Chloroprene-based polymer latex composition and adhesive composition

The chloroprene polymer latex composition addresses the challenge of sprayability and initial adhesive strength by adjusting solid content, aggregation rate, and viscosity, resulting in an adhesive with improved fluidity and strong initial adhesion.

JP7869334B2Active Publication Date: 2026-06-02DENKA CO LTD
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Patent Information

Application Number
JP2024561474
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2023-11-06
Filing Date
2023-11-27
Publication Date
2026-06-02
Estimated Expiration
2043-11-27

AI Technical Summary

Technical Problem

Conventional aqueous adhesives containing chloroprene polymer latex compositions often lack sufficient sprayability and initial adhesive strength, making it difficult to achieve both properties simultaneously.

Method used

A chloroprene polymer latex composition is formulated with specific solid content concentration, aggregation rate, and viscosity ranges to enhance sprayability and initial adhesive strength, incorporating chloroprene polymers, conjugated resin acids, nonionic surfactants, and acrylic polymers to achieve optimal mechanical stability and viscosity.

Benefits of technology

The composition provides an adhesive with excellent sprayability, reducing clogging and penetration, ensuring easy application and strong initial adhesion to substrates like polyolefin resins and polyurethane foams.

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Abstract

Provided are: a chloroprene-based polymer latex composition able to yield an adhesive composition having excellent sprayability; and an adhesive composition containing same. According to the present invention, it is possible to provide a chloroprene-based polymer latex composition that contains a chloroprene-based polymer, wherein: when the chloroprene-based polymer latex composition is adjusted to a solid content concentration of 55 mass% and a test chloroprene-based polymer latex composition is obtained, in a mechanical stability test carried out under a load of 10 kg at a rotational speed of 1000 rpm, the aggregate generation rate of the test chloroprene-based polymer latex composition is 0.01-1.00%; and the viscosity of the test chloroprene-based polymer latex composition, as measured using a B type viscometer at 23ºC and 6 rpm, is 22-100 mPa·s.
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Citation Information

Patent Citations

  • Aqueous adhesive

    JP1998053749A

  • Aqueous adhesive composition

    JP2004059895A

  • Aqueous adhesive composition and process for producing the same

    JP2006045476A

  • Chloroprene latex, manufacturing method thereof and application thereof

    JP2016160295A

  • Chloroprene rubber-based polymer latex composition and use thereof

    WO2013141170A1