Adhesive-Coated Dowel
AssigneeGeorgia-Pacific Chemicals LLC
InventorsRobert A. Breyer, Bobby L. Williamson, Steven O. Clausen, Daniel Tingley
Life of this patent
Estimating the term…
Abstract
A dowel coated with a heat-activated, B-staged formaldehyde-based resin and a related method of using the resin-coated dowel for joining separate components together.
Claims11
An adhesive coated dowel comprising a dowel substrate having an outer surface and first and second ends wherein the outer surface of the dowel substrate is coated with a B-staged formaldehyde-based resin.
A method for connecting an adhesive coated dowel to a component part comprising the steps of:
- (A) providing a dowel having an outer surface and first and second ends, the dowel having a coating of a B-staged formaldehyde-based resin on the outer surface;
- (B) providing a component having an opening configured to receive the first end of the dowel so that a surface of the opening contacts a portion of the coated outer surface of the dowel;
- (C) introducing steam into the opening of the component to heat and dampen the surface of the opening;
- (D) inserting the first end of the dowel into the heated and dampened opening in the component to initiate curing of the B-staged formaldehyde-based resin and cause the resin to harden and form an adhesive bond between the surface of the opening and the portion of the coated outer surface of the dowel.
A method for connecting component parts together with an adhesive coated dowel comprising the steps of:
- (A) providing a dowel having an outer surface and first and second ends, the dowel having a coating of a B-staged formaldehyde-based resin on the outer surface;
- (B) providing a first component part having a first opening configured to receive the first end of the dowel so that a surface of the first opening contacts a first portion of the coated outer surface of the dowel;
- (C) providing a second component part having a second opening configured to receive the second end of the dowel so that a surface of the second opening contacts a second portion of the coated outer surface of the dowel;
- (D) introducing steam into the first opening of the first component part to heat and dampen the surface of the first opening;
- (E) introducing steam into the second opening of the second component part to heat and dampen the surface of the second opening;
- (F) inserting the first end of the dowel into the heated and dampened first opening in the first component part to initiate curing of the B-staged formaldehyde-based resin and cause the resin to harden and form an adhesive bond between the surface of the first opening and the first portion of the coated outer surface of the dowel;
- and
- (G) inserting the second end of the dowel into the heated and dampened second opening in the second component part to initiate curing of the B-staged formaldehyde-based resin and cause the resin to harden and form an adhesive bond between the surface of the second opening and the second portion of the coated outer surface of the dowel.
A phenol-formaldehyde resole resin prepared by reacting substantially a full complement of phenol with two or more additions of a full complement of formaldehyde and two or more additions of a full complement of alkaline catalyst;
- wherein the resole resin is prepared at a formaldehyde to phenol (F:P) mole ratio of between 1.8 and 2.4 using 0.1 to 0.7 moles of the alkaline catalyst per mole of phenol.
Dependencies are inferred from the claim text.