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Chemistry and Industry of Forest Products ›› 2021, Vol. 41 ›› Issue (6): 57-66.doi: 10.3969/j.issn.0253-2417.2021.06.008

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Cross-linked Acrylic Emulsion and Its Application in Decorative Paper

Gaowei FU1,2(), Wanglong FENG1,2, Dingkun WANG1,2, Riqing CHEN1,*(), Chunpeng WANG1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2020-11-26 Online:2021-12-28 Published:2021-12-31
  • Contact: Riqing CHEN E-mail:785849751@qq.com;michaelmao77@163.com

Abstract:

The acrylic emulsion adhesive was prepared by semi-continuous seed emulsion method with using acetoacetoxyethyl methacrylate(AAEM) as the crosslinking agent. The effects of AAEM amount on acrylic emulsion polymerization and its application as an adhesive for the decorative paper were investigated by infrared spectrometer, differential scanning calorimeter, thermogravimetric analyzer, scanning electron microscope, universal material testing machine, etc.. The IR results showed that AAEM was successfully participated in the emulsion copolymerization reaction. The particle size and viscosity of the acrylate emulsion modified by AAEM were below 90 nm and 21.0 mPa·s, respectively, and the monomer conversion rate was above 97% and the crosslinking degree of the film obtained from acrytic emulsion reached 90.61%. The modification of AAEM improved the crosslinking degree, thermal stability and water resistance of the obtained acrylate polymer. The impregnation test of the impregnated paper verified that the acrylic emulsion was successfully impregnated into the decorative papers, and greatly improved their mechanical properties, surface bonding strength, surface water resistance. The volatile content and pre-curing degree of the impregnated paper prepared by cross-linked acrylic emulsion, basically maintained at 12%-15% and 62%-65% when it was dipped; the tensile strength and elongation at break were up to 25 MPa and 26.9%, respectively, which were increased by 13 MPa and 25.1% while compared with that of the controlled sample. And the maximum contact angle was 113° and the surface bonding strength reached 0.826 MPa.

Key words: emulsion polymerization, crosslinking monomer, AAEM, acrylic, thermosetting resins paper

CLC Number: