Polydiene rubbers with functionalized end groups.
By using a second functionalizing agent with cyclic amines, the issues of reduced Mooney scorch time and extrudability in polydiene rubbers are addressed, leading to improved compound properties for tire manufacturing.
JP7765396B2Active Publication Date: 2025-11-06ARLANXEO DEUT GMBH
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Patent Information
- Application Number
- JP2022554895
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2020-03-26
- Filing Date
- 2021-03-24
- Publication Date
- 2025-11-06
- Estimated Expiration
- 2041-03-24
AI Technical Summary
Technical Problem
Polydiene rubbers modified with cyclic amines exhibit reduced Mooney scorch time and extrudability, leading to inferior processability and surface defects in rubber compositions, particularly when combined with carbon-based fillers.
Method used
Introduce a second functionalizing agent in addition to a cyclic amine to modify polydiene rubbers, resulting in improved Mooney scorch time and extrudability, and enhance the properties of the resulting compounds.
Benefits of technology
The modified polydiene rubbers demonstrate enhanced Mooney scorch time and extrudability, producing compounds with improved properties suitable for tire production.
✦ Generated by Eureka AI based on patent content.
Abstract
General formula (I) TIFF2023519535000024.tif47155 (wherein R1 represents a saturated or unsaturated, linear or branched, preferably aliphatic hydrocarbon group having 1 to 20 carbon atoms, which may contain, in addition to C and H, one or more heteroatoms preferably selected from the group consisting of O, N, S, or Si; R2 and R3 are the same or different and represent saturated or unsaturated hydrocarbon groups having 1 to 20 carbon atoms, which may contain, in addition to C and H atoms, one or more heteroatoms preferably selected from the group consisting of O, N, S, and Si; A represents a residue selected from the group consisting of O-R4-OH, R5-OH, and R6-NH-R7, preferably O-R4-OH; R4, R5, and R6 are saturated or unsaturated hydrocarbon groups. and R7 represents H or a linear, branched, or cyclic, aliphatic or aromatic hydrocarbon group having 1 to 20 carbon atoms, which may contain, in addition to the C and H atoms, one or more heteroatoms independently selected from O, N, S, or Si, and which contains 1 to 20 carbon atoms, wherein the polymer is a homopolymer of a conjugated diene or a copolymer of at least one or more conjugated dienes with one or more vinyl aromatic monomers and, optionally, one or more other comonomers. Also provided are processes for making the polymers and articles made using the polymers.
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