Optically transparent, radiographically opaque tubing

Claim 2

A hollow flexible tube which is biologically inert optically non-opaque and radiographically opaque fabricated from a terpolymer represented by the general formula ##STR7## wherein A is selected from the group consisting of hydrogen and a phenyl radical; Y is selected from the group consisting of OH and a phenoxy radical; n has a value of from 1 to about 20; m has a value of from 1 to about 10; a has a value from 1 to about 30; C is a carbonate polymer containing the following two units, in random fashion, ##STR8## wherein R is independently selected from monovalent hydrocarbon radicals, V is independently selected from halogen radicals, L is independently selected from lower alkyl radicals, W has a value of from 1 to 4, and q has a value of from 0 to 2, provided that the sum of q and w does not exceed 4, and D is a carbonate end-capped polydiorganosiloxane.

Claim 3

The tube of claim 1 wherein V is bromine and w has a value of 2.

Claim 4

The tube of claim 2 wherein said carbonate chain stopped polydiorganosiloxane is represented by the general formula ##STR9## wherein R and R' are independently selected from hydrocarbon radicals, b has a value of from 2 to about 20, and z has a value of from 1 to about 4.

Claim 5

The tube of claim 2 wherein said carbonate chain stopped polydiorganosiloxane is represented by the general formula ##STR10## wherein R and R' are independently selected from hydrocarbon radicals; L is independently selected from lower alkyl radicals; V is independently selected from halogen radicals; q has a value of from 0 to 2 and w has a value of from 1 to 4, provided that the sum of w and q does not exceed 4; z has a value of from 1 to about 4; and b has a value of from 2 to about 20.

Claim 6

The tube of claim 2 wherein said carbonate chain stopped polydiorganosiloxane is represented by the general formula ##STR11## wherein R and R' are independently selected from hydrocarbon radicals; L is independently selected from lower alkyl radicals; V is independently selected from halogen radicals; q has a value of from 0 to 2 and w has a value of from 1 to 4, provided that the sum of w and q does not exceed 4; z has a value of from 1 to about 4; and b has a value of from 2 to about 20.

Claim 7

The tube of claim 4 wherein V is bromine, w is 2 and q is 0.

Claim 8

The tube of claim 4 wherein V is bromine, w is 2, L is a methyl radical, and q is 2.

Claim 9

The tube of claim 5 wherein V is bromine, w is 2 and q is 0.

Claim 10

The tube of claim 5 wherein V is bromine, w is 2, L is a methyl radical, and q is 2.

Claim 11

The tube of claim 2 wherein said tube is a catheter.

Claim 12

A hollow flexible tube which is biologically inert, optically non-opaque and radiographically opaque comprised of a terpolymer which is the intercondensation product of: (A) (i) a dihydric phenol chain stopped polydiorganosiloxane, (ii) a halogen substituted dihydric phenol chain stopped polydiorganosiloxane, or (iii) a dihydric phenol and halogen substituted dihydric phenol chain stopped polydiorganosiloxane, wherein said polydiorganosiloxane and said dihydric phenol or halogen substituted dihydric phenol are joined by aryloxy-silicon linkages and wherein said polydiorganosiloxane consists essentially of dialkylsiloxy units which are connected to each other by silicon-oxygen-silicon linkages wherein each of the silicon atoms has two organo radicals attached through a carbon-silicon bond; (B) a dihydric phenol; (C) a halogen substituted dihydric phenol; and (D) a carbonyl halide.

Claim 13

A hollow flexible tube which is biologically inert, optically non-opaque and radiographically opaque comprised of a terpolymer which is the intercondensation product of: (A) (i) a dihydric phenol chain stopped polydiorganosiloxane, (ii) a halogen substituted dihydric phenol chain stopped polydiorganosiloxane, or (iii) a dihydric phenol and halogen substituted dihydric phenol chain stopped polydiorganosiloxane, wherein said polydiorganosiloxane and said dihydric phenol or halogen substituted dihydric phenol are joined by aryloxy-silicon linkages and wherein said polydiorganosiloxane consists essentially of dialkylsiloxy units which are connected to each other by silicon-oxygen-silicon linkages wherein each of the silicon atoms has two organo radicals attached through a carbon-silicon bond; (B) a dihydric phenol; (C) a halogen substituted dihydric phenol; and (D) a carbonyl halide.

Claim 14

A hollow tube of claim 11 wherein said dihydric phenol is a bis-phenol and wherein said halogen substituted dihydric phenol is a halogen substituted bisphenol.

Claim 15

A hollow tube of claim 12 wherein said halogen substituted bisphenol is a bromo substituted bisphenol.

Claim 16

A hollow tube of claim 13 wherein said bromo substituted bisphenol is tetrabromo bisphenol.

Claim 17

A hollow tube of claim 11 wherein said bisphenol is 2,2-bis(4-hydroxyphenyl)propane and wherein said halogen substituted bisphenol is 2,2-bis(3,5-dibromo-4-hydroxyphenyl)propane.