Patent · US Expired

Radiation-curable optical fiber coatings having reduced yellowing and fast cure speed

US6187835A · kind A · utility

34Cited by

13References

17Claims

0Family size

Assignee

DSM N.V. · NL

Inventors

David M. Szum · Marengo, US
Chander Chawla · Batavia, US
Timothy E. Bishop · Algonquin, US

Key dates

Filing date	Jun 18, 1998
Grant date	Feb 13, 2001
Priority date	—
Expiry date	Jun 18, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31645
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Radiation-curable inner and outer primary optical fiber coatings are disclosed having both fast cure speed and reduced rates of yellowing. The compositions comprise particular photoinitiators and UV absorbers which are used in amounts to provide the combination of properties. The UV absorber can have ethylenic unsaturation. Outer primary coatings can be formulated to screen inner primary coatings and have fast cure speed.

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