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

Claim 8:
9. A heat storage member comprising:
a heat storage material; and
a flame retardant,
wherein Condition C is satisfied,
Condition C: a gas generation temperature Tr of the flame retardant obtained by Measuring Method C1 is lower than a gas generation temperature Tc of a specific member obtained by Measuring Method C2,
Measuring Method C1: a type and a content of the flame retardant contained in the heat storage member 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 (C1), 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)  (C1)

in Expression (C1), 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 (C1), and the obtained temperature is defined as the gas generation temperature Tr (° C.) of the flame retardant,
Measuring Method C2: a weight change of the heat storage member due to heating is measured by using the thermogravimeter-differential thermal analyzer, and a relational expression, which is represented by Expression (C2), between the temperature T (° C.) and a weight reduction ratio Δm3(T) of the heat storage member is derived based on a measurement result,

Δm3(T)=(m30−m3(T))/(m30)  (C2)

in Expression (C2), m3(T) represents a weight of the heat storage member at the temperature T (° C.) and m30 represents a weight of the heat storage member before heating,
further, a type and a content of a solvent, which is contained in the heat storage member 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 member 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 (C3), 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)  (C3)

in Expression (C3), 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 (C4), between the temperature T (° C.) and a weight reduction ratio Δmz(T) of the specific member obtained by removing the flame retardant and the solvent from the heat storage member is derived,

Δmz(T)=(100*Δm3(T)−a*Δma(T)−b*Δmb(T))/(100−a−b)  (C4)

in Expression (C4), a represents a ratio (% by mass) of the content of the flame retardant to a total mass of the heat storage member, b represents a ratio (% by mass) of the content of the solvent to the total mass of the heat storage member, and Δma(T) represents the weight reduction ratio of the flame retardant obtained by Measuring Method C1,
a temperature at which the weight reduction ratio Δmz(T) of the specific member reaches 2% by mass is obtained by using Expression (C4), and the obtained temperature is defined as the gas generation temperature Tc (° C.) of the specific member.