Alkali-metal titanate and friction material

Patent metadata

Field	Value
Publication number	US-10156277-B2
Application number	US-201615578806-A
Country	US
Kind code	B2
Filing date	Apr 28, 2016
Priority date	Jun 2, 2015
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

Provided is an alkali-metal titanate in which the content and adhesivity of the fibrous potassium titanate is significantly reduced.
The alkali-metal titanate includes 0.5 mol to 2.2 mol of potassium oxide in terms of potassium atoms, 0.05 mol to 1.4 mol of sodium oxide in terms of sodium atoms, and 0 mol to 1.4 mol of lithium oxide in terms of lithium atoms relative to 1 mol of alkali-metal hexatitanate, in which a total content of potassium oxide in terms of potassium atoms, sodium oxide in terms of sodium atoms, and lithium oxide in terms of lithium atoms relative to 1 mol of alkali-metal hexatitanate is 1.8 mol to 2.3 mol; and the alkali-metal titanate has a single phase conversion ratio of 85% to 100%, a fiber ratio of 0% by volume to 10% by volume, and a moisture content of 0% by mass to 1.0% by mass.

First claim

The invention claimed is:

1. An alkali-metal titanate comprising:
0.5 mol to 2.2 mol of potassium oxide in terms of potassium atoms,
0.05 mol to 1.4 mol of sodium oxide in terms of sodium atoms, and
0 mol to 1.4 mol of lithium oxide in terms of lithium atoms
relative to 1 mol of alkali-metal hexatitanate, wherein
a total content of potassium oxide in terms of potassium atoms, sodium oxide in terms of sodium atoms, and lithium oxide in terms of lithium atoms relative to 1 mol of alkali-metal hexatitanate is 1.8 mol to 2.3 mol; and
the alkali-metal titanate has a single phase ratio of 85% to 100%, a fiber ratio of 0% by volume to 10% by volume, and a moisture content of 0% by mass to 1.0% by mass.

2. The alkali-metal titanate according to claim 1 , wherein
the alkali-metal titanate comprises
0.9 mol to 2.2 mol of potassium oxide in terms of potassium atoms,
0.05 mol to 1.1 mol of sodium oxide in terms of sodium atoms, and
0 mol to 0.2 mol of lithium oxide in terms of lithium atoms
relative to 1 mol of alkali-metal hexatitanate, and
the alkali-metal titanate has a fiber ratio of 0% by volume to 7.0% by volume and a moisture content of 0% by mass to 0.8% by mass.

3. The alkali-metal titanate according to claim 1 , wherein
the alkali-metal titanate comprises
1.2 mol to 2.2 mol of potassium oxide in terms of potassium atoms;
0.05 mol to 0.8 mol of sodium oxide in terms of sodium atoms; and
0 mol of lithium oxide in terms of lithium atoms
relative to 1 mol of alkali-metal hexatitanate;
the total content of potassium oxide in terms of potassium atoms, sodium oxide in terms of sodium atoms, and lithium oxide in terms of lithium atoms relative to 1 mol of alkali-metal hexatitanate is 1.9 mol to 2.2 mol; and
the alkali-metal titanate has a fiber ratio of 0% by volume to 5.0% by volume and a moisture content of 0% by mass to 0.6% by mass.

4. A friction material comprising the alkali-metal titanate as claimed in claim 1 .

5. The alkali-metal titanate according to claim 2 , wherein
the alkali-metal titanate comprises
1.2 mol to 2.2 mol of potassium oxide in terms of potassium atoms;
0.05 mol to 0.8 mol of sodium oxide in terms of sodium atoms; and
0 mol of lithium oxide in terms of lithium atoms
relative to 1 mol of alkali-metal hexatitanate;
the total content of potassium oxide in terms of potassium atoms, sodium oxide in terms of sodium atoms, and lithium oxide in terms of lithium atoms relative to 1 mol of alkali-metal hexatitanate is 1.9 mol to 2.2 mol; and
the alkali-metal titanate has a fiber ratio of 0% by volume to 5.0% by volume and a moisture content of 0% by mass to 0.6% by mass.

6. A friction material comprising the alkali-metal titanate as claimed in claim 2 .

7. A friction material comprising the alkali-metal titanate as claimed in claim 3 .

8. A friction material comprising the alkali-metal titanate as claimed in claim 5 .

Assignees

• Toho Titanium Co Ltd

Inventors

• Nakashima Mamoru
• Sakai Hideki
• Taki Daisuke

Classifications

• F16D2200/006

  containing fibres or particles · CPC title

• C01G23/00

  Compounds of titanium {(preparation of Ti-compounds from ores or scraps C22B34/12)} · CPC title

• F16D65/092

  for axially-engaging brakes, e.g. disc brakes · CPC title

• C09K3/14

  Anti-slip materials; Abrasives {(products specifically intended for the fabrication of abrasive tools, blocks or papers, or for operations of the kind of sand-blasting and barrelling B24B31/14, B24C1/00; polishing compositions containing abrasive or grinding agents C09G1/02; friction compositions for brakes or clutches F16D69/02; polishing of semi-conductors H10P52/40)} · CPC title

• F16D2200/0065

  Inorganic, e.g. non-asbestos mineral fibres · CPC title