Patent · US Active

Process for the production of stable polymers

US8110704B2 · kind B2 · utility

1Cited by

10References

5Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

James-Michael Barnes · Breitscheid, DE
Hartmut Nefzger · Pulheim, DE
Erika Bauer · Höchst im Odenwald, DE
Stefan Penninger · Pulheim, DE
Thomas W. Schultz · Edina, US
Heinrich Lutz · Dirlewang, DE
Horst Di Mews · Leverkusen, DE
Charles S. Gracik · McMechen, US

Key dates

Filing date	Nov 2, 2006
Grant date	Feb 7, 2012
Priority date	—
Expiry date	Oct 23, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/7678
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Stable NCO prepolymers are produced from polyisocyanates having a melting point greater than 70° C., preferably, naphthalene diisocyanate, having advantageous physical properties. An important feature of the process of the present invention is the rapid cooling of the prepolymer. The process of the present invention may be carried out on a continuous or batch basis. The prepolymers of the present invention are particularly suitable for the production of cast polyurethane elastomers.

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