EP0047736A4 - VULCANIZATION SYSTEM FOR THIODIETHANOL ELASTOMERS. - Google Patents

VULCANIZATION SYSTEM FOR THIODIETHANOL ELASTOMERS.

Info

Publication number
EP0047736A4
EP0047736A4 EP19800902074 EP80902074A EP0047736A4 EP 0047736 A4 EP0047736 A4 EP 0047736A4 EP 19800902074 EP19800902074 EP 19800902074 EP 80902074 A EP80902074 A EP 80902074A EP 0047736 A4 EP0047736 A4 EP 0047736A4
Authority
EP
European Patent Office
Prior art keywords
vulcanizable elastomer
accordance
elastomer composition
acid
structural units
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19800902074
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0047736A1 (en
Inventor
Rudolf Adolf Behrens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Cyanamid Co filed Critical American Cyanamid Co
Publication of EP0047736A1 publication Critical patent/EP0047736A1/en
Publication of EP0047736A4 publication Critical patent/EP0047736A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/34Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/06Sulfur
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/16Nitrogen-containing compounds
    • C08K5/17Amines; Quaternary ammonium compounds

Definitions

  • Elastomers based on the condensation of a major proportion of thiodiethanol with one or more aliphatic diols containing a sulfur-vulcanizable double bond, are described by Aloia, U.S. Patent 3,951,927; Chang et al., U.S. Patent 3,985,708; Chang, U.S. Patent 4,000,213; and Li et al., U.S. Patent 4,028,305, all of which are incorporated herein by reference.
  • elastomer In order for an elastomer to achieve commercial success, it must be vulcanizable to useful products with an efficient, practical vulcanization system. It is an object of the invention to rovide useful vulcanized products from thiodiethanol-based elastomers, and to provide elastomers exhibiting significantly improved aged properties, such as compression set.
  • the present invention provides a novel vulcanization system for thiodiethanol-based elastomers, comprising sulfur and an aliphatic linear, branched chain or cyclic polyethyleneamine, or mixture thereof, or a dissociable organic salt thereof. DESCRIPTION OF THE INVENTION
  • the aliphatic linear, branched chain or cyclic polyethyleneamines which are useful in the vulcanization system of the present invention range from relatively simple polyethyleneamines, which are represented by the formula:
  • n is an integer from 1 to about 10, to complex reaction products of ethylene dichloride and ammonia, which boil above the boiling point of diethylenetriamine (206.7°C), to dissociable organic salts of polyethyleneamines produced by reaction thereof with acids having a dissociation constant less than about 10 -3 , or mixtures of any of the above materials.
  • Polyethyleneamines representative of the above formula (1) include: ethylenediamine diethylenetriamine triethylenetetramine tetraethylenepentamine pentaethylenehexamine, and the like.
  • the complex polyethyleneamine reaction mixtures contain linear, branched chain and cyclic structures which include, for example, the following: H 2 N-CH 2 CH 2 -NH-CH 2 CH 2 -NH-CH 2 CH 2 -NH-CH 2 CH 2 -NH-CH 2 CH 2 -NH 2 CH 2 -NH 2 CH 2 -NH 2
  • Aminoethyl diperazinoethane In addition to the linear, branched chain and cyclic polyethyleneamines, organic salts thereof, which dissociate under vulcanization conditions to liberate the free amine, may also be used.
  • Useful organic salts are those which are formed from acids having a dissociation constant less than about 10 -3 , and including salts of aliphatic carboxylic acids, especially those of 2-18 carbon atoms, carbonic acid, carbamic acid and the like. Particularly useful salts are the fatty acid salts, e.g., the stearate. Useful salts also include the condensation products of polyethylene amines and the aforementioned fatty acids, for example stearic acid, such as diethylenetriamine-stearic acid condensate.
  • the vulcanizable thiodiethanol-based elastomers useful in the present invention are preferably those disclosed in the aforementioned patent to Aloia and Chang et al. (708).
  • the vulcanizable elastomers of thiodiethanol is a polymer represented by the formula: (II) H wherein comprises randomly alternating structural units selected from
  • R is one or more radicals remaining on removal of two hydroxyl groups from: (a) Saturated aliphatic, linear, branched chain or cyclic diols, or (b) aliphatic linear, branched chain or cyclic diols containing external unsatu ration having an allylic hydrogen atom, wherein R' is one or more radicals which remain on removal of two hydroxyl groups from a diphenolic compound, said polymers comprising structural units (E) and (F) being characterized in that: (1) m is an integer sufficient to provide in said polymer an average molecular weight of at least 8000; (2) the molar ratio of (III) to (IV), when said polymer comprises structural units (E), or the molar ratio of (III) to the total of (IV) and (V) when said polymer comprises structural units (F), being not less than 1:1 and (3) they contain from about 1 to 10 mole percent of said diol (b) based on the total of all units (III), (IV)
  • the vulcanization system of 3 the invention comprises sulfur in an amount of from about 0.3 to 3.0 parts by weight per hundred parts of elastomer, preferably 0.3 to 2.0 parts, same basis.
  • the polyethylene amine may be used in an amount of from about 1 to 6 parts thereof per 100 parts of elastomer, preferably from about 2 to 4 parts, same basis.
  • the vulcanizable elastomer composition may contain other conventional rubber compounding ingredients, such as fillers and reinforcing agents, e.g., carbon black, precipitated hydrous silica, titanium dioxide, calcium carbonate, calcium silicate, and the like; calcium oxide or calcium stearate (or other fatty acid salt) to neutralize acid catalyst residues in the elastomer; processing aids, such as sorbitan monostearate or stearic acid; sulfur-donating compounds; mercaptobenzothiazole; sulfenamides; thiuram sulfides, and the like, without departing from the scope of the invention.
  • fillers and reinforcing agents e.g., carbon black, precipitated hydrous silica, titanium dioxide, calcium carbonate, calcium silicate, and the like
  • calcium oxide or calcium stearate (or other fatty acid salt) to neutralize acid catalyst residues in the elastomer
  • processing aids such as sorbitan monostearate or ste
  • the vulcanizable compositions may be prepared by conventional rubber compounding techniques, using a tworoll rubber mill or a Banbury mixer, at temperatures of
  • compositions are vulcanized at similar temperatures, preferably about 325-350°F for about 15 to 60 minutes and, optionally, post-cured for periods of time to develop full cures.
  • the following examples are set forth for purposes of illustration only and are not to be construed as limitations on the present invention. All parts and percentages are by weight unless otherwise specified.
  • EXAMPLE 1 An elastomeric copolymer of 80% thiodiethanol, 15% isopropylidenebisphenol and 5% trimethylolpropane, monoallyl ether was compounded as follows:
  • compositions A thru C were cured for 60 minutes at 330°F and then post-cured for 16 hours at 120°C before testing.
  • composition A which represents a conventional sulfur vulcanization system, provides a fast cure rate, but exhibits poor thermal stability compared to Composition C which is many times more stable and which exhibits a good cure rate and develops good mechanical properties.
  • Composition B demonstrates that a very poor cure is obtained without zinc oxide in a conventional vulcanization system.
  • Polyamine D See Example 1 2 3 4 The compositions were cured for 30 minutes at
  • compositions were cured for 30 minutes at 330°F and post-cured for 4 hours at 120°C. Torque (inch-pounds) was measured at 330°F after
  • the stress-strain properties were as follows: Tensile , psi 520 1550 1500 1540
  • compositions were cured for 60 minutes at

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP19800902074 1980-03-17 1980-03-17 VULCANIZATION SYSTEM FOR THIODIETHANOL ELASTOMERS. Withdrawn EP0047736A4 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1980/000277 WO1981002740A1 (en) 1980-03-17 1980-03-17 Vulcanization system for thiodiethanol-based elastomers

Publications (2)

Publication Number Publication Date
EP0047736A1 EP0047736A1 (en) 1982-03-24
EP0047736A4 true EP0047736A4 (en) 1982-07-19

Family

ID=22154242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800902074 Withdrawn EP0047736A4 (en) 1980-03-17 1980-03-17 VULCANIZATION SYSTEM FOR THIODIETHANOL ELASTOMERS.

Country Status (4)

Country Link
EP (1) EP0047736A4 (ja)
JP (1) JPS6361965B2 (ja)
BR (1) BR8009040A (ja)
WO (1) WO1981002740A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4637253B2 (ja) * 2009-06-30 2011-02-23 キヤノン株式会社 新規有機化合物および有機発光素子および画像表示装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499864A (en) * 1968-08-19 1970-03-10 Edward Millen Heat stable storable,one part polythiol compositions with amine-loaded molecular sieves
DE2324628A1 (de) * 1972-05-22 1973-12-13 Thiokol Chemical Corp Verfahren zur haertung blockierter fluessiger polysulfidpolymere
WO1981002741A1 (en) * 1980-03-14 1981-10-01 American Cyanamid Co Elastomers derived from thiodiethanol having reduced odor and increased thermal stability

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985708A (en) * 1974-09-18 1976-10-12 American Cyanamid Company Polymeric reaction products of thiodiethanol and diphenols
US3951927A (en) * 1974-09-18 1976-04-20 American Cyanamid Company Vulcanizable elastomers from polythiodiethanol
US4000213A (en) * 1974-12-19 1976-12-28 American Cyanamid Company Use of diepoxides in polythiodiethanol millable gums
US4028305A (en) * 1974-12-19 1977-06-07 American Cyanamid Company Vulcanizable elastomers derived from thiodiethanol

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499864A (en) * 1968-08-19 1970-03-10 Edward Millen Heat stable storable,one part polythiol compositions with amine-loaded molecular sieves
DE2324628A1 (de) * 1972-05-22 1973-12-13 Thiokol Chemical Corp Verfahren zur haertung blockierter fluessiger polysulfidpolymere
WO1981002741A1 (en) * 1980-03-14 1981-10-01 American Cyanamid Co Elastomers derived from thiodiethanol having reduced odor and increased thermal stability

Also Published As

Publication number Publication date
EP0047736A1 (en) 1982-03-24
JPS6361965B2 (ja) 1988-11-30
WO1981002740A1 (en) 1981-10-01
JPS57500472A (ja) 1982-03-18
BR8009040A (pt) 1982-03-09

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Inventor name: BEHRENS, RUDOLF ADOLF