Self-adhesive adhesive composition and self-adhesive product

A self-adhesive adhesive composition combining chloroprene rubber latexes and a tackifier resin addresses the need for latex-free, solvent-free adhesives with low tackiness and high self-adhesion, suitable for medical applications.

JP7682010B2Active Publication Date: 2025-05-23NICHIBAN KK
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Patent Information

Application Number
JP2021074381
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-04-26
Publication Date
2025-05-23
Estimated Expiration
2041-04-26

AI Technical Summary

Technical Problem

There is a demand for self-adhesive adhesives that are free of natural rubber latex and solvent-free, while also requiring low tackiness and high self-adhesion, particularly for medical applications where latex allergies are a concern and solvent-based adhesives pose environmental and health risks.

Method used

A self-adhesive pressure-sensitive adhesive composition is developed, comprising a combination of chloroprene rubber latex made of a chloroprene homopolymer and a chloroprene polymer with a carboxyl group, in specific mass ratios, along with an optional tackifier resin, to achieve the desired balance of low tackiness and high self-adhesion.

Benefits of technology

The composition achieves a balance of low initial tackiness and high self-adhesive strength, allowing for easy unwinding and strong adhesion, making it suitable for medical and hygiene applications without the risks associated with natural rubber latex or solvents.

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Abstract

To provide a new autohesive adhesive composition and a new autohesive product that no longer rely on natural rubber latex and solvent-based adhesives, and achieve low tackiness and high autohesiveness required for autohesive adhesives.SOLUTION: An autohesive adhesive composition contains (a) chloroprene rubber latex composed of a chloroprene homopolymer, and (b) chloroprene rubber latex composed of a chloroprene polymer having a carboxyl group in each molecule, with the mass ratio between (a) and (b) in terms of solid content: (a): (b)=90: 10-30: 70.SELECTED DRAWING: None
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Claims

1. A self-adhesive product having a substrate and a self-adhesive layer formed from a self-adhesive composition on at least one surface of the substrate, the self-adhesive composition comprising: (a) a chloroprene rubber latex comprising a chloroprene homopolymer, and (b) a chloroprene rubber latex made of a chloroprene polymer which is a copolymer of chloroprene and methacrylic acid; Contains The (a) and (b) are contained in a mass ratio of (a):(b)=90:10 to 30:70 in terms of solid content, Self-wearing products.

2. The self-adhesive adhesive composition further comprises: (c) Tackifying resin The self-adhesive product according to claim 1, wherein (c) is contained in an amount of 20 to 40 parts by mass per 100 parts by mass of the total of (a) and (b) in terms of solid content.

Citation Information

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