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Dynamic cross-linked SBS hot-melt pressure-sensitive adhesive and preparation method thereof

A hot-melt pressure-sensitive adhesive and dynamic cross-linking technology, used in adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of low softening point, poor heat resistance, low cohesive strength, etc. Improved softening temperature, high mechanical properties, simple and easy-to-operate synthesis process

Active Publication Date: 2021-12-17
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the problems of low softening point, poor heat resistance and low cohesive strength of SBS hot-melt pressure-sensitive adhesive at the present stage, and at the same time realize the purpose of repeated bonding of SBS hot-melt pressure-sensitive adhesive after dynamic cross-linking and improve its practicability , the invention provides a dynamically cross-linked SBS hot-melt pressure-sensitive adhesive, on the other hand, the invention provides a method for preparing a dynamically cross-linked SBS hot-melt pressure-sensitive adhesive

Method used

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  • Dynamic cross-linked SBS hot-melt pressure-sensitive adhesive and preparation method thereof
  • Dynamic cross-linked SBS hot-melt pressure-sensitive adhesive and preparation method thereof
  • Dynamic cross-linked SBS hot-melt pressure-sensitive adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation operation steps of a kind of dynamically cross-linked SBS hot-melt pressure-sensitive adhesive are as follows:

[0039] (1) Preparation of phenylboronate dynamic crosslinking agent

[0040] The phenylboronic ester dynamic crosslinking agent used is the reaction product of 1,4-benzenediboronic acid and 1-thioglycerol, and the preparation method is as follows: 2 g (12 mmol) of 1,4-benzenediboronic acid and 2.59 g ( 24 mmol) of 1-thioglycerol, dissolved in 68.9 g of tetrahydrofuran, and added 17.2 g of anhydrous magnesium sulfate, reacted for 24 hours under nitrogen protection at 30 ° C, filtered to obtain a liquid mixture, and 80% of the tetrahydrofuran to obtain a concentrated solution of the phenylboronate dynamic crosslinker. Finally, the precipitate was washed three times with 700 g of n-hexane to obtain a phenylboronate dynamic crosslinking agent, which was a white solid.

[0041] (2) Prepare the mixture

[0042] Weigh each raw material according t...

Embodiment 2

[0072] The preparation operation steps of a kind of dynamically cross-linked SBS hot-melt pressure-sensitive adhesive are as follows:

[0073] (1) Preparation of phenylboronate dynamic crosslinking agent

[0074] The phenylboronic ester dynamic crosslinking agent used is the reaction product of 1,4-benzenediboronic acid and 1-thioglycerol, and the preparation method is the same as that in Example 1.

[0075] (2) Prepare the mixture

[0076] The antioxidant used is tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester and tris[2,4-di-tert-butylphenyl]phosphite The compound (mass ratio is 3:1), and the ultraviolet photoinitiator is 2,2-dimethoxy-2-phenylacetophenone.

[0077] Weigh each raw material according to the formula, first roll 100 g of SBS thermoplastic elastomer, then add 0.3 g of antioxidant, 0.5 g of ultraviolet photoinitiator and 5 g of phenyl boronate dynamic crosslinking agent in turn for mixing, and start The temperature of the fro...

Embodiment 3

[0083] The preparation operation steps of a kind of dynamically cross-linked SBS hot-melt pressure-sensitive adhesive are as follows:

[0084] (1) Preparation of phenylboronate dynamic crosslinking agent

[0085] The phenylboronic ester dynamic crosslinking agent used is the reaction product of 1,4-benzenediboronic acid and 1-thioglycerol, and the preparation method is the same as that in Example 1.

[0086] (2) Prepare the mixture

[0087] The antioxidant used is tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester and tris[2,4-di-tert-butylphenyl]phosphite The compound (mass ratio is 3:1), and the ultraviolet photoinitiator is 2,2-dimethoxy-2-phenylacetophenone.

[0088] Weigh each raw material according to the formula, first roll 100 g of SBS thermoplastic elastomer, then add 0.3 g of antioxidant, 0.5 g of ultraviolet photoinitiator and 7 g of phenyl borate dynamic crosslinking agent in turn for mixing, and start The temperature of the front...

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Abstract

The invention discloses a dynamically cross-linked SBS hot-melt pressure-sensitive adhesive and a preparation method thereof, and belongs to the technical field of adhesives. The adhesive comprises the following raw materials: an SBS thermoplastic elastomer, an antioxidant, an ultraviolet light initiator and a phenylboronic acid ester dynamic cross-linking agent. The phenylboronic acid ester dynamic cross-linking agent participates in construction of an SBS hot-melt pressure-sensitive adhesive cross-linked network through ultraviolet irradiation, so that the softening temperature of the SBS hot-melt pressure-sensitive adhesive is increased, and the heat resistance of the pressure-sensitive adhesive is improved. Due to the formation of a dynamic cross-linked network, the average molecular weight of the SBS hot-melt pressure-sensitive adhesive is increased, and the body viscosity and cohesive strength of the pressure-sensitive adhesive are obviously improved. Besides, the phenylboronic acid ester covalent bond has excellent ester exchange capacity, and the formed cross-linked network has dynamic characteristics, so that the phenylboronic acid ester covalent bond is fractured and recombined at high temperature, the cross-linked material is endowed with repeatable adhesive property, and the practicability of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a dynamically cross-linked SBS hot-melt pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Hot-melt pressure-sensitive adhesive is a kind of self-adhesive substance, which is coated in a molten state, and can be bonded by applying pressure after cooling and solidification. It can be widely used in packaging, bookbinding, heat-sealing and pressure-sensitive and other fields. Hot-melt pressure-sensitive adhesives are mainly composed of polymers, tackifiers and additives. Among them, SBS thermoplastic elastomer is a commonly used adhesive polymer. It has both the thermoplasticity of styrene and the flexibility and resilience of butadiene. It is compatible with a variety of polymers and acts as a skeleton when used in adhesives to provide the elasticity and cohesive strength of the colloid. SBS soft-segment butadiene (PB) has h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J153/02C09J11/06
CPCC09J153/02C09J11/06C08K5/55
Inventor 方华高高星辰宋楷周文娟丁运生
Owner HEFEI UNIV OF TECH
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