Shaped articles of polyfluoropolyethers having pendant perfluoroalkoxy groups

Claim 2

An article comprising a substrate having a release coating thereon, said release coating comprising a polymer having a backbone comprising randomly distributed, perfluorooxyalkylene units represented by the formulas ##STR156## and backbone-pendant perfluoroalkoxy groups, the terminal ether oxygen atoms of which are bonded to carbon atoms of the --CFO and --CF 2 CFO backbone units.

Claim 3

The article of claim 1 wherein said release coating comprises the polymerized product of a functional polyfluoropolyether composition said composition comprising polyfluoropolyethers represented by the formula ##STR157## where Y is any terminal functional group which is or contains a functional moiety which can enter into an addition or condensation reaction to form a homopolymer or copolymer; R 6 is Y, a perfluoroalkyl group, or a haloperfluoroalkyl group; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from ##STR158## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; k is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; l is a number representing the average number of --CF 2 CF 2 -- units randomly distributed within the chain and has a value of 1 to 200; p and p' are each a number representing the average number of ##STR159## units, respectively, randomly distributed within the chain, the sum of p and p' has a value of 1 to 50, and p/p' is 0 to 5; the ratio k/l is less than 5; the ratio (p+p')/(k+l) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropolyether is from about 650 to 20,000 or polyfluoropolyethers represented by the formula ##STR160## wherein Y is a term:inal functional group which is or contains a functional moiety; R 7 is a perfluoroalkyl group, haloperfluoroalkyl, or the terminal functional group Y; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a saturated perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from ##STR161## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; q is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 up to about 50; r is a number representing the average number of ##STR162## units randomly distributed within the chain and has a value of 5 up to about 50; s and s' are each a number representing the average number of ##STR163## units, respectively, randomly distributed within the chain, the sum of s and s' has a value of 1 up to about 50, and the ratio s/s' is 0 to 5; the ratio q/r is 0.01 to 1.0; the ratio (s+s')/(q+r) is 0.01 to 1.0; and the number average molecular weight of the polyfluoropolyether is from about 650 to 10,000.

Claim 4

The article of claim 2 wherein said polyfluoropolyether has a functional moiety selected from acrylate or methacrylate, said ratio q/r is 0.10 to 1.0, said ratio (s+s')/(q+r) is 0.05 to 1.0, and said number average molecular weight of the backbone segment within the braces is 1500 to 10,000.

Claim 5

The article of claim 2 wherein said substrate is flexible film.

Claim 6

The article of claim 4 further comprising an adhesive layer releasably adhered to said polymerized release coating.

Claim 7

The article of claim 5 wherein said adhesive is a poly(dimethylsiloxane) pressure-sensitive adhesive.

Claim 8

A shaped article comprising a polymer having a backbone comprising randomly distributed, perfluorooxyalkylene units represented by the formulas ##STR164## and backbone-pendant perfluoroalkoxy groups, the terminal ether oxygen atoms of which are bonded to carbon atoms of the ##STR165## backbone units.

Claim 9

A shaped article comprising a polymer having a backbone comprising randomly distributed, perfluorooxyalkylene units represented by the formulas ##STR164## and backbone-pendant perfluoroalkoxy groups, the terminal ether oxygen atoms of which are bonded to carbon atoms of the ##STR165## backbone units.

Claim 10

The shaped article of claim 7 wherein said polymer is the polymerized product of a polymerizable polyfluoropolyether composition said composition comprising a functional derivative of normally liquid peroxidic poly(perfluorooxyalkylene) compositions comprising a mixture of peroxidic poly(perfluorooxyalkylene) compounds, each compound comprising a backbone of randomly distributed, perfluorooxyalkylene units represented by the formulas ##STR166## which when bonded to an --O-- of any of the perfluorooxyalkylene units, forms a peroxy group, --O--O--, which imparts the peroxidic characteristics to the composition and backbone-pendant perfluoroalkoxy groups, the terminal ether oxygen atoms of which are bonded to carbon atoms of the ##STR167## backbone units.

Claim 11

The article of claim 7 wherein said article is molded.

Claim 12

The article of claim 7 wherein said article is an opthalmic device.

Claim 13

The ophthalmic device of claim 10 wherein said polyfluoropolyether composition comprises the polyfluoropolyethers represented by the formula ##STR168## where Y is any terminal functional group which is or contains a functional moiety which can enter into an addition or condensation reaction to form a homopolymer or copolymer; R 6 is Y, a perfluoroalkyl group, or a haloperfluoroalkyl group; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a perfluoroalkyl group of perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from ##STR169## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; k is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; l is a number representing the average number of --CF 2 CF 2 -- units randomly distributed within the chain and has a value of 1 to 200; p and p' are each a number representing the average number of ##STR170## units, respectively, randomly distributed within the chain, the sum of p and p' has a value of 1 to 50, and p/p' is 0 to 5; the ratio k/l is less than 5; the ratio (p+p')/(k+l) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropolyether is from about 650 to 20,000 or polyfluoropolyethers represented by the formula ##STR171## wherein Y is a terminal functional group which is or contains a functional moiety; R 7 is a perfluoroalkyl group, haloperfluoroalkyl, or the terminal functional group Y; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a saturated perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from ##STR172## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; q is a uumber representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 up to about 50; r is a number representing the average number of ##STR173## units randomly distributed within the chain and has a value of 5 up to about 50; s and s' are each a number representing the average number of ##STR174## units, respectively, randomly distributed within the chain, the sum of s and s' has a value of 1 up to about 50, and the ratio s/s' is 0 to 5; the ratio q/r is 0.01 to 1.0; the ratio (s+s')/(q+r) is 0.01 to 1.0; and the number average molecular weight of the polyfluoropolyether is from about 650 to 10,000.

Claim 14

The article of claim 7 wherein said article is a gas permeable membrane.

Claim 15

The membrane of claim 12 wherein said polyfluoropolyether composition comprises the polyfluoropolyethers represented by the formula ##STR175## where Y is any terminal functional group which is or contains a functional moiety which can enter into an addition or condensation reaction to form a homopolymer or copolymer; R 6 is Y, a perfluoroalkyl group, or a haloperfluoroalkyl group; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a perfluoroalkyl group of perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 -- and ##STR176## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; k is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; l is a number representing the average number of --CF 2 CF 2 -- units randomly distributed within the chain and has a value of 1 to 200; p and p' are each a number representing the average number of ##STR177## units, respectively, randomly distributed within the chain, the sum of p and p' has a value of 1 to 50, and p/p' is 0 to 5; the ratio of k/l is less than 5; the ratio --p+p')/(k+l) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropolyether is from about 650 to 20,000 or polyfluoropolyethers represented by the formula ##STR178## wherein Y is a terminal functional group which is or contains a functional moiety; R 7 is a perfluoroalkyl group, haloperfluoroalkyl, or the terminal functional group Y; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a saturated perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from ##STR179## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; q is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of L up to about 50; r is a number representing the average number of ##STR180## units randomly distributed within the chain and has a value of 5 up to about 50; s and s' are each a number representing the average number of ##STR181## units, respectively, randomly distributed within the chain, the sum of s and s' has a value of L up to about 50, and the ratio s/s' is 0 to 5; the ratio q/r is 0.01 to 1.0; the ratio (s+s')/(q+r) is 0.01 to 1.0; and the number average molecular weight of the polyfluoropolyether is from about 650 to 10,000.