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Compositions and methods for treating cellulose-based materials with micronized additives

a technology of additives and cellulose, applied in the field of compositions and methods for treating cellulose-based materials with micronized additives, can solve the problems of environmental damage, leaching additives, residue bleeding, etc., and achieve the effects of reducing cost, reducing cost, and reducing cos

Inactive Publication Date: 2005-12-01
OSMOSE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] Current technology typically requires the addition of organic solvents, emulsifying agents, etc. Disadvantages of the typical approach used in the art include increased cost, residue bleeding, environmental damage and harmful exposure to leached additive.
[0008] With the inventive compositions disclosed herein, organic solvents and emulsifiers are not required, thus reducing cost. Furthermore, leaching of additives from treated materials is reduced relative to non-micronized or solubilized compositions currently used in the art, thus reducing environmental and exposure risks.
[0009] Also provided is a method for the treatment of wood or wood product with the compositions of the present invention. In one embodiment, the method comprises the steps of 1) providing a mixture comprising micronized additive particles in an aqueous carrier, such as in the form of a dispersion, emulsion, suspension, or other particle / carrier combination, and 2) applying the particles to a wood or wood product. In a further embodiment, the particulate additives have been prepared by the grinding of the additive, optionally in non-micronized particulate form, in wetting agents and / or dispersants such that the additive is reduced to the form of micronized particles. When such a composition is used for preservation of wood, there is minimal leaching of the additive from wood as described herein.

Problems solved by technology

Disadvantages of the typical approach used in the art include increased cost, residue bleeding, environmental damage and harmful exposure to leached additive.

Method used

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  • Compositions and methods for treating cellulose-based materials with micronized additives
  • Compositions and methods for treating cellulose-based materials with micronized additives

Examples

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Effect test

example 1

[0042] Six hundred grams of red iron oxide, 400 g yellow iron oxide and 10 g carbon black are added to a container containing 2850.0 g of water and 150 g of a commercially available dispersant. The mixture is mechanically stirred for about 20 minutes and then added to a grinding mill. The sample is ground for about 1 hour and a stable dispersion is obtained. The particle size of the dispersed product can be analyzed by Horiba LA-910 Particle Size Distribution Analyzer (PSDA). The average particle size is preferably 0.3 microns with a distribution range of 0.04 um to 1.5 um.

[0043] The resulting brown iron oxide dispersion can be diluted with water to make a treating fluid containing 1.0% iron oxide. The treating fluid can be used to treat southern pine samples using a full cell process. The treated samples can be oven dried and tested to check uniform distribution of iron oxide throughout the cross sections and for the presence of a uniform brown color.

example 2

[0044] Nine hundred grams of red iron oxide and 100 g yellow iron oxide are added to a container containing 1550 g of water and 150 g of a commercially available dispersant. The mixture is mechanically stirred for about 20 minutes and then added to a grinding mill. The sample is ground for about 1 hour and a stable dispersion is obtained. The particle size of the dispersed product can be analyzed by Horiba LA-910 Particle Size Distribution Analyzer (PSDA). The average particle size is preferably 0.3 microns with a distribution range of 0.005 um to 1.5 um.

[0045] The resulting dispersion can be diluted with water to make a treating fluid containing 0.5% total iron oxides. The treating fluid can be used to treat southern pine samples using a full cell process. The treated samples can be oven dried and tested to check uniform distribution of iron oxide throughout the cross sections and for the presence of a uniform color.

example 3

[0046] Seven hundred grams of red iron oxide, 200 g yellow iron oxide and 5 g black iron oxide are added to a container containing 2050 g of water and 180 g of a commercially available dispersant. The mixture is mechanically stirred for about 20 minutes and then added to a grinding mill. The sample is ground for about 1 hour and a stable dispersion is obtained. The particle size of the dispersed product can be analyzed by Horiba LA-910 Particle Size Distribution Analyzer (PSDA). The average particle size is preferably 0.35 microns with a distribution range of 0.005 um to 2.0 um.

[0047] The resulting dispersion can be diluted with water to make a treating fluid containing 0.5% total iron oxides. The treating fluid can be used to treat southern pine samples using a full cell process. The treated samples can be oven dried and tested to check uniform distribution of iron oxide throughout the cross sections and for the presence of a uniform color.

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Abstract

A composition for treating cellulosic materials is provided. The composition comprises a dispersion of micronized additives. The dispersion comprises additive particles with diameters in the range of 0.001 to 25 microns. Also provided is a method for the application of the additive-containing composition to wood, as well as wood products which have been treated with the composition.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] Applicant hereby claims priority to U.S. Provisional Application No. 60 / 570,659, filed on May 13, 2004, which is incorporated herein by reference.BACKGROUND [0002] Wood and wood-based substrates, such as paper, particleboard, wood composites, plastic lumbers, rope, etc., are often treated in order to impart desired characteristics to or enhance existing characteristics of the substrate. Non-limiting examples of performance characteristics which can be imparted or enhanced by treatment of a substrate with additives are durability, fire resistance and water resistance. Non-limiting examples of such appearance characteristics are color and texture. Non-limiting examples of additives which can be applied are colorants, pigments, polymers, water repellants, dimensional stabilizing agents, UV inhibitors, UV absorbers, UV blockers, antioxidants, fire retardants and biocides, such as, for example, insecticides, fungicides, moldicides, algaecides...

Claims

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Application Information

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IPC IPC(8): A01N25/12B27K3/16B27K3/34B27K3/52C09D5/14F26B7/00
CPCA01N25/12Y10T428/25B27K3/15B27K3/16B27K3/22B27K3/34B27K3/36B27K3/52B27K5/02C09D5/14B27K3/08B27K3/26B27K3/32Y10T428/254Y10T428/256Y10T428/2982B27K3/005B27K2240/20B27K2240/30B27K2240/90Y10T428/268Y10T428/31895Y10T428/31989Y10T428/662
Inventor LEACH, ROBERT M.ZHANG, JUN
Owner OSMOSE
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