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US 12,162,969 B2Granted
Acrylic rubber, acrylic rubber composition, crosslinked acrylic rubber, seal material, and hose material
AssigneeZeon Corporation
InventorsFumiaki Bando, Susumu Sato
Life of this patent
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Abstract
An acrylic rubber containing acrylate monomer units, methacrylate monomer units, and crosslinkable monomer units, wherein a glass transition temperature is −20° C. or less, a change ratio in volume after a crosslinked rubber of the acrylic rubber is immersed in IRM903 oil at 150±2° C. for 72 hours is 0 to 100%, and a change ratio in weight after a crosslinked rubber of the acrylic rubber is immersed in hot water at 150±2° C. for 96 hours and dried is −5.0 to 0%.
Claims12
An acrylic rubber comprising:
- acrylate monomer units;
- methacrylate monomer units;
- and
- crosslinkable monomer units;
- wherein a glass transition temperature is −20° C. or less, a change ratio in volume after a crosslinked rubber of the acrylic rubber is immersed in IRM903 oil at 150±2° C. for 72 hours is 0 to 100%, and a change ratio in weight after the crosslinked rubber of the acrylic rubber is immersed in hot water at 150±2° C. for 96 hours and dried is-5.0 to 0%,
- wherein a content of the acrylate monomer units is 80% by weight or less, based on a total amount of 100% by weight of total monomer units constituting the acrylic rubber,
- wherein a content of the methacrylate monomer units is 17.9% by weight or more, based on a total amount of 100% by weight of total monomer units constituting the acrylic rubber, and
- wherein none of the crosslinkable monomer units include epoxy groups.
5 more elements
Dependencies are inferred from the claim text.