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US 12,247,111 B2Granted
Fluoroelastomer composition
AssigneeSolvay Specialty Polymers Italy S.P.A.
InventorsStefano Bossolo, Matteo Fantoni, Margherita Albano
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Abstract
The invention pertains to a fluoroelastomer composition comprising a vinylidene-fluoride based fluoroelastomer, a polyhydroxylated compound, a basic compound, a pyridinium-type salt having an aromatic ring-quaternized nitrogen atom, and comprising at least two groups having a central carbon atom which bears acidic hydrogen atoms; and an accelerant, which possesses an improved molding behaviour, leading to shaped parts possessing less blisters and surface defects.
Claims14
A fluoroelastomer composition [composition (C)], said composition comprising:
- at least one vinylidene-fluoride based fluoroelastomer [fluoroelastomer (A)] comprising recurring units derived from vinylidene fluoride (VDF) and from at least one additional (per)fluorinated monomer different from VDF;
- at least one polyhydroxylated compound [compound (OH)];
- at least one basic compound [base (B)];
- at least one pyridinium salt [salt (P)] having an aromatic ring-quaternized nitrogen atom, and comprising at least two groups [groups (alpha-H)] having a carbon atom which bears at least a hydrogen atom and which is covalently bound to a sp2-hybridized carbon of an annular aromatic carbon which is in ortho and/or para position to the said aromatic ring-quaternized nitrogen atom;
- and
- at least one accelerant [accelerant (A)], different from the at least one pyridinium salt [salt (P)], selected from the group consisting of organic P-onium compound, As-onium compound, Sb-onium compound, S-onium compound, amino-phosphonium derivatives, phosphoranes, and diphosphine-iminium compounds.
3 more elements
Dependencies are inferred from the claim text.