Mixed alkoxysilyl functional polymers

• US 7,307,134 B2
• Filed: 02/22/2002
• Issued: 12/11/2007
• Est. Priority Date: 02/22/2002
• Status: Expired due to Term

• Current Assignee: Henkel AG & Co KGaA
• Original Assignee: Henkel Corporation (Henkel AG & Co KGaA), Henkel KGaA (Henkel AG & Co KGaA)
• Inventors: Bachon, Thomas, Klein, Johann, Lim, Thomas F., Beuer, Bernd
• Primary Examiner(s): Zimmer; Marc S.
• Application Number:
  US10/469,096
• Publication Number:
  US 20040116639A1
• Time in Patent Office: 2,118 Days
• Field of Search: 528/17, 528/18, 528/29, 528/34, 528/35
• US Class Current: 528/34
• CPC Class Codes: C08G 77/18 to alkoxy or aryloxy groups
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence
• CPC Class Codes: C08G 77/26 nitrogen-containing groups
• CPC Class Codes: C08G 77/70 Siloxanes defined by use of the MDTQ nomenclature
• CPC Class Codes: C08K 5/5419 containing at least one Si—C bond
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C09J 143/04 Homopolymers or copolymers of monomers containing silicon

Abstract

This invention relates to silylated polymers having mixed alkoxy groups on the silyl portion thereof, methods of their preparation, and compositions and reaction products formed therefrom. These alkoxysilylated polymers can be crosslinked when exposed to atmospheric moisture to become useful elastomers, sealants or adhesives. The presence of different alkoxy groups on the silicon atoms can control or otherwise moderate the cure speeds of these silylated polymers.

Claims

1. A method of making an alkoxysilyl endcapped polymer, comprising the steps of:

reacting a first reactant having the structure;

HO—

R—

OH

 

wherein R is a hydrocarbon diradical selected from the group consisting of polyesters, polyolefins, polyurethanes, poly(meth)acrylates and polyepoxide, any of which optionally includes heteroatom and/or silicone-containing linkages, and polysiloxanes, with a second reactant comprising a silyl having one end terminating with an isocyanate group and another end terminating with at least two alkoxy groups attached to a silicon atom thereof, wherein at least one of said alkoxy groups is not methoxy; and

providing for reaction as a third reactant a methoxy silane in amounts and for a time sufficient to achieve alkoxy exchange with said alkoxysilyl endcapped polymer wherein said alkoxysilyl endcapped polymer includes methoxy groups.