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  1. Progress in using hydroxymethylated resorcinol coupling agent to improve bond durability to wood

    In the mid-1990s, researchers at the Forest Products Laboratory developed a coupling agent, hydroxymethylated resorcinol (HMR), that has the ability to enhance adhesive bonds between wood and nontraditional adhesives (Vick and others 1995, 1996). HMR is also effective in promoting durable bonding of phenol-resorcinol- formaldehyde (PRF) adhesives to CCA-treated...

    Author(s):
    Alfred W. Christiansen
    Year:
    2001
    Keywords:
    Hydroxymethylated resorcinol, coupling agents, bond durability, treated wood
    Source:
    2nd International Conference on Advanced Engineered Wood Composites. [S.l. : s.n., 2001]: 3 pages

  2. Improvements to hydroxymethylated resorcinol coupling agent for durable bonding to wood

    Improving the exterior quality bonding of wood to epoxy adhesive resins is important for bonding glass-fiber-reinforced vinyl ester resin laminae to glulam structural members, as well as for repairing glulam members in exterior applications on site. The coupling agent for these applications, hydroxymethylated resorcinol (HMR), was recently improved by using a novolak...

    Author(s):
    Alfred W. Christiansen; E. Arnold Okkonen
    Year:
    2003
    Keywords:
    Hydroxymethylated resorcinol, resorcinol, coupling agents, wood bonding
    Source:
    Forest products journal. Vol. 53, no. 4 (Apr. 2003): Pages 81-84

  3. Chemical and mechanical aspects of HMR primer in relationship to wood bonding

    The mechanism by which hydroxymethylated resorcinol (HMR) primer improves the durability of various adhesives to wood has been hypothesized as covalent chemical links between the adhesive and primer and possibly between the primer and wood. The present work presents experiments to test this hypothesis. In the first test, some resorcinol was displaced by 2- methylres-...

    Author(s):
    Alfred W. Christiansen
    Year:
    2005
    Keywords:
    Hydroxymethylated resorcinol, hmr primer, wood bonding, adhesives, chemical properties, mechanical properties
    Source:
    Forest products journal. Vol. 55, no. 11 (Nov. 2005): pages 73-78.

  4. Assessment of increased wet wood bonding for epoxy-bonded samples using a melamine-urea-formaldehyde priming agent

    Is the hydroxymethylated resorcinol (HMR) primer unique or can a melamine- based primer also increase the wet wood strength of epoxy bonds? Although the exact reason for poor durability with some wood adhesives is not known, the HMR priming agent was found to facilitate durable bonds in most cases tested. A model of cell wall stabilization that is believed to be the...

    Author(s):
    Jermal G. Chandler; Charles R. Frihart
    Year:
    2005
    Keywords:
    Wood surfaces, resorcinol, moisture content, wood moisture, urea-formaldehyde resins, epoxy resins, adhesion, adhesives, testing, formaldehyde, primers, coating, bond strength, strength, melamine resins, bonding, swelling
    Source:
    Wood adhesives 2005 : November 2-4, 2005 ... San Diego, California, USA. Madison, WI : Forest Products Society: ISBN: 1892529459: pages 99-106.

  5. Durable soy-based adhesive dispersions

    An important aspect of any adhesive bond is that the bond maintains its integrity during its end use. Epoxies form highly durable bonds with many substrates but are usually not considered capable of forming completely durable bonds with wood by standard accelerated tests. However, epoxies are sold for wood boat construction, and some data have indicated that epoxies...

    Author(s):
    James M. Wescott; Amy Traska; Charles R. Frihart; Linda Lorenz
    Year:
    2005
    Keywords:
    Viscosity, particle board, adhesives, soyben glue, formaldehyde, phenolic resins, soy flour, durability, MDI, polymeric methylene diisocyanate, phenolic resin glue, phenolic adhesives, bonding, OSB, oriented strandboard
    Source:
    Wood adhesives 2005 : November 2-4, 2005 ... San Diego, California, USA. Madison, WI : Forest Products Society, 2005: ISBN: 1892529459: pages 263-269.

  6. Are epoxy-wood bonds durable enough?

    An important aspect of any adhesive bond is that the bond maintains its integrity during its end use. Epoxies form highly durable bonds with many substrates but are usually not considered capable of forming completely durable bonds with wood by standard accelerated tests. However, epoxies are sold for wood boat construction, and some data have indicated that epoxies...

    Author(s):
    Charles R. Frihart
    Year:
    2005
    Keywords:
    Epoxy resins, adhesives, testing, resorcinol, adhesion, failures in wood, bonding, durability, melamine resins, resorcinol glues, bondline, bond strength, strength, melamine
    Source:
    Wood adhesives 2005 : November 2-4, 2005 ... San Diego, California, USA. Madison, WI : Forest Products Society, 2005: ISBN: 1892529459: pages 241-246.

  7. Model for understanding the durability performance of wood adhesives

    When dry wood is placed in water, the water not only fills the lumen (void in the cells) but also diffuses into the cell walls, causing them to expand. Although the wood becomes weaker via this cell wall plasticization, failure generally increases in the bondline rather than in the wood under wet conditions. Thus, the question is why water exposure often causes a...

    Author(s):
    Charles R. Frihart
    Year:
    2007
    Keywords:
    Wood moisture, adhesion, adhesives, moisture content, testing, bondline, shrinkage, failure, failures in wood, swelling, strength, bond strength, durability, wood bonding, bonding
    Source:
    Proceedings : 30th annual meeting of the Adhesion Society, Inc. : February 18-21, 2007, Tampa Bay, FL. [S.l. : s.n.], c2007: pages 222-224.
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