Copolymers of ethylene and 1,3-butadiene
AssigneeCompagnie Generale Des Etablissements Michelin
InventorsRobert NGO, Julien THUILLIEZ, Thibaut SOUCHARD
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Abstract
A copolymer of ethylene and of 1,3-butadiene which contains ethylene units, butadiene units and 1,2-cyclohexane units and which exhibits a number-average molar mass of greater than 10 000 g/mol is provided. The molar content of ethylene units in the copolymer is greater than 90% and less than or equal to 97%, and the molar content of 1,2-cyclohexane units in the copolymer is greater than 1%. The molar contents is calculated with respect to the total number of moles of ethylene, butadiene and 1,2-cyclohexane units. Such a copolymer can be used as thickener in engine lubricating compositions.
Claims20
A copolymer of ethylene and of 1,3-butadiene which contains ethylene units, butadiene units and 1,2-cyclohexane units and which exhibits a number-average molar mass of greater than 10 000 g/mol, the molar content of ethylene units in the copolymer being greater than 90% and less than or equal to 97%, the molar content of 1,2-cyclohexane units in the copolymer being greater than 1%, the molar contents being calculated with respect to the total number of moles of ethylene, butadiene and 1,2-cyclohexane units.
Dependencies are inferred from the claim text.