Patent · US Expired

Ionically cross-linked siloxane polymers

US4523002A · kind A · utility

21Cited by
0References
7Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 4, 1984
Grant dateJun 11, 1985
Priority date
Expiry dateJan 4, 2004

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S528/901
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

Zwitterionic siloxane polymers containing tertiary silicone atoms with zwitterions and their aminoalkyl siloxane polymer intermediates production are provided. Methods of their production are also provided. The aminoalkyl siloxane polymer intermediates and the zwitterionic siloxane polymers are obtained by co-polymerizing trifunctional aminoalkyl silanes or zwitterionic silanes, respectively, with hydroxy-terminated siloxane oligomers in the presence of an acid catalyst. The aminoalkyl siloxane polymer intermediates are converted to zwitterionic siloxane polymer by reaction with an organosultone or an organolactone. Trifunctional aminoalkyl silanes are readily available and utilizing these silanes provides an economical route to obtaining zwitterionic siloxane polymers.

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