USE OF VULCANIZABLE COMPOSITIONS AND VULCANIZATES IN CONTACT WITH COOLANT, COMPRISING SILANE-COATED WOLLASTONITE

• US 20200131349A1
• Filed: 05/31/2017
• Published: 04/30/2020
• Est. Priority Date: 06/07/2016
• Status: Abandoned Application

• Current Assignee: Arlanxeo Deutschland GmbH (Government of Saudi Arabia)
• Original Assignee: Arlanxeo Deutschland GmbH (Government of Saudi Arabia)
• Inventors: FRENZEL, Ulrich, LIEBER, Susanna
• Application Number:
  US16/305,249
• Publication Number:
  US 20200131349A1
• Time in Patent Office: Days
• CPC Class Codes: B29C 2035/1616 using liquids
• CPC Class Codes: B29C 35/16 Cooling cooling extruded material B29C48/911; cooling preforms for blow moulding B29C49/6427; cooling blown articles B29C49/66; cooling tyres during post cure inflation B29D30/0643
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08K 5/14 Peroxides
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: C08L 15/005 Hydrogenated nitrile rubber
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers
• CPC Class Codes: C08L 23/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: C08L 9/02 Copolymers with acrylonitrile

Abstract

The present invention relates to a process for producing a vulcanizate which is in contact with coolant and to the use of a vulcanizable composition comprising rubber, silane-coated wollastonite and peroxide compound for production of vulcanizates in contact with coolant.

The invention further relates to a process for production and to the use of a vulcanizate produced from a vulcanizable composition comprising rubber, silane-coated wollastonite and peroxide compound as a component part, preferably as a seal or as a hose, in contact with coolant.

Claims

1. A process for producing a vulcanizate for use in contact with coolant, the process comprising vulcanizing a vulcanizable composition comprising:

(a) at least one rubber,

(b) at least one silane-coated wollastonite, and

(c) at least one peroxide compound.

2. The process according to claim 1, wherein the at least one rubber (a) is at least one hydrogenated nitrile rubber comprising a fully or partly hydrogenated co- or terpolymer based on at least one conjugated diene and at least one α

,β

-unsaturated nitrile monomer and optionally further copolymerizable monomers.

3. The process according to claim 1, wherein the at least one rubber (a) is at least one hydrogenated nitrile rubber having a Mooney viscosity (ML 1+4@100°

C.) of 10 to 120 MU, where the Mooney viscosity is determined according to ASTM Standard D1646.

4. The process according to claim 1, wherein the composition comprises 35 to 150 parts by weight of the at least one silane-coated wollastonite (b), based on 100 parts by weight of the rubbers (a).

5. The process according to claim 1, wherein the at least one peroxide compound (c) is an organic peroxide.

6. The process according to claim 1, at least one filler which is a carbon black or a mineral filler.

7. The process according to claim 1, further comprising at least one ageing stabilizer selected from the group consisting of diphenylamine, mercaptobenzimidazole, substituted phenols and mixtures thereof.

8. The process according to claim 1, wherein the composition comprises:

(a) 100 parts by weight of the at least one rubber,

(b) 35 to 150 parts by weight of at least one silane-coated wollastonite

(c) 1 to 20 parts by weight of the at least one peroxide compound, and

(d) 0 to 100 parts by weight, of one or more customary rubber additives.

9. The process according to claim 1, wherein the vulcanizable composition comprises;

(a) 100 parts by weight of at least one of hydrogenated nitrile rubber and EPDM,

(b) 50 to 100 parts by weight of at least one vinylsilane-coated wollastonite,

(c) 2 to 10 parts by weight, of at least one organic peroxide, and

(d) 1 to 80 parts by weight, of one or more customary rubber additives, based on 100 parts by weight of the rubbers (a),

where the composition has a content of zinc ions that is less than 1.5 parts by weight based on 100 parts by weight of the rubbers (a).

12. A process for producing a component in contact with coolant, the process comprising vulcanizing the vulcanizable composition as defined in claim 110 to produce a vulcanized component, and contacting the component with coolant.

13. The process according to claim 12, wherein the component is a hose, a heating hose, a cooling hose, a seal, or a cooling seal.

14. The process according to claim 12, wherein the coolant comprises water, a freezing point depressant, and a corrosion inhibitor.

16. The process according to claim 14, wherein the freezing point depressant is ethylene glycol or propylene glycol, and the corrosion inhibitor Is sodium ethylhexanoate.

17. The process according to claim 1, wherein the composition comprises:

100 parts by weight of at least one fully or partly hydrogenated nitrile rubber comprising a fully or partly hydrogenated co- or terpolymer based on at least one conjugated diene and at least one α

,β

-unsaturated nitrile monomer, and having a Mooney viscosity of 15 to 100 MU (ML1+4)@100°

C.;

50 to 100 parts by weight of at least one silane-coated wollastonite selected from the group consisting of epoxysilane-coated wollastonite, methacryloylsilane-coated wollastonite, and vinylsilane-coated wollastonite;

2 to 10 parts by weight, of at least one organic peroxide selected from the group consisting of dicumyl peroxide, t-butyl cumyl peroxide, bis(t-butylperoxysopropyl)benzene, di-t-butyl peroxide, 2,5-dimethylhexane 2,5-dihydroperoxide, 2,5-dimethythex-3-yne 2,5-dihydroperoxide, dibenzoyl peroxide, bis(2,4-dichlrobenzoyl) peroxide, t-butyl perbenzoate, butyl 4,4-di(t-butylperoxy)valerate and 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane; and

1 to 80 parts by weight, of one or more rubber additives selected from the group consisting of;

filers selected from the group consisting of carbon black, silica, magnesium oxide, aluminium oxide,

filler-activators based on an organic silane,

ageing stabilizers selected from the group consisting of oligomerized 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ), styrenized diphenylamine (DDA), octylated diphenylamine (OCD), cumylated diphenylamine (CDPA), zinc salt of 4- and 5-methylmercaptobenzimidazole (Vulkanox ZMB2), and zinc salt of 4- and 5-methylmercaptobenzimidazole,

mould release agents, and

processing aids,

based on 100 parts by weight of the rubbers (a), and

the composition is free of zinc ions.

10. A vulcanizable composition comprising;

(a) 100 parts by weight of hydrogenated nitrile rubber,

(b) 50 to 85 parts by weight of an epoxysilane-, methacryloylsilane- or vinylsilane-coated wollastonite or mixtures thereof, and

(c) 2 to 10 parts by weight of at least one peroxide compound, and

the composition has a zinc ion content of less than 1.5 parts by weight based on 100 parts by weight of the rubbers (a).

11. A component part comprising a vulcanizate usable in contact with a coolant, the vulcanizate comprising a vulcanizable composition comprising:

(a) at least one rubber,

(b) at least one silane-coated wollastonite, and

(c) at least one peroxide compound.

15. A cooling unit comprising:

(i) at least one component according to claim 11, and

(ii) coolant,

wherein the at least one vulcanizate is in contact with the coolant ii).