| 摘要 |
A method of making a fluoropolyether elastomer containing triazine groups and having a glass transition temperature of less than −40° C., including providing (i) one or more saturated fluoropolyethers containing repeating moieties selected from (—C4F8O—), (—C3F6O—), (—C2F4O—), (—CF2O—) and combinations thereof and further containing at least one functional group at a terminal carbon atom of the backbone chain, or of a side chain if present, wherein the terminal carbon atom may be a primary or secondary carbon atom and wherein the functional group is capable of reacting with a functional group of the fluorinated compound according to (ii) below to form a triazine ring, (ii) one or more fluorinated compound containing at least one perfluorinated alkyl or perfluorinated alkylene moiety wherein the carbon atoms of the perfluorinated alkyl or alkylene moiety may be interrupted by one or more oxygen atoms and wherein the fluorinated compound further contains at least one functional group capable of reacting with the functional group of the one or more fluoropolyethers to form a triazine; curing the components according to (i) and (ii) to form triazines. Further provided are cured compositions, articles comprising the cured compositions and methods of making articles. |
| 主权项 |
1. A method of making a fluoropolyether elastomer containing triazine groups and having a glass transition temperature of less than −40° C., comprising
a) providing (i) one or more saturated fluoropolyethers containing repeating moieties selected from (—C4F8O—), (—C3F6O—), (—C2F4O—), (—CF2O—) and combinations thereof and further containing at least one functional group at a terminal carbon atom of the backbone chain, or of a side chain if present, wherein the terminal carbon atom may be a primary or secondary carbon atom and wherein the functional group is capable of reacting with a functional group of the fluorinated compound according to (ii) below to form a triazine ring, (ii) one or more fluorinated compound selected from:
(1) a fluorinated amidine compound selected from:Rf1—C(═NH)NH2 and salts thereof, and H2N(HN═)C—Rf1—C(═NH)NH2 and salts thereof, wherein Rf1 is selected from a fluorinated alkyl group having from 1 to 20 carbon atoms, a fluorinated alkylene group having from 1 to 20 carbon atoms, a fluorinated aryl group having from 1 to 20 carbon atoms, a fluorinated arylene group having from 1 to 20 carbon atoms, and a fluorinated aralkyl group having from 1 to 20 carbon atoms;
(2) a fluorinated imidate selected from: HN═C(OR1)—Rf1 and salts thereof, and HN═C(OR1)—Rf1—C(OR1′)═NH and salts thereof, wherein Rf1 is as defined above, and wherein R1 and R1′ each represents, independently from each other, an alkyl group having from 1 to 10 carbon atoms;
(3) a fluorinated amidrazone selected from: Rf1[—C(NH)NHNH2]n and salts thereof, wherein Rf1 is as defined above and n is 1 or 2; and
(4) a fluorinated amidoxime selected from: Rf1—[C(NH2)NOH]n and salts thereof, wherein Rf1 is as defined above and n is 1 or 2; and, b) curing the components according to (i) and (ii) to form triazines. |
