C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 25/10 (2006.01) G02B 6/245 (2006.01) G02B 6/44 (2006.01) G02B 6/16 (1990.01)
Patent
CA 2132992
A coating system for individual glass fibers 12 of a lightwave communications system has improved strippability, particularly in situations where a group of such fibers are arrayed together in what is known as a ribbon 20. A preferred embodiment includes two layers (primary 14 and secondary 15) of polymeric materials surrounding the glass fiber 12. The primary layer 14 comprises an oligomer (50-80% by weight), a diluent (15-40% by weight), and additives (5-35% by weight). The oligomer comprises polyol "A," diisocyanate "B," and a hydroxy-terminated alkyl acrylate "C" having the structure C-BA-B-C. At least one of the additives contains a non-crosslinked hydrocarbon component (1-20% by weight) having a structure R1 - (R)n - R2; where R1, R2 comprises an alkyl group or an OH group, and R is acombination of C, H or C, H, O. In an alternative embodiment, the need for a diluent is substantially eliminated by using an oligomer having the structure E-D-E where "D" represents a carboxy-terminated polyol, and "E" represents a glycidyl acrylate.
Système de revêtement de fibres de verre individuelles 12 dans un système de communication à ondes lumineuses qui se caractérise par un dénudage amélioré, particulièrement dans les cas où un groupe de telles fibres sont réunies pour former ce qu'on appelle un ruban 20. Une application préférée comprend deux couches (primaire 14 et secondaire 15) de matière polymérique entourant la fibre de verre 12. La couche primaire 14 comprend un oligomère (50-80 % en poids), un diluant (15-40 % en poids) et des additifs (5-35 % en poids). L'oligomère comprend un polyol A, un diisocyanate B et un acrylate d'alkyle à terminaison hydroxy C de structure C-BA-B-C. Au moins un des additifs contient un constituant hydrocarboné non réticulé (1-20 % en poids) de structure R1 - (R)n - R2; où R1, R2 comprennent un groupe alkyle ou un groupe OH, et R est une combinaison de C, H ou C, H, O. Dans une autre application, le besoin d'un diluant est en grande partie éliminé par l'utilisation d'un oligomère de structure E-D-E où D représente un polyol à terminaison carboxy, et E représente un acrylate de glycidyle.
Parker Theodore Lance
Petisce James Raymond
Shepherd Lloyd
Taylor Carl Raymond
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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