Patent US5124371A successfully refreshed from Google Patents.
US3868434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer composition and process
Assignee: Huntsman Chemical Corp
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Filing: 1967-05-23
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Granted: 1975-02-25
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Expires: 1987-05-23
Abstract
Abstract Impact vinyl aromatic polymer compositions are provided which comprise vinyl aromatic polymers reinforced by the incorporation or dispersion therein of at least one percent by weight on the total polymer weight of a polybutadiene having a cis butadiene content of at least 25 percent and a 1,2-addition butadiene content of not more than about ten percent. Processes for their production are also provided. These polymer compositions are useful in molding many consumer articles such as containers, refrigerator liners, sheet, trays, etc.
Inventors
- 👤 Richard C Westphal
- 👤 Paul Heinig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:00
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
178 words
A MOLDABLE MONOVINYL AROMATIC POLYMER COMPOSITION FORMED BY THE POLYMERIZATION OF (A) AT LEAST ONBE MONOVINYL AROMATIC MONOMER, (B) 0 TO ABOUT 30 PERCENT BY WEIGHT OF THE TOTAL MONOMER WEIGHT OF A COPOLYMERIZABLE MONOMER OF THE GROUP CONSISTING OF ESTERS OF ACRYLIC AND METHACRYLIC ACIDS, ACRYLONITRILE, AND ESTERS OF ITACONIC ACID, AND (C) A RUBBERY 1,4-POLYBUTADIENE, (1) BY DISSOLVING SAID RUBBERY 1,4POLYBUTADIENE IN SAID MONOMERS AND (2) BY POLYMERIZING SAID MONOMERS UNDER FREE-RADICAL POLYMERIZATION CONDITIONS UNTIL THE POLYMERIZATION OF SAID MONOMERS IS SUBSTANTIALLY COMPLETED, SAID POLYMERIZATION CARRIED OUT EMPLOYING MASS POLYMERIZATION TECHNIQUES UNDER AGITATION CONDITIONS TO PROVIDE A DISPERSED AND SUBSTANTIALLY UNIFORM COMPOSITION; SAID 1,4POLYBUTADIENE BEING PRESENT IN AN AMOUNT OF FROM 1 PERCENT TO ABOUT 20 PERCENT, BASED ON THE TOTAL FINAL POLYMER COMPOSITION WEIGHT, SAID AMOUNT OF 1,4 POLYBUTADIENE BEING EFFECTIVE IN SUBSTANTIALLY ENHANCING THE IMPACT VALUE OF SAID POLYMER COMPOSITION, AND SAID 1,4-POLYBUTADIENE CHARACTERIZED BY HAVING A CIS BUTADIENE CONTENT OF AT LEAST 25 PERCENT AND A 1,2-ADDITION BUTADIENE CONTENT OF NOT MORE THAN ABOUT 10 PERCENT BASED ON THE WEIGHT OF SAID 1,4-POLYBUTADIENE.
Claim 2
Dependent Claim
178 words
A MOLDABLE MONOVINYL AROMATIC POLYMER COMPOSITION FORMED BY THE POLYMERIZATION OF (A) AT LEAST ONBE MONOVINYL AROMATIC MONOMER, (B) 0 TO ABOUT 30 PERCENT BY WEIGHT OF THE TOTAL MONOMER WEIGHT OF A COPOLYMERIZABLE MONOMER OF THE GROUP CONSISTING OF ESTERS OF ACRYLIC AND METHACRYLIC ACIDS, ACRYLONITRILE, AND ESTERS OF ITACONIC ACID, AND (C) A RUBBERY 1,4-POLYBUTADIENE, (1) BY DISSOLVING SAID RUBBERY 1,4POLYBUTADIENE IN SAID MONOMERS AND (2) BY POLYMERIZING SAID MONOMERS UNDER FREE-RADICAL POLYMERIZATION CONDITIONS UNTIL THE POLYMERIZATION OF SAID MONOMERS IS SUBSTANTIALLY COMPLETED, SAID POLYMERIZATION CARRIED OUT EMPLOYING MASS POLYMERIZATION TECHNIQUES UNDER AGITATION CONDITIONS TO PROVIDE A DISPERSED AND SUBSTANTIALLY UNIFORM COMPOSITION; SAID 1,4POLYBUTADIENE BEING PRESENT IN AN AMOUNT OF FROM 1 PERCENT TO ABOUT 20 PERCENT, BASED ON THE TOTAL FINAL POLYMER COMPOSITION WEIGHT, SAID AMOUNT OF 1,4 POLYBUTADIENE BEING EFFECTIVE IN SUBSTANTIALLY ENHANCING THE IMPACT VALUE OF SAID POLYMER COMPOSITION, AND SAID 1,4-POLYBUTADIENE CHARACTERIZED BY HAVING A CIS BUTADIENE CONTENT OF AT LEAST 25 PERCENT AND A 1,2-ADDITION BUTADIENE CONTENT OF NOT MORE THAN ABOUT 10 PERCENT BASED ON THE WEIGHT OF SAID 1,4-POLYBUTADIENE.
Claim 3
Dependent Claim
32 words
The moldable polymer composition of claim 1 wherein said 1,4-polybutadiene has a minor content greater than 25 percent of cis butadiene and a 1,2-addition butadiene content of less than about 10 percent.
Claim 4
Dependent Claim
19 words
The moldable polymer composition of claim 2 wherein said 1,4-polybutadiene has a cis butadiene content of about 35 percent.
Claim 5
Dependent Claim
19 words
The moldable polymer composition of claim 1 wherein said 1,4-polybutadiene has a cis butadiene content of about 95 percent.
Claim 6
Dependent Claim
28 words
The moldable polymer composition of claim 1 wherein said 1,4-polybutadiene is present in an amount of from 1 to about 10 percent based on the total polymer weight.
Claim 7
Dependent Claim
59 words
The moldable polymer composition of claim 1 wherein another rubbery polymer of a conjugated diene having 4-6 carbon atoms is used in place of a portion of said rubbery 1,4-polybutadiene not to exceed 80 percent thereof by weight, provided said rubbery 1, 4-polybutadiene is present in an amount of at least 1 percent based on the total polymer weight.
Claim 8
Dependent Claim
17 words
The moldable polymer composition of claim 6 wherein GR-S rubber is present as said other rubbery polymer.
Claim 9
Dependent Claim
141 words
A moldable styrene polymer composition formed by the polymerization of styrene monomer in the presence of rubbery 1,4-polybutadiene (1) by dissolving said rubbery 1,4-polybutadiene in said styrene monomer and (2) by polymerizing said styrene monomer under free-radical polymerization conditions until the polymerization of said styrene monomer is substantially completed, said polymerization carried out employing mass polymerization techniques under agitation conditions to provide a dispersed and substantially uniform composition; said 1,4-polybutadiene being present in an amount of from 1 percent to about 20 percent, based on the total final polymer composition weight, said amount of 1,4-polybutadiene being effective in substantially enhancing the impact value of said polymer composition, and said 1,4-polybutadiene characterized by having a cis butadiene content of at least 25 percent and a 1,2-addition butadiene content of not more than about 10 percent, based on the weight of said 1,4-polybutadiene.
Claim 10
Dependent Claim
141 words
A moldable styrene polymer composition formed by the polymerization of styrene monomer in the presence of rubbery 1,4-polybutadiene (1) by dissolving said rubbery 1,4-polybutadiene in said styrene monomer and (2) by polymerizing said styrene monomer under free-radical polymerization conditions until the polymerization of said styrene monomer is substantially completed, said polymerization carried out employing mass polymerization techniques under agitation conditions to provide a dispersed and substantially uniform composition; said 1,4-polybutadiene being present in an amount of from 1 percent to about 20 percent, based on the total final polymer composition weight, said amount of 1,4-polybutadiene being effective in substantially enhancing the impact value of said polymer composition, and said 1,4-polybutadiene characterized by having a cis butadiene content of at least 25 percent and a 1,2-addition butadiene content of not more than about 10 percent, based on the weight of said 1,4-polybutadiene.
