Patent · US Expired

Filler-containing acrylic and modacrylic fibres and a process for the production thereof

US4643946A · kind A · utility

3Cited by

8References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Wolfgang Brauer · Leverkusen, DE
Bernd Willenberg · Bensberg, DE
Siegfried Korte · Odenthal, DE
Carlhans Suling · Odenthal, DE

Key dates

Filing date	Nov 12, 1985
Grant date	Feb 17, 1987
Priority date	—
Expiry date	Nov 12, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31663
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Silica-containing acrylic and modacrylic fibres are obtained without spinning defects in that an aqueous silica sol is reacted with a silane and with a polar organic solvent, the sequence in which the two agents are added being optional, the water is distilled off in a vacuum at a temperature of at most 60.degree. C., the thread-forming polymer is then added in a quantity which is sufficient to form a spinnable solution and the solution is spun.

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