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Decorative material having abrasion resistance

  • US 5,928,778 A
  • Filed: 08/29/1996
  • Issued: 07/27/1999
  • Est. Priority Date: 10/31/1994
  • Status: Expired due to Term
First Claim
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1. A decorative material comprising:

  • a substrate; and

    an abrasion-resistant coating layer formed on said substrate, said abrasion-resistant coating layer comprising spherical inorganic particles (A) having an average particle diameter of 3 to 50 micrometers and a Knoop hardness of at least 1,300 kg/mm2, and a binder (B) comprising a crosslinkable resin comprising at least 10% by weight of a polyether urethane (meth) acrylate represented by the following general formula (2);

    
    
    space="preserve" listing-type="equation">CH.sub.2 ═

    C(R.sup.1)--COOCH.sub.2 CH.sub.2 --OCONH--X--NHCOO-- --CH(R.sup.2)--(CH.sub.2).sub.n --O--!.sub.m --CONH--X--NHCOO--CH.sub.2 CH.sub.2 OCOC(R.sup.1)═

    CH.sub.2(

         2)wherein R1 and R2 each represent hydrogen or a methyl group, X is a diisocyanate radical, n is an integer of 1 to 3, and m is an integer of 6 to 60, the average molecular weight of crosslinked molecules of said binder (B) after curing being from 200 to 800, the amount of said spherical particles (A) being from 5% to 50% by weight of the total amount of the components (A) and (B), the hardness of said spherical particles (A) being higher than that of said binder (B), the average particle diameter d, in micrometers, of said spherical particles (A) fulfilling the following inequality (1);

    
    
    space="preserve" listing-type="equation">0.3t≦

    d≦

    3.0t (1)wherein t is an average thickness, in micrometers, of said coating layer.

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