B - Operations – Transporting – 27 – K
Patent
B - Operations, Transporting
27
K
117/124, 6/14.5
B27K 3/52 (2006.01) B27K 3/12 (2006.01) B27K 3/14 (2006.01)
Patent
CA 1058353
ABSTRACT OF THE DISCLOSURE A novel thickened wood treating composition and procedure for application as a covered layer to a wood surface for treating wood are provided herein. The composition includes (A) a preservative component which is either (i) a normally water-insoluble salt which is either zinc arsenate, zinc arsenite, copper arsenate or copper arsenite or mixtures thereof; or (ii) an ammonia-soluble salt which is either copper borate or zinc borate or mixtures thereof, or copper chromate or zinc chromate or mixtures thereof; or (iii) an ammonia dispersible organometallic compound which is either of copper naphthenate, zinc napthenate or mixtures thereof, copper-8-quinolinolate, zinc-8-quinolinolate or mixtures thereof, or tributyltin oxide; and, together with one of the above, (iv) sufficient aqueous ammonia, in a concentration of 1 to 28% by weight NH3 to solubilize the normally water-insoluble salt (i), or the ammonia-soluble salt (ii) or to disperse the organo- metallic compound (iii). It also includes (B) a sufficient amount of a thickener of a particularly recited (v) single phase type, or a particularly recited (vi) the mastic type, to provide a thickened composition having a viscosity of 30- 120 poises (Brookfield Viscometer 25°C) for dip application; of 250-800 poises for mechanical deposition; or even thicker and thixotropic for trowel application. This provides a composition which can be used to provide preservative protection to wooden poles whether they be in service, or prior to being used, and whether the poles are wet or dry. The composition is applied to the wooden poles, and an ammonia-impervious atmosphere is created around the pole for a time sufficient to permit penetration of the pole. Such atmosphere may, for example, be provided by an ammonia-impervious sheet, wrap or tape material, e.g., polyethylene film.
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