US3884883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arylene sulfide polymers
Assignee: Phillips Petroleum Co
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Filing: 1973-11-19
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Granted: 1975-05-20
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Expires: 1993-11-19
Abstract
Abstract A method of producing arylene sulfide polymers employing (1) polyhalosubstituted aromatic compounds; (2) thiocarbonates; (3) bases selected from the hydroxides of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium and barium and the carbonates of sodium, potassium, rubidium and cesium; and, (4) organic amides.
Inventors
- 👤 Charles W Moberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:09
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/025; C08G75/0272
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
75 words
A METHOD OF PRODUCING A POLYMER WHICH COMPRISES: A. FORMING A COMPOSITION BY CONTACT AT LEAST ONE POLYHALO-SUBSTITUTE AROMATIC COMPOUND WHEREIN THE HALOGEN ATOMS ARE ATTACHED TO AROMATIC RING CARBON ATOMS, AT LEAST ONE BASE SELECTED FROM THE HYDROXIDES OF LITHIUM, SODIUM, P POTASSIUM, RUBIDUM, CESIUM, MAGNESIUM, C L CIUM, STRONTIUM AND BARIUM AND THE CARBONATES OF SODIUM, POTASSIUM, RUBIDIUM AND CESIUM, AT LEAST ONE ORGANIC AMIDE AND AT LEAST ONE THIOCARBONATE HAVING THE FORMULA
Claim 2
Independent Claim
75 words
A METHOD OF PRODUCING A POLYMER WHICH COMPRISES: A. FORMING A COMPOSITION BY CONTACT AT LEAST ONE POLYHALO-SUBSTITUTE AROMATIC COMPOUND WHEREIN THE HALOGEN ATOMS ARE ATTACHED TO AROMATIC RING CARBON ATOMS, AT LEAST ONE BASE SELECTED FROM THE HYDROXIDES OF LITHIUM, SODIUM, P POTASSIUM, RUBIDUM, CESIUM, MAGNESIUM, C L CIUM, STRONTIUM AND BARIUM AND THE CARBONATES OF SODIUM, POTASSIUM, RUBIDIUM AND CESIUM, AT LEAST ONE ORGANIC AMIDE AND AT LEAST ONE THIOCARBONATE HAVING THE FORMULA
Claim 3
Dependent Claim
64 words
The method of claim 1 in which said thiocarbonate is selected from the group consisting of lithium methylxanthate, potassium ethylxanthate, methyl isopropylxanthate, ethyl butylxanthate, isobutyl hexylxanthate, cyclohexylmethyl (2-ethylhexyl)xanthate, dodecyl dodecylxanthate, cesium cyclohexylxanthate, heptyl (3-methylcyclopentyl)xanthate, sodium phenylxanthate, benzyl p-tolylxanthate, S,S-diethyl dithiocarbonate, S-methyl S-butyl dithiocarbonate, S-cyclopentyl S-phenyl dithiocarbonate, O,O-dipropyl thiocarbonate, O-ethyl O-isobutyl thiocarbonate, O-(2-methylcyclopentyl) O-benzyl thiocarbonate, O-propyl S-decyl thiocarbonate, O-phenyl S-cyclohexyl thiocarbonate and S-rubidium O-ethyl thiocarbonate.
Claim 4
Dependent Claim
34 words
The method of claim 1 in which said polyhalo-substituted aromatic compound is employed in an amount within the range of from about 0.9 to about 2 gram-moles per gram-atom of sulfur in said thiocarbonate.
Claim 5
Dependent Claim
32 words
The method of claim 1 in which said base is employed in an amount within the range of from about 1 to about 6 gram-equivalents per gram-atom of sulfur in said thiocarbonate.
Claim 6
Dependent Claim
34 words
The method of claim 2 in which said organic amide is employed in an amount within the range of from about 100 grams to about 2, 500 grams per gram-mole of polyhalo-substituted aromatic compound.
Claim 7
Dependent Claim
29 words
The method of claim 1 in which said polyhalo-substituted aromatic compound is p-dichlorobenzene, said organic amide is N-methyl-2-pyrrolidone, said base is sodium hydroxide and said thiocarbonate is potassium ethylxanthate.
Claim 8
Dependent Claim
21 words
The method of claim 1 in which water is removed from said composition prior to maintaining said composition at polymerization conditions.
Claim 9
Independent Claim
17 words
A method of producing a polymer which comprises: a. contacting at least one thiocarbonate having the formula
Claim 10
Independent Claim
17 words
A method of producing a polymer which comprises: a. contacting at least one thiocarbonate having the formula
Claim 11
Dependent Claim
64 words
The method of claim 8 in which said thiocarbonate is selected from the group consisting of lithium methylxanthate, potassium ethylxanthate, methyl isopropylxanthate, ethyl butylxanthate, isobutyl hexylxanthate, cyclohexylmethyl (2-ethylhexyl)xanthate, dodecyl dodecylxanthate, cesium cyclohexylxanthate, heptyl (3-methylcyclopentyl)xanthate, sodium phenylxanthate, benzyl p-tolylxanthate, S,S-diethyl dithiocarbonate, S-methyl S-butyl dithiocarbonate, S-cyclopentyl S-phenyl dithiocarbonate, O,O-dipropyl thiocarbonate, O-ethyl O-isobutyl thiocarbonate, O-(2-methylcyclopentyl) O-benzyl thiocarbonate, O-propyl S-decyl thiocarbonate, O-phenyl S-cyclohexyl thiocarbonate and S-rubidium O-ethyl thiocarbonate.
Claim 12
Dependent Claim
34 words
The method of claim 8 in which said polyhalo-substituted aromatic compound is employed in an amount within the range of from about 0.9 to about 2 gram-moles per gram-atom of sulfur in said thiocarbonate.
Claim 13
Dependent Claim
32 words
The method of claim 8 in which said base is employed in an amount within the range of from about 1 to about 6 GRAM-EQUIVALENTS per gram-atom of sulfur in said thiocarbonate.
Claim 14
Dependent Claim
33 words
The method of claim 9 in which said organic amide is employed in an amount within the range of from about 100 grams to about 2,500 grams per gram-mole of polyhalo-substituted aromatic compound.
Claim 15
Dependent Claim
29 words
The method of claim 8 in which said polyhalo-substituted aromatic compound is p-dichlorobenzene, said organic amide is N-methyl-2-pyrrolidone, said base is sodium hydroxide and said thiocarbonate is potassium ethylxanthate.
Claim 16
Dependent Claim
23 words
The method of claim 8 in which water is removed from said first composition prior to maintaining said second composition at polymerization conditions.
References Cited (Backward Citations)
US3367975A
Cited
US3356656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |