Process for making self-extinguishing, by means of red phosphorus, synthetic thermoplastic materials and products so obtained
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United States of America Patent
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Sep 11, 1984
Grant Date -
N/A
app pub date -
Feb 7, 1983
filing date -
Feb 9, 1982
priority date (Note) -
Expired
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Abstract
A process for making self-extinguishing thermoplastic materials based on synthetic polymeric substances by incorporation of red phosphorus into said materials, which comprises the following steps: forming a 'concentrate' consisting of 30-70% of a 'mother polymeric substance' and of 70-30% of red phosphorus powder previously encapsulated in a modified cationized melamine resin; incorporating said concentrate into a thermoplastic material to be made self-extinguishing and consisting of at least 50% of a polymeric substance similar to or consistent with the substance comprised in said concentrate, the amount of the above-mentioned concentrate being quantitatively so proportioned that the final self-extinguishing thermoplastic material contains 1-15% by weight of encapsulated red phosphorus.
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