Binder compositions and use thereof

A method of preparing a moisture resistant composite product comprising obtaining a thermoplastic dispersion produced by:

• heating a waste thermoplastic to produce a melted thermoplastic;
• subsequently dispersing the thermoplastic in water under agitation to produce
• a thermoplastic dispersion comprising thermoplastic particles;
• and
• wherein the thermoplastic is subjected to a treatment step;
• combining the thermoplastic dispersion with a cross-linker and a fibre to produce a composite mixture;
• and
• applying heat and pressure to the composite mixture;
• and
• wherein the moisture resistant composite product does not comprise a moisture resistance compound, other than the thermoplastic dispersion.

A composite board comprising:

• a) waste thermoplastic;
• b) lignocellulosic material;
• and
• c) a metal catalyst,
• wherein the lignocellulosic material comprises at least 75% of the composite board.