Patent · US Expired

Polylauryllactam low in fisheye gel content

US3951909A · kind A · utility

1Cited by

3References

7Claims

0Family size

Assignee

Chemische Werke Huels Aktiengesellschaft · US

Inventors

Rainer Feldmann · Marl, DE
Roland Feinauer

Key dates

Filing date	Oct 29, 1974
Grant date	Apr 20, 1976
Priority date	—
Expiry date	Oct 29, 1994

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G69/16
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polylauryllactam low in fisheye gel content polymerized at temperatures ranging from about 260.degree. to 340.degree.C and in the presence of water and possibly in the presence of monocarboxylic acids having 2-18 carbon atoms or polycarboxylic acids having 2-12 carbon atoms as chain regulators, under pressure and with removal of the water, and possibly with post-condensation at temperatures ranging from about 200.degree. to 300.degree.C, wherein 2-hydroxyphenylbenzoxazole is added to the molten, lauryllactam monomer in such amounts that the polylauryllactam contains from about 0.05 to 1.5 percent by weight of 2-hydroxyphenylbenzoxazole.

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