US4000220A
Expired / Lapsed
US
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Method for producing thermoplastic resin
Assignee: Hitachi Ltd
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Filing: 1974-05-13
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Granted: 1976-12-28
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Expires: 1994-05-13
Abstract
Abstract The invention relates to a method for producing a thermoplastic resin useful particularly as an engineering plastics, which comprises suspending in an aqueous medium a solution comprising (a) a non-polar rubbery polymer having an iodine value of 2 to 40, (b) an aromatic vinyl monomer, (c) an aliphatic vinyl monomer, and a small amount of an organic solvent, and suspension-polymerizing in the presence of a polymerization initiator.
Inventors
- 👤 Fusaji Shoji
- 👤 Hisashi Kohgame
- 👤 Tadashi Muroi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:50
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/08; C08F255/10; B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; C08F255/02; C08F255/06; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
195 words
A method for producing a thermoplastic graft copolymer resin comprising preparing a solution by dissolving 5 to 45 parts by weight of (a) at least one substantially non-polar rubbery polymer selected from the group consisting of ethylene-propylenediene rubber, butyl rubber and mixtures thereof having an iodine value of 2 to 40, and 95 to 55 parts by weight of a vinyl monomer component including 2 to 98 percent by weight of (b) an aromatic vinyl monomer and 98 to 2 percent by weight of (c) an aliphatic vinyl monomer represented by the general formula CH 2 = C(R)X, wherein R is hydrogen, a methyl or ethyl group, and X is --CN, --COOH --COOCH 3 or --COOC 2 H 5 , in an organic solvent capable of dissolving said non-polar rubbery polymer, the amount of solvent being 5 to 50 parts by weight per 100 parts by weight of the total of components (a), (b) and (c); suspending 100 parts by weight of said solution in 70 to 400 parts by weight of an aqueous medium for forming a suspension of said solution suitable for suspension polymerizing; and suspension-polymerizing in the presence of a polymerization initiator.
Claim 2
Independent Claim
195 words
A method for producing a thermoplastic graft copolymer resin comprising preparing a solution by dissolving 5 to 45 parts by weight of (a) at least one substantially non-polar rubbery polymer selected from the group consisting of ethylene-propylenediene rubber, butyl rubber and mixtures thereof having an iodine value of 2 to 40, and 95 to 55 parts by weight of a vinyl monomer component including 2 to 98 percent by weight of (b) an aromatic vinyl monomer and 98 to 2 percent by weight of (c) an aliphatic vinyl monomer represented by the general formula CH 2 = C(R)X, wherein R is hydrogen, a methyl or ethyl group, and X is --CN, --COOH --COOCH 3 or --COOC 2 H 5 , in an organic solvent capable of dissolving said non-polar rubbery polymer, the amount of solvent being 5 to 50 parts by weight per 100 parts by weight of the total of components (a), (b) and (c); suspending 100 parts by weight of said solution in 70 to 400 parts by weight of an aqueous medium for forming a suspension of said solution suitable for suspension polymerizing; and suspension-polymerizing in the presence of a polymerization initiator.
Claim 3
Dependent Claim
42 words
A method for producing a thermoplastic resin according to claim 1, wherein the non-polar rubbery polymer is at least one rubbery polymer selected from ethylene-propylene-diene rubber and butyl rubber having a Mooney viscosity, ML 1 +4 (100° C), of 25 to 120.
Claim 4
Dependent Claim
54 words
A method for producing a thermoplastic resin according to claim 1, wherein the mixing ratio of said vinyl monomer components including the component to the non-polar rubbery polymer component is 90 to 70 parts by weight of the vinyl monomer component to 10 to 30 parts by weight of the non-polar rubbery polymer component.
Claim 5
Dependent Claim
39 words
A method for producing a thermoplastic resin according to claim 1, wherein the amount of organic solvent is 20 to 45 parts by weight per 100 parts by weight of the total of said components (a), (b) and (c).
Claim 6
Dependent Claim
26 words
A method for producing a thermoplastic resin according to claim 1, wherein said organic solvent is a mixture of an aromatic solvent and an aliphatic solvent.
Claim 7
Dependent Claim
50 words
A method for producing a thermoplastic resin according to claim 5, wherein the aromatic solvent is at least one member selected from benzene, toluene, xylene, ethylbenzene and halogen derivatives thereof, and the aliphatic solvent is at least one member selected from heptane, hexane, octane, nonane, halogen derivatives thereof and naphtha.
Claim 8
Dependent Claim
27 words
A method for producing a thermoplastic resin according to claim 1, wherein the polymerization initiator is at least one member selected from benzoyl peroxide and dicumyl peroxide.
Claim 9
Dependent Claim
34 words
A method for producing a thermoplastic resin according to claim 1, wherein the suspension-polymerization is carried out in the presence of at least one member selected from divinylbenzene, triallylisocyanurate and dimethacrylate of ethylene glycol.
Claim 10
Dependent Claim
37 words
A method for producing a thermoplastic resin according to claim 1, wherein the solution is suspended in an aqueous medium in the presence of at least one member selected from polyvinyl alcohol, carboxymethyl cellulose and sodium polyacrylate.
Claim 11
Dependent Claim
33 words
A method for producing a thermoplastic resin according to claim 1, wherein the amount of the aqueous medium is 150 to 250 parts by weight per 100 parts by weight of said solution.
Claim 12
Dependent Claim
42 words
A method for producing a thermoplastic resin according to claim 1, wherein said solvent is benzene, toluene, xylene, ethylbenzene, diethylbenzene, pentane, hexane, naphtha, 3-methylpentane, 2-methylpentane, 2,2-dimethylpentane, 2,4-dimethylpentane, heptane, octane, nonane, decane, cyclopentane, cyclohexane, methylcyclopentane, methylcyclohexane, chlorobenzene, dichlorobenzene, chloroform, carbon tetrachloride or dichloromethane.
Claim 13
Independent Claim
196 words
A method for producing a thermoplastic graft copolymer resin comprising preparing a solution by dissolving 10 to 30 parts by weight of (a) at least one substantially non-polar rubbery polymer selected from the group consisting of ethylene-propylene-diene rubber, butyl rubber and mixtures thereof having an iodine value of 2 to 40, and 90 to 70 parts by weight of a vinyl monomer component including 60 to 80 percent by weight of (b) an aromatic vinyl monomer and 40 to 20 percent by weight of (c) an aliphatic vinyl monomer represented by the general formula CH 2 = C(R)X, wherein R is hydrogen, a methyl or ethyl group, and X is --CN, --COOH, --COOCH 3 or --COOC 2 H 5 , in an organic solvent capable of dissolving said non-polar rubbery polymer, the amount of solvent being 20 to 45 parts by weight per 100 parts by weight of the total of said components (a), (b) and (c); suspending 100 parts by weight of said solution in 150 to 250 parts by weight of an aqueous medium for forming a suspension of said solution suitable for suspension polymerizing; and suspension-polymerizing in the presence of a polymerization initiator.
Claim 14
Independent Claim
196 words
A method for producing a thermoplastic graft copolymer resin comprising preparing a solution by dissolving 10 to 30 parts by weight of (a) at least one substantially non-polar rubbery polymer selected from the group consisting of ethylene-propylene-diene rubber, butyl rubber and mixtures thereof having an iodine value of 2 to 40, and 90 to 70 parts by weight of a vinyl monomer component including 60 to 80 percent by weight of (b) an aromatic vinyl monomer and 40 to 20 percent by weight of (c) an aliphatic vinyl monomer represented by the general formula CH 2 = C(R)X, wherein R is hydrogen, a methyl or ethyl group, and X is --CN, --COOH, --COOCH 3 or --COOC 2 H 5 , in an organic solvent capable of dissolving said non-polar rubbery polymer, the amount of solvent being 20 to 45 parts by weight per 100 parts by weight of the total of said components (a), (b) and (c); suspending 100 parts by weight of said solution in 150 to 250 parts by weight of an aqueous medium for forming a suspension of said solution suitable for suspension polymerizing; and suspension-polymerizing in the presence of a polymerization initiator.
