Patent ID: 11959010
Assignee: FUJIFILM CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  F  Y | IPC C  F

Claim 0:
1. A heat storage composition comprising:
a heat storage material; and
a flame retardant,
wherein Condition A is satisfied,
Condition A: a gas generation temperature Tr of the flame retardant obtained by Measuring Method A1 is lower than a gas generation temperature Ta of a specific composition obtained by Measuring Method A2,
Measuring Method A1: a type and a content of the flame retardant contained in the heat storage composition are identified, a weight change of the flame retardant due to heating is measured by using a thermogravimeter-differential thermal analyzer, and a relational expression, which is represented by Expression (A1), between a temperature T (° C.) and a weight reduction ratio Δma(T) of the flame retardant is derived based on a measurement result,

Δma(T)=(ma0−ma(T))/(ma0)  (A1)

in Expression (A1), ma(T) represents a weight of the flame retardant at the temperature T (° C.) and ma0 represents a weight of the flame retardant before heating, a temperature at which the weight reduction ratio Δma(T) of the flame retardant reaches 2% by mass is obtained by using Expression (A1), and the obtained temperature is defined as the gas generation temperature Tr (° C.) of the flame retardant,
Measuring Method A2: a weight change of the heat storage composition due to heating is measured by using the thermogravimeter-differential thermal analyzer, and a relational expression, which is represented by Expression (A2), between the temperature T (° C.) and a weight reduction ratio Δm1(T) of the heat storage composition is derived based on a measurement result,

Δm1(T)=(m10−m1(T))/(m10)  (A2)

in Expression (A2), m1(T) represents a weight of the heat storage composition at the temperature T (° C.) and m10 represents a weight of the heat storage composition before heating,
further, a type and a content of a solvent, which is contained in the heat storage composition and has a boiling point of 100° C. or lower, are identified; as a result of measurement, in a case in which the heat storage composition contains the solvent, a weight change of the solvent due to heating is measured by using the thermogravimeter-differential thermal analyzer, and a relational expression, which is represented by Expression (A3), between the temperature T (° C.) and a weight reduction ratio Δmb(T) of the solvent is derived based on a measurement result,

Δmb(T)=(mb0−mb(T))/(mb0)  (A3)

in Expression (A3), mb(T) represents a weight of the solvent at the temperature T (° C.) and mb0 represents a weight of the solvent before heating,
a relational expression, which is represented by Expression (A4), between the temperature T (° C.) and a weight reduction ratio Δmx(T) of the specific composition obtained by removing the flame retardant and the solvent from the heat storage composition is derived,

Δmx(T)=(100*Δm1(T)−a*Δma(T)−b*Δmb(T))/(100−a−b)  (A4)

in Expression (A4), a represents a ratio (% by mass) of the content of the flame retardant to a total mass of the heat storage composition, b represents a ratio (% by mass) of the content of the solvent to the total mass of the heat storage composition, and Δma(T) represents the weight reduction ratio of the flame retardant obtained by Measuring Method A1, a temperature at which the weight reduction ratio Δmx(T) of the specific composition reaches 2% by mass is obtained by using Expression (A4), and the obtained temperature is defined as the gas generation temperature Ta (° C.) of the specific composition.