Mineral wool

Patent metadata

Field	Value
Publication number	US-12559419-B2
Application number	US-201917276840-A
Country	US
Kind code	B2
Filing date	Sep 23, 2019
Priority date	Sep 26, 2018
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A mineral wool having a chemical composition comprising the following constituents, as percentages by weight:

SiO 2
39-50% 

Al 2 O 3
19.5-27%  

CaO
5-12%

MgO
 1-5%

Na 2 O
5-20%

K 2 O
0-15%

Fe 2 O 3
2-15%

B 2 O 3
 0-2%

a MgO/RO weight ratio of more than 0.10 and less than 0.50, and
a RO/(RO+R 2 O) weight ratio of less than 0.55,
in which RO represents the alkaline earth oxides CaO, MgO, BaO and SrO, and
R 2 O represents the alkali oxides Na 2 O and K 2 O.

First claim

The invention claimed is:

1 . A mineral wool having a chemical composition comprising the following constituents, as percentages by weight:

SiO 2
39-50%; 

Al 2 O 3
19.5-27%;  

CaO
5-12%;

MgO
 1-5%;

Na 2 O
5-20%;

K 2 O
0-15%;

Fe 2 O 3
      2-15%; and

B 2 O 3
0-2%%;

wherein the composition has a MgO/RO weight ratio of 0.12 to 0.30 and a RO/(RO+R 2 O) weight ratio of less than 0.55 0.50, wherein RO represents the alkaline earth oxides CaO, MgO, BaO, and SrO, and R 2 O represents the alkali oxides Na 2 O and K 2 O.

2 . The mineral wool as claimed in claim 1 , wherein the R 2 O content is more than 12%.

3 . The mineral wool as claimed in claim 1 , wherein the composition comprises 0 to 0.20% of BaO.

4 . The mineral wool as claimed in claim 1 , wherein the SiO 2 content is from 39% to 48%.

5 . The mineral wool as claimed in claim 1 , wherein the Al 2 O 3 content is from 21% to 26%.

6 . The mineral wool as claimed in claim 1 , wherein the CaO content is from 8% to 10%.

7 . The mineral wool as claimed in claim 1 , wherein the MgO content is from 3% to 4%.

8 . The mineral wool as claimed in claim 1 , wherein the content of Na 2 O is from 8% to 10%.

9 . The mineral wool as claimed in claim 1 , wherein the K 2 O content is from 3% to 5%.

10 . The mineral wool as claimed in claim 1 , wherein the Fe 2 O 3 content is from 6% to 8%.

11 . A thermal and/or acoustic insulation product, comprising the mineral wool as claimed in claim 1 .

12 . The mineral wool as claimed in claim 1 , wherein the composition has a RO/(RO+R 2 O) weight ratio from 0.15 to 0.48.

13 . The mineral wool as claimed in claim 1 , wherein the composition has a RO/(RO+R 2 O) weight ratio from 0.20 to 0.48.

14 . A fire resistant construction system comprising the mineral wool as claimed in claim 1 .

15 . The mineral wool as claimed in claim 1 , wherein the composition has a RO/(RO+R 2 O) weight ratio of 0.48 or less.

16 . The mineral wool as claimed in claim 1 , wherein said mineral wool does not comprise a phosphorous-containing compound.

17 . The mineral wool as claimed in claim 1 , wherein said mineral wool has a fiberizing range of more than 40° C.

18 . A thermal and/or acoustic insulation product, comprising the mineral wool as claimed in claim 16 .

19 . A fire resistant construction system comprising the mineral wool as claimed in claim 16 .

Assignees

• Saint Gobain Isover

Inventors

• Claireaux Corinne

Classifications

• C03C2213/00

  Glass fibres or filaments · CPC title

• C03C3/087 Primary

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• C03C3/091

  containing aluminium · CPC title

• C03C13/06 Primary

  Mineral fibres, e.g. slag wool, mineral wool, rock wool · CPC title

• C03C3/097

  containing phosphorus, niobium or tantalum · CPC title