Additive for friction coating mixtures

Claim 2

An additive composition for controlling friction and abrasion in an asbestos free brake pad comprising a sufficient amount of TiS 2 , a sulfide of a member of the second subgroup of the Periodic Table, a phosphate of magnesium, calcium, boron, aluminum, copper or iron, and synthetic graphite.

Claim 3

An additive according to claim 1 wherein the sulfide is ZnS having a Wurzite structure and the phosphate is Ca 3 (PO 4 ) 2 .

Claim 4

An additive in accordance with claim 1 further comprising a mixture of the following components: ______________________________________ 5-30 weight percent TiS.sub.2 10-30 weight percent ZnS (Wurtzite structure) 5-30 weight percent Ca.sub.3 (PO.sub.4).sub.2 10-80 weight percent synthetic graphite. ______________________________________

Claim 5

An additive as set forth in claim 3 wherein the mixture contains: ______________________________________ 10 to 15 weight percent TiS.sub.2 10-30 weight percent ZnS (Wurtzite structure) 10-15 weight percent Ca.sub.3 (PO.sub.4).sub.2 40-70 weight percent synthetic graphite. ______________________________________

Claim 6

The additive in accordance with claim 4 wherein the mixture contains: ______________________________________ 8-12% weight percent TiS.sub.2 20-25% ZnS (Wurtzite structure) 8-12 weight percent Ca.sub.3 (PO.sub.4).sub.2 51-64 weight percent synthetic graphite. ______________________________________

Claim 9

The method of claim 6 wherein there is further added to the brake pad a sulfide of a member of the second subgroup of the Periodic Table, a phosphate of magnesium, boron, aluminum, copper or iron, and synthetic graphite.

Claim 10

The method of claim 5 wherein the sulfide is ZnS having a Wurtzite structure and the phosphate is Ca 3 (PO4) 2 .

Claim 11

In a brake pad, the improvement comprising controlling friction and abrasion by introducing an additive into the mixture for making said brake pad which mixture is asbestos free and which additive contains TiS 2 .

Claim 12

In a brake pad, the improvement comprising controlling friction and abrasion by introducing an additive into the mixture for making said brake pad which mixture is asbestos free and which additive contains TiS 2 .

Claim 13

In the brake pad according to claim 9 which additive further contains a sulfide of a member of the second subgroup of the Periodic Table, a phosphate of magnesium, calcium, borium, aluminum, copper or iron and synthetic graphite.

Claim 14

In the brake pad of claim 9 wherein the sulfide is ZnS having a Wurtzite structure and the phosphate is Ca 3 (PO 4 ) 2 .

Claim 15

In the brake pads according to claim 9 wherein the additive has the following composition: ______________________________________ 5-30 weight percent TiS.sub.2 10-30 weight percent ZnS (Wurtzite structure) 5-30 weight percent Ca.sub.3 (PO.sub.4).sub.2 10-80 weight percent synthetic graphite. ______________________________________

Claim 16

In the brake pads according to claim 9 wherein the additive has the following composition: ______________________________________ 10- 15 weight percent TiS.sub.2 10-30 weight percent ZnS (Wurtizite structure) 10-15 weight percent Ca.sub.3 (PO.sub.4).sub.2 40-70 weight percent synthetic graphite. ______________________________________

Claim 17

In the brake pads according to claim 9 wherein the additive has the following composition: ______________________________________ 8-12 weight percent TiS.sub.2 20-25 weight percent ZnS (Wurtzite structure) 8-12 weight percent Ca.sub.3 (PO.sub.4).sub.2 51-64 weight percent synthetic graphite.

Claim 18

An asbestos free brake pad comprising as an additive to control friction and abrasion TiS 2 and a brake pad binder free of asbestos.

Claim 19

An asbestos free brake pad comprising as an additive to control friction and abrasion TiS 2 and a brake pad binder free of asbestos.

Claim 20

The asbestos free bake pad according to claim 15 wherein said additive contains as additional components a sulfide of a member of the second subgroup of the Periodic Table, a phosphate of magnesium, calcium, boron, aluminum, copper or iron, and synthetic graphite.

Claim 21

The asbestos free brake pad according to claim 15 wherein said binder comprises a resin.

Claim 22

The asbestos free brake pad according to claim 17 wherein the resin is a phenolic resin.

Claim 23

The asbestos free brake pad according to claim 16 wherein the sulfide is ZnS having a Wurtzite structure and the phosphate is Ca 3 (PO 4 ) 2 .

Claim 24

The asbestos free brake pad according to claim 15 which comprises the mixture of the following component: ______________________________________ 5-30 weight percent TiS.sub.2 10-30 weight percent ZnS (Wurtzite structure) 5-30 weight percent Ca.sub.3 (PO.sub.4).sub.2 10-80 weight percent synthetic graphite. ______________________________________

Claim 25

The asbestos free brake pad according to claim 15 which comprises the mixture of the following component: ______________________________________ 10 to 15 weight percent TiS.sub.2 10-30 weight percent ZnS (Wurtzite structure) 10-15 weight percent Ca.sub.3 (PO.sub.4).sub.2 40-70 weight percent synthetic graphite. ______________________________________

Claim 26

The asbestos free brake pad according to claim 21 which comprises the mixture of the following component: ______________________________________ 8-12 weight percent TiS.sub.2 20-25 weight percent ZnS (Wurtzite structure) 8-12 weight percent Ca.sub.3 (PO.sub.4).sub.2 51-64 weight percent synthetic graphite.