Patent · US Expired

Production of thin films

US5035762A · kind A · utility

4Cited by

4References

13Claims

0Family size

Assignee

BASF SE

Inventors

Gerhard Wegner · Mainz, DE
Arend Jan Schouten · Peize, NL
Gisela Duda · Dietzenbach, DE
Thomas Arndt · Bad König, DE

Key dates

Filing date	Jul 22, 1988
Grant date	Jul 30, 1991
Priority date	—
Expiry date	Jul 22, 2008

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB82Y40/00
WIPO fieldMicro-structural and nano-technology
WIPO sectorChemistry

Abstract

Thin films are produced by a process in which organic polymers having long-chain side groups are dissolved in an organic solvent, the solution is spread at the water/air interface by the Langmuir-Blodgett technique and the film is transferred onto a solid base material after evaporation of the organic solvent, and the organic polymers used are those which contain long-chain n-alkyl side groups bonded to the main chain of the polymer via polar groups, and some of these long-chain n-alkyl side groups are replaced by shorter-chain n-alkyl side groups, by branched alkyl side groups having the same or a smaller number of carbon atoms or by equally long or shorter side groups having one or more C-C multiple bonds. This process can be used to produce film elements, for example for optical filters.

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