Patent US4639494A successfully refreshed from Google Patents.
US4639494A
Expired / Lapsed
US
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Process for producing polystyrene
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1985-02-25
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Granted: 1987-01-27
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Expires: 2005-02-25
Abstract
Abstract In a process for producing a high impact polystyrene comprising the radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises, the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing 1,3-butadiene and styrene in the presence of an organolithium compound and a Lewis base compound, followed by further reacting the resulting polymer with a multifunctional halogen compound; in the butadiene rubber, the average content of 1,2-bonds being 18 to 32 mole % based on the total bonded butadiene, the content of bonded styrene being up to 10% by weight, and the content of branched polymer chains being at least 60% by weight; the butadiene rubber exhibiting a Mooney viscosity of 40 to 90 at 100 DEG C. and a solution viscosity in styrene of 60 to 90 cps at 25 DEG C. and at a concentration of 5% by weight; and the styrene polymerization being carried out so that the content of the butadiene rubber in the product polystyrene lies between 3 and 20% by weight.
Inventors
- 👤 Akio Imai
- 👤 Yasushi Okamoto
- 👤 Masatoshi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:14
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
203 words
In a process for producing a high impact polystyrene comprising radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing 1,3-butadiene with styrene in the presence of an organomonolithium compound and a Lewis base compound, followed by further reacting the resulting polymer with at least one multifunctional halogen compound selected from the group consisting of silicon tetrachloride, tin tetrachloride and germanium tetrachloride; in the butadiene rubber, the average content of 1,2-bonds being 18 to 32 mole % based on the total bonded butadiene, the content of bonded styrene being up to 10% by weight, and the content of branched polymer chains being at least 60% by weight; the butadiene rubber exhibiting a Mooney viscosity of 40 to 90 at 100° C. and a solution viscosity in styrene of 60 to 90 cps at 25° C. and at a concentration of 5% by weight, and the ratio of the solution viscosity (SV) to the Mooney viscosity (ML) being 0.7≦SV/ML≦1.28; and the styrene polymerization being carried out so that the content of the butadiene rubber in the product polystyrene lies between 3 and 20% by weight.
Claim 2
Dependent Claim
203 words
In a process for producing a high impact polystyrene comprising radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing 1,3-butadiene with styrene in the presence of an organomonolithium compound and a Lewis base compound, followed by further reacting the resulting polymer with at least one multifunctional halogen compound selected from the group consisting of silicon tetrachloride, tin tetrachloride and germanium tetrachloride; in the butadiene rubber, the average content of 1,2-bonds being 18 to 32 mole % based on the total bonded butadiene, the content of bonded styrene being up to 10% by weight, and the content of branched polymer chains being at least 60% by weight; the butadiene rubber exhibiting a Mooney viscosity of 40 to 90 at 100° C. and a solution viscosity in styrene of 60 to 90 cps at 25° C. and at a concentration of 5% by weight, and the ratio of the solution viscosity (SV) to the Mooney viscosity (ML) being 0.7≦SV/ML≦1.28; and the styrene polymerization being carried out so that the content of the butadiene rubber in the product polystyrene lies between 3 and 20% by weight.
Claim 3
Dependent Claim
28 words
A process according to claim 1, wherein the average content of 1,2-bonds in the butadiene rubber is 20 to 30 mole % based on the total bonded butadiene.
Claim 4
Dependent Claim
23 words
A process according to claim 1, wherein the content of branched polymer chain in the butadiene rubber is 80% or more by weight.
Claim 5
Dependent Claim
46 words
A process according to claim 1, wherein 0.5 to 3 mmol of the organomonolithium compound per 100 g of the 1,3-butadiene and 0.01 to 1.00 mole of the Lewis base compound per mole of the organomonolithium compound are used in the production of the butadiene rubber.
Claim 6
Dependent Claim
25 words
A process according to claim 1, wherein the multifunctional halogen compound is used in an amount of at least 0.6 equivalent to the organolithium compound.
Claim 7
Dependent Claim
19 words
A process according to claim 1, wherein the organomonolithium compound is ethyllithium, n-butyllithium, stearyllithium, allyllithium, cyclohexyllithium, phenyllithium or benzyllithium.
Claim 8
Dependent Claim
26 words
A process according to claim 1, wherein the Lewis base compound is dibutylether, ethyleneglycol dimethyl ether, ethyleneglycol dibutyl ether, diethyleneglycol dibutyl ether, triethylamine, tributylamine, or N,N,N',N'-tetramethylethylenediamine.
Claim 9
Dependent Claim
29 words
A process according to claim 1, wherein the polymerization of 1,3-butadiene or copolymerization of 1,3-butadiene with styrene is conducted at 30° to 80° C. for 1 to 6 hours.
Claim 10
Dependent Claim
31 words
A process according to claim 1, wherein the further reaction of butadiene rubber with the multifunctional halogene compound is conducted at 30° to 80° C. for 5 minutes to 1 hour.
Claim 11
Dependent Claim
31 words
A process according to claim 1, wherein the radical polymerization of styrene in the presence of the butadiene rubber is conducted by the known bulk polymerization or bulk-suspension combined polymerization method.
