POLYMERISABLE COMPOSITION COMPRISING TEMPO COMPOUND
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United States of America Patent
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Issued Date -
May 7, 2020
app pub date -
Jun 18, 2018
filing date -
Jun 19, 2017
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Abstract
A polymerisable composition suitable for impregnating a permeable material, a process for the treatment of a permeable material, especially wood and an impregnated material is described. The composition includes at least 60% w/w composition of one or more polymerisable monomer(s) and an initiator effective to bulk polymerise the polymerisable monomers above 50° C. The composition includes up to 0.5% w/w tempo compound effective to stabilise the composition at temperatures less than 50° C. or below its thermally activated polymerisation temperature and to not substantially prevent polymerisation above the polymerisation temperature. The process has steps of locating the permeable material in a chamber; evacuating the chamber; adding a thermally initiatable bulk polymerisable composition to the chamber; allowing the material to become impregnated with polymerisable composition; removing excess polymerisable composition; and effecting bulk polymerisation of the composition by increasing the temperature of the impregnated material in the chamber to initiate polymerisation of the composition.
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