US4665136A
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US
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Process for producing novel block alkylene polycarbonate copolymers
Assignee: PAC POLYMER Inc A CORP OF
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Filing: 1986-04-07
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Granted: 1987-05-12
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Expires: 2006-04-07
Abstract
Abstract The present invention is a novel class of block copolymers and a process of making the same. An alkylene oxide is reacted with CO 2 in an organic solvent in the presence of an organometallic catalyst to form a polyalkylene carbonate. A second alkylene oxide is subsequently added without the addition of catalyst. The resulting product is a block copolymer comprising distinct, covalently linked, alkylene carbonate blocks.
Inventors
- 👤 Joseph G. Santangelo
- 👤 James J. Weber
- 👤 Richard G. Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:27
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/18; C08G64/20; C08G64/32; C08G64/323
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
125 words
A process for producing a block copolymer having at least two distinct, covalently linked alkylene carbonate blocks and having the structural formula: ##STR3## wherein R 1 is H, CH 3 , C 2 H 5 , or C 6 H 5 ; R 2 and R 3 are independently H, CH 3 , C 2 H 5 or R 2 and R 3 together form a six member ring; and x and y are both integers from 50 to 10,000 said process comprising: (a) copolymerizing an alkylene oxide with excess carbon dioxide in a reaction vessel in the presence of an organometallic catalyst until said polymerization reaches equilibrium; and (b) subsequently adding a second alkylene oxide to the reaction vessel to form said block copolymer.
Claim 2
Dependent Claim
125 words
A process for producing a block copolymer having at least two distinct, covalently linked alkylene carbonate blocks and having the structural formula: ##STR3## wherein R 1 is H, CH 3 , C 2 H 5 , or C 6 H 5 ; R 2 and R 3 are independently H, CH 3 , C 2 H 5 or R 2 and R 3 together form a six member ring; and x and y are both integers from 50 to 10,000 said process comprising: (a) copolymerizing an alkylene oxide with excess carbon dioxide in a reaction vessel in the presence of an organometallic catalyst until said polymerization reaches equilibrium; and (b) subsequently adding a second alkylene oxide to the reaction vessel to form said block copolymer.
Claim 3
Dependent Claim
24 words
The process in accordance with claim 1 wherein the second alkylene oxide is added to the reaction vessel without the addition of additional catalyst.
Claim 4
Dependent Claim
23 words
The process in accordance with claim 1, wherein additional carbon dioxide is added to the reaction vessel along with the second alkylene oxide.
Claim 5
Dependent Claim
23 words
The process in accordance with claim 1, wherein said process is carried out at a temperature between about 0° C. to 150° C.
Claim 6
Dependent Claim
24 words
The process in accordance with claim 1, wherein said process is carried out at a pressure between about 5 and 50 kg/cm 2 .
Claim 7
Dependent Claim
27 words
The process in accordance with claim 1 wherein the alkylene oxides are selected from the group consisting of ethylene oxide, propylene oxide, isobutylene oxide and cyclohexyl oxide.
Claim 8
Dependent Claim
79 words
The process in accordance with claim 1, wherein the organometallic catalyst having the general formula R'n M wherein n is an integer, at least one R' is an alkyl group, an alicyclic group or halogen or hydroxy or alkoxy radicals, or hydrogen, the remaining R' groups are alkyl groups, alicyclic groups, alkaryl groups, aralkyl groups, aryl groups or halogen or hydroxy or alkoxy radicals, and M is a metal of Group I, II or III of the Periodic Table.
Claim 9
Dependent Claim
13 words
The process in accordance with claim 7 wherein said catalyst is diethyl zinc.
Claim 10
Dependent Claim
25 words
The process in accordance with claim 7 wherein said catalyst also comprises a co-catalyst component which is sulfur or a compound containing active hydrogen atoms.
Claim 11
Dependent Claim
26 words
The process in accordance with claim 9 wherein said catalyst and co-catalyst are also reacted with CO 2 prior to being used to catalyze the copolymerization.
Claim 12
Dependent Claim
20 words
The process in accordance with claim 1 wherein the carbon dioxide to alkylene oxide ratio is between 3:1 to 10:1.
Claim 13
Dependent Claim
25 words
The process in accordance with claim 1 wherein said organometallic catalyst is present in a catalytic amount of from between 0.01 to 10 mole percent.
Claim 14
Dependent Claim
19 words
The process in accordance with claim 1 wherein said block copolymer has a molecular weight between 5,000 and 1,000,000.
Claim 15
Dependent Claim
20 words
The process in accordance with claim 1 wherein said process is carried out in the presence of an organic solvent.
Claim 16
Dependent Claim
13 words
The process in accordance with claim 14 wherein said organic solvent comprises dioxane.
Claim 17
Dependent Claim
17 words
The process in accordance with claim 14 wherein an organic diluent is added to the organic solvent.
Claim 18
Dependent Claim
13 words
The process in accordance with claim 16 wherein said organic diluent is toluene.
Claim 19
Dependent Claim
75 words
A block copolymer having at least two distinct covalently linked alkylene carbonate blocks, and having the structural formula: ##STR4## wherein R 1 is H, CH 3 , C 2 H 5 or C 6 H 5 ; R 2 and R 3 are independently H, CH 3 , C 2 H 5 or R 2 and R 3 together form a six member ring; and x and y are both integers from 50 to 10,000.
Claim 20
Dependent Claim
75 words
A block copolymer having at least two distinct covalently linked alkylene carbonate blocks, and having the structural formula: ##STR4## wherein R 1 is H, CH 3 , C 2 H 5 or C 6 H 5 ; R 2 and R 3 are independently H, CH 3 , C 2 H 5 or R 2 and R 3 together form a six member ring; and x and y are both integers from 50 to 10,000.
Claim 21
Dependent Claim
19 words
The block copolymer in accordance with claim 18 wherein said copolymer has a molecular weight between 5,000 and 1,000,000.
Claim 22
Dependent Claim
15 words
The block copolymer in accordance with claim 18 wherein said copolymer is a thermoplastic elastomer.
Claim 23
Dependent Claim
18 words
The block copolymer in accordance with claim 18 wherein one covalently linked alkylene carbonate block comprises ethylene carbonate.
Claim 24
Dependent Claim
19 words
The block copolymer in accordance with claim 21 wherein the second covalently linked alkylene carbonate block comprises propylene carbonate.
Claim 25
Dependent Claim
19 words
The block copolymer in accordance with claim 21 wherein the second covalently linked alkylene carbonate block comprises cyclohexyl carbonate.
Claim 26
Dependent Claim
20 words
The block copolymer in accordance with claim 18 wherein the second covalently linked block is a "pure" polyalkylene carbonate block.
Claim 27
Dependent Claim
20 words
The block copolymer in accordance with claim 18 wherein the second covalently linked block is a "mixed" polyalkylene carbonate block.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |