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Development of polyvinyl acetate emulsion with reactive PVA as protective colloid and investigate its reactivity

Research Project

Project/Area Number 16580130
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 林産科学・木質工学
Research InstitutionShizuoka Univ.

Principal Investigator

YAMADA Masaaki  Shizuoka Univ., Research associate, 農学部, 助手 (20293615)

Co-Investigator(Kenkyū-buntansha) YOSHIDA Hiroaki  Shizuoka Univ., Professor, 農学部, 教授 (10126790)
TAKI Kinji  Shizuoka Univ., Professor, 農学部, 教授 (00022252)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2005: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2004: ¥2,700,000 (Direct Cost: ¥2,700,000)
Keywordsnon-formaldehyde adhesive / water based emulsion / reactive PVA / isocyanate chemical compound / dynamic viscoelasticity / wood adhesion / crosslink / environmental corespondence / PMDI / 耐水性能
Research Abstract

Recently, acetoacetylated PVA (AAPVA) that replaced the reactive acetoacetyl group with part of the PVA side-chain was introduced, and waterproof type polyvinyl acetate emulsion (EPVAc) that uses it as the protective colloid of the emulsion adhesive was synthesized due to investigate the characteristic of this EPVAc. Its physical property and wood bonding performance was investigated.
1)It was proven that dissolution and hygroscopicity of EPVAc films with AAPVA as the protective colloid were improved. And, it was proven that the degree of the plasticization of films by the moisture absorption was low and that it holds the lowering of the storage modulus by the heating treatment for EPVAc films with AAPVA as the protective colloid.
3)The waterproof performance of EPVAc using AA PVA was higher than EPVAc using normal PVA, and the wood bonding performance was rapidly improved, especially in the case of the heating treatment at 120℃.
And using acetoacetylated (AA) PVA with various degrees of acetoacetylation and ordinary partially saponified PVA, the following facts were obtained as the result of examining the reactivity with an added isocyanate compound (pMDI) in AA PVA aqueous solution and the formation of crosslinking by heat treatment as compared with ordinary PVA.
1)The rate of consuming NCO groups in the PVA aqueous solution was higher with AA PVA than with ordinary PVA. The reactivity of the AA group in AA PVA for the NCO group in pMDI was higher than that of the OH group.
2)The crosslinking density of PVA, which was calculated from the E' value of the rubber flat region of the cured film, increased with the degree of acetoacetylation.
The ability of the PVA aqueous solution to bond wood improved by the addition of pMDI. Curing at 120℃ resulted in superior waterproof adhesion for AA PVA.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (13 results)

All 2005 2004 Other

All Journal Article (13 results)

  • [Journal Article] 木材とアセトアセチル化PVAの相互作用2005

    • Author(s)
      山田雅章, 川上智子, 滝 欽二, 吉田弥明, 渋谷光夫
    • Journal Title

      日本接着学会第43回年次大会講演要旨集

      Pages: 15-16

    • Related Report
      2005 Annual Research Report
  • [Journal Article] アセトアセチル化PVAの反応性と木材接着性能2005

    • Author(s)
      山田雅章, 滝 欽二, 渋谷光夫
    • Journal Title

      日本接着学中部支部第4回産官学接着若手フォーラム講演プログラム

      Pages: 19-19

    • Related Report
      2005 Annual Research Report
  • [Journal Article] アセトアセチル化PVAを保護コロイドとしたアクリル樹脂エマルジョンの物性と木材接着性能(3)2005

    • Author(s)
      山田雅章他4名
    • Journal Title

      第55回日本木材学会大会研究発表要旨集 (発表予定)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] アセトアセチル化PVAを保護コロイドとしたアクリル樹脂エマルジョンの物性と木材接着性能(1)2004

    • Author(s)
      篠原弘樹, 山田雅章他4名
    • Journal Title

      日本接着学会第42回年次大会講演要旨集

      Pages: 37-37

    • NAID

      10023962065

    • Related Report
      2004 Annual Research Report
  • [Journal Article] アセトアセチル化PVAを保護コロイドとしたアクリル樹脂エマルジョンの物性と木材接着性能(2)2004

    • Author(s)
      篠原弘樹, 山田雅章他4名
    • Journal Title

      第54回日本木材学会大会研究発表要旨集

      Pages: 266-266

    • Related Report
      2004 Annual Research Report
  • [Journal Article] アセトアセチル化PVAの反応性と木材接着性能2004

    • Author(s)
      山田雅章
    • Journal Title

      第35回中部化学関係学協会支部連合秋季大会講演予稿集

      Pages: 24-24

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 沙柳を原料としたファイバーボードの製造と材質2004

    • Author(s)
      烏日図, 山田雅章他3名
    • Journal Title

      日本木材加工技術協会第22回年次大会研究講演要旨集

      Pages: 83-83

    • Related Report
      2004 Annual Research Report
  • [Journal Article] アセトアセチル化PVAを保護コロイドに使用した酢酸ビニル樹脂エマルジョンの物性と接着性

    • Author(s)
      山田雅章, 滝欽二, 吉田弥明, 江崎竜彦
    • Journal Title

      木材学会誌 投稿中

    • NAID

      10018503359

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] アセトアセチル化PVAとイソシアネート化合物との反応

    • Author(s)
      山田雅章, 滝欽二, 渋谷光夫
    • Journal Title

      日本接着学会誌 投稿中

    • NAID

      10019370211

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] AA化PVA水溶液のpMDI分散特性と木材接着性能(第1報)-PVA水溶液中でのpMDIの分散性と反応性-

    • Author(s)
      山田雅章, 前田理恵子, 滝欽二, 渋谷光夫
    • Journal Title

      日本接着学会誌 投稿中

    • NAID

      10018428618

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Physical properties and wood bonding performance of polyvinyl acetate emulsion with acetoacetylated PVA as protective colloid

    • Author(s)
      Masaaki Yamada, Kinji Taki, Tastuhiko ezaki
    • Journal Title

      Mokuzai gakkaisi (in press)

    • NAID

      10018503359

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] The reaction of acetoacetylated PVA and isocyanate chemical compound.

    • Author(s)
      Masaaki Yamada, Kinji Taki, Mitsuo Shibutani
    • Journal Title

      Nihon seccyaku gakkaisi (in press)

    • NAID

      10019370211

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] pMDI dispersion property and wood bonding performance of the acetacetylated PVA aqueous solution (first report) -Dispersion property and reactivity of pMDI in the PVA aqueous solution-

    • Author(s)
      Masaaki Yamada, Kinji Taki, Rieko Maeda, Mitsuo Shibutani
    • Journal Title

      Nihon seccyaku gakkaisi (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary

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Published: 2004-04-01   Modified: 2016-04-21  

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