Patent US4381374A successfully refreshed from Google Patents.
US4381374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenation of butadiene polymers in mixed solvents
Assignee: PPG Industries Inc
•
Filing: 1981-11-12
•
Granted: 1983-04-26
•
Expires: 2001-11-12
Abstract
Abstract Polybutadiene having high cis-1,4-configuration and dissolved in substantially anhydrous liquid organic solvent is reacted with chlorine, bromine or a mixture thereof. The solvent consists essentially of a mixture of one or more perhalogenated alkanes and one or more partially halogenated alkanes and fine particles of substantially thermoplastic halogenated polybutadiene precipitate from the solvent. The fine particles are separated from the bulk of the solvent.
Inventors
- 👤 Patrick E. Hillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:18
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/12; C08C19/14
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
105 words
In a process for producing substantially thermoplastic halogenated butadiene polymer wherein butadiene polymer dissolved in liquid organic solvent is reacted with chlorine, bromine or a mixture thereof, the improvement wherein a. said solvent consists essentially of a mixture of one or more prehalogenated alkanes having one to about two carbon atoms and one or more partially halogenated alkanes having one to about two carbon atoms, b. fine particles of said substantially thermoplastic halogenated butadiene polymer having a solubility index of at least about 50 precipitate from said solvent during said reaction, and c. said precipitated fine particles are separated from the bulk of said solvent.
Claim 2
Dependent Claim
105 words
In a process for producing substantially thermoplastic halogenated butadiene polymer wherein butadiene polymer dissolved in liquid organic solvent is reacted with chlorine, bromine or a mixture thereof, the improvement wherein a. said solvent consists essentially of a mixture of one or more prehalogenated alkanes having one to about two carbon atoms and one or more partially halogenated alkanes having one to about two carbon atoms, b. fine particles of said substantially thermoplastic halogenated butadiene polymer having a solubility index of at least about 50 precipitate from said solvent during said reaction, and c. said precipitated fine particles are separated from the bulk of said solvent.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein the volumetric ratio of said perhalogenated alkane to said partially halogenated alkane in said solvent is in the range of from about 0.4:1 to about 8:1.
Claim 4
Dependent Claim
14 words
The process of claim 1 wherein said separation is accomplished by filtration or centrifugation.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein said separated solvent is recycled to said process.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein said substantially thermoplastic halogenated butadiene polymer has a solubility index of at least about 80.
Claim 7
Dependent Claim
21 words
The process of claim 1 wherein said substantially thermoplastic halogenated butadiene polymer has a solubility index of at least about 90.
Claim 8
Dependent Claim
30 words
The process of claim 1 wherein said substantially thermoplastic halogenated butadiene polymer has a halogen content in the range of from about 5 percent to about 80 percent by weight.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein said reaction is conducted at temperatures in the range of from about -10° C. to about +150° C.
Claim 10
Dependent Claim
24 words
The process of claim 1 wherein said reaction is conducted at temperatures in the range of from about 0° C. to about 60° C.
Claim 11
Dependent Claim
27 words
The process of claim 1 wherein said reaction is conducted at pressures in the range of from about 0 to about 500 pounds per square inch gauge.
Claim 12
Dependent Claim
27 words
The process of claim 1 wherein said butadiene polymer is reacted with chlorine and wherein said substantially thermoplastic halogenated butadiene polymer is substantially thermoplastic chlorinated butadiene polymer.
Claim 13
Dependent Claim
19 words
The process of claim 1 wherein said butadiene polymer is polybutadiene having at least about 90 mole percent cis-1,4-configuration.
Claim 14
Dependent Claim
24 words
The process of claim 12 wherein said polybutadiene is reacted with chlorine and wherein said substantially thermoplastic halogenated polybutadiene is substantially thermoplastic chlorinated polybutadiene.
Claim 15
Dependent Claim
14 words
The process of claim 13 wherein said separation is accomplished by filtration or centrifugation.
Claim 16
Dependent Claim
14 words
The process of claim 13 wherein said separated solvent is recycled to said process.
Claim 17
Dependent Claim
20 words
The process of claim 13 wherein said substantially thermoplastic chlorinated polybutadiene has a solubility index of at least about 80.
Claim 18
Dependent Claim
20 words
The process of claim 13 wherein said substantially thermoplastic chlorinated polybutadiene has a solubility index of at least about 90.
Claim 19
Dependent Claim
29 words
The process of claim 13 wherein said substantially thermoplastic chlorinated polybutadiene has a chlorine content in the range of from about 5 percent to about 80 percent by weight.
Claim 20
Dependent Claim
24 words
The process of claim 13 wherein said reaction is conducted at temperatures in the range of from about -10° C. to about +150° C.
Claim 21
Dependent Claim
24 words
The process of claim 13 wherein said reaction is conducted at temperatures in the range of from about 0° C. to about 60° C.
Claim 22
Dependent Claim
27 words
The process of claim 13 wherein said reaction is conducted at pressures in the range of from about 0 to about 500 pounds per square inch gauge.
Claim 23
Dependent Claim
23 words
The process of claim 13 wherein said solvent consists essentially of a. carbon tetrachloride, and b. methylene chloride, chloroform or a mixture thereof.
Claim 24
Dependent Claim
91 words
In a process for producing substantially thermoplastic chlorinated butadiene polymer wherein polymer dissolved in liquid organic solvent is reacted with chlorine, the improvement wherein a. said butadiene polymer is polybutadiene having at least about 90 mole percent cis-1,4-configuration, b. said solvent consists essentially of a mixture of carbon tetrachloride and methylene chloride, c. fine particles of substantially thermoplastic chlorinated butadiene polymer having a solubility index of at least about 50 precipitate from said solvent during said reaction, and d. said precipitated fine particles are separated from the bulk of said solvent.
Claim 25
Dependent Claim
91 words
In a process for producing substantially thermoplastic chlorinated butadiene polymer wherein polymer dissolved in liquid organic solvent is reacted with chlorine, the improvement wherein a. said butadiene polymer is polybutadiene having at least about 90 mole percent cis-1,4-configuration, b. said solvent consists essentially of a mixture of carbon tetrachloride and methylene chloride, c. fine particles of substantially thermoplastic chlorinated butadiene polymer having a solubility index of at least about 50 precipitate from said solvent during said reaction, and d. said precipitated fine particles are separated from the bulk of said solvent.
Claim 26
Dependent Claim
23 words
The process of claim 23 wherein the volumetric ratio of said carbon tetrachloride to said methylene chloride in said solvent is about 4:1.
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) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |