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Hybrid polymer coating for petrous or ceramic substrates, petrous or ceramic substrate, and obtaining method

  • US 10,640,675 B2
  • Filed: 11/21/2016
  • Issued: 05/05/2020
  • Est. Priority Date: 07/18/2011
  • Status: Active Grant
First Claim
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1. A hybrid polymer coating for petrous or ceramic substrates providing a surface layer with a thickness comprised between 0.1 and 1 mm or between 0.1 and 0.7 mm, that is directly applied on a substrate by an applicator with retention of said coating until a complete curing thereof remaining adhered firmly to said substrates, wherein said coating is prepared from a mixture with the following composition:

  • 10-25% by weight of micronized powder functioning as a cement with inorganic loads of petrographic origin;

    40-60% by weight of inorganic gravels of petrographic origin comprising quartz, silica or silica sand, glass, recycled mirrors, or silicon with a grain size comprised in the range of 0.063-0.6 mm;

    10-40% by weight of a polymerizable base resin selected from polyurethane, polyester, epoxy or acrylic, andapproximately 5% by weight of pigments and other additives for said resin including a catalyst;

    wherein said inorganic gravels and micronized powder form a concentration gradient in the coating, so that in three areas of said applied coating having the same thickness the proportion of said gravel and micronized powder with respect to the thickness of the coating is the following;

    in a lower third of the coating corresponding to the first inner most area at the interphase between the coating and the surface of the petrous or ceramic substrate said gravel and micronized powder are in the range between 55%-90% by weight;

    in a middle third of the coating said gravel and micronized powder are in the range between 16%-60% by weight; and

    in an upper third of the coating close to the visible surface of the coating said gravel and micronized powder are in the range between 1%-15% by weight, andwherein the hybrid polymer coating enabling the use of defective or damaged slabs of marble agglomerate or substrates of a minimum thickness of 4-6 mm by applying the mentioned coating.

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