Ambient-curable resin formulations
AssigneeSouthwire Company
InventorsMohamadou Aminou, James Patrick
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Abstract
Disclosed herein are ambient curable resin formulations comprising moisture scavenging, non-grafting silanes that improve the processability of the resin. Cable manufacturing methods comprising extrusion of the resin formulations are also disclosed herein, as advantageously allowing acceptable levels of cross-linking without requirement of conventional vulcanization and moisture cure processes. Resulting cables having a jacket with a reduced amount of scorch, and acceptably cross-linked jacket are also disclosed.
Claims19
A crosslinkable, fire retardant formulation comprising:
- a polymer component comprising a silane graftable polymer, a silane grafted polymer, or both;
- from 30 wt. % to 70 wt. % of a fire retardant;
- from 0.5 wt. % to 5 wt. % of a non-grafting silane, the non-grafting silane comprising a hydrolyzable substituent and an unreactive substituent;
- and
- an ambient-cure catalyst;
- wherein a total amount of hydrolyzable substituents of the non-grafting silane is in a range from 0.12 to 0.25 mmol per gram of the fire retardant formulation, and wherein a total amount of hydrolysable substituents of the non-grafting silane is in a range from 0.55 to 0.75 mmol per gram of the fire retardant.
A method for producing a crosslinked polymeric composition, the method comprising:
- grafting a silane to a polymer;
- compounding the polymer with:
- a fire retardant in an amount from 30 wt. % to 70 wt. %, based on the total weight of the cross-linked polymeric composition;
- a non-grafting silane comprising a hydrolyzable substituent, wherein a total amount of the hydrolyzable substituent is in a range from 0.12 to 0.25 mmol per gram of the cross-linked polymeric composition and wherein a total amount of hydrolysable substituents of the non-grafting silane is in a range from 0.55 to 0.75 mmol per gram of the fire retardant, the non-grafting silane further comprising an unreactive substituent;
- and
- an ambient-cure catalyst;
- extruding the polymeric resin onto an article;
- and
- curing the polymeric resin under ambient conditions.
Dependencies are inferred from the claim text.