Method for producing nanoreinforced thermoplastic polymers
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United States of America Patent
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Issued Date -
Aug 7, 2003
app pub date -
Dec 13, 2002
filing date -
Jun 14, 2000
priority date (Note) -
Abandoned
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Abstract
This invention relates to the use of organophilic, swellable specially modified phyllosilicates in the production of nano-reinforced thermoplastic polymers, preferably polyamides, polyesters and polycarbonates. The inorganic phyllosilicate particles are bonded to or incorporated into the polymer in a covalent manner with nanodistribution. Special modification enables the phyllosilicates to be used as initiators in the case of polymerization or a chain elements in the case of condensation. The covalent bonding of the phyllosilicate particles to the polymer increases the stability of the reinforcing effect as opposed to an ionic bond. The special modification is performed for phyllosilicates which become hydrophobic as a result of cationic exchange. This property makes it possible for certain organic reaction partners to reach reactive groups present on the surface of the phyllosilicate and to react therewith on certain conditions. As a result of the functional groups containing organically modified phyllosilicats arising from the reaction, they are able to form stable, covalent bonds with the polymers.
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