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US 9,988,575 B2Granted
Polyurethane foam for use as soil improver
AssigneeHuntsman International LLC
InventorsAnnelies Vandevelde, Herman Eugene Germain Moureau, Fabio Invernizzi, Robert Weggelaar
Life of this patent
Estimating the term…
Abstract
Polyurethane foam flakes for use as additive to soil and/or other natural plant growth media for improving the water retention and/or reduction of the methane emission.
Claims12
A plant growth substrate comprising:
- soil and/or other natural growth media, and
- polyurethane foam flakes as an additive;
- wherein the polyurethane foam flakes have a density of 25-100 kg/m3, a compression load deflection (CLD) at 40% of 5-50 kPa, a volume increase at water saturation of at most 25% and a water buffer capacity of 35-80%, wherein the polyurethane foam flakes have dimensions in the range 0.1-100 mm, and wherein the polyurethane foam flakes are present in the plant growth substrate in an amount ranging from 15 to 60 volume % where the volume % is calculated as the volume of polyurethane foam flakes in the total volume of plant growth substrate comprising the polyurethane foam flakes when the soil and/or other natural grown media are under aerobic conditions.
A plant growth substrate comprising:
- soil and/or other natural growth media, and
- polyurethane foam flakes as an additive;
- wherein the polyurethane foam flakes have a density of 25-100 kg/m3, a compression load deflection (CLD) at 40% of 5-50 kPa, a volume increase at water saturation of at most 25% and a water buffer capacity of 35-80%, wherein the polyurethane foam flakes have dimensions in the range 0.1-100 mm, and wherein the amount of soil and/or other natural growth media to polyurethane foam flakes in the plant growth substrate has a volume ratio ranging from 10:90 to 90:10 volume % where the volume % is calculated as the volume of polyurethane foam flakes in the total volume of plant growth substrate comprising the polyurethane foam flakes when the soil and/or other natural grown media are under anaerobic conditions.
Dependencies are inferred from the claim text.