Husnu M. Kalkanoglu,Keith C. Hong,Joong Youn Kim,Ming Liang Shiao
申请号：
US14468974
公开号：
US09243409B2
申请日:
2014.08.26
申请国别(地区):
US
年份:
2016
代理人:
摘要：
Time-release algae-resistant roofing granules have a base particle including an algaecide and an outer coating layer including another algaecide. The at least two algaecides are released over different predetermined periods. The outer layer protects the base particle from exposure to the environment for a predetermined period, then fails catastrophically so that the interior algaecide can be released.
