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US 8,476,345 B2Granted
Use of oily soft waxes as hydrophobizing agents in timber products, timber products thus produced, and processes for introducing soft waxes into timber products
OwnerThomas Buchholzinventor
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Abstract
An aqueous wax dispersion comprising a soft wax having an oil content of greater than 20 wt % and from 0.5 wt % to 10 wt % urea for use as a hydrophobizing agent in the production of timber products. The soft wax has a softening point of less than 65° C. and is solid at about 10° C. and below.
Claims30
An aqueous wax dispersion for a hydrophobizing agent in the production of wood-based materials comprising:
- a soft wax as solid phase or component of a solid phase, the soft wax comprising an oil content of greater than 20 wt %, wherein the soft wax is solid at a temperature above 10° C. and has a softening point of less than 65° C.;
- and
- from 0.5 wt % to 10 wt %, based on the wax dispersion, of urea.
A hydrophobic wood-based material comprising:
- at least one binder;
- a wood-based material;
- a soft wax, the soft wax comprising an oil content of greater than 20 wt %, wherein the soft wax is solid at a temperature above 10° C. and has a softening point of less than 65° C.;
- and
- urea wherein the wood-based material comprises as a wood component, wood shavings, wood chippings, wood fibers, mixtures thereof and products made therefrom.
2 more elements
A method for producing wood-based materials hydrophobized with wax, comprising treating in any order lignocellulose containing material with:
- a soft wax, wherein the soft wax has an oil content greater than 20 wt %;
- and is solid at a temperature above 10° C. and has a softening point below 65° C.,
- 0.5 wt % to 10 wt % of urea, and
- at least one binder.
1 more element
Dependencies are inferred from the claim text.