US3875260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric compositions
Assignee: Sterling Moulding Materials Ltd
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Filing: 1971-12-07
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Granted: 1975-04-01
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Expires: 1991-12-07
Abstract
Abstract A polymer composition, e.g. a high-impact polystyrene, having novel morphological structure comprises a polymeric matrix, e.g. polystyrene, in which there are dispersed particles of a second polymer, e.g. an ethylene-propylene terpolymer. The particles of second polymer contain occlusions of matrix polymer and the occlusions also contain sub-occlusions of a third polymeric species, e.g. polybutadiene, which is more specific to grafting with the monomeric constituents of the matrix polymer than is the second polymer species. The compositions are tough and have good oxidation resistance.
Inventors
- 👤 Pravinkumar Goverdhanbha Patel
- 👤 Thomas Orr Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:26
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F255/00; C08F255/02; C08F255/06; C08F285/00; Y; Y10; Y10S; Y10S525/00; Y10S525/902
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
178 words
A PROCESS FOR THE PRODUCTION OF A POLYMER COMPOSITION COMPRISING A MATRIX OF POLYSTYRENE HAVING DISPOSED THEREIN PARTICLES OF AN ETHYLENE-PROPYLENE TERPOLYMER (EPT) HAVING A MOONEY VISCOSITY OF FROM 20 TO 200, SAID DISPERSED PARTICLES CONTAINING OCCLUSIONS OF MATRIX MATERIAL, SAID OCCLUSIONS CONTAINING SUBOCCLUSIONS OF A MODIFIED POLYBUTADIENE HAVING A MOONEY VISCOSITY (ML 1 + 4 AT 100*C) OF FROM 25 TO 70, WHICH PROCESS COMPRISES PROVIDING A SOLUTION OF EPT HAVING A MOONEY VISCOSITY OF FROM 20 TO 200 AND POLYBUTADIENE HAVING A MOONEY VISCOSITY (ML 1 + 4 AT 100*C) OF FROM 25 TO 70 IN MONOMERIC STYRENE, THE CONCENTRATIONS OF EPT AND POLYBUTADIENE BEING FROM 5 TO 7 PERCENT AND FROM 0.5 TO 2 PERCENT BY WEIGHT, RESPECTIVELY, BASED ON THE WEIGHT OF THE TOTAL COMPOSITON AND THE VOLUME OF THE POLYBUTADIENE STYRENE PHASE BEING LESS THAN THAT OF THE EPT-STYRENE PHASE AND EFFECTING POLYMERIZATION BY AN AGITATED MASS POLYMERIZATION TECHNIQUE UNTIL AT LEAST 20 PERCENT OF THE STYRENE HAS POLYMERIZED AND THEREAFTER COMPLETING THE POLYMERIZATION EITHER IN MASS OR IN A SUSPENSION IN WATER.
Claim 2
Dependent Claim
178 words
A PROCESS FOR THE PRODUCTION OF A POLYMER COMPOSITION COMPRISING A MATRIX OF POLYSTYRENE HAVING DISPOSED THEREIN PARTICLES OF AN ETHYLENE-PROPYLENE TERPOLYMER (EPT) HAVING A MOONEY VISCOSITY OF FROM 20 TO 200, SAID DISPERSED PARTICLES CONTAINING OCCLUSIONS OF MATRIX MATERIAL, SAID OCCLUSIONS CONTAINING SUBOCCLUSIONS OF A MODIFIED POLYBUTADIENE HAVING A MOONEY VISCOSITY (ML 1 + 4 AT 100*C) OF FROM 25 TO 70, WHICH PROCESS COMPRISES PROVIDING A SOLUTION OF EPT HAVING A MOONEY VISCOSITY OF FROM 20 TO 200 AND POLYBUTADIENE HAVING A MOONEY VISCOSITY (ML 1 + 4 AT 100*C) OF FROM 25 TO 70 IN MONOMERIC STYRENE, THE CONCENTRATIONS OF EPT AND POLYBUTADIENE BEING FROM 5 TO 7 PERCENT AND FROM 0.5 TO 2 PERCENT BY WEIGHT, RESPECTIVELY, BASED ON THE WEIGHT OF THE TOTAL COMPOSITON AND THE VOLUME OF THE POLYBUTADIENE STYRENE PHASE BEING LESS THAN THAT OF THE EPT-STYRENE PHASE AND EFFECTING POLYMERIZATION BY AN AGITATED MASS POLYMERIZATION TECHNIQUE UNTIL AT LEAST 20 PERCENT OF THE STYRENE HAS POLYMERIZED AND THEREAFTER COMPLETING THE POLYMERIZATION EITHER IN MASS OR IN A SUSPENSION IN WATER.
