USPatentGranted
B2Nitrile rubbers
Granted 22 Oct 2013 · 6 office actions
Current assignee: ARLANXEO Deutschland GmbH · originally Lanxess
Law firm: Law firm · Log in to unlock
Attorney: Attorney · Log in to unlock
Inventors: Werner Obrecht · Examiner: Robert C Boyle · AU 1764 · TC 1700
Application
12/038,861
filed 28 Feb 2008
Publication
US 20080293869
published 27 Nov 2008
Patent· this page
US 8,563,659
granted 22 Oct 2013
46
Claims
7 independent
94
File wrapper
transactions
2028
20-year term
term adjustment not held
none
Litigation
checked
15
Classifications
C08F236/12, C08F36/02
47
Citations
47 cites · 0 cited by
Life of the patent
3 dated events⤢ drag to zoom
Prosecutionhover for detail · click to open
Abstract
An improved polymerization and work-up process makes it possible to produce specific nitrile rubbers which have a particular ion index which is responsible for an excellent vulcanization rate and leads to vulcanizates having an advantageous property profile.
Claims
46 · 7 independent · depth 446 granted claims
›1.independentA nitrile rubber comprising repeating units of at least one α,β-unsaturated nitrile and at least one conjugated diene and having an ion index (“II…+11
›2.↳ 1The nitrile rubber according to claim 1 having an ion index in the range from 8 to 26 ppm×mol/g.d2
›3.↳ 1The nitrile rubber according to claim 1 having repeating units of acrylonitrile, 1,3-butadiene.d2+2
›4.↳ 3The nitrile rubber according to claim 3 having repeating units of one or more α,β-unsaturated monocarboxylic or dicarboxylic acids, their esters or am…d3+1
›5.↳ 4The nitrile rubber according to claim 4 having repeating units of an alkyl ester of an α,β-unsaturated carboxylic acid.d4
›6.↳ 1The nitrile rubber according to claim 1 which has a Mooney viscosity (ML (1+4 @ 100° C.)) of from 10 to 150 Mooney units.d2
›7.↳ 1The nitrile rubber according to claim 1 which has a Mooney viscosity (ML (1+4 @ 100° C.)) of from 20 to 100 Mooney units.d2
›8.↳ 1The nitrile rubber according to claim 1 having a glass transition temperature in the range from −70° C. to +10° C.d2
›9.↳ 1The nitrile rubber according to claim 1 having a glass transition temperature in the range from −60° C. to 0° C.d2
›39.↳ 1A vulcanizable mixture comprising at least one nitrile rubber according to claim 1, at least one crosslinker and optionally further additives.d2+2
›41.↳ 39A process for producing a vulcanizable mixture according to claim 39 by mixing at least one nitrile rubber comprising repeating units of at least one …d3
›42.↳ 39A process for producing a vulcanizable mixture according to claim 39 by mixing at least one hydrogenated nitrile rubber comprising repeating units of …d3
›10.independentA process for producing a nitrile rubber, comprising:nemulsion polymerization of at least one α,β-unsaturated nitrile and at least one conjugated di…+27
›11.↳ 10The process according to claim 10, wherein the emulsion polymerization is carried out batchwise or continuously in a cascade of stirred vessels.d2
›12.↳ 10The process according to claim 10, wherein one or more ageing inhibitors are added before or during the coagulating step.d2
›13.↳ 10The process according to claim 10, wherein the at least one salt of a monovalent metal comprises at least one salt of sodium or potassium.d2
›14.↳ 10The process according to claim 10, wherein at least one halide of a monovalent metal is used for coagulation of the latex during the coagulating step.d2+1
›15.↳ 14The process according to claim 14, wherein the at least one halide is sodium chloride or potassium chloride.d3
›16.↳ 10The process according to claim 10, wherein the at least one salt of a monovalent metal comprises at least one nitrate of monovalent metal.d2+1
›17.↳ 16The process according to claim 16, wherein the at least one nitrate is sodium nitrate or potassium nitrate.d3
›18.↳ 10The process according to claim 10, wherein the at least one salt of a monovalent metal comprises at least one sulphate of a monovalent metal.d2+1
›19.↳ 18The process according to claim 18, wherein the at least one sulphate is a sodium sulphate or potassium sulphate.d3
›20.↳ 10The process according to claim 10, wherein the at least one salt of a monovalent metal comprises at least the salt of a monovalent metal cation and a …d2
