Fluororubber composition and molded article

Patent metadata

Field	Value
Publication number	US-12037428-B2
Application number	US-201917289872-A
Country	US
Kind code	B2
Filing date	Nov 1, 2019
Priority date	Nov 2, 2018
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

A fluoroelastomer composition containing (a) a polyol-crosslinkable fluoroelastomer, (b) a cross-linking agent for polyol crosslinking, (c) a crosslinking accelerator; and (d) at least one acid acceptor selected from basic magnesium carbonate and magnesium phosphate, wherein the content of a divalent metal oxide is lower than 1 part by mass with respect to 100 parts by mass of the fluoroelastomer (a). Also disclosed is a molded article obtained by crosslinking the fluoroelastomer composition.

First claim

The invention claimed is:

1. A fluoroelastomer composition, comprising:
(a) a polyol-crosslinkable fluoroelastomer;
(b) a cross-linking agent for polyol crosslinking;
(c) a crosslinking accelerator; and
(d) at least one acid acceptor selected from the group consisting of a basic magnesium carbonate and a magnesium phosphate,
wherein a content of a divalent metal oxide is less than 1 part by mass with respect to 100 parts by mass of the fluoroelastomer (a) and a content of the acid acceptor (d) is 2 to 40 parts by mass with respect to 100 parts by mass of the fluoroelastomer (a).

2. The fluoroelastomer composition according to claim 1 , wherein the fluoroelastomer composition comprises 0.5 to 15 parts by mass of the cross-linking agent for polyol crosslinking (b) with respect to 100 parts by mass of the fluoroelastomer (a).

3. The fluoroelastomer composition according to claim 1 , wherein the fluoroelastomer composition comprises 0.05 to 5 parts by mass of the crosslinking accelerator (c) with respect to 100 parts by mass of the fluoroelastomer (a).

4. The fluoroelastomer composition according to claim 1 , wherein the fluoroelastomer (a) comprises a vinylidene fluoride unit.

5. The fluoroelastomer composition according to claim 1 , wherein the magnesium phosphate is trimagnesium phosphate octahydrate.

6. The fluoroelastomer composition according to claim 1 , wherein a molded article obtained by crosslinking the fluoroelastomer composition has a hardness (a value after 3 sec) of 65 or higher as measured by a type-A durometer according to JIS K6253-3.

7. The fluoroelastomer composition according to claim 1 , wherein the fluoroelastomer composition is used for a hose.

8. A molded article obtained by crosslinking the fluoroelastomer composition according to claim 1 .

9. The molded article according to claim 8 , wherein the molded article is a hose contacting with a fluid comprising one or both of an organic acid and a carboxylate ester compound.

10. The molded article according to claim 8 , wherein the molded article is a member for a biodiesel fuel or a member for an air management system of an internal-combustion engine.

Assignees

• Daikin Ind Ltd

Inventors

• Kawasaki Kazuyoshi

Classifications

• F16L11/06

  with homogeneous wall (F16L11/11 takes precedence) · CPC title

• C08K2003/326

  Magnesium phosphate · CPC title

• C08K2003/267

  Magnesium carbonate · CPC title

• C08K13/02

  Organic and inorganic ingredients · CPC title

• C08K5/50

  Phosphorus bound to carbon only · CPC title