Elkem Silicones France Sas

Rhodia Chimie

Bluestar Silicones France Sas

Gérald Guichard

Ian Hawkins

Jean-Marc Frances

Yves Giraud

Stefan Breunig

Nadia Martin

Serge Montarnel

Jérôme Bordas

Rose-Line Gaillard Montarnal, Legal Representative

Karine Paillot

Laure Montarnal, Legal Representative

Karsten Schlichter

The invention relates to a method for the additive manufacturing of a silicone elastomer article. In particular, the invention relates to a method for the additive manufacturing of a silicone elastomer article and a support using a 3D printer.

Method for the additive manufacturing of a silicone elastomer article

The present invention relates to compositions in the form of silicone oil emulsions intended to be applied to curing bladders as a mould-release agent during tyre production.

Polyorganosiloxane-based composition intended for tyre moulding/stripping

A method of lubricating an expandable rubber bladder is described for use during a vulcanization of a green tire within a metal press. The method can include applying compositions in the form of emulsions of silicone oils to the inner surface of the green tires and/or to the outer surface of the vulcanization bladders to facilitate the molding-demolding thereof during the manufacture of the tires.

Lubrication method

The present invention relates to a composition I, in the form of an oil-in-water emulsion, based on siloxane and which does not emit hydrogen, comprising:

Siloxane-based composition, which does not emit hydrogen, intended for molding/mold-release of pneumatic tires

The invention concerns a method for preparing a lubricating composition, characterised in that it comprises mixing two previously prepared oil-in-water emulsions (A) and (B): the prior emulsion (A) comprises: (a) at least a non-reactive linear polyorganosiloxane oil comprising per molecule at least 2% in number of organic substituents bound to the silicon atoms which are aryl, alkylarylene and/or arylenealkyl radicals; (b) at least a polyorganosiloxane resin bearing hydroxyl groups and comprising at least two different siloxyl units selected among those formula (R)SiO(M), (R)SiO(D), RSiO(T) and SiO(Q), one at least of said units being a unit T or Q, Rrepresenting an organic substituent; (c) at least a crosslinking agent soluble in the silicone phase comprising at least two functions capable of reacting with the polyorganosiloxane resin(s) (b); (d) a condensation catalyst capable of catalysing the reaction of the constituent (b) with the constituent (c); (e) a surfactant; and (f) water; the prior emulsion (B) comprises: (a') at least a reactive linear polyorganosiloxane oil comprising at least two OH groups per molecule, and the constituents (b), (c), (d), (e) and (f) mentioned above: each of the prior emulsions (A) and (B) comprises: 5 to 95 parts by weight of constituent (a) or (a&#x2032;); 0.5 to 50 parts of constituent (b); 0.1 to 20 parts of constituent (c); 0.05 to 10 parts of constituent (d); for 100 parts of the sum (a)+(b)+(c)+(d) or (a&#x2032;)+(b)+(c)+(d); the amounts of surfactant and water being sufficient to obtain an oil-in-water emulsion; and the weight ratio emulsion (A)/emulsion (B) ranges between 1.5 and 4.

Method for preparing a lubricating composition based on polysiloxanes not releasing hydrogen

The invention concerns a lubricating composition, in the form of an oil-in-water emulsion, based on siloxane and not releasing hydrogen comprising: (a) a polydiorganosiloxane oil non-reactive to the lubricating properties having a dynamic viscosity of the order of 5.10to 30.10Pa.s at 25&#xb0; C.: (b) a reactive linear polydiorganosiloxane oil having per molecule at least two OH groups, said polydiorganosiloxane having a dynamic viscosity at 25&#xb0; C. ranging between 5.10to 30.10Pa.s: (c) a crosslinking agent soluble in the silicone phase comprising at least two functions capable of reacting with the reactive polydiorganicsiloxane oil (b); (d) a water soluble crosslinking agent: (e) a surfactant: (f) a condensation catalyst capable of catalysing the reaction of oil (b) with the crosslinking agent (c) and/or (d): and (g) water: compositions comprising a soluble polyorganosiloxane soluble in the silicone phase and bearing, before emulsification, condensable hydroxyl substitutes being excluded.

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Givors, France

Gérald Guichard