Invention Grant
- Patent Title: Algae resistant roofing granules with controlled algaecide leaching rates, algae resistant shingles, and process for producing same
- Patent Title (中): 具有控制除藻剂浸出率，耐藻花叶片的藻类抗性屋顶颗粒及其生产方法
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Application No.: US10600847Application Date: 2003-06-20
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Publication No.: US07687106B2Publication Date: 2010-03-30
- Inventor: Keith C. Hong , Husnu M. Kalkanoglu , Ming L. Shiao
- Applicant: Keith C. Hong , Husnu M. Kalkanoglu , Ming L. Shiao
- Applicant Address: US PA Valley Forge
- Assignee: CertainTeed Corporation
- Current Assignee: CertainTeed Corporation
- Current Assignee Address: US PA Valley Forge
- Agency: Paul & Paul
- Main IPC: B05D7/00
- IPC: B05D7/00 ; B05D1/24
Abstract:
Algae-resistant roofing granules are formed by coating mineral particles with a clay-silicate binder including a metal oxide algaecide and small organic particles. When the particles are heated to cure the binder, the organic particles pyrolyse to form pores in the coating. Release of the algaecide is controlled by the structure of the granules.
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