Claim 11
Dependent Claim
35 words
The moldable styrene polymer composition of claim 8 wherein the 1,4-polybutadiene employed has a minor percentage greater than 25 percent of cis butadiene content and a 1,2-addition butadiene content of less than about 10 percent.
Claim 12
Dependent Claim
20 words
The moldable styrene polymer composition of claim 9 wherein the 1,4-polybutadiene has a cis butadiene content of about 35 percent.
Claim 13
Dependent Claim
31 words
The moldable styrene polymer composition of claim 8 wherein the 1,4-polybutadiene employed has a major content of cis butadiene units and a 1,2-addition butadiene content of less than about 10 percent.
Claim 14
Dependent Claim
21 words
The moldable styrene polymer composition of claim 11 wherein the 1,4-polybutadiene employed has a cis butadiene content of about 95 percent.
Claim 15
Dependent Claim
32 words
The moldable styrene polymer composition as defined in claim 8 wherein said 1,4 polybutadiene is present in an amount of from 1 to about 10 percent based on the total polymer weight.
Claim 16
Dependent Claim
34 words
The moldable styrene polymer composition as defined in claim 13 wherein said 1,4-polybutadiene is present in an amount of at least 190 parts by weight per 4683.1 parts by weight of said styrene monomer.
Claim 17
Dependent Claim
137 words
A moldable styrene polymer composition formed by the polymerization of styrene monomer in the presence of rubbery 1,4-polybutadiene (1) by dissolving said rubbery 1,4-polybutadiene in said styrene monomer and (2) by polymerizing said styrene monomer under free-radical polymerization conditions until the polymerization of said styrene monomer is substantially completed, said polymerization carried out employing mass polymerization techniques under agitation conditions to provide a dispersed and substantially uniform composition, said 1,4-polybutadiene being present in an amount of 121.8 parts by weight per 1840.5 parts by weight of said styrene monomer, said amount of 1,4-polybutadiene being effective in substantially enhancing the impact value of said polymer composition, and said 1,4-polybutadiene characterized by having a cisbutadiene content of at least 25 percent and a 1,2-addition butadiene content of not more than 10 percent, based on the weight of said 1,4-polybutadiene.
Claim 18
Dependent Claim
137 words
A moldable styrene polymer composition formed by the polymerization of styrene monomer in the presence of rubbery 1,4-polybutadiene (1) by dissolving said rubbery 1,4-polybutadiene in said styrene monomer and (2) by polymerizing said styrene monomer under free-radical polymerization conditions until the polymerization of said styrene monomer is substantially completed, said polymerization carried out employing mass polymerization techniques under agitation conditions to provide a dispersed and substantially uniform composition, said 1,4-polybutadiene being present in an amount of 121.8 parts by weight per 1840.5 parts by weight of said styrene monomer, said amount of 1,4-polybutadiene being effective in substantially enhancing the impact value of said polymer composition, and said 1,4-polybutadiene characterized by having a cisbutadiene content of at least 25 percent and a 1,2-addition butadiene content of not more than 10 percent, based on the weight of said 1,4-polybutadiene.
Claim 19
Dependent Claim
28 words
The moldable styrene polymer composition as defined in claim 15 wherein said 1,4-polybutadiene has a cisbutadiene content of 34 percent and a 1,2-addition butadiene content of 9 percent.
Claim 20
Dependent Claim
27 words
A moldable styrene polymer composition as defined in claim 15 wherein said 1,4-polybutadiene has a cisbutadiene content of 95 percent and a 1,2-addition content of 3.3 percent.
References Cited (Backward Citations)
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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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |