Sized short alumina-based inorganic oxide fiber, method of making, and composition including the same

Patent metadata

Field	Value
Publication number	US-9617659-B2
Application number	US-201314409206-A
Country	US
Kind code	B2
Filing date	Aug 9, 2013
Priority date	Aug 15, 2012
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

Sized short alumina-based inorganic oxide fiber comprises, based on the total weight of the sized short alumina-based inorganic oxide fiber: from 0.1 to 15 percent by weight of a size resin comprising a polyamide; and from 85 to 99.9 percent by weight of short alumina-based inorganic oxide fiber. Methods of making the sized short alumina-based inorganic oxide fiber and compositions comprising the sized short alumina-based inorganic oxide fiber in a polymeric matrix are also disclosed.

First claim

What is claimed is:

1. Sized short alumina-based inorganic oxide fiber comprising, based on the total weight of the sized short alumina-based inorganic oxide fiber:
from 0.1 to 15 percent by weight of a size resin comprising a polyamide, wherein the polyamide has a melting point of less than or equal to 160° C.; and
from 85 to 99.9 percent by weight of short alumina-based inorganic oxide fiber.

2. Sized short alumina-based inorganic oxide fiber according to claim 1 , wherein the polyamide comprises from 0.1 to 6 percent of the total weight of the sized short alumina-based inorganic oxide fiber.

3. Sized short alumina-based inorganic oxide fiber according to claim 1 , wherein the polyamide comprises an aliphatic polyamide.

4. Sized short alumina-based inorganic oxide fiber according to claim 1 , wherein the polyamide has a backbone comprising a polysiloxane segment.

5. Sized short alumina-based inorganic oxide fiber according to claim 1 , wherein the short alumina-based inorganic oxide fiber comprises at least 60 percent by weight of alumina.

6. Sized short alumina-based inorganic oxide fiber according to claim 5 , wherein the alumina comprises alpha alumina.

7. Sized short alumina-based inorganic oxide fiber according to claim 1 , wherein the short alumina-based inorganic oxide fiber further comprises a silicon oxide.

8. Sized short alumina-based inorganic oxide fiber according to claim 7 , wherein the short alumina-based inorganic oxide fiber further comprises a boron oxide.

9. Sized short alumina-based inorganic oxide fiber according to claim 1 , wherein the short alumina-based inorganic oxide fiber has a length of less than 25 millimeters.

10. A composition comprising sized short alumina-based inorganic oxide fiber dispersed in a polymeric matrix, wherein the sized short alumina-based inorganic oxide fiber comprises, based on the total weight of the sized short alumina-based inorganic oxide fiber:
from 0.1 to 15 percent by weight of a size resin comprising a first polyamide; and
from 85 to 99.9 percent by weight of short alumina-based inorganic oxide fiber, wherein the polymeric matrix comprises a second polyamide different from the first polyamide, and
wherein the composition is thermoplastic.

11. A composition according to claim 10 , wherein the first polyamide has a melting point of less than or equal to 160° C.

12. A composition according to claim 10 , wherein the second polyamide has a melting point of at least 180° C.

13. A composition according to claim 10 , wherein the size resin comprises from 0.1 to 6 percent of the total weight of the sized short alumina-based inorganic oxide fiber.

14. A composition according to claim 10 , wherein the short alumina-based inorganic oxide fiber comprises at least 60 percent by weight of alumina.

15. A composition according to claim 10 , wherein the short alumina-based inorganic oxide fiber has a length of less than 25 millimeters.

16. A method of making sized short alumina-based inorganic oxide fiber comprising:
combining an aqueous dispersion and continuous alumina-based inorganic oxide fiber to provide precursor sized continuous alumina-based inorganic oxide fiber;
at least partially drying the precursor sized continuous alumina-based inorganic oxide fiber to provide sized continuous alumina-based inorganic oxide fiber, wherein the continuous alumina-based inorganic oxide fiber comprises at least 60 percent by weight of alumina, and
converting the sized continuous alumina-based inorganic oxide fiber into the sized short alumina-based inorganic oxide fiber, wherein the aqueous dispersion comprises a polyamide, and wherein based on the total weight of the sized short alumina-based inorganic oxide fiber, the sized short alumina-based inorganic oxide fiber comprises:
from 0.1 to 15 percent by weight of the polyamide; and
from 85 to 99.9 percent by weight of the short alumina-based inorganic oxide fiber.

17. A method according to claim 16 , further comprising combining the continuous alumina-based inorganic oxide fiber with a silane coupling agent.

18. A method of making sized short alumina-based inorganic oxide fiber comprising:
combining an aqueous dispersion and short alumina-based inorganic oxide fiber to provide a precursor sized fiber;
at least partially drying the precursor sized fiber to provide the sized short alumina-based inorganic oxide fiber, wherein the aqueous dispersion comprises a polyamide, and wherein based on the total weight of the sized short alumina-based inorganic oxide fiber, the sized short alumina-based inorganic oxide fiber comprises:
from 0.1 to 15 percent by weight of the polyamide; and
from 85 to 99.9 percent by weight of the short alumina-based inorganic oxide fiber,

further comprising combining the short alumina-based inorganic oxide fiber with a silane coupling agent.

19. A method according to claim 18 , wherein the short alumina-based inorganic oxide fiber comprises at least 60 percent by weight of alumina.

Assignees

• 3M Innovative Properties Co
• 3M Innovative Properties Co

Inventors

• Dahlke Gregg D
• Wu Yong K
• Crandall Michael D
• Gunes Ibrahim S

Classifications

• C04B26/20

  Polyamides · CPC title

• C04B14/4625

  Alumina · CPC title

• C03C25/328

  Polyamides · CPC title

• C04B20/1037 Primary

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C04B20/1051

  Organo-metallic compounds; Organo-silicon compounds, e.g. bentone · CPC title