Claim 12
Dependent Claim
187 words
In a process for producing a high impact polystyrene comprising radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing 1,3-butadiene with styrene in the presence of an organomonolithium compound and a Lewis base compound, followed by further reacting the resulting polymer with silicone tetrachloride; in the butadiene rubber, the average content of 1,2-bonds being 18 to 32 mole % based on the total bonded butadiene, the content of bonded styrene being up to 10% by weight, and the content of branched polymer chains being at least 60% by weight; the butadiene rubber exhibiting a Mooney Viscosity of 40 to 90 at 100° C. and a solution viscosity in styrene of 60 to 90 cps at 25° C. and at a concentration of 5% by weight, and the ratio of the solution viscosity (SV) to the Mooney viscosity (ML) being 0.7≦SV/ML ≦1.28; and the styrene polymerization being carried out so that the content of the butadiene rubber in the product polystyrene lies between 3 and 20% by weight.
Claim 13
Dependent Claim
187 words
In a process for producing a high impact polystyrene comprising radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing 1,3-butadiene with styrene in the presence of an organomonolithium compound and a Lewis base compound, followed by further reacting the resulting polymer with silicone tetrachloride; in the butadiene rubber, the average content of 1,2-bonds being 18 to 32 mole % based on the total bonded butadiene, the content of bonded styrene being up to 10% by weight, and the content of branched polymer chains being at least 60% by weight; the butadiene rubber exhibiting a Mooney Viscosity of 40 to 90 at 100° C. and a solution viscosity in styrene of 60 to 90 cps at 25° C. and at a concentration of 5% by weight, and the ratio of the solution viscosity (SV) to the Mooney viscosity (ML) being 0.7≦SV/ML ≦1.28; and the styrene polymerization being carried out so that the content of the butadiene rubber in the product polystyrene lies between 3 and 20% by weight.
Claim 14
Dependent Claim
186 words
In a process for producing a high impact polystyrene comprising radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing 1,3-butadiene with styrene in the presence of an organomonolithium compound and a Lewis base compound, followed by further reacting the resulting polymer with tin tetrachloride; in the butadiene rubber, the average content of 1,2-bonds being 1% to 32 mole % based on the total bonded butadiene, the content of bonded styrene being up to 10% by weight, and the content of branched polymer chains being at least 80% by weight; the butadiene rubber exhibiting a Mooney viscosity of 40 to 90 at 100° C. and a solution viscosity in styrene of 60 to 90 cps at 25° C. and at a concentration of 5% by weight, and the ratio of the solution viscosity (SV) to the Mooney viscosity (ML) being 0.7≦SV/ML≦1.28; and the styrene polymerization being carried out so that the content of the butadiene rubber in the product polystyrene lies between 3 and 20% by weight.
Claim 15
Dependent Claim
186 words
In a process for producing a high impact polystyrene comprising radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing 1,3-butadiene with styrene in the presence of an organomonolithium compound and a Lewis base compound, followed by further reacting the resulting polymer with tin tetrachloride; in the butadiene rubber, the average content of 1,2-bonds being 1% to 32 mole % based on the total bonded butadiene, the content of bonded styrene being up to 10% by weight, and the content of branched polymer chains being at least 80% by weight; the butadiene rubber exhibiting a Mooney viscosity of 40 to 90 at 100° C. and a solution viscosity in styrene of 60 to 90 cps at 25° C. and at a concentration of 5% by weight, and the ratio of the solution viscosity (SV) to the Mooney viscosity (ML) being 0.7≦SV/ML≦1.28; and the styrene polymerization being carried out so that the content of the butadiene rubber in the product polystyrene lies between 3 and 20% by weight.
Claim 16
Dependent Claim
186 words
In a process for producing a high impact polystyrene comprising radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing 1,3-butadiene with styrene in the presence of an organomonolithium compound and a Lewis base compound, followed by further reacting the resulting polymer with germanium tetrachloride; in the butadiene rubber, the average content of 1,2-bonds being 18 to 32 mole % based on the total bonded butadiene, the content of bonded styrene being up to 10% by weight, and the content of branched polymer chains being at least 60% by weight; the butadiene rubber exhibiting a Mooney viscosity of 40 to 90 at 100° C. and a solution viscosity in styrene of 60 to 90 cps at 25° C. and at a concentration of 5% by weight, and the ratio of the solution viscosity (SV) to the Mooney viscosity (ML) being 0.7≦SV/ML≦1.28; and the styrene polymerization being carried out so that the content of the butadiene rubber in the product polystyrene lies between 3 and 20% by weight.
Claim 17
Dependent Claim
186 words
In a process for producing a high impact polystyrene comprising radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing 1,3-butadiene with styrene in the presence of an organomonolithium compound and a Lewis base compound, followed by further reacting the resulting polymer with germanium tetrachloride; in the butadiene rubber, the average content of 1,2-bonds being 18 to 32 mole % based on the total bonded butadiene, the content of bonded styrene being up to 10% by weight, and the content of branched polymer chains being at least 60% by weight; the butadiene rubber exhibiting a Mooney viscosity of 40 to 90 at 100° C. and a solution viscosity in styrene of 60 to 90 cps at 25° C. and at a concentration of 5% by weight, and the ratio of the solution viscosity (SV) to the Mooney viscosity (ML) being 0.7≦SV/ML≦1.28; and the styrene polymerization being carried out so that the content of the butadiene rubber in the product polystyrene lies between 3 and 20% by weight.
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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |