发明授权
- 专利标题: Blended fluoropolymer compositions
- 专利标题(中): 混合的含氟聚合物组合物
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申请号: US12468580申请日: 2009-05-19
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公开(公告)号: US08691344B2公开(公告)日: 2014-04-08
- 发明人: Leonard W. Harvey , Michael Coates , Julie K. Wright
- 申请人: Leonard W. Harvey , Michael Coates , Julie K. Wright
- 申请人地址: US PA Elverson
- 专利权人: Whitford Corporation
- 当前专利权人: Whitford Corporation
- 当前专利权人地址: US PA Elverson
- 代理机构: Faegre Baker Daniels LLP
- 主分类号: B05D3/02
- IPC分类号: B05D3/02
摘要:
Blended fluoropolymer compositions are provided. In one embodiment, a liquid dispersion of a first fluoropolymer is blended with a liquid dispersion of a second fluoropolymer. The first fluoropolymer may be polytetrafluoroethylene (PTFE), such as a low molecular weight PTFE (LPTFE) that has been polymerized via a dispersion or emulsion polymerization process, and which has not been agglomerated, irradiated, or thermally degraded. The LPTFE may be in the form of an aqueous dispersion, having a mean particle size of less than 1.0 microns (μm), with the LPTFE having a first melt temperature (Tm) of 332° C. or less. The second fluoropolymer may be a melt processible fluoropolymer (MPF), such as methylfluoroalkoxy (MFA), fluorinated ethylene propylene (FEP), or perfluoroalkoxy (PFA), for example, in the form of an aqueous dispersion, and having a mean particle size of less than 1.0 microns (μm). Blending of the dispersions facilitates interaction of the LPTFE and MPF on a submicron level to facilitate intimate blending such that, when the blended fluoropolymer composition is dried, a crystal structure representing a true alloy of the fluoropolymers is formed, having melt characteristics that differ from those of the individual fluoropolymers. The blended fluoropolymer composition may be used to provide a coating having improved impermeability, stain resistance, abrasion resistance, smoothness, and higher contact angles.
公开/授权文献
- US20090317553A1 BLENDED FLUOROPOLYMER COMPOSITIONS 公开/授权日:2009-12-24
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