Aminopropyl-functional siloxane oligomers

US6395858B1 · kind B1 · utility

Assignee

• Degussa AG · DE

Inventors

• Helmut Mack · Ludwigshafen, DE
• Dieter Barfurth · Lohmar, DE
• Roland Edelmann · Wehr, DE
• Albert-Johannes Frings · Rheinfelden (Baden), DE
• Michael Horn · Rheinfelden (Baden), DE
• Peter Jenkner · Rheinfelden (Baden), DE
• Ralf Laven · Niederdossenbach, DE
• Jaroslaw Monkiewicz · Rheinfelden (Baden), DE
• Burkhard Standke · Soest, DE

Key dates

• Filing date: Oct 27, 1999
• Grant date: May 28, 2002
• Expiry date: Oct 27, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/26
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to mixtures of catenate and cyclic siloxane oligomers of the formulae I and II where the substituents R consist of (i) aminopropyl-functional groups of the formula &#8212;(CH2)3&#8212;NH2 or &#8212;(CH2)3&#8212;NHR&#8242; or &#8212;(CH2)3&#8212;NH(CH2)2&#8212;NH2 or &#8212;(CH2)3&#8212;NH(CH2)2&#8212;NH(CH2)2&#8212;NH2,in which R&#8242; is a linear, branched or cyclic alkyl group of 1 to 18 carbon atoms or an aryl group of 6 to 12 carbon atoms, and (ii) methoxy, ethoxy, 2-methoxyethoxy and/or propoxy groups, and (iii) if desired, alkyl, alkenyl, isoalkyl or cycloalkyl groups of 1 to 18 carbon atoms and/or aryl groups of 6 to 12 carbon atoms, and where not more than one aminopropyl-functional group is attached to one silicon atom and the degree of oligomerization of compounds of the formula I is within the range 2<m<30 and that of compounds of the formula II is 3&lE;n&lE;30 and the quotient of the molar proportion of Si/alkoxy group is &gE;0.5. The present invention also relates to a special process for preparing said mixtures and to their use.