Method for preparing a transparent polymer material including mineral nanoparticles with a shape factor strictly higher than 1.0
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United States of America Patent
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Oct 2, 2012
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app pub date -
Nov 27, 2009
filing date -
Dec 8, 2008
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Abstract
The present invention provides a method of preparing a transparent polymer material, the method comprising steps i) and ii) in any order, the steps consisting in:
- i) mixing: mineral nanoparticles having a form factor strictly greater than 1.0; anda polymer matrix comprising a quantity of at least 80% by weight of a polycarbonate (PC) first thermoplastic polymer and of a second transparent thermoplastic polymer other than the first thermoplastic polymer, in order to obtain a mixture; and ii) heating the polymer matrix to the molten state, on its own or in the mixture;to obtain the transparent, polymer material, the mixture of step i) comprising a quantity of mineral nanoparticles having a form factor strictly greater than 1.0 that is strictly less than 5% by weight.
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