Ultralow-viscosity pressure-sensitive adhesive and ultralow-viscosity protective film

Abstract

The invention provides an ultralow-viscosity pressure-sensitive adhesive and an ultralow-viscosity protective film. The ultralow-viscosity pressure-sensitive adhesive is composed of the following components in parts by weight: 100 parts of monomer, 0.1-1.2 parts of initiator, 50-150 parts of water, 0.3-2 parts of emulsifier, 3-5 parts of inner crosslinking agent, 0.3-0.6 part of outer crosslinking agent, 0.1-1.6 parts of assistant and 0.1-1 part of buffering agent. Compared with the prior art, the glass transition temperature of the monomer is lower, thereby ensuring the softness required by the adhesive layer; the inner crosslinking agent is added to increase the molecular weight of the ultralow-viscosity pressure-sensitive adhesive part, so that macromolecules and micromolecules are distributed in a certain state, thereby compromising the balance between the initial viscosity and cohesive force; and the outer crosslinking agent is added into the ultralow-viscosity pressure-sensitive adhesive, so that molecular chains are further crosslinked in the film formation process of the pressure-sensitive adhesive, thereby effectively lowering the peel strength of the pressure-sensitive adhesive and enhancing the high temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to an ultra-low viscosity pressure-sensitive adhesive and an ultra-low viscosity protective film. Background technique [0002] With the rapid development of automobiles, electronics, and circuits, the domestic demand for high-grade protective films that has long relied on imports is increasing day by day. Correspondingly, pressure-sensitive adhesives for high-grade protective films, especially ultra-low viscosity protective films, have also been greatly developed. In recent years, the high-end protective film products on the market are generally imported, or the imported protective film is coated with pressure-sensitive adhesive to form a product, while the pressure-sensitive adhesive for domestic related protective film generally stays at For mid-to-low-end products, most of the domestic companies have imported technology, high-end protective film coating lines and p...

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Problems solved by technology

[0004] The Chinese patent with the publication number CN102533180A discloses an ultra-low viscosity pressure-sensitive adhesive, comprising 25-31 parts by weight of polymethacrylate ethyl acetate solution, 0.5-1.6 parts by weight of cross-linking agent, 0.03-1.1 parts by weight functional macromolecules, 0.001-0.04 parts by weight catalyst and 67-72 parts by weight ethyl acetate, the ultra-low viscosity pressure-sensitive adhesive has good adhesion to polyethylene film, but it is also solvent-based ultra-low Viscous pressure-sensitive adhesive, there is a hidden danger of organic solvents causing environmental pollution, and the production cost is relatively high

[0005] The Chinese patent with the publication number CN10263402A discloses an environmentally friendly peelable pressure-sensitive adhesive for surface protection film. The pressure-sensitive adhesive uses water as a solvent and has the advantages of good water resistance and no adhesive residue. However, it does not Solve the problem of ultra-low adhesion and peel force

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