Polymeric nanocomposite
OwnerJawk Meijer, Elmar Wiejack-Symanninventors
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Abstract
The invention relates to a process for the preparation of a polymeric nanocomposite, comprising a polymer selected from the group comprising nylon, polyester and polyurethane, and comprising graphite. The process results in a nanocomposite, comprising 5-20 wt. % of graphite, said nanocomposite having both ESD- and FR-properties. The invention also deals with equipment, at least partially made of nanocomposite.
Claims20
Process for the preparation of a polymeric nanocomposite, comprising a polymer selected from the group consisting of nylon, polyester and polyurethane, and comprising graphite, this process comprising the following steps:
- a) mixing the liquid monomer(s) for the polymer, or a liquid oligomer thereof, with an intercalated graphite using a specific mixing energy of at most 1 KW/m3,
- b) degassing the resulting mixture for a period of at least 5 minutes under a pressure of at most 50 kPa,
- c) polymerizing said mixture, optionally in the presence of a suitable catalyst system, the process resulting in a polymeric nanocomposite comprising 5-20 wt. % of delaminated graphite, relative to the weight of the polymer.
Polymeric nanocomposite, comprising a polymer selected from the group consisting of nylon, polyester, and polyurethane, wherein said nanocomposite comprises 5-20 wt. % delaminated graphite relative to the weight of the polymer, and having a surface resistivity of between 5×105-1010 Ω/square (according to ASTM D257), and a flame-retardancy of at least UL 94 V1 (according to Underwriter Laboratory Test 94).
Dependencies are inferred from the claim text.