Process for producing objects
AssigneeAkzo Nobel N.V.
InventorsKlas Elfving, Anna Kron, Peter Sjögren, Odd Bjerke
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Abstract
The invention concerns a process for preparation of light weight objects comprising calendering, extrusion, blow or injection moulding a resin of polypropylene, polystyrene, HD polyethylene or copolymers thereof and, admixed therein, thermally expandable microspheres including a thermoplastic polymer shell encapsulating a propellant, at a temperature sufficient to result in expansion of the microspheres, wherein said polymer shell is made of a homo- or co-polymer from ethylenically unsaturated monomers comprising more than 80 wt % of nitrile containing monomers. The invention further concerns light weight objects obtainable by the process.
Claims17
A process for preparation of light weight objects comprising calendering, extrusion, blow or injection moulding a resin of polypropylene, polystyrene, HD polyethylene or copolymers thereof and, admixed therein, thermally expandable microspheres including a thermoplastic polymer shell encapsulating a propellant, at a temperature sufficient to result in expansion of the microspheres, wherein said polymer shell is made of a homo- or co-polymer from ethylenically unsaturated monomers comprising more than 85 wt % of nitrile containing monomers.
A process for preparation of light weight objects comprising calendering, extrusion, blow or injection moulding a resin of polypropylene, polystyrene, HD polyethylene or copolymers thereof and, admixed therein, thermally expandable microspheres including a thermoplastic polymer shell encapsulating a propellant with a boiling point or boiling point range above 50° C., at a temperature sufficient to result in expansion of the microspheres, wherein said polymer shell is made of a homo- or co-polymer from ethylenically unsaturated monomers comprising more than 85 wt % of nitrile containing monomers.
A process for preparation of light weight objects comprising injection moulding a resin of polypropylene or a copolymer thereof and, admixed therein, thermally expandable microspheres including a thermoplastic polymer shell encapsulating a propellant with a boiling point or boiling point range above 50° C., at a temperature sufficient to result in expansion of the microspheres, wherein said polymer shell is made of a homo- or co-polymer from ethylenically unsaturated monomers comprising more than 85 wt % of nitrile containing monomers.
Dependencies are inferred from the claim text.