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US 11,536,400 B2Granted
Zero flow fireproof hose utilizing zinc borate and expandable graphite additives
AssigneeEaton Intelligent Power Limited
InventorsAaron David Clark, Tanul Singh
Life of this patent
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Abstract
A hose is provided capable of meeting fireproof requirements per AS1055 under no flow condition. The hose has multiple layers of fire protection comprising a silicone rubber layer impregnated with additives including zinc borate and expandable graphite.
Claims21
A fireproof hose having a multiplicity of layers comprising
- an outer thermal insulating layer prepared from a thermal insulating composition comprising a silicone, an expandable graphite, and a zinc borate, comprising a weight ratio of zinc borate to expandable graphite between from about 12:1 to about 2.5:1.
A fireproof hose comprising a multiplicity of layers from an inner to an outer radial direction comprising:
- i) an inner tube layer prepared from a composition comprising a PTFE;
- ii) a first reinforcing layer comprising a metallic braid;
- iii) a first thermal insulating layer;
- iv) a second reinforcing layer comprising a metallic braid;
- and
- v) a second thermal insulating layer prepared from a composition comprising a silicone base rubber, an expandable graphite, and a zinc borate, comprising a weight ratio of zinc borate to expandable graphite between from about 12:1 to about 2.5:1.
3 more elements
A method of making a fireproof hose comprising
- forming an inner tube layer prepared from a composition comprising a PTFE;
- braiding a first reinforcing layer comprising a metallic braid over the inner tube layer;
- extruding a silicone rubber composition over the reinforcing layer to form a thermal insulating layer to form a green hose, wherein the silicone rubber composition comprises a silicone base rubber, an expandable graphite, and a zinc borate, comprising a weight ratio of zinc borate to expandable graphite between from about 12:1 to about 2.5:1;
- and
- curing the green hose to form the fireproof hose.
2 more elements
Dependencies are inferred from the claim text.