Polytetrafluoroethylene aqueous dispersion, and polytetrafluoroethylene fine powder

摘要

The present invention aims to provide a polytetrafluoroethylene aqueous dispersion which contains significantly minute polytetrafluoroethylene particles and which is excellent in dispersion stability, and a significantly minute polytetrafluoroethylene fine powder. The polytetrafluoroethylene aqueous dispersion contains polytetrafluoroethylene particles including a tetrafluoroethylene unit alone or a tetrafluoroethylene unit and a modifying monomer unit derived from a modifying monomer copolymerizable with the tetrafluoroethylene unit. The polytetrafluoroethylene particles have a volume average particle size of not smaller than 0.1 nm but smaller than 20 nm.

主权项

1. A polytetrafluoroethylene aqueous dispersion comprising
polytetrafluoroethylene particles consisting of a tetrafluoroethylene unit or comprising a tetrafluoroethylene unit and 0.001 to 2 mol % of a modifying monomer unit derived from a modifying monomer copolymerizable with the tetrafluoroethylene, the polytetrafluoroethylene particles having a volume average particle size of not smaller than 0.1 nm but smaller than 20 nm and an equivalent weight of not less than 6,000.