›21.↳ 10The process according to claim 10, wherein the at least one salt of a monovalent metal comprises a mixture of two or more salts of a monovalent metal,…d2
›22.↳ 10The process according to claim 10, wherein the at least one divalent metal is present during the coagulating step.d2
›23.↳ 10The process according to claim 10, wherein the at least one salt of a monovalent metal comprises sodium chloride and potassium chloride and, wherein t…d2
›24.↳ 10The process according to claim 10, wherein the at least one salt of a monovalent metal is present in the amount of 1-200 parts by weight.d2+1
›25.↳ 24The process according to claim 24, wherein the amount of the salt or salts of the monovalent metal is 5-150 parts by weight.d3
›26.↳ 10The process according to claim 10, wherein the at least one salt of a monovalent metal is present in the amount of 10-100 parts by weight, per 100 par…d2
›27.↳ 10The process according to claim 10, wherein the latex used for the coagulating step has a solids concentration in the range from 1% to 40% by weight.d2+2
›28.↳ 27The process according to claim 27, where in the latex used for the coagulating step has a solids concentration in the range from 5% to 35% by weight.d3+1
›29.↳ 28The process according to claim 28, wherein the latex used for the coagulating step has a solids concentration in the range from 15 to 30% by weight.d4
›30.↳ 10The process according to claim 10, wherein the coagulating step is carried out at a temperature in the range from 50 to 100° C.d2+2
›31.↳ 30The process according to claim 30, wherein the coagulating step is carried out at a temperature range from 55 to 90° C.d3+1
›32.↳ 31The process according to claim 31, wherein the coagulating step is carried out at a temperature range from 60 to 90° C.d4
›33.↳ 10The process according to claim 10, wherein the latex and the solution of at least one salt of a monovalent metal are firstly combined at a temperature…d2
›34.↳ 10The process according to claim 10, wherein deionized water (“DW†) or water which has not been deionized (“BW†) is used for washing of the coag…d2
›35.↳ 10The process according to claim 10, wherein the washing step is carried out at a temperature in the range from 50 to 90° C.d2+1
›36.↳ 35The process according to claim 35, wherein the washing step is carried out at a temperature in the range from 55 to 90° C.d3
›37.↳ 10The process according to claim 10, wherein the obtained nitrile rubber is subsequently subjected either (i) to a metathetic degradation reaction, (ii)…d2
›38.independentA hydrogenated nitrile rubber prepared by a process comprising polymerizing, by emulsion polymerization, at least one α,β-unsaturated nitrile and at…+1
›40.↳ 38A vulcanizable mixture comprising at least one nitrile rubber according to claim 38, at least one crosslinker and optionally further additives.d2
›43.independentA process for producing mouldings comprising vulcanizing nitrile rubber comprising repeating units of at least one α,β-unsaturated nitrile, at least…
›44.independentA process for producing mouldings comprising vulcanizing a hydrogenated nitrile rubber comprising repeating units of at least one α,β-unsaturated ni…
›45.independentA moulding obtained by a process comprising moulding a nitrile rubber, wherein said nitrile rubber is formed by polymerizing, via emulsion polymerizat…
›46.independentA moulding obtained by the process comprising vulcanizing, in a shaping process, a hydrogenated nitrile rubber comprising repeating units of at least …
Classifications
15 codesIPC · International Patent Classification
Section C — Chemistry; metallurgy
- C08F236/12
- C08F36/02
USPC · US Patent Classification
525/329.3525/333.2525/329.2525/332.5526/224524/439525/366525/367526/222525/331.9525/329.1525/360524/436
Claim changes
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Pendency
5.6 y
2,063 days filing → grant
Office actions
3
after a restriction
Responses
2
2 RCE
Examiner
Robert C Boyle
art unit 1764 · TC 1700
Law firm
Citations: 47 back · 0 forward
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1 priority documents›Priority documents — 1
| Type | Document | Date |
|---|---|---|
| related publication | US 20080293869 A1 | 27 Nov 2008 |
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