发明授权
- 专利标题: Microporous material exhibiting increased whiteness retention
- 专利标题(中): 表现出增加的白度保留的微孔材料
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申请号: US977351申请日: 1992-11-18
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公开(公告)号: US5326391A公开(公告)日: 1994-07-05
- 发明人: Barbara J. Anderson , Paul L. Benenati , Harlan B. Johnson , Thomas A. Rechlicz , William A. Williams
- 申请人: Barbara J. Anderson , Paul L. Benenati , Harlan B. Johnson , Thomas A. Rechlicz , William A. Williams
- 申请人地址: PA Pittsburgh
- 专利权人: PPG Industries, Inc.
- 当前专利权人: PPG Industries, Inc.
- 当前专利权人地址: PA Pittsburgh
- 主分类号: C08K9/04
- IPC分类号: C08K9/04 ; C08K7/22 ; C04B16/08
摘要:
The tendency of microporous material to discolor over a period of time when exposed to the atmosphere during normal usage can be reduced if the microporous material comprises whiteness retaining organic surface active agent.
公开/授权文献
- US5917326A Guidance system for a moving person 公开/授权日:1999-06-29
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