US3886233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of graft polymers
Assignee: Stamicarbon BV
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Filing: 1972-04-07
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Granted: 1975-05-27
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Expires: 1992-04-07
Abstract
Abstract Impact-resistant graft copolymers prepared by grafting a styrene, acryl or mixture of styrene-type and acryl polymers or copolymers onto a multiply unsaturated polymer based on ethylene, as a terpolymer of ethylene, propylene and other multiply unsaturated monomers (EPDM-rubbers) in the presence of a radicalforming peroxydi-carbonate initiator is disclosed. Graft copolymers so produced are impact-resistant, resist aging and are useful in forming tubes, films and bottles.
Inventors
- 👤 Marinus J R Visseren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:03
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
137 words
PROCESS FOR PREPARING GRAFT COPOLYMERS BY POLYMERIZING, IN THE PRESENCE OF A RADICAL-FORMING INITIATOR, AT LEAST ONE MOMONER SELECTED FROM THE CLASS CONSISTING OF: A. STYRENE. A-METHYL-STYRENE, MONOCHLOROSTYRENE, DICHLOROSTYRENE, ETHYL STYRENE, VINYLTOLUENE, VINYL-XYLENE, AND MIXTURES THEREOF; B. ACRYLONITRILE, METHACRYLONITRILE, METHYLACRYLATE, METHYLMETHACRYLATE, ETHYLACRYLATE, ETHYLMETHACRYLATE, PROPYLACRYLATE, PROPYLMETHACRYLATE, BUTYLACRYLATE, BUTYMETHACRYLATE, 2-ETHYLHEXYLACRYLATE, AND MIXTURES THEREOF; AND C. MIXTURES OF A AND B; IN THE PRESENCE OF A RUBBER-LIKE LARGELY SATURATED POLYMER CONTAINING: I. ETHYLENE, FROM ABOUT 19 TO ABOUT 73 WEIGHT PERCENT; II. AT LEAST ONE ALKENE, HAVING FROM 3 TO 6 CARBON ATOMS, ABOUT 23 TO ABOUT 77 WEIGHT PERCENT; AND III. AT LEAST ONE MULTIPLY UNSATURATED MOMONER, FROM ABOUT 4 TO ABOUT 20 WEIGHT PERCENT; SAID POLYMERIZATION CONDUCTED AT A TEMPERATURE OF ABOUT 30 TO ABOUT 230*C AND IN THE PRESENCE OF A PEROXYDICARBONATE RADICAL-FORMING INITIATOR OF THE FORMULA:
Claim 2
Dependent Claim
137 words
PROCESS FOR PREPARING GRAFT COPOLYMERS BY POLYMERIZING, IN THE PRESENCE OF A RADICAL-FORMING INITIATOR, AT LEAST ONE MOMONER SELECTED FROM THE CLASS CONSISTING OF: A. STYRENE. A-METHYL-STYRENE, MONOCHLOROSTYRENE, DICHLOROSTYRENE, ETHYL STYRENE, VINYLTOLUENE, VINYL-XYLENE, AND MIXTURES THEREOF; B. ACRYLONITRILE, METHACRYLONITRILE, METHYLACRYLATE, METHYLMETHACRYLATE, ETHYLACRYLATE, ETHYLMETHACRYLATE, PROPYLACRYLATE, PROPYLMETHACRYLATE, BUTYLACRYLATE, BUTYMETHACRYLATE, 2-ETHYLHEXYLACRYLATE, AND MIXTURES THEREOF; AND C. MIXTURES OF A AND B; IN THE PRESENCE OF A RUBBER-LIKE LARGELY SATURATED POLYMER CONTAINING: I. ETHYLENE, FROM ABOUT 19 TO ABOUT 73 WEIGHT PERCENT; II. AT LEAST ONE ALKENE, HAVING FROM 3 TO 6 CARBON ATOMS, ABOUT 23 TO ABOUT 77 WEIGHT PERCENT; AND III. AT LEAST ONE MULTIPLY UNSATURATED MOMONER, FROM ABOUT 4 TO ABOUT 20 WEIGHT PERCENT; SAID POLYMERIZATION CONDUCTED AT A TEMPERATURE OF ABOUT 30 TO ABOUT 230*C AND IN THE PRESENCE OF A PEROXYDICARBONATE RADICAL-FORMING INITIATOR OF THE FORMULA:
Claim 3
Dependent Claim
36 words
Process as claimed in claim 1, wherein R1 and R2, being the same or different, are alkyl, cycloalkyl, aryl, aralkyl, alkaryl and alkenyl groups all having from 1 to 30 carbon atoms, either substituted or not.
Claim 4
Dependent Claim
19 words
Process according to claim 2, wherein R1 and R2 are cycloalkyl groups of from 3 to 6 carbon atoms.
Claim 5
Dependent Claim
36 words
Process as claimed in claim 1, wherein said peroxydicarbonate compound is selected from the class consisting of diisopropylperoxydicarbonate, dibutylperoxy-dicarbonate, dicyclohexylperoxydicarbonate, bis(4-tertiary butylcyclohexyl)peroxydicarbonate, bis(4-tertiaryamylcyclohexyl)peroxydicarbonate, bis(4-cyclohexylcyclohexyl) peroxydicarbonate and bis(4-cyclohexylisopropylcyclohexyl) peroxydicarbonate, di-secondary amylperoxydicarbonate, didecylperoxydicarbonate, dilaurylperoxydicarbonate, dibenzylperoxydicarbonate, bis(2-ethylhexyl)peroxydicarbonate and distearylperoxydicarbonate.
Claim 6
Dependent Claim
27 words
Process as claimed in claim 1, wherein the amount of said peroxydicarbonate is between about 0.01 and about 2 mole percent calculated on the amount of monomers.
Claim 7
Dependent Claim
87 words
Process according to claim 1, wherein the rubber-like largely saturated polymer is a copolymer of ethylene and at least one Alpha -alkene having from 3 to 6 carbon atoms copolymerized with at least one multiply unsaturated monomer selected from the group consisting of hexadiene-1,4, dicyclopentadiene, tricyclopentadiene, 5-vinylnorbornene-2, 5-ethylidenenorbornene-2, 5-methylenenorbornene-2, 5-(2-propenyl)norbornene-2, 5-(5-hexenyl)norbornene-2, 4,7,8,9 tetrahydro-indene and isopropylidene tetrahydroindene, the content of said rubber being of from 19 to 73 percent weight ethylene, 23 - 77 percent weight Alpha -alkene and from 4 to 20 percent weight multiply unsaturated monomer.
Claim 8
Dependent Claim
43 words
Process according to claim 6, wherein ethylene is present from 38 to 68 percent weight, propylene is the Alpha -alkene and is present from 26 to 56 percent weight and from 6 to 15 percent weight of the multiply unsaturated monomer is present.
Claim 9
Dependent Claim
20 words
Process according to claim 1, wherein said rubber is ethylene-propylene-dicyclopentadiene terpolymer containing from 3.0 to 6.0 percent weight of dicyclopentadiene.
Claim 10
Dependent Claim
28 words
Process according to claim 1, wherein said rubber is ethylene-propylene-dicyclopentadiene-5-ethylidene-norbornene-2 quaterpolymer containing from 1.0 to 2.0 percent weight dicyclopentadiene and from 7.0 to 9.0 percent weight 5-ethylidene norbornene-2.
Claim 11
Dependent Claim
68 words
Process according to claim 1, wherein there is also present, to the extent of less than 50 weight percent of the monomers of parts A, B or C to be polymerized, an ethylenically unsaturated monomer other than stated in paragraphs A, B or C and selected from the group consisting of ethylene, propylene, butylene, vinyl ethers, vinyl esters, acrylamides, unsaturated dicarboxylic acids and esters of unsaturated dicarboxylic acids.
Claim 12
Dependent Claim
26 words
Process according to claim 1, wherein the ratio of rubber-like polymer and the graft monomers of parts A, B or C is between 4:1 and 1:40.
Claim 13
Dependent Claim
13 words
Process according to claim 11, wherein the ratio is between 2:1 and 1:20.
Claim 14
Dependent Claim
22 words
Process according to claim 1, wherein the rubber-like polymer amounts to from 2.5 to 80 percent weight of the resulting graft copolymer.
Claim 15
Dependent Claim
56 words
Process according to claim 1, wherein the polymerization is conducted by mixing the rubber with the monomer of part A, B or C in the presence of the peroxydicarbonate compound and, when not greater than 50 percent of the desired graft copolymer has been produced, the polymerization is terminated, and continued in a diluent until completion.
Claim 16
Dependent Claim
13 words
Process according to claim 1, wherein the monomer of part A is styrene.
Claim 17
Dependent Claim
25 words
Process according to claim 1, wherein the monomer of part B is selected from the class consisting of acrylonitrile, methylacrylate, methacrylonitrile, methylmethacrylate, ethylacrylate and butylacrylate.
Claim 18
Dependent Claim
19 words
Process according to claim 1, wherein the peroxydicarbonate initiator is cyclohexyl peroxydicarbonate, tertiary butyl cyclohexyl peroxydicarbonate and mixtures thereof.
Claim 19
Dependent Claim
9 words
Graft copolymer prepared by the process of claim 1.
Claim 20
Dependent Claim
10 words
A molded object comprising the graft copolymer of claim 18.
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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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |