Patent · US Active

Silicone resin coating for electronic components

US7666969B2 · kind B2 · utility

2Cited by

2References

11Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Georg Loessel · Emmerting, DE
Manfred Meisenberger · Burghausen, DE
Gerhard Staiger · Frankenthal (Pfalz), DE

Key dates

Filing date	May 10, 2007
Grant date	Feb 23, 2010
Priority date	—
Expiry date	Jul 25, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D183/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

One-component, H-siloxane-containing addition-crosslinkable silicone resins, are prepared by charging a reactor with water and a solvent mixture of at least one aromatic solvent and at least one alkyl ester, adding a chlorosilane mixture containing an Si—H functional silane and a silane bearing an unsaturated hydrosilylatable group with stirring, the temperature not being above 50° C., separating an aqueous phase comprising a one-component, H-siloxane-containing addition-crosslinkable silicone resin, and washing the phase comprising the one-component, H-siloxane-containing addition-crosslinkable silicone resin in at least two washing steps to reduce residual HCl content, a final washing carried out using a 0.01%-1.0% strength aqueous solution of a base with a pH between 7.00-8.50, at a temperature of 20-50° C.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.