Patent ID: 11920047
Assignee: SOCIÉTÉ BIC
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 6:
7. An aqueous suspension of thermochromic pigment microcapsules comprising:
thermochromic pigment microcapsules encapsulating a thermochromic pigment composition comprising:
(A) at least one electron-donating color-developing organic compound,
(B) at least one electron-accepting compound, and
(C) at least one color change temperature regulator,

a monocarboxylic or polycarboxylic acid,
a copolymer surfactant comprising at least one monomer of maleic anhydride,
water
the aqueous suspension of thermochromic pigment microcapsules having a pH lower than or equal to 4.6.