Patents Assigned to De Groot Automotives, B.V.
  • Patent number: 5037690
    Abstract: The invention provides a novel shaped product comprising a sheet material of polyurethane resin material reinforced with binder-free natural-fibre material, such as jute, flax, hemp, coir, ampas, ramie or cotton, possibly combined with polypropylene, polyethylene and/or glass fibres. A preferred fibre material is jute, preferably in the form of jute needled felt. The invention also provides a process for making the product. In the process, a binder-free mat of natural-fibre material having a water content of at least 4% which is impregnated with a known per se mixture thermosettable to form a polyurethane material, comprising a polyether-polyol component and an isocyanate component, followed by maintaining the temperature of the mixture at 20.degree.-50.degree. C., and setting the impregnated fibrous mat in a closed mold at a pressure of 3.5-20 kg/cm.sup.2 and a temperature of 20.degree.-75.degree. C.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: August 6, 1991
    Assignee: De Groot Automotives, B.V.
    Inventor: Ijede van der Kooy