Curing agents for compounds
AssigneeDuPont Polymers, Inc.
InventorsChristopher J Bish, Peter A Morken, Amiya Ratan Tripathy
Life of this patent
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Abstract
Curing fluoroelastomers using curing agents of formula, R1N═CR2R3, wherein R1 is H; R2 is selected from the group consisting of H, NH2, and NR4R5; R3 is selected from the group consisting of Ph, SO2H, NR6R7, 2-pyridine, and CH2CONH2; R4 is H; R5 is selected from the group consisting of Ph, NH2, and CN; R6 is selected from the group consisting of H, NHPh, CCONH2, C1 to C8 linear alkyl group, and C1 to C8 branched alkyl group; and R7 is selected from the group consisting of Ph, COOC(CH3)3, NH2, CH2COOH, CSNH2, CNHNH3+Cl−, p-phenylCN, COPh,
Claims10
An article, comprising a cured compound that, before curing, comprised:
- A) a fluoroelastomer comprising copolymerized units of:
- (1) one or more unsaturated fluorinated olefins,
- (2) one or more fluorovinyl ethers selected from the group consisting of perfluoro(alkyl vinyl) ethers, perfluoro(alkoxy vinyl) ethers, fluoro(alkyl vinyl) ethers, fluoro(alkoxy vinyl) ethers, and mixtures of these, and
- (3) one or more cure site monomer selected from the group consisting of nitrile-containing fluorinated olefins and nitrile-containing fluorinated vinyl ethers;
- and
- B) 0.1 to 10 weight percent of a curing agent of formula (I):
- R1N═CR2R3 (I)
- wherein:
- R1 is H;
- R2 is selected from the group consisting of NH2, and NR4R5;
- R3 is selected from the group consisting of SO2H, NR6R7, 2-pyridine, and CH2CONH2;
- R4 is H;
- R5 is selected from the group consisting of NH2, and CN;
- R6 is selected from the group consisting of H, CCONH2;
- and
- R7 is selected from the group consisting of COOC(CH3)3, NH2, CH2COOH, CNHNH3+Cl−, p-phenylCN, COPh,
Dependencies are inferred from the claim text.