Abrasion resistant coating compositions

Claim 2

A coating composition suitable for application to a substrate which coating composition comprises a polyvinyl acetal resin, a fluorinated aliphatic alcohol containing from 4 to 10 carbon atoms and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated as SiO 2 , to resin is from 1:1 to 5:1 and in which the ratio by weight of resin to alcohol is from 1:2 to 15:1.

Claim 3

The coating composition of claim 1 in which the fluorinated alcohol contains from 6 to 8 carbon atoms.

Claim 4

The coating composition of claim 1 in which the fluorinated alcohol comprises at least twice as many fluorine atoms as hydrogen atoms.

Claim 5

The coating composition of claim 1 in which the fluorinated alcohol is selected from the group consisting of 1H, 1H, 7H, dodecafluoro-1-heptanol and 4-perfluoroisopropoxy-3,3,4,4-tetrafluoro-1-butanol.

Claim 6

The coating composition of claim 1 in which the polyvinyl acetal is polyvinyl butyral.

Claim 7

The coating composition of claim 1 in which the SiO 2 to resin weight ratio is from 2:1 to 4:1.

Claim 8

The coating composition of claim 1 in which the resin to alcohol weight ratio is from 1:1 to 10:1.

Claim 9

The coating composition of claim 1 in which the polyvinyl acetal is a polyvinyl butyral having an hydroxyl content, calculated as polyvinyl alcohol, of from 35 to 50 percent by weight.

Claim 10

A coating composition suitable for application to a substrate which coating composition comprises a polyvinyl butyral resin, a fluorinated alcohol, having from 6 to 8 carbon atoms and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated at SiO 2 , to resin is from 2:1 to 4:1 and in which the ratio by weight of resin to alcohol is from 1:1 to 10:1.

Claim 11

A coating composition suitable for application to a substrate which coating composition comprises a polyvinyl butyral resin, a fluorinated alcohol, having from 6 to 8 carbon atoms and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated at SiO 2 , to resin is from 2:1 to 4:1 and in which the ratio by weight of resin to alcohol is from 1:1 to 10:1.

Claim 12

The coating composition of claim 9 in which the fluorinated alcohol contains at least twice as many fluorine atoms as hydrogen atoms and in which the carbon atom bearing the hydroxyl group is not bonded directly to any fluorine atom.

Claim 13

A coating composition suitable for application to a substrate which coating composition comprises a polyvinyl butyral resin having a hydroxyl content, measured as polyvinyl alcohol, of from 35 to 50 percent by weight, a fluorinated alcohol selected from the group consisting of 1H, 1H, 7H dodecafluoro-1-heptanol and 4-perfluoroisopropoxyl-3,3,4,4-tetrafluoro-1-butanol, and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated as SiO 2 , to resin is from 2:1 to 4:1 and in which the ratio by weight of resin to alcohol is from 1:1 to 10:1.

Claim 14

A coating composition suitable for application to a substrate which coating composition comprises a polyvinyl butyral resin having a hydroxyl content, measured as polyvinyl alcohol, of from 35 to 50 percent by weight, a fluorinated alcohol selected from the group consisting of 1H, 1H, 7H dodecafluoro-1-heptanol and 4-perfluoroisopropoxyl-3,3,4,4-tetrafluoro-1-butanol, and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated as SiO 2 , to resin is from 2:1 to 4:1 and in which the ratio by weight of resin to alcohol is from 1:1 to 10:1.

Claim 15

A substrate coated with a coating composition according to claim 1.

Claim 16

A substrate coated with a coating composition according to claim 9.

Claim 17

A sheet of a transparent thermoplastic material coated with a coating composition comprising a polyvinyl acetal resin, a fluorinated aliphatic alcohol containing from 4 to 10 carbon atoms and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated as SiO 2 , to resin is from 1:1 to 5:1 and in which the ratio by weight of resin to alcohol is from 1:2 to 15:1.

Claim 18

A sheet of a transparent thermoplastic material coated with a coating composition comprising a polyvinyl acetal resin, a fluorinated aliphatic alcohol containing from 4 to 10 carbon atoms and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated as SiO 2 , to resin is from 1:1 to 5:1 and in which the ratio by weight of resin to alcohol is from 1:2 to 15:1.

Claim 19

A sheet of a transparent thermoplastic material coated with a coating composition comprising a polyvinyl butyral resin, a fluorinated alcohol selected from the group consisting of 1H, 1H, 7H dodecafluoro-1-heptanol and 4-perfluoroisopropoxy-3,3,4,4-tetrafluoro-1-butanol, and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated as SiO 2 , to resin is from 2:1 to 4:1 and in which the ratio by weight of resin to alcohol is from 1:1 to 10:1.

Claim 20

A sheet of a transparent thermoplastic material coated with a coating composition comprising a polyvinyl butyral resin, a fluorinated alcohol selected from the group consisting of 1H, 1H, 7H dodecafluoro-1-heptanol and 4-perfluoroisopropoxy-3,3,4,4-tetrafluoro-1-butanol, and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated as SiO 2 , to resin is from 2:1 to 4:1 and in which the ratio by weight of resin to alcohol is from 1:1 to 10:1.

Claim 21

A coated sheet according to claim 15 in which the polyvinyl butyral has an hydroxyl content, measured as polyvinyl alcohol, of from 35 to 50 percent by weight.

Claim 22

A coated sheet according to claim 14 in which the transparent thermoplastic material is selected from the group consisting of polycarbonate, polyester, polyacrylates, acrylonitrile polymers and cellulosic esters.

Claim 23

A laminate comprising a coated sheet according to claim 14.

Claim 24

A laminate comprising a coated sheet according to claim 15.

Claim 25

A laminate comprising in laminated sequence a glass sheet, an intermediate impact-resisting layer, a transparent thermoplastic sheet material and a coating composition comprising a polyvinyl butyral resin having a hydroxyl content, measured as polyvinyl alcohol, of from 35 to 50 percent by weight, a fluorinated alcohol selected from the group consisting of 1H, 1H, 7H dodecafluoro-1-heptanol and 4-perfluoroisopropoxy-3,3,4,4-tetrafluoro-1-butanol, and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated as SiO 2 , to resin is from 2:1 to 4:1 and in which the ratio by weight of resin to alcohol is from 1:1 to 10:1.

Claim 26

A laminate comprising in laminated sequence a glass sheet, an intermediate impact-resisting layer, a transparent thermoplastic sheet material and a coating composition comprising a polyvinyl butyral resin having a hydroxyl content, measured as polyvinyl alcohol, of from 35 to 50 percent by weight, a fluorinated alcohol selected from the group consisting of 1H, 1H, 7H dodecafluoro-1-heptanol and 4-perfluoroisopropoxy-3,3,4,4-tetrafluoro-1-butanol, and polysilicic acid, in which the ratio by weight of polysilicic acid, calculated as SiO 2 , to resin is from 2:1 to 4:1 and in which the ratio by weight of resin to alcohol is from 1:1 to 10:1.