Patent · US Active

Polysiloxane-modified polyisocyanates, processes for preparing the same, and polyurethanes containing the same

US8278399B2 · kind B2 · utility

0Cited by

3References

8Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Arno Nennemann · Bensberg, DE
Markus Mechtel · Neunburg vorm Wald, DE
Thomas Klimmasch · Leverkusen, DE
Meike Niesten

Key dates

Filing date	Nov 10, 2008
Grant date	Oct 2, 2012
Priority date	—
Expiry date	Jul 18, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/792
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Processes for preparing siloxane-modified polyisocyanates, the processes comprising: providing a polyisocyanate reactant; and reacting the polyisocyanate reactant with a hydroxyl-containing siloxane having a number-average molecular weight of 200 to 3000 g/mol and an average OH functionality of greater than or equal to 1.8, and corresponding to the general formula (I):wherein X represents an aliphatic, unbranched or branched C1 to C20 radical optionally containing ether groups; R represents a hydroxyl-functional radical; R1 represents a hydrogen or an optionally heteroatom-containing C1 to C20 hydrocarbon radical; and n is 1 to 40; siloxane-modified polyisocyanates prepared thereby, and uses therefor.

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