Patent US3846388A successfully refreshed from Google Patents.
US3846388A
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Copolymer of a conjugated diolefin and vinyl chloride and manufacturing process therefor
Assignee: Bridgestone Corp
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Filing: 1973-05-09
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Granted: 1974-11-05
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Expires: 1993-05-09
Abstract
Abstract A high molecular weight copolymer of a conjugated diolefin and vinyl chloride in which the vinyl chloride content is from 5 mol up to 50 mol percent relative to the total monomers and the vinyl chloride unit is distributed at random in the molecule chain, and a manufacturing process for such copolymer by carrying out the copolymerization by adding a particular catalyst in the presence of at least the vinyl chloride monomer, in a halogenated hydrocarbon as solvent, at a temperature of -100* to 80*C so that the molar ratio of said catalyst to the total amount of the monomers as charged is 0.05 to 0.0001. The catalyst is any acidic Friedel-Crafts metal halide compound wherein the metal belongs to Group II to VIII of the Periodic Table or alkylaluminum halide compound of the general formula, A1 Rn X3 n wherein R represents an alkyl group, X represents a halogen atom and n represents 1 or 1.5.
Inventors
- 👤 T Ohashi
- 👤 R Sakata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:05
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
A PROCESS FOR MANUFACTURING A RANDOM COPOLYMER OR A CONJUGATED DIOLEFIN AND VINYL CHLORIDE, HAVING VINYL CHLORIDE CONTENT OF 5 TO 50 MOL PERCENT WHICH COMPRISES CARRYING OUT THE COPOLYMERIZATION IN THE PRESENCE OF A HALOGENATED HYDROCARBON AS SOLVENT, AT A TEMPERATURE OF -100* TO 80*C, THE MOLAR RATIO OF SAI CONJUGATED DIOLEFIN TO VINYL CHLORIDE BEING 98/2 TO 2/98, USING AN UNMODIFIED CATALYST, IN THE PRESENCE OF AT LEAST THE VINYL CHLORIDE MONOMER, SAID CATALYST BEING SELECTED FROM THE GROUP CONSISTING OF ACIDIC FRIEDEL-CRAFTS METAL HALIDE COMPOUNDS WHEREIN THE METAL IS OF GROUPS II TO VIII OF THE PERIODIC TABLE AND ALKYLALUMINUM HALIDE COMPOUNDS OF THE FORMULA, ALRN X3-N WHEREIN R REPRESENTS AN ALKYL GROUP, X REPRESENTS A HALOGEN ATOM AND N REPRESENTS 1 OR 1.5 SO THAT THE MOLAR RATIO OF SAID CATALYST TO THE TOTAL AMOUNT OF THE MONOMERS AS CHARGED IN 0.05 TO 0.0001.
Claim 2
Dependent Claim
148 words
A PROCESS FOR MANUFACTURING A RANDOM COPOLYMER OR A CONJUGATED DIOLEFIN AND VINYL CHLORIDE, HAVING VINYL CHLORIDE CONTENT OF 5 TO 50 MOL PERCENT WHICH COMPRISES CARRYING OUT THE COPOLYMERIZATION IN THE PRESENCE OF A HALOGENATED HYDROCARBON AS SOLVENT, AT A TEMPERATURE OF -100* TO 80*C, THE MOLAR RATIO OF SAI CONJUGATED DIOLEFIN TO VINYL CHLORIDE BEING 98/2 TO 2/98, USING AN UNMODIFIED CATALYST, IN THE PRESENCE OF AT LEAST THE VINYL CHLORIDE MONOMER, SAID CATALYST BEING SELECTED FROM THE GROUP CONSISTING OF ACIDIC FRIEDEL-CRAFTS METAL HALIDE COMPOUNDS WHEREIN THE METAL IS OF GROUPS II TO VIII OF THE PERIODIC TABLE AND ALKYLALUMINUM HALIDE COMPOUNDS OF THE FORMULA, ALRN X3-N WHEREIN R REPRESENTS AN ALKYL GROUP, X REPRESENTS A HALOGEN ATOM AND N REPRESENTS 1 OR 1.5 SO THAT THE MOLAR RATIO OF SAID CATALYST TO THE TOTAL AMOUNT OF THE MONOMERS AS CHARGED IN 0.05 TO 0.0001.
Claim 3
Dependent Claim
37 words
A process as claimed in claim 1, wherein said catalyst consists of at least one acidic Friedal-Crafts metal halide selected from the group consisting of halides of beryllium, boron, aluminum, gallium, titanium, tin, vanAdium, tungsten and iron.
Claim 4
Dependent Claim
33 words
A process as claimed in claim 2, wherein said halide is aluminum trichloride, aluminum tribromide, boron trifluoride etherate, gallium trichloride, titanium tetrachloride, stannic chloride, ferric chloride, vanadium tetrachloride, vanadyl trichloride or tungsten hexachloride.
Claim 5
Dependent Claim
39 words
A process as claimed in claim 1, wherein said alkylaluminum halide is represented by the general formula, Al Rn Cl3 n wherein R is an alkyl group having 1 to 4 carbon atoms and n represents 1 or 1.5.
Claim 6
Dependent Claim
25 words
A process as claimed in claim 4 wherein said alkylaluminum chloride is selected from the group consisting of ethylaluminum dichloride, ethylaluminum sesquichloride and n-butylaluminum dichloride.
Claim 7
Dependent Claim
32 words
A process as claimed in claim 1 wherein said catalyst is a combination selected from the group consisting of vanadium tetrachloride/ethylaluminum dichloride, titanium tetrachloride/ethylaluminum dichloride, gallium trichloride/ethylaluminum dichloride and vanadyl trichloride/ethylaluminum dichloride.
Claim 8
Dependent Claim
17 words
A process as claimed in claim 1 wherein said conjugated diolefin has 4 to 10 carbon atoms.
Claim 9
Dependent Claim
13 words
A process as claimed in claim 7 wherein said conjugated diolefin is butadiene.
Claim 10
Dependent Claim
13 words
A process as claimed in claim 7 wherein said conjugated diolefin is isoprene.
Claim 11
Dependent Claim
23 words
A process as claimed in claim 1 wherein said halogenated hydrocarbon solvent is selected from the group consisting of chloroform and methylene chloride.
Claim 12
Dependent Claim
26 words
A process as claimed in claim 1 wherein the molar ratio of said catalyst to the total amount of monomers charged ranges from 0.005 to 0.0002.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |