Patent ID: 6899839

Claim:
A method of manufacturing a building product from a mix including particulate material and a binder, characterized by the binder being a thermoplastic binder which binder is an asphaltenes-containing binder having a penetration of less than about 15 dmm, comprising: heating the mix including the thermoplastic binder at least to a temperature at which the thermoplastic binder in the mix liquefies; subjecting the heated thermoplastic mix to a pressing action that shapes the heated mix; and cooling the shaped heated thermoplastic mix to solidify the thermoplastic binder and form the building product; wherein the heated thermoplastic mix flows into at least one mould cavity defined by an outer mould frame and in that the outer frame is warmed to prevent solidification of thermoplastic mix adjacent to the outer mould frame; and further wherein the outer mould frame defines together with dividers an array of mould cavities and in that the dividers are cooled to prevent sticking of thermoplastic mix adjacent to the dividers.