The invention relates to a rubber composition based on at least one reinforcing filler having a silica content of greater than or equal to 80 phr, preferably greater than or equal to 100 phr and of an elastomer matrix having a content of a modified diene elastomer greater than or equal to 75 phr, the modified diene elastomer comprising macromolecules having within their structure a linear or branched polyether block, comprising at each of the two ends of the block a branching point, to which up to three diene elastomer branches and up to three -OR groups are bonded, R representing, independently of each other, a C1-C8 alkyl substituent or a hydrogen atom, a-copolymer having a Mooney viscosity of at least 30, preferably of at least 40 and at most 100, b-copolymer being composed of at least 20%, preferably of at least 30%, of branched macromolecules having a polyether block, to which at least three diene elastomer blocks are bonded, of at most 80%, preferably of at most 70%, of linear macromolecules, c-polyether block having a number-average molecular weight ranging from 150 to 5000 g/mol, and d-each of the branching points consisting of a silicon atom.
本发明涉及橡胶组合物,所述橡胶组合物基于至少一种增强填料和弹性体基质,所述增强填料具有含量大于或等于80phr,优选大于或等于100phr的二氧化硅,所述弹性体基质具有含量大于或等于75phr的经改性的二烯弹性体,所述经改性的二烯弹性体包含大分子,所述大分子在其结构内包含线型或支化的聚醚嵌段,所述聚醚嵌段在嵌段的两个端部的每一个处包含支化点,所述支化点键合至至多三个二烯弹性体支链和至多三个‑OR基团,R彼此独立地表示C1‑C8烷基取代基或氢原子,a‑共聚物的门尼粘度至少为30,优选至少为40且至多为100,b‑共聚物由以下物质组成:‑至少20%,优选至少30%的支化大分子,所述支化大分子包含键合至至少三个二烯弹性体嵌段的聚醚嵌段,‑至多80%,优选至多70%的线型大分子,c‑聚醚嵌段的数均分子量为150g/mol至5000g/mol,以及d‑每个支化点均由硅原子组成。
RUBBER COMPOSITION BASED ON MODIFIED DIENE ELASTOMER
基于经改性的二烯弹性体的橡胶组合物
2021-06-18
Patent
Electronic Resource
Chinese
IPC: | C08G MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind / B60C VEHICLE TYRES , Fahrzeugreifen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |
Rubber composition comprising a modified diene elastomer
European Patent Office | 2021
|RUBBER COMPOSITION COMPRISING A MODIFIED DIENE ELASTOMER
European Patent Office | 2020
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