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Preparation method of polytetrafluoroethylene/polyacrylate core-shell emulsion for pressure-sensitive adhesive

A technology of polyacrylate and polytetrafluoroethylene, which is applied in the field of preparation of polytetrafluoroethylene/polyacrylate hybrid latex, can solve problems such as poor water resistance, poor high temperature resistance, and serious environmental pollution, and reduce Improvement of water absorption, initial adhesion and peel strength, and reduction of environmental pollution

Active Publication Date: 2020-05-26
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of serious environmental pollution, poor high temperature resistance, solvent resistance and water resistance in the preparation of pressure-sensitive adhesives in the traditional process, and propose a method for preparing an environment-friendly high-performance pressure-sensitive adhesive

Method used

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  • Preparation method of polytetrafluoroethylene/polyacrylate core-shell emulsion for pressure-sensitive adhesive
  • Preparation method of polytetrafluoroethylene/polyacrylate core-shell emulsion for pressure-sensitive adhesive
  • Preparation method of polytetrafluoroethylene/polyacrylate core-shell emulsion for pressure-sensitive adhesive

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Embodiment 1

[0036] a. Preparation of seed pre-emulsion

[0037] First, into a 500ml four-necked flask, add 0.5g of emulsifier dipentyl sodium sulfonate, 3.6g of PTFE dispersion (solid content 60%, particle size 118nm, and the solvent of the dispersion is water) and 190g The deionized water was mixed and stirred for 30min under an argon atmosphere to obtain a seed pre-emulsion, which was used for later use;

[0038] b. Preparation of shell monomer pre-emulsion

[0039] 102g of amyl acrylate and 68g of nonyl acrylate, 2g of hard monomer acrylic acid, 8g of hard monomer hydroxyethyl acrylate, 2.25g of anionic emulsifier dipentyl sulfonate sodium, 1.9g of chain Transfer agent dodecyl mercaptan, 0.3 g of cross-linking agent allyl methacrylate and 0.2 g of cross-linking agent dicyclopentenyl acrylate were added to the beaker, mixed and stirred for 20 min to obtain a shell layer pre-emulsion, spare;

[0040] c. Preparation of core-shell emulsion

[0041] First, the reactor containing the seed ...

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Abstract

The invention discloses a preparation method of a polytetrafluoroethylene / polyacrylate core-shell emulsion for a pressure-sensitive adhesive. The preparation method comprises the following steps: a, preparing a seed preemulsion; b, preparing a shell-layer monomer preemulsion; c, preparing the core-shell emulsion. By the preparation method, with a polytetrafluoroethylene emulsion as a seed and a copolymer of acrylic monomers as a shell, a composite modified emulsion adopting a core-shell structure is prepared, and the external seed polytetrafluoroethylene is creatively introduced. Through control of the addition amount of the PTFE seed in the seed stage and the using amount of a shell-layer crosslinking agent, the pressure-sensitive property of the pressure-sensitive adhesive is controlled.By the preparation method, the controllability of morphologies, compositions and structures of latex particles is achieved, the experimental operation is simple, and environment pollution is avoided.

Description

Technical field: [0001] The invention relates to the field of pressure-sensitive adhesives for adhesives, in particular to a preparation method of polytetrafluoroethylene / polyacrylate hybrid latex. Background technique: [0002] Pressure-sensitive adhesive (PSA) is a type of viscoelastic material that can bond to the surface of the adherend under a small contact pressure and a short contact time. Generally, it can be prepared in several ways such as emulsion type, solvent type, hot melt type and radiation curing type. He Min et al. developed a polyacrylate pressure-sensitive adhesive for surface protection film through solution polymerization. Studies have shown that the addition of functional monomer acrylic acid can improve the cohesive strength of the pressure-sensitive adhesive; as the amount of cross-linking agent increases from 0.5% to 1.5%, the high-temperature resistance of the pressure-sensitive adhesive increases significantly. When the dosage is 1.5%, the protec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/06C08F220/20C08F2/26C08F4/40C09J133/08C09J127/18
CPCC08F2/26C08F4/40C08F220/18C09J127/18C09J133/08C08F220/1809C08F220/06C08F220/20
Inventor 瞿雄伟于辉徐晨张广林
Owner HEBEI UNIV OF TECH
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