Flooding Composition with Polysiloxane

Abstract

The present disclosure provides a flooding composition. In an embodiment, the flooding composition includes in weight percent (wt %) based on the weight of the composition (A) from 10 wt % to 45 wt % of a silane-grafted polyolefin (Si-g-PO). The flooding composition also includes (B) from 5 wt % to 60 wt % of a polyα-olefin oil (PAO oil), (C) from 15 wt % to 90 wt % of a polysiloxane, and (D) from 0.05 wt % to 0.2 wt % of a catalyst.

What is claimed is: 
     
         1 . A flooding composition comprising in weight percent (wt %) based on the weight of the composition:
 (A) from 10 wt % to 45 wt % of a silane-grafted polyolefin (Si-g-PO);   (B) from 5 wt % to 60 wt % of a polyα-olefin oil (PAO oil);   (C) from 15 wt % to 90 wt % of a polysiloxane; and   (D) from 0.05 wt % to 0.2 wt % of a catalyst.   
     
     
         2 . The flooding composition of  claim 1  wherein the Si-g-PO comprises two base polyolefins of an ethylene-based polymer and a propylene-based polymer. 
     
     
         3 . The flooding composition of  claim 2  wherein the Si-g-PO comprises a first amorphous polyolefin (APO) that is an APO ethylene-based polymer and a second APO that is an APO propylene-based polymer. 
     
     
         4 . The flooding composition of  claim 3  wherein the weight ratio of the first APO ethylene-based polymer to the second APO propylene-based polymer is from 3:1 to 1:3 based on total weight of the Si-g-PO. 
     
     
         5 . The flooding composition of  claim 1  wherein the polysiloxane is selected from the group consisting of polydimethylsiloxane (PDMS), hydroxyl-terminated polydimethylsiloxane (PDMS-OH), and combinations thereof. 
     
     
         6 . The flooding composition of  claim 1  wherein the flooding composition has an apparent viscosity from 30 cP to 1,800 cP at 150° C., as measured in accordance with ASTM D3236. 
     
     
         7 . The flooding composition of  claim 6  having a drop point greater than or equal to 80° C., as measured in accordance with ASTM D127. 
     
     
         8 . The flooding composition of  claim 7  comprising
 (A) from 25 wt % to 40 wt % of the Si-g-PO; 
 (B) from 30 wt % to 40 wt % of the PAO oil; 
 (Ci) from 20 wt % to 30 wt % of a PDMS; 
 (Cii) from 5 wt % to 10 wt % of a PDMS-OH; and 
 (D) from 0.1 wt % to 0.2 wt % of the catalyst 
 wherein the flooding composition has an apparent viscosity from 250 cP to 1,500 cP. 
 
     
     
         9 . The flooding composition of  claim 8  wherein the flooding composition has a drop point from greater than or equal to 80° C. to 150° C.; and
 has no oil separation when aged for 24 hours at 21° C. as measured in accordance with ASTM D1742. 
 
     
     
         10 . The flooding composition of  claim 7  comprising
 (A) from 35 wt % to 45 wt % of the Si-g-PO; 
 (B) from 50 wt % to 60 wt % of the PAO oil; 
 (C) from 5 wt % to 10 wt % of a hydroxyl-terminated polydimethyl siloxane; and 
 (D) from 0.1 wt % to 0.2 wt % of the catalyst wherein the flooding composition has an apparent viscosity from 250 cP to 300 cP. 
 
     
     
         11 . The flooding composition of  claim 10  wherein the flooding composition
 has a drop point from 120° C. to 150° C.; and 
 has no oil separation when aged for 24 hours at 21° C. as measured in accordance with ASTM D1742. 
 
     
     
         12 . The flooding composition of  claim 7  comprising
 (A) from 5 wt % to 15 wt % of the Si-g-PO; 
 (B) from 5 wt % to 20 wt % of the PAO; 
 (C) from 65 wt % to 85 wt % of a PDMS-OH; and 
 (D) from 0.1 wt % to 0.2 wt % of the catalyst 
 wherein the flooding composition has an apparent viscosity from 40 cP to 800 cP. 
 
     
     
         13 . The flooding composition of  claim 12  wherein the flooding composition
 has a drop point from 110° C. to 190° C.; and 
 has no oil separation when aged for 24 hours at 21° C. as measured in accordance with ASTM D1742. 
 
     
     
         14 . An fiber optic cable comprising:
 a buffer tube;   at least one optical fiber in the buffer tube; and   a flooding composition comprising in weight percent (wt %) based on the weight of the composition:   (A) from 10 wt % to 40 wt % of a silane-grafted polyolefin (Si-g-PO);   (B) from 5 wt % to 60 wt % of a polyα-olefin oil (PAO oil);   (C) from 15 wt % to 90 wt % of a polysiloxane; and   (D) from 0.05 wt % to 0.2 wt % of a catalyst.