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Method for producing a diene elastomer modified with a 1,3-dipolar compound by means of reactive extrusion

A technology of diene elastomer and dipole compound, which is applied in the field of diene elastomer modification, can solve the problems of difficult preparation stage, fluctuation of graft yield, etc.

Active Publication Date: 2019-08-02
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At the time of discharge, it was found that the mixture including the filler fell in powder form, which made it difficult to use the mixture including the filler in the subsequent stage of preparation of the rubber composition
The graft yield was also found to fluctuate and may reach relatively low values

Method used

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  • Method for producing a diene elastomer modified with a 1,3-dipolar compound by means of reactive extrusion
  • Method for producing a diene elastomer modified with a 1,3-dipolar compound by means of reactive extrusion

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Embodiment Construction

[0010] I. Detailed description of the invention

[0011] In this specification, all percentages (%) shown are % by weight unless otherwise expressly stated. The abbreviation "phr" denotes parts by weight per hundred parts of elastomer (or the sum of the elastomers if several elastomers are present).

[0012] Any numerical interval marked by the expression "between a and b" denotes a numerical range extending from greater than a to less than b (i.e. excluding the limits a and b), whereas any numerical range marked by the expression "from a to b" A numerical range is indicated from a to b (ie including the strict limits a and b).

[0013] The expression "composition based on" is understood in this description to mean that the composition comprises a mixture and / or in situ reaction product of the various components used, some of these basic components (e.g. elastomers, fillers or conventionally used Other additives of the rubber composition intended for the manufacture of tire...

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Abstract

The present invention relates to a method for producing a diene elastomer modified with a 1,3-dipolar compound by means of the reactive extrusion of a blend of a diene elastomer and a 1,3-dipolar compound in a twin-screw extruder at an extrusion temperature greater than 100 DEG C. Such a method is reproducible and allows the grafting reaction to be well controlled.

Description

technical field [0001] The present invention relates to a method for modifying diene elastomers by reaction of grafting 1,3-dipolar compounds. Background technique [0002] The modification of diene elastomers with 1,3-dipolar compounds is known. The modification takes place by a [3+2]-cycloaddition reaction of 1,3-dipolar compounds on the double bond of the elastomeric diene unit. In general, the 1,3-dipolar compounds used are compounds which, in addition to dipoles, carry chemical functional groups capable of grafting side-chain chemical functional groups to the elastomer. Such modified elastomers are intended for use in tire rubber compositions. These modification reactions can be carried out in solution or in bulk (for example in an internal mixer), as described in documents WO 2012007442, WO 2015059271 and WO 2015177105, for example. When the modified elastomer is intended for use in rubber compositions including reinforcing fillers and when modified by thermomechani...

Claims

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Application Information

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IPC IPC(8): C08L9/00C08L9/02C08L21/00
CPCC08C19/22C08K3/04C08K5/548C08L15/00B29B7/005B29B7/60B29B7/7485B29B9/02B29B15/08C08F2/01C08F8/32C08F279/02C08K5/315
Inventor R·赛德-迪亚塔
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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