Loading patent…
AssigneeJames Hardie Technology Limited
InventorsHamid HOJAJI, Caidian LUO, Liyan MA
Estimating the term…
Low density additives and methods of making said additives for composite materials are provided. The low density additives have at least a partial or complete water repellant property that reduces moisture migration, absorption, and retention within a composite material in which it is incorporated into. Active sites are engineered onto the surface of the low density additives to enhance bonding of the additives within a composite matrix. Reduced water movement and enhanced bonding lead to an increased strength and durability performance for a composite material comprising such additives. Composite materials incorporating one or more engineered low density additives as also provided, such composite materials having enhanced strength and durability. Such composite materials may be made from a Hatschek process. The composite materials may be further used as interior and exterior building products.
A low density additive comprising particles of a low density inorganic material having a porous structure with hydroxyl groups deposited on its surface to provide hydrophilic and reactive sites on the surface.
A method of making a low density additives, the method comprising the steps of:
A composite formulation incorporating a low density additive of particles of a low density inorganic material having a porous structure with hydroxyl groups deposited on its surface to provide hydrophilic and reactive sites on the surface, wherein the low density additive is in a quantity that lowers the density of the composite material to less than about 1900 kg/m3.
A composite formulation incorporating a low density additive of particles of a low density inorganic material having a porous structure with hydroxyl groups deposited on its surface to provide hydrophilic and reactive sites on the surface, wherein the low density additive is in a quantity that maintains moisture expansion of the composite material to a level below about 0.2%.
A composite formulation incorporating a low density additive of particles of a low density inorganic material having a porous structure with hydroxyl groups deposited on its surface to provide hydrophilic and reactive sites on the surface, wherein the low density additive is in a quantity that accelerates formation of the formulation.
Dependencies are inferred from the claim text.