Polymer jacket material blends with improved flame resistance

Patent metadata

Field	Value
Publication number	US-10689516-B2
Application number	US-201815952541-A
Country	US
Kind code	B2
Filing date	Apr 13, 2018
Priority date	Apr 20, 2017
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A fire-resistant material according to an example of the present disclosure includes a base material and at least one of a siloxane polymer and a phosphonate polymer. A method of making a fire-resistant material is also disclosed.

First claim

We claim:

1. A fire-resistant material, comprising:
a base material, a siloxane polymer, and a phosphonate polymer, wherein the siloxane polymer comprises between about 1% and 20% by weight of the fire-resistant material and the phosphonate polymer comprises between about 1% and about 20% by weight of the fire-resistant material.

2. The fire-resistant material of claim 1 , wherein the siloxane polymer comprises between about 5% and about 15% by weight of the fire-resistant material and the phosphonate polymer comprises between about 5% and about 15% by weight of the fire-resistant material.

3. The fire-resistant material of claim 1 , wherein the siloxane polymer comprises at least one of a polyimide siloxane copolymer, polyetherimide siloxane copolymer, polyetherimide sulfone siloxane copolymer, polyimide polysiloxane block copolymers, polyetherimide polysiloxane block copolymers, polyetherimide sulfone polysiloxane block copolymer, and copolymers and blends thereof.

4. The fire-resistant material of claim 1 , wherein the phosphonate polymer comprises at least one of poly-phosphonate homopolymer, phosphonate oligomer, phosphonate carbonate co-oligomer, poly-phosphonate-polycarbonate copolymer, phosphonate ester co-oligomer, and poly-phosphonate-polyester copolymer and blends thereof.

5. The fire-resistant material of claim 1 , wherein the base material is elastic.

6. The fire-resistant material of claim 1 , wherein the material is shaped into an elevator drive belt.

7. A belt, comprising:
at least one tension member; and
a jacket at least partially covering the at least one tension member, the jacket comprising a fire-resistant material including a base material, a siloxane polymer, and a phosphonate-based additive, wherein the siloxane polymer comprises between about 1% and about 20% by weight of the fire-resistant material and the phosphonate polymer comprises between about 1% and about 20% by weight of the fire-resistant material.

8. The belt of claim 7 , wherein the tension members comprise wound metallic cords and a polymer matrix composite surrounding the wound metallic cords, the polymer matrix composite including fibers in a matrix material.

9. The belt of claim 8 , wherein the fibers comprise at least one of carbon, glass, mineral, liquid crystal, and aramid fibers, and the matrix material comprises at least one of polyurethane, epoxy, bis-maleimide, phenolic, polyimide, polyester, and silicone matrix composites, or mixtures and blends thereof.

10. The belt of claim 7 , wherein the siloxane polymer comprises at least one of polyimide siloxane copolymer, polyetherimide siloxane copolymer, polyetherimide sulfone siloxane copolymer, polyimide polysiloxane block copolymers, polyetherimide polysiloxane block copolymers, and polyetherimide sulfone polysiloxane block copolymer, and copolymers and blends thereof, and the phosphonate polymer comprises at least one of poly-phosphonate homopolymer, phosphonate oligomer, phosphonate carbonate co-oligomer, poly-phosphonate-polycarbonate copolymer, phosphonate ester co-oligomer, and poly-phosphonate-polyester copolymer and blends thereof.

11. The belt of claim 7 , wherein the base material comprises at least one of a thermoplastic elastomer, a thermosetting elastomer, and a rubber polymer.

12. A method of making a fire-resistant article, comprising:
combining a base material with a siloxane polymer and a phosphonate polymer in extrusion equipment to form a mixture, wherein the siloxane polymer comprises between about 1% and about 20% by weight of the mixture and the phosphate polymer comprises between about 1% and about 20% by weight of the mixture; and
extruding the mixture to form a fire-resistant article.

13. The method of claim 12 , wherein the fire-resistant article comprises a jacket for a belt.

14. The method of claim 13 , further comprising the step of encasing at least one tension member in the jacket material.

15. The method of claim 12 , comprising providing the siloxane polymer material to the extrusion equipment in a finely ground form.

16. The method of claim 15 , comprising providing the siloxane polymer material to the extrusion equipment while the base material is in a molten form.

17. The fire-resistant material of claim 1 , wherein the base material includes at least one of an elastomer and a rubber polymer.

18. The belt of claim 7 , wherein the siloxane polymer comprises between about 5% and about 15% by weight of the fire-resistant material and the phosphonate polymer comprises between about 5% and about 15% by weight of the fire-resistant material.

19. The belt of claim 7 , wherein the base material includes at least one of an elastomer and a rubber polymer.

20. The method of claim 12 , wherein the siloxane polymer comprises between about 5% and about 15% by weight of the fire-resistant material and the phosphonate polymer comprises between about 5% and about 15% by weight of the fire-resistant material.

Assignees

• Otis Elevator Co

Inventors

• Papas Paul
• Zafiris Georgios S
• Guilani Brad

Classifications

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• F16G1/16

  with reinforcement bonded by the plastic material {(making thereof B32B)} · CPC title

• F16G1/12

  with metal reinforcement · CPC title

• B66B23/24

  Handrails (driving gear therefor B66B23/02; tensioning means therefor B66B23/16; preventing jamming thereof by foreign objects B66B29/04; accessories therefor B66B31/02) · CPC title

• C08L75/04 Primary

  Polyurethanes · CPC title