Patent US4647621A successfully refreshed from Google Patents.
US4647621A
Expired / Lapsed
US
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Thermoplastic molding material
Assignee: BASF SE
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Filing: 1984-06-28
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Granted: 1987-03-03
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Expires: 2004-06-28
Abstract
Abstract A thermoplastic molding material comprises copolymers I and II. Copolymer I is a high-impact (graft) copolymer which is derived from a monovinyl-aromatic monomer and a polymer or copolymer predominantly containing polymerized 1,3-diene units, and is present in a proportion of 0.1-1.0% by weight, based on the molding material. Copolymer II is a block copolymer with star-shaped branching, ie. a radial block copolymer, having an average of more than two branches per molecule. It is substantially derived from 55-80% by weight of a monovinyl-aromatic monomer and 20-45% by weight of a 1,3-diene monomer. The molding material may contain conventional assistants and is used for the production of blown film.
Inventors
- 👤 Juergen Pohrt
- 👤 Ruediger Matern
- 👤 Helmut Jenne
- 👤