Claim 15
Dependent Claim
30 words
A method for producing a thermoplastic resin according to claim 12, wherein said polymerization initiator is selected from the group consisting of benzoyl peroxide, lauroyl peroxide, dicumyl peroxide, and azobisisobutyronitrile.
Claim 16
Dependent Claim
43 words
A method for producing a thermoplastic resin according to claim 12, wherein components (a), (b) and (c) are suspended in said aqueous medium by means of a suspending agent selected from the group consisting of polyvinyl alcohol, carboxymethyl cellulose, sodium polyacrylate and phosphates.
Claim 17
Dependent Claim
42 words
A method for producing a thermoplastic resin according to claim 12, wherein polymerization is accomplished in the presence of a chain transfer agent selected from the group consisting of tert-dodecyl mercaptan, n-dodecyl mercaptain, thiopropionic acid, thioglycolic acid, carbon tetrachloride and dimeric α-methylstyrene.
Claim 18
Dependent Claim
62 words
A method for producing a thermoplastic resin according to claim 12, wherein polymerization is accomplished in the presence of about 0.01 to 5.0 parts by weight per 100 parts by weight of components (a), (b) and (c) of a cross linking agent selected from the group consisting of divinylbenzene, triallycyanurate, triallylisocyanurate, triacrylformal, dimethacrylates of ethylene glycol and divinyl ethers of diethylene glycol.
Claim 19
Dependent Claim
26 words
A method for producing a thermoplastic resin according to claim 12 further comprising recovering said thermoplastic resin by filtering and thereafter washing the filtrate with water.
Claim 20
Dependent Claim
27 words
A method for producing a thermoplastic resin according to claim 12 further comprising recovering said thermoplastic resin by filtering and thereafter subjecting said filtrate to steam distillation.
Claim 21
Dependent Claim
28 words
A method for producing a thermoplastic resin according to claim 12, wherein said rubbery polymer has a Mooney viscosity, ML 1 +4 (100° C), of 25 to 120.
Claim 22
Dependent Claim
42 words
A method for producing a thermoplastic resin according to claim 1, wherein said vinyl monomer component consists essentially of 2 to 98 percent by weight of said aromatic vinyl monomer and 98 to 2 percent by weight of said aliphatic vinyl monomer.
Claim 23
Dependent Claim
41 words
A method for producing a thermoplastic resin according to claim 20, wherein said vinyl monomer component consists of 2 to 98 percent by weight of said aromatic vinyl monomer and 98 to 2 percent by weight of said aliphatic vinyl monomer.
Claim 24
Dependent Claim
42 words
A method for producing a thermoplastic resin according to claim 12, wherein said vinyl monomer component consists essentially of 60 to 80 percent by weight of said aromatic vinyl monomer and 40 to 20 percent by weight of said aliphatic vinyl monomer.
Claim 25
Dependent Claim
42 words
A method for producing a thermoplastic graft copolymer according to claim 22, wherein said vinyl monomer component consists of 60 to 80 percent by weight of said aromatic vinyl monomer and 40 to 20 percent by weight of said aliphatic vinyl monomer.
Claim 26
Dependent Claim
38 words
A method for producing a thermoplastic resin according to claim 1, wherein said solution contains 10 to 30 parts by weight of said non-polar rubbery polymer and 90 to 70 parts by weight of said vinyl monomer component.
Claim 27
Dependent Claim
42 words
A method for producing a thermoplastic resin according to claim 1, wherein said vinyl monomer component consists essentially of 60 to 80 percent by weight of said aromatic vinyl monomer and 40 to 20 percent by weight of said aliphatic vinyl monomer.
Claim 28
Dependent Claim
39 words
A method for producing a thermoplastic resin according to claim 1, wherein said solution contains 20 to 45 parts by weight of said solvent per 100 parts by weight of the total of said components (a), (b) and (c).
References Cited (Backward Citations)
US3538191A
Cited
US3538190A
Cited
US3538193A
Cited
US3538192A
Cited
US3642950A
Cited
US3819765A
Cited
US3676528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |