Societe Bic

Anne-Lise Damiano

Christelle Debrauwer

Olivier Albenge

Alexander Bourque

Guillaume Chollet

Francois Foulonneau

Claire Evrard

Guillaume Caffier

Wing Yam Liu

Laudine Buge

François Foulonneau

A thermochromic pigment composition including: (A) at least one electron-donor organic dye compound, (B) at least one electron-acceptor compound, and (C) at least one compound responding to the following formula (I), in which: Ris H or a phenyl group, —Ris H or a phenyl group, and -n=1-8. The thermochromic pigment composition includes thermochromic pigment microcapsules ink compositions including such thermochromic pigment microcapsules, and writing instruments including such ink compositions.

Thermochromic pigment compositions

A thermochromic pigment composition including compounds of formula (I): The thermochromic pigment compositions having compounds of formula (I), include thermochromic pigment microcapsules. The thermochromic pigment capsules are useable for thermochromic pigment compositions in ink which may be used writing instruments.

The present disclosure concerns non-aqueous gel writing ink including a solvent, a coloring agent and a gelling agent, in which the gelling agent is a mixture of silica particles and of a fatty acid amide wax. It also concerns the process of preparation of the non-aqueous gel writing ink and the use of a mixture of silica particles and of a fatty acid amide wax, as a gelling agent in a non-aqueous gel writing ink. It finally concerns a writing instrument containing the ink according to the present disclosure.

Writing gel ink

A thermochromic pigment composition including: (A) at least one electron-donor organic dye compound, (B) at least one electron-acceptor compound, and (C) at least one compound corresponding to the following formula (I): in which: X is 0 or a single bond, Z is COO or OCO, Ris O-alkyl or (CH)CH&#x2014;Ris OCO(CH)CHor H, &#x2014;y=0-3, &#x2014;m=12-18; &#x2014;p=8-18, and on the condition that, when X is 0, y is other than 0. The thermochromic pigment composition are also useable in thermochromic pigment microcapsules ink compositions including the thermochromic pigment microcapsules, and writing instruments including the ink compositions.

A thermochromic pigment composition comprising: (A) at least one electron-donor organic dye compound, (B) at least one electron-acceptor compound, and (C) at least one compound. The thermochromic pigment composition is microencapsulated and is useable in writing instruments.

Thermochromic pigment composition

A writing instrument including a main body provided with a writing tip. The writing tip being supplied with ink by a free ink-type reservoir equipped with a pressure regulating device for regulating the pressure within the reservoir. The pressure regulating device includes at least one microfluidic valve.

Free ink writing instrument with microfluidic valve

A compensation membrane and a pen or the equivalent including a compensation membrane. The compensation membrane being configured for compensating a pressure difference between the outside and the inside of a free ink reservoir of a pen or the equivalent. The membrane including a first portion having a first rigidity and a second portion having a second rigidity, the first rigidity being less than the second rigidity.

Pressure difference compensation membrane

A compensation membrane for compensating a pressure difference between the outside and the inside of a free ink reservoir of a pen or the equivalent, the membrane comprising a first portion having a first rigidity, and a second portion having a second rigidity, the first rigidity being less than the second rigidity. A pen or the equivalent comprising a free ink reservoir provided with such a compensation membrane.

A fluid application device including a reservoir intended to contain a free fluid and a fluid delivery device, wherein the reservoir is sealed by a valve having a self-healing material. The fluid application device includes a tubular means for piercing the valve and for simultaneously placing fluid from the reservoir in communication with the fluid delivery device.

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Lagny sur Marne, France

Anne-Lise Damiano