Visible light absorbing peroxy-esters

Claim 2

A peroxy compound having the general formula: ##STR3## where R 1 is alkyl, aralkyl, alkoxalkyl, alkenyl, alkynyl or carboxyalkyl; R 2 is any group which does not cause spontaneous decomposition of the peroxy group; x and y are integers between 0 and 4 and x+y is greater than or equal to 1.

Claim 3

A compound as in claim 1 where R 2 is H, alkyl, alkoxy, carboalkoxyl, silyl, nitro, alkenyl, alkynyl, halo, or when R 1 is not carboxyalkyl, amino, alkylamino or dialkylamino.

Claim 4

A compound as in claim 1 where x equals 1 and y equals 0.

Claim 5

A compound as in claim 1 wherein x equals 1 and y equals 1.

Claim 6

A compound as in claim 3 wherein the R 2 groups include at least one nitro group.

Claim 7

A compound as in claim 3 wherein the peroxy group is located in the 1,2, or 4 position.

Claim 8

A compound as in claim 1 wherein R 1 is t-butyl.

Claim 9

A compound as in claim 1 comprising a polymeric backbone having at least one group defined by the general formula of claim 1 attached thereto through an R 1 or R 2 group.

Claim 10

A compound as in claim 1 decomposable into free radicals upon exposure to light of greater than 400 nm wavelength.

Claim 11

A compound as in claim 1 selected from the t-butyl peroxy esters of: (a) fluorenone-1-carboxylic acid; (b) fluorenone-2-carboxylic acid; (c) fluorenone-4-carboxylic acid; (d) fluorenone-2,5-dicarboxylic acid; (e) fluorenone-2,7-dicarboxylic acid; (f) fluorenone-2,6-dicarboxylic acid; (g) 7-nitrofluorenone-2-carboxylic acid; (h) 7-methoxyfluorenone-2-carboxylic acid; (i) 7-acetylfluorenone-2-carboxylic acid; (j) 7-chlorofluorenone-2-carboxylic acid; (k) 7-bromofluorenone-2-carboxylic acid; (l) 7-cyanofluorenone-2-carboxylic acid; (m) 7-ethylfluorenone-2-carboxylic acid; (n) 7-butylfluorenone-2-carboxylic acid; (o) 7-butoxycarbonylfluorenone-2-carboxylic acid; (p) 7-propoxycarbonylfluorenone-2-carboxylic acid; (q) N,N-dialkyl-7-aminofluorenone-2-carboxylic acid; (r) 4,5,7-trinitrofluorenone-2-carboxylic acid; (s) 4,5-dinitrofluorenone-2,7-dicarboxylic acid; (t) 2,5,7-trinitrofluorenone-4-carboxylic acid; and (u) 7-nitrofluorenone-4-carboxylic acid.

Claim 12

In a free radical curable composition, a cure catalyst comprising a peroxy ester compound as defined by the general formula ##STR4## wherein R 1 is alkyl, aralkyl, alkoxyalkyl, alkenyl, alkynyl or carboxyalkyl R 2 is any group which does not cause spontaneous decomposition of the peroxy group; x and y are integers between 0 and 4 and x plus y is greater than or equal to 1.

Claim 13

In a free radical curable composition, a cure catalyst comprising a peroxy ester compound as defined by the general formula ##STR4## wherein R 1 is alkyl, aralkyl, alkoxyalkyl, alkenyl, alkynyl or carboxyalkyl R 2 is any group which does not cause spontaneous decomposition of the peroxy group; x and y are integers between 0 and 4 and x plus y is greater than or equal to 1.

Claim 14

A composition as in claim 11 where the free radical curable composition comprises at least acrylic functional monomer or prepolymer.

Claim 15

A composition as in claim 12 further comprising an activator of the decomposition of said peroxy compound into free radicals.

Claim 16

A composition as in claim 11 wherein said peroxy ester structure is linked to a polymeric backbone through an R 1 or R 2 group.

Claim 17

A composition as in claim 11 wherein said peroxy compound decomposable into free radicals upon exposure to light of greater than 400 nm wavelength.

Claim 22

A method as in claim 17 wherein said light inaccessible areas are cured at ambient temperature.

Claim 25

A method as in claim 19 where R 1 is alkyl, aralkyl, alkoxyalkyl, alkenyl, alkynyl or carboxyalkyl.

Claim 26

A method as in claim 20 where R 1 is alkyl.

Claim 27

A method as in claim 19 where R 2 includes at least one nitro group.

Claim 28

A method as in claim 21 where the unsaturated compound is an acrylic functional compound.

Claim 29

A peroxy compound as in claim 1 wherein R 1 is alkyl.