ACRYLIC RUBBER COMPOSITION AND CROSS-LINKED PRODUCT THEREOF

• US 20120141711A1
• Filed: 08/18/2010
• Published: 06/07/2012
• Est. Priority Date: 08/20/2009
• Status: Active Grant

• Current Assignee: Denki Kagaku Kogyo Kabushiki Kaisha (TDK Corporation)
• Original Assignee: Denki Kagaku Kogyo Kabushiki Kaisha (TDK Corporation)
• Inventors: Miyauchi, Toshiaki, Yamagishi, Uichiro, Abe, Yasushi
• Granted Patent: US 8,658,737 B2
• Time in Patent Office: Days
• US Class Current: 428/36.9
• CPC Class Codes: C08L 33/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08L 83/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
• CPC Class Codes: Y10T 428/139 Open-ended, self-supporting conduit, cylinder, or tube-type article

Abstract

The present invention relates to an acrylic rubber composition that is unlikely to be deteriorated even when it is exposed to high temperature for a long time and that has excellent heat resistance and a cross-linked product of the composition.

Provided is an acrylic rubber composition including an acrylic rubber and a functionalized silicone oil. Here, the functionalized silicone oil preferably has a particular polydimethylsiloxane structure having at least one binding site bonded with at least one of a monoamino group, a diamino group, a polyether group, an epoxy group, an alicyclic epoxy group, a hydroxyl group, a thiol group, a carboxyl group, a hydrogen group (Si—H group), a methacryl group, a phenol group, an alkoxy group, an ester group, an amide group, an alkyl group, a fluoroalkyl group, and a diol group and has a functional group equivalent weight of 1 to 100,000 (g/mol).

Claims

1. An acrylic rubber composition characterized by comprising:

an acrylic rubber; and

a functionalized silicone oil,

the silicone oil is included in an amount of 0.3 to 30 parts by mass based on 100 parts by mass of the acrylic rubber.

2. The acrylic rubber composition according to claim 1, wherein the silicone oil has a polydimethylsiloxane structure represented by General Formula 1 and having at least one of binding sites α

, β

, and γ

bonded with a functional group and has a functional group equivalent weight of 1 to 100,000 (g/mol).

3. The acrylic rubber composition according to claim 1, wherein the acrylic rubber is a carboxyl group-containing acrylic rubber.

4. The acrylic rubber composition according to claim 1, wherein the acrylic rubber is an epoxy group-containing acrylic rubber.

5. The acrylic rubber composition according to claim 1, wherein the acrylic rubber is an active chlorine group-containing acrylic rubber.

6. The acrylic rubber composition according to claim 1 further comprising at least one compound of an aromatic polyamine and an aliphatic polyamine.

7. The acrylic rubber composition according to claim 6, wherein the aromatic polyamine is a compound represented by General Formula 19:

[C.23]

H₂N-Ph-M-Ph-NH₂ 

 

General Formula 19

(where M represents one of O, S, SO₂, CONH, and O—

R—

O—

R in O—

R—

O represents one of Ph, Ph-Ph, Ph-SO₂-Ph, (CH₂)m, Ph-CH₂—

C(CX₃)₂—

CH₂-Ph, and (CH₂)C(CH₃)2(CH₂). Ph represents a benzene ring. m is 3 to 5, X is H or F, and Ph is a benzene ring).

8. A cross-linked product composition obtained by vulcanization of the acrylic rubber composition according to claim 1.

9. A rubber hose comprising the cross-linked product composition according to claim 8.

10. A seal comprising the cross-linked product composition according to claim 8.

11. A rubber vibration isolator for an automobile comprising the cross-linked product composition according to claim 8.

12. A rubber tube comprising the cross-linked product composition according to claim 8.

13. An industrial belt comprising the cross-linked product composition according to claim 8.

14. An industrial rubber vibration isolator comprising the cross-linked product composition according to claim 8.

15. A wire covering rubber comprising the cross-linked product composition according to claim 8.

16. A boot material for an automobile comprising the cross-linked product composition according to claim 8.

17. The acrylic rubber composition according to claim 2, wherein the acrylic rubber is a carboxyl group-containing acrylic rubber.

18. The acrylic rubber composition according to claim 2, wherein the acrylic rubber is an epoxy group-containing acrylic rubber.

19. The acrylic rubber composition according to claim 2, wherein the acrylic rubber is an active chlorine group-containing acrylic rubber.