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US 2026/0045593 A1Published application
Thermal insulating material
AssigneeNitto Denko Corporation
InventorsMaho KAWAKAMI, Kakeru TSUJITA
Life of this patent
Estimating the term…
Abstract
Provided is a thermal insulating material including a thermal insulating layer. The thermal insulating layer contains silicon dioxide particles having a BET specific surface area of 90 m2/g or more and less than 380 m2/g, inorganic fiber, and at least one kind of non-polymeric dispersant represented by Formula (A1), (A2), (A3), or (A4) as follows.
Claims17
A thermal insulating material comprising:
- a thermal insulating layer comprising silicon dioxide particles having a BET specific surface area of 90 m2/g or more and less than 380 m2/g, inorganic fiber, and at least one kind of non-polymeric dispersant represented by Formula (A1), (A2), (A3), or (A4) as follows:
- wherein, in Formulae (A1) and (A2), R1, R2, R3, and R4 each independently represents a hydrocarbon group optionally including a hetero atom;
- a total number of carbon atoms derived by combining hydrocarbon groups R1, R2, R3, and R4 is 8 to 40;
- and hydrocarbon groups R1, R2, R3, and R4 optionally bind to one another to form a cyclic structure;
- wherein, in Formula (A3), R5 represents a hydrocarbon group optionally including a hetero atom;
- R6 and R7 each independently represents a hydrogen atom or a hydrocarbon group optionally including a hetero atom;
- a total number of carbon atoms derived by combining hydrocarbon groups R5, R6, and R7 is 8 to 40;
- and hydrocarbon groups R5, R6, and R7 optionally bind to one another to form a cyclic structure;
- and
- wherein, in Formula (A4), R8 and R9 each independently represents a hydrocarbon group optionally including a hetero atom;
- a total number of carbon atoms derived by combining hydrocarbon groups R8 and R9 is 8 to 40;
- and hydrocarbon groups R8 and R9 optionally bind to one another to form a cyclic structure.
9 more elements
A method of producing a thermal insulating material comprising:
- mixing silicon dioxide particles, inorganic fiber, and a non-polymeric dispersant represented by Formula (A1), (A2), (A3), or (A4) as follows in a solvent to prepare a mixture liquid,
- applying the mixture liquid prepared in the mixing to provide an applied film, and
- shaping the applied film provided in the applying step to provide a thermal insulating layer:
- wherein, in Formulae (A1) and (A2), R1, R2, R3, and R4 each independently represents a hydrocarbon group optionally including a hetero atom;
- a total number of carbon atoms derived by combining hydrocarbon groups R1, R2, R3, and R4 is 8 to 40;
- and hydrocarbon groups R1, R2, R3, and R4 optionally bind to one another to form a cyclic structure;
- wherein, in Formula (A3), R5 represents a hydrocarbon group optionally including a hetero atom;
- R6 and R7 each independently represents a hydrogen atom or a hydrocarbon group optionally including a hetero atom;
- a total number of carbon atoms derived by combining hydrocarbon groups R5, R6, and R7 is 8 to 40;
- and hydrocarbon groups R5, R6, and R7 optionally bind to one another to form a cyclic structure;
- and
- wherein, in Formula (A4), R8 and R9 each independently represents a hydrocarbon group optionally including a hetero atom;
- a total number of carbon atoms derived by combining hydrocarbon groups R8 and R9 is 8 to 40;
- and hydrocarbon groups R8 and R9 optionally bind to one another to form a cyclic structure.
11 more elements
Dependencies are inferred from the claim text.