Patent · US Expired

Permanent hydrophobic and oleophotic modification for polymer surfaces and process of making same

US5856246A · kind A · utility

9Cited by

6References

3Claims

0Family size

Inventors

Richard Witzko · Günzburg, DE
Wolfgang Burger · Burgrain, DE
Gudrun Petzold · Dresden, DE
Klaus Lunkwitz · Dresden, DE
Heide-Marie Buchhammer · Dresden, DE

Key dates

Filing date	Mar 26, 1997
Grant date	Jan 5, 1999
Priority date	—
Expiry date	Mar 26, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/227
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention concerns a thin film of a permanent hydrophobic and optionally oleophobic finish for polymer surfaces. The film is formed from at least one layer of a water-soluble polycation and cationic synthetic resin. For further improvement of the oleophobic and permanent hydrophobic properties the film can additionally contain a long-chain surfactant or an alkyl-substituted polyanion.

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