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US 9,308,667 B2Granted
Method for increasing the water resistance of a porous material, compositions therefor and porous materials treated according to the method
AssigneeSuperwood A/S
InventorFinn Imsgard
Life of this patent
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Abstract
The present invention relates to a method for increasing the water resistance of a porous material, in particular wood, in which method a block-polymer comprising at least one hydrophobic block and at least one hydrophilic block, is dissolved in a fluid and applied to the material under supercritical conditions.
Claims18
A method for providing water resistance to a porous material comprising the steps of:
- a1) applying at least two polymers to the porous material;
- or
- a2) mixing at least two polymers with a first fluid;
- and
- b) if step a1) is performed, subsequently treating the porous material with a first fluid under supercritical conditions, and if step a2) is performed, subsequently treating the porous material with the first fluid having the at least two polymers under supercritical conditions;
- wherein the at least two polymers are a first block-polymer and a second block-polymer comprising at least one hydrophobic block and at least one hydrophilic block;
- and,
- wherein the first block-polymer and the second block-polymer are independently chosen and are different from each other.
5 more elements
A method for providing water resistance to a porous material comprising the steps of:
- a) applying at least two polymers to the porous material;
- and,
- b) treating the porous material with a fluid under supercritical conditions;
- wherein the at least two polymers are a first block-polymer and a second block-polymer comprising at least one hydrophobic block and at least one hydrophilic block;
- and,
- wherein the first block-polymer and the second block-polymer are independently chosen and are different from each other.
3 more elements
A method for providing water resistance to a porous material comprising the steps of:
- a) mixing at least two polymers with a fluid;
- and,
- b) treating the porous material with the fluid including the at least two polymers under supercritical conditions;
- wherein the at least two polymers are a first block-polymer and a second block-polymer comprising at least one hydrophobic block and at least one hydrophilic block;
- and,
- wherein the first block-polymer and the second block-polymer are independently chosen and are different from each other.
3 more elements
Dependencies are inferred from the claim text.