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US-10178369-B2 · Jan 8, 2019 · US
Filling composition for optical fiber cables
US11466155B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11466155-B2 |
| Application number | US-201716624556-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 30, 2017 |
| Priority date | Jun 30, 2017 |
| Publication date | Oct 11, 2022 |
| Grant date | Oct 11, 2022 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A filling composition comprises (A) a mineral oil having a kinematic viscosity from 80 cSt to 100 cSt at 40° C.; (B) a styrene-ethylene/propylene diblock copolymer; and (C1) a propylene/ethylene copolymer having a weight average molecular weight (M w ) from 5,000 to 200,000 or (C2) an ethylene/propylene copolymer having a weight average molecular weight (M w ) from 5,000 to 200,000. The filling composition is used as a filling composition in a buffer tube.
First claim
Opening claim text (preview).
The invention claimed is: 1. A filling composition comprising: (A) from 70 wt % to 90 wt. % of a mineral oil having a kinematic viscosity from 80 cSt to 100 cSt at 40° C.; (B) from 5 wt % to 15 wt % of a styrene-ethylene/propylene diblock copolymer; and (C) from 1 wt % to 20 wt % of a propylene/ethylene copolymer having a weight average molecular weight (Mw) from 10,000 to 50,000, wherein the filling composition has a drop point from 200° C. to 300° C. 2. The filling composition of claim 1 having a shear viscosity at 6 s −1 from 50 Pa·s to 150 Pa·s at 25° C. 3. The filling composition of claim 2 having a shear thinning index from 8 to 3000 at 25° C. 4. A buffer tube comprising: the filling composition of claim 1 in contact with a surface of the buffer tube. 5. The buffer tube of claim 4 having a 1% secant modulus from 700 MPa to 1,000 MPa as measured according to ASTM D638. 6. The buffer tube of claim 5 having an automatic Young's modulus from 800 MPa to 1,500 MPa as measured according to ASTM D638. 7. The buffer tube of claim 6 having a tensile stress at yield from 27 to 31 MPa as measured according to ASTM D638. 8. A filling composition comprising: (A) 70 wt % to 90 wt % of a mineral oil having a kinematic viscosity from 80 cSt to 100 cSt at 40° C.; (B) 5 wt % to 15 wt % of a styrene-ethylene/propylene diblock copolymer; and (C) 1 wt % to 20 wt % of an ethylene/propylene copolymer having a weight average molecular weight (Mw) from 10,000 to 30,000, wherein the filling composition has a drop point from 200° C. 9. A buffer tube comprising: the filling composition of claim 8 in contact with a surface of the buffer tube.
Assignees
Inventors
Classifications
- H01B7/285Primary
by completely or partially filling interstices in the cable · CPC title
Liquid component is processing oil · CPC title
Injection or filling devices · CPC title
- C08L91/00Primary
Compositions of oils, fats or waxes; Compositions of derivatives thereof · CPC title
built up from sub-bundles (G02B6/4429, G02B6/4439, G02B6/4479 take precedence) · CPC title
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Frequently asked questions
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- What does patent US11466155B2 cover?
- A filling composition comprises (A) a mineral oil having a kinematic viscosity from 80 cSt to 100 cSt at 40° C.; (B) a styrene-ethylene/propylene diblock copolymer; and (C1) a propylene/ethylene copolymer having a weight average molecular weight (M w ) from 5,000 to 200,000 or (C2) an ethylene/propylene copolymer having a weight average molecular weight (M w ) from 5,000 to 200,000. The filling…
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification H01B7/285. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 11 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).