US4187260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass polymerization process for polyblends
Assignee: ENICHEM SYNTHESIS SpA PALERMO ITALY A CORP OF ITALY
•
Filing: 1976-08-23
•
Granted: 1980-02-05
•
Expires: 1996-08-23
Abstract
Abstract The invention relates to an improved process for the mass polymerization of solutions comprising monoalkenyl aromatic monomers and optionally monoalkenyl nitrile monomers having a diene rubber dissolved therein wherein the improvement comprises dissolving a minor amount of an organic diperoxide compound in said solution and mass polymerizing said solution, said diperoxide initiating a higher molecular weight polymer fraction providing said polymer with a broader molecular weight distribution.
Inventors
- 👤 Robert L. Kruse
- 👤 Gene E. DeJackome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:06
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F279/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
An improved process for the mass polymerizing of a solution comprising a monoalkenyl aromatic monomer having a diene rubber dissolved therein wherein the improvement comprises: A. dissolving a minor amount of an organic diperoxide initiator in said solution, B. mass polymerizing said solution at temperatures of from about 80°-180° C., with agitation, C. forming polymer molecules of said monomers as a matrix phase having dispersed therein a diene rubber phase as rubber particles grafted with and having occluded at least a portion of said polymer molecules, said diperoxide compound being selected such that, during polymerization, said diperoxide compound initiates a higher molecular weight polymer fraction providing said polymer with a broader molecular weight distribution, said organic diperoxide initiator being 2,5,dimethyl-2,5-bis(t-butyl peroxy) hexyne-3.
Claim 2
Dependent Claim
122 words
An improved process for the mass polymerizing of a solution comprising a monoalkenyl aromatic monomer having a diene rubber dissolved therein wherein the improvement comprises: A. dissolving a minor amount of an organic diperoxide initiator in said solution, B. mass polymerizing said solution at temperatures of from about 80°-180° C., with agitation, C. forming polymer molecules of said monomers as a matrix phase having dispersed therein a diene rubber phase as rubber particles grafted with and having occluded at least a portion of said polymer molecules, said diperoxide compound being selected such that, during polymerization, said diperoxide compound initiates a higher molecular weight polymer fraction providing said polymer with a broader molecular weight distribution, said organic diperoxide initiator being 2,5,dimethyl-2,5-bis(t-butyl peroxy) hexyne-3.
Claim 3
Dependent Claim
122 words
An improved process for the mass polymerizing of a solution comprising a monoalkenyl aromatic monomer having a diene rubber dissolved therein wherein the improvement comprises: A. dissolving a minor amount of an organic diperoxide initiator in said solution, B. mass polymerizing said solution at temperatures of from about 80°-180° C., with agitation, C. forming polymer molecules of said monomers as a matrix phase having dispersed therein a diene rubber phase as rubber particles grafted with and having occluded at least a portion of said polymer molecules, said diperoxide compound being selected such that, during polymerization, said diperoxide compound initiates a higher molecular weight polymer fraction providing said polymer with a broader molecular weight distribution, said organic diperoxide initiator being 2,5,dimethyl-2,5-bis(t-butyl peroxy) hexane.
Claim 4
Dependent Claim
122 words
An improved process for the mass polymerizing of a solution comprising a monoalkenyl aromatic monomer having a diene rubber dissolved therein wherein the improvement comprises: A. dissolving a minor amount of an organic diperoxide initiator in said solution, B. mass polymerizing said solution at temperatures of from about 80°-180° C., with agitation, C. forming polymer molecules of said monomers as a matrix phase having dispersed therein a diene rubber phase as rubber particles grafted with and having occluded at least a portion of said polymer molecules, said diperoxide compound being selected such that, during polymerization, said diperoxide compound initiates a higher molecular weight polymer fraction providing said polymer with a broader molecular weight distribution, said organic diperoxide initiator being 2,5,dimethyl-2,5-bis(t-butyl peroxy) hexane.
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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |