Thermoplastic elastomer compositions are described comprising multigraft copolymers. The multigraft copolymers can comprise a rubbery polymeric backbone and a plurality of glassy polymeric side chains, each attached at one of a plurality of branch points randomly spaced along the backbone. The copolymer materials have high tensile strength, high strain at break, and low residual strain after elongation. The compositions can be used as adhesives and in a wide variety of high tech, medical, and commodity applications.

A building panel (1) including a water resistant core (5) including thermoplastic material 21 and a surface layer (4) including thermosetting resins. Also, production methods to form a board material (1) with a dry blend of thermoplastic particles 21a in powder form and fillers in powder form and to apply a surface layer (4) with a hot-hot lamination process to a core (5) including such board material.

Two-component adhesion composition suitable for extrusion coating paper substrates which comprises: a) from 70 to 98 wt % of high melt strength polypropylene (A) with a branching index g of 0.9 or less; and b) from 2 to 30 wt % of a component (B) selected from the group consisting of: (i) maleic anhydride-modified polypropylene (MAPP); (ii) maleic anhydride-modified polypropylene wax; (iii) polypropylene homopolymer with high melt flow rate; or (iv) ethylene-vinyl acetate-based hot melt adhesive,
and its use.

A building panel (1) including a water resistant core (5) including thermoplastic material 21 and a surface layer (4) including thermosetting resins. Also, production methods to form a board material (1) with a dry blend of thermoplastic particles 21a in powder form and fillers in powder form and to apply a surface layer (4) with a hot-hot lamination process to a core (5) including such board material.