Addition cross-linked epoxy functional organo-siloxanes polymer and coating composition


Application Number: 00109421
Application Date: 2000.06.23
Publication Number: 1279250
Publication Date: 2001.01.10
Priority Information: 1999/6/24 US 09/339,141
International: C08G77/14;C09D183/14
Applicant(s) Name: Wacker-chemie GmbH
Address:
Inventor(s) Name: J. D. Gerling
Patent Agency Code: 72002
Patent Agent: gan ling
Abstract The present invention relates to an epoxy-functional organopolysiloxane resin, which is prepared by reaction of polysiloxane resin and silane each with an epoxy group. The epoxy-functional organopolysiloxane resin has repeating units with the formulae: EaRb1Rc2SiO1/2 (M unit), EaRb1Rc2SiO2/2 (D unit), EaRb1Rc2SiO3/2 (T unit), SiO4/2 (Q unit); wherein E is epoxy-functional C1-18 alkyl with one or more oxygen atoms if there is no oxygen atom coupled with silicon atom; each molecule contains at least two E groups on average; and R1 and R2 are C1-20 alkyl. The invention also relates to epoxy-functional organopolysiloxane coating composition containing the epoxy-functional organopolysiloxane resin and hardening agent. The coating composition solidifies by crosslinking action of epoxy group, and the solidified coating has resistance of weather, causticity and thermal.