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中国(2)
IPC部
B(2)
IPC大类
C09(2)
IPC小类
C09D(2)
IPC
C09D005/08(2)
发明人
LI S(2)
公开年
2021(2)
申请年
2021(2)
专利权人
Low-cost and environment-friendly preparation process of bisphenol S, comprises adding phenol into the reaction kettle, rotating, adding concentrated sulfuric acid with stirring, and reacting.
SUN H, LI S, YAO Z
Preparing Teflon corrugated pipe internal crimping joint comprises using 304 stainless steel processing to make withholding joints and coating crimping joint surface with corrosion-resistant modified polyperfluoroethylene propylene coating.
WANG W, WANG L, LI S
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