Perfluoroelastomeric compositions comprising oxazoles

Patent metadata

Field	Value
Publication number	US-10323142-B2
Application number	US-201615573848-A
Country	US
Kind code	B2
Filing date	May 5, 2016
Priority date	May 29, 2015
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

Described herein is a curable composition comprising: (a) a perfluoroelastomer gum having a carboxylic acid integrated absorbance ratio of at least 0.015; and (b) a compound comprising at least one oxazole moiety, and cured articles thereof.

First claim

What is claimed is:

1. A curable composition comprising:
(a) a perfluoroelastomer gum, comprising a perfluorinated polymer having an carboxylic acid integrated absorbance ratio of at least 0.015; and
(b) a compound comprising at least one oxazole moiety wherein the compound comprises at least two oxazole moieties.

2. The composition of claim 1 , wherein the compound is selected from the group consisting of: 1,3,-bis(4,5-dihydro-2-oxazolyl) benzene; and 1,4-bis(4,5-dihydro-2-oxazolyl) benzene.

3. The composition of claim 1 , wherein the composition is comprises less than 0.02 parts by weight of a metal and phosphorous per 100 parts by weight of the perfluorinated polymer.

4. The composition of claim 1 , further comprising a peroxide curing agent.

5. The composition of claim 4 , wherein the peroxide curing agent is selected from at least one of: benzoyl peroxide, dichlorobenzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, di-t-butyl peroxide, t-butylperoxy benzoate, and 2,5-dimethyl-2,5-di(t-butylperoxy)hexane-3, and lauroyl peroxide.

6. The composition of claim 4 , further comprising a co-agent selected from at least one of 1,3,5-triallyl isocyanurate (TAIC), 1,3,5-trimethallyl isocyanurate (TMAIC).

7. A cured article comprising the composition of claim 1 .

8. The cured article according to claim 7 , wherein the cured article is a hose, a gasket, or a seal.

9. The composition of claim 1 , wherein the perfluorinated polymer comprises interpolymerized units derived from monomers selected from tetrafluoroethylene, hexafluoropropylene, perfluoroalkylvinyl ethers, and perfluoroalkyl allyl ethers.

10. The composition of claim 1 , wherein the perfluorinated polymer comprises a cure site selected from at least one of bromine, iodine, and nitrile.

11. The composition of claim 1 , further comprising an inorganic filler selected from at least one of carbon black, graphite, clay, silica, talc, diatomaceous earth, titanium oxide, and calcium carbonate.

12. A method of curing a perfluoroelastomer gum comprising:
(a) providing a mixture comprising (i) a perfluoroelastomer gum comprising a perfluorinated polymer having a carboxylic acid integrated absorbance ratio of at least 0.015; and (ii) a compound comprising at least two oxazole moieties; and
(b) reacting the mixture with a curing agent.

13. The method of claim 12 , wherein the perfluoroelastomer gum comprises less than 0.02 parts by weight of a metal and phosphorous per 100 parts by weight of the perfluorinated polymer.

14. The method of claim 12 , wherein the compound is selected from the group consisting of: 1,3,-bis(4,5-dihydro-2-oxazolyl) benzene; and 1,4-bis(4,5-dihydro-2-oxazolyl) benzene.

15. The method of claim 12 , wherein the perfluorinated polymer comprises interpolymerized units derived from monomers selected from tetrafluoroethylene, hexafluoropropylene, perfluoroalkylvinyl ethers, and perfluoroalkyl allyl ethers.

16. The method of claim 12 , wherein the curing agent is a peroxide.

17. The method of claim 16 , wherein the peroxide curing agent is selected from at least one of: benzoyl peroxide, dichlorobenzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, di-t-butyl peroxide, t-butylperoxy benzoate, and 2,5-dimethyl-2,5-di(t-butylperoxy)hexane-3, and lauroyl peroxide.

18. The method of claim 16 further comprising a co-agent selected from at least one of 1,3,5-triallyl isocyanurate (TAIC), 1,3,5-trimethallyl isocyanurate (TMAIC).

19. The method of claim 12 , further comprising an inorganic filler selected from at least one of carbon black, graphite, clay, silica, talc, diatomaceous earth, titanium oxide, and calcium carbonate.

20. The method of claim 12 , wherein the perfluorinated polymer comprises a cure site selected from at least one of bromine, iodine, and nitrile.

Assignees

• 3M Innovative Properties Co

Inventors

• Aoki Tamon
• Fukushi Tatsuo
• Suzuki Yuta
• Usami Noriyuki

Classifications

• C08K5/353 Primary

  Five-membered rings · CPC title

• C08K5/14

  Peroxides · CPC title

• C08K2003/265

  Calcium, strontium or barium carbonate · CPC title

• C08K2201/019

  the composition being defined by the absence of a certain additive · CPC title

• C08K5/34924

  containing cyanurate groups; Tautomers thereof · CPC title