US4340689A
Expired / Lapsed
US
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Method of grafting EPM and EPDM polymers
Assignee: DSM Copolymer Inc
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Filing: 1979-09-17
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Granted: 1982-07-20
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Expires: 1999-09-17
Abstract
Abstract A process for grafting functional organic groups onto EPM and EPDM polymers wherein the grafting reaction is carried out in the cement in which the polymer is originally formed by solution polymerization.
Inventors
- 👤 Ralph K. Joffrion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:09
CPC Classifications
C; C10; C10M; C10M143/00; C10M143/02; C08; C08F; C08F255/00; C08F255/02; C08F255/04; C08F255/06; C10M149/00; C10M149/02; C10M149/10; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/024; C10M2217/026; C10M2217/028; C10M2217/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
105 words
A process for grafting onto EPM and EPDM backbone polymers formed by solution polymerization in the presence of a Ziegler type catalyst in which the solution polymerization reaction is terminated in a cement stage with the polymer that is formed remaining in solution in the polymerization solvent, the steps of introducing into the cement a grafting compound in the form of an organic compound containing polar groups, introducing into the cement a catalyst in the form of a free radical initiator capable of hydrogen abstraction for admixture with the cement while the cement is at reaction temperature far above the decomposition temperature for the catalyst.
Claim 2
Dependent Claim
105 words
A process for grafting onto EPM and EPDM backbone polymers formed by solution polymerization in the presence of a Ziegler type catalyst in which the solution polymerization reaction is terminated in a cement stage with the polymer that is formed remaining in solution in the polymerization solvent, the steps of introducing into the cement a grafting compound in the form of an organic compound containing polar groups, introducing into the cement a catalyst in the form of a free radical initiator capable of hydrogen abstraction for admixture with the cement while the cement is at reaction temperature far above the decomposition temperature for the catalyst.
Claim 3
Dependent Claim
36 words
The process as claimed in claim 1 which includes the step of concentrating the cement for the removal of unreacted monomer, water and some of the organic solvent before admixture of the catalyst and grafting compound.
Claim 4
Dependent Claim
36 words
The process as claimed in claim 2 in which the grafting compound is admixed with the cement in an amount within the ratio of 1-5 parts by weight grafting compound per 1 part by weight polymer.
Claim 5
Dependent Claim
21 words
The process as claimed in claim 1 in which the free radical initiator capable of hydrogen abstraction is a peroxide catalyst.
Claim 6
Dependent Claim
35 words
The process as claimed in claim 4 in which the catalyst is admixed into the cement in the ratio of 1 part by weight of catalyst to 1-3 parts by weight of the grafting compound.
Claim 7
Dependent Claim
26 words
The process as claimed in claim 1 in which the polymer in the cement has a molecular weight within the range of 0.2 to 3.0 RSV.
Claim 8
Dependent Claim
21 words
The process as claimed in claim 1 in which the polymer in the cement has a molecular weight above 0.4 RSV.
Claim 9
Dependent Claim
28 words
The process as claimed in claim 1 in which the solvent is selected from the group consisting of an aliphatic solvent, a cycloaliphatic solvent and halogenating derivatives thereof.
Claim 10
Dependent Claim
23 words
The process as claimed in claim 1 in which the grafting reaction is continued for at least 3 half lives of the catalyst.
Claim 11
Dependent Claim
20 words
The process as claimed in claim 1 in which the grafting compound is an ethylenically unsaturated compound containing polar groups.
Claim 12
Dependent Claim
23 words
The process as claimed in claim 10 in which the compound is selected from the group consisting of N-vinyl pyridine and N-vinyl pyrrolidone.
Claim 13
Dependent Claim
17 words
The process as claimed in claim 10 in which the grafting compound is an organic amino compound.
Claim 14
Dependent Claim
17 words
The process as claimed in claim 10 in which the grafting compound is an unsaturated organo silane.
Claim 15
Dependent Claim
39 words
The process as claimed in claim 1 in which the polymerization reaction is carried out with hexane as a solvent and the grafting reaction is carried out with the cement in which the polymer remains dissolved in the 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) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |