Societe Bic

Christelle Debrauwer

Anne-Lise Damiano

Alexander Bourque

Olivier Albenge

Philippe Lefebvre

Guillaume Chollet

Francois Foulonneau

Carine Bethouart

Claire Evrard

Julien Gouerec

Guillaume Caffier

Khalid Zahouily

Frédéric Claptien

Wing Yam Liu

Nadège Esteveny

Kathy Vuillaume

Coralie Fricou

Laudine Buge

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.

A dry erase ink for a writing instrument. The dry erase ink includes, as the main organic solvent, a solvent selected from the group consisting of n-propyl acetate, isopropyl acetate, or mixtures thereof.

Dry erase ink with improved drying time

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

An alcohol-based dry-erasable ink for a writing instrument including, as separation agent, a mixture of glycerol, glycol and pentaerythritol ester.

Alcohol-based dry-erasable ink

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 pencil lead and a pencil containing the pencil lead wherein the pencil lead is polymer-based, extrudable, non-expanded, non-calcined and comprises graphite, of which 25% to 100% by weight or 50% to 100% by weight of the graphite, in relation to the total weight of the graphite, is expanded graphite.

Pencil lead

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

The disclosure relates to a solvent-free photocrosslinkable writing ink advantageously for a pen, including, as a percentage by weight relative to the total weight of the ink: a&#x2014;between 40 and 75% of a photocrosslinkable acrylate and/or methacrylate oligomer, b&#x2014;between 1 and 55%, optionally, of a photocrosslinkable acrylate and/or methacrylate monomer, c&#x2014;between 0.5 and 6% of a photoinitiator, d&#x2014;between 1 and 10% of a dye, advantageously a basic dye, and e&#x2014;between 0 and 10% of an additive. The present disclosure further relates to a method for securing a writing medium using the ink, the crosslinked ink obtained by crosslinking the ink and a pen for photocrosslinkable ink including the ink.

Photocrosslinkable writing ink

The present disclosure relates to a water-based correction fluid comprising a&#x2014;a photocrosslinkable acrylate and/or methacrylate oligomer, b&#x2014;a photoinitiator, c&#x2014;an opacifying agent, and d&#x2014;water, e&#x2014;optionally a photocrosslinkable acrylate and/or methacrylate monomer, and f&#x2014;optionally an additive. The fluid has a dry extract of between 40 and 80% by weight relative to the total weight of the fluid, advantageously between 54 and 66%, and forms a film after drying comprising at least 40% by weight of opacifying agent relative to the total weight of the film, advantageously between 40 and 80% by weight. The present disclosure also relates to a device for applying the correction fluid and a process for covering a mark on a paper support using the correction fluid.

Photocrosslinkable correction fluid

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.

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Saint Germain sur Morin, France

Christelle Debrauwer