Claim 3
Dependent Claim
73 words
A polymer composition comprising a matrix of polystyrene having dispersed therein particles of an ethylene-propylene terpolymer having a Mooney Viscosity of from 20 to 200, said dispersed particles containing occlusions of polystyrene, said occlusions containing sub-occlusions of a modified polybutadiene having a Mooney Viscosity (ML 1 + 4 at 100*C) of from 25 to 70 and, said modified polybutadiene being more susceptible to grafting with a styrene monomer than is the ethylene-propylene terpolymer.
Claim 4
Dependent Claim
73 words
A polymer composition comprising a matrix of polystyrene having dispersed therein particles of an ethylene-propylene terpolymer having a Mooney Viscosity of from 20 to 200, said dispersed particles containing occlusions of polystyrene, said occlusions containing sub-occlusions of a modified polybutadiene having a Mooney Viscosity (ML 1 + 4 at 100*C) of from 25 to 70 and, said modified polybutadiene being more susceptible to grafting with a styrene monomer than is the ethylene-propylene terpolymer.
Claim 5
Dependent Claim
12 words
a solution of the said ethylene-propylene terpolymer in the monomeric styrene solvent.
Claim 6
Dependent Claim
12 words
a solution of the said ethylene-propylene terpolymer in the monomeric styrene solvent.
Claim 7
Dependent Claim
22 words
a solution of the said ethylene-propylene terpolymer in the monomeric styrene solvent containing a disperse phase of polystyrene in the styrene solvent.
Claim 8
Dependent Claim
22 words
a solution of the said ethylene-propylene terpolymer in the monomeric styrene solvent containing a disperse phase of polystyrene in the styrene solvent.
Claim 9
Dependent Claim
154 words
A process for the production of a polymer composition comprising a matrix of polystyrene having dispersed therein particles of an ethylene-propylene terpolymer having a Mooney Viscosity of from 20 to 200, said dispersed particles containing occlusions of polystyrene, said occlusions containing sub-occlusions of a modified polybutadiene having a Mooney Viscosity (ML 1 + 4 at 100*C) of from 25 to 70 and, said modified polybutadiene being more susceptible to grafting with a styrene monomer than is the ethylene-propylene terpolymer, which comprises providing a solution of an ethylene-propylene terpolymer having a Mooney Viscosity of from 20 to 200 in a styrene monomer solvent which is polymerizable to polystyrene, said solution containing a disperse phase of polystyrene in the solvent, said disperse phase containing occlusions of a modified polybutadiene polymer having a Mooney Viscosity (ML 1 + 4 at 100*C) of frOm 25 to 70, and effecting the polymerization of the monomeric styrene solvent to polystyrene.
Claim 10
Dependent Claim
154 words
A process for the production of a polymer composition comprising a matrix of polystyrene having dispersed therein particles of an ethylene-propylene terpolymer having a Mooney Viscosity of from 20 to 200, said dispersed particles containing occlusions of polystyrene, said occlusions containing sub-occlusions of a modified polybutadiene having a Mooney Viscosity (ML 1 + 4 at 100*C) of from 25 to 70 and, said modified polybutadiene being more susceptible to grafting with a styrene monomer than is the ethylene-propylene terpolymer, which comprises providing a solution of an ethylene-propylene terpolymer having a Mooney Viscosity of from 20 to 200 in a styrene monomer solvent which is polymerizable to polystyrene, said solution containing a disperse phase of polystyrene in the solvent, said disperse phase containing occlusions of a modified polybutadiene polymer having a Mooney Viscosity (ML 1 + 4 at 100*C) of frOm 25 to 70, and effecting the polymerization of the monomeric styrene solvent to polystyrene.
Claim 11
Dependent Claim
53 words
A process according to claim 3 wherein the solution is formed by providing a solution of the ethylene-propylene terpolymer and modified polybutadiene in the monomeric styrene solvent, the volume of the modified polybutadiene-solvent phase being less than that of the ethylene-propylene terpolymer-solvent phase, and effecting the polymerization of the styrene monomer to polystyrene.
Claim 12
Dependent Claim
14 words
A process according to claim 3 wherein the solution is formed by mixing together
Claim 13
Dependent Claim
14 words
A process according to claim 3 wherein the solution is formed by mixing together
Claim 14
Dependent Claim
53 words
A process according to claim 3 wherein the ethylene propylene terpolymer is present in an amount of from 5 to 7 percent by weight, based upon the weight of the total composition and the modified polybutadiene is present in an amount of from 0.5 to 2 percent by weight of the total composition.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |