Patent · US Expired

Microcapsules with improved polyurea walls

US4847152A · kind A · utility

26Cited by

12References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Gert Jabs
Ulrich Nehen · Leverkusen, DE
Hans-Joachim Scholl · Cologne, DE

Key dates

Filing date	Oct 7, 1987
Grant date	Jul 11, 1989
Priority date	—
Expiry date	Oct 7, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2985
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Improved microcapsules contain at least one wall which is the reaction product of at least one isocyanate-reactive group and an aromatic isocyanate which has the formula: ##STR1## in which n=8 to 20. The microcapsules are useful in carbonless copy paper.

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