• Title/Summary/Keyword: phenol-formaldehyde (PE) resin

Search Result 3, Processing Time 0.016 seconds

Synthesis of Resol Type Phenol Resins and Their Reaction Properties (Resol형 페놀수지의 합성과 반응특성)

  • Kim, Dong-Kwon;Joe, Ji-Eun;Kim, Jung-Hun;Park, In Jun;Lee, Soo-Bok
    • Applied Chemistry for Engineering
    • /
    • v.16 no.2
    • /
    • pp.288-291
    • /
    • 2005
  • Resol type phenol-formaldehyde (PF) resin was synthesized by addition reaction of formaldehyde (F) and phenol (P). And the PF resin was synthesized by condensation reaction in which water was removed. In this work, we studied the influence of experimental parameters in the addition reaction, such as F/P mole ratio, amount of catalyst, reaction temperature, reaction time, and so on. Also, we studied the influence of molecular weight and viscosity of PE resin as a function of condensation time. As a result, in addition reaction, the reaction time decreased remarkably as the catalyst concentration increased, and the time decreased with increasing reaction temperature at a constant catalyst concentration. Also, in condensation reaction, the viscosity of resol type PF resin increased from 1500 to 9000 cps as a function of condensation time; molecular weight showed from 500 to 1100 g/mol.

Physical Properties of Hybrid Poplar Flakeboard Bonded with Alkaline Phenolic Soy Adhesives

  • Yang, In;Kuo, Monlin;Myers, Deland J.
    • Journal of the Korean Wood Science and Technology
    • /
    • v.33 no.5 s.133
    • /
    • pp.66-75
    • /
    • 2005
  • Soybean-based adhesives have recently been reconsidered as alternatives to petroleum-based adhesives due to the uncertainty of availability of petrochemical products and the increased demand for wood adhesives. This study was conducted to investigate the adhesive properties of alkaline phenolic soy (APS) resin for hybrid poplar flakeboard. The APS resin was formulated by crosslinking an alkaline soy flour hydrolyzate with lab-prepared PF resin in the soy hydrolyzate to PF resin weight ratios of 70/30, 60/40, and 50/50. The APS resins were used to fabricate homogeneous hybrid poplar flakeboards with different resin solid levels (5%, 7%, and 9%), press temperatures (175 and $200^{\circ}C$), and press times of 8 and 10 minutes. The IB, wet MOR, and dimensional stability properties of board improved with increasing press time, press temperature, and PF level in APS resins. Increasing press time can be used to offset poor IB strength associated with a 9% resin solid level and the excessive moisture content in the mat. The following conditions were concluded to meet the requirements of the CSA standard for exterior-grade flakeboard: a 50% PF level, a 5% resin content, a $200^{\circ}C$ press temperature, and an 8 minute press time.

A Study on the Synthesis of Acrylic Phenol Resins and Their Properties as a Paint (아크릴계 페놀수지 합성과 이를 이용한 도료의 물성연구)

  • Hwang, Sue In;Kim, Young Jin;Kim, Dong Kwon
    • Applied Chemistry for Engineering
    • /
    • v.24 no.2
    • /
    • pp.171-176
    • /
    • 2013
  • The need of volatile organic compound (VOC) free coating material has been increased to solve environmental problems such as the global warming. Nowadays, about 70~80% of coating materials used in the worldwide are a liquid type. Therefore, the development of non-solvent coating material that can minimize VOCs emissions is necessary to solve the global warming problem. In this study, acrylic monomers were added to develop non-solvent paints in order to improve disadvantages of the poor adhesion of a conventional phenolic resin caused by acidification. As a result, the blend resins of 2.818 Mpa phenol- formaldehyde resin/poly methyl methacrylate (PE/PMMA) has the best properties and performances for the adhesives.