rapidly due to its unique advantages: solvent-free processing, low cost and low energy consumption, new characteristics and high-quality chemical cross-linking. Acrylic pressure-sensitive adhesives have been widely used in solvent-free UV-curable pressure-sensitive adhesives due to their excellent physical properties and aging stability. Acrylic pressure-sensitive adhesives are mainly used in industries such as labels, tapes, transparent office supplies, packaging, transportation, medical applications, and bonding of metal plates. [0003] With the development of market demand and science and technology, newer and higher requirements are put forward for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/38C09J7/25C08F220/18C08F220/20C08F220/06C08F2/48
CPCC08F2/48C08F220/18C09J2433/00C09J2467/006C09J7/255C09J7/385C08F220/1808C09J2301/122C09J2301/302C08F220/20C08F220/06
Inventor 廖平湘曾诚林晓丹
Owner 湖南省和祥润新材料有限公司
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