Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (305 KB bytes)

Title: Durability of one-part polyurethane bonds to wood improved by HMR coupling agent

Author: Vick, Charles B.; Okkonen, E. Arnold.;

Date: 2000

Source: Forest products journal. Vol. 50, no. 10 (Oct. 2000).:p. 69-75 : ill.

Publication Series: Miscellaneous Publication

Description: In a previous study on the strength and durability of a new class of wood adhesives called one-part polyurethanes, four commercial one-part polyurethanes, along with a resorcinol-formaldehyde adhesive representing a standard of performance, were compared in bonds to yellow birch and Douglas-fir in a series of industry-accepted tests (7). The polyurethanes all performed essentially the same: high in dry and wet strength but low in wet wood failure and resistance to delamination. In the study described in this paper, we look at improving the durability of polyurethane bonds to wood by priming before bonding with a hydroxymethylated resorcinol (HMR) coupling agent that is known to enhance adhesion of all thermosetting wood adhesives. The HMR dramatically increased the wet wood failure and resistance to delamination of polyurethanes that were found deficient in the previous study, to levels comparable with the highly durable resorcinol adhesive. One-part polyurethane adhesives met the strength and durability requirements of the most rigorous of tests, specifically American Society for Testing and Materials (ASTM) standard D 2559 (3), when wood surfaces were primed with the HMR coupling agent.

Keywords: Pseudotsuga menziesii, Betula alleghaniensis, Polyurethanes, Adhesives. , Glued joints, Joints (timber), Durability, Strength testing, Failure, Formaldehyde, Resorcinols, Hydroxymethylated resorcinol (HMR), Delamination, Cou

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Vick, Charles B.; Okkonen, E. Arnold. 2000. Durability of one-part polyurethane bonds to wood improved by HMR coupling agent. Forest products journal. Vol. 50, no. 10 (Oct. 2000).:p. 69-75 : ill.


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.