Flooding composition with polytetrafluoroethyene

Patent metadata

Field	Value
Publication number	US-11339282-B2
Application number	US-201817259267-A
Country	US
Kind code	B2
Filing date	Jul 11, 2018
Priority date	Jul 11, 2018
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

Provided is a flooding composition. The flooding composition includes in weight percent (wt %) based on the weight of the composition: (A) from 1 wt % to less than 5 wt % of a polytetrafluoroethylene (PTFE) powder; (B) a styrene-ethylene/propylene block copolymer; and (C) a mineral oil having a kinematic viscosity from 32 cSt to 100 cSt at 40° C. Also a fiber optic cable is provided. The fiber optic cable includes a buffer tube; at least one optical fiber in the buffer tube; and the flooding composition.

First claim

We claim:

1. A flooding composition comprising in weight percent (wt %) based on the weight of the composition:
(A) from 1 wt % to less than 5 wt % of a polytetrafluoroethylene (PTFE) powder;
(B) a styrene-ethylene/propylene block copolymer; and
(C) a mineral oil having a kinematic viscosity from 32 cSt to 100 cSt at 40° C.

2. The flooding composition of claim 1 comprising:
(A) from 1 wt % to less than 5 wt % PTFE powder;
(B) from 5 wt % to 9 wt % styrene-ethylene/propylene block copolymer; and
(C) from 70 wt % to 90 wt % mineral oil.

3. The flooding composition of claim 2 , wherein the flooding composition has a drop point from 195° C. to 300° C.

4. The flooding composition of claim 2 , wherein the flooding composition has a dynamic viscosity at 200/s from 1.5 Pa·s to less than 7.0 Pa·s.

5. The flooding composition of claim 4 , wherein the flooding composition has a dynamic viscosity at 6/s from 14 Pa·s to 30 Pa·s.

6. The flooding composition of claim 2 , wherein the flooding composition has
(i) a drop point from 195° C. to 300° C.;
(ii) a dynamic viscosity at 6/s from 14 Pa·s to 30 Pa·s; and
(iii) a dynamic viscosity at 200/s from 1.5 Pa·s to less than 7.0 Pa·s.

7. The flooding composition of claim 1 , wherein the PTFE powder has an average particle size from 0.01 μm to 800 μm.

8. A fiber optic cable comprising:
a buffer tube;
at least one optical fiber in the buffer tube; and
the flooding composition of claim 1 .

9. The fiber optic cable of claim 8 wherein the flooding composition has a drop point from 195° C. to 300° C. and a dynamic viscosity at 200/s from 1.5 Pa·s to less than 7.0 Pa·s.

10. The fiber optic cable of claim 9 wherein the PTFE powder has an average particle size from 0.01 μm to 800 μm.

Assignees

• Dow Global Technologies Llc

Inventors

• Sun Gangwei
• Gao Peng
• Esseghir Mohamed

Classifications

• C08L53/00 Primary

  Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers · CPC title

• C08L53/025 Primary

  modified · CPC title

• H02G15/20

  Cable fittings for cables filled with or surrounded by gas or oil (H02G15/34 takes precedence) · CPC title

• C08L91/00

  Compositions of oils, fats or waxes; Compositions of derivatives thereof · CPC title

• H02G15/00

  Cable fittings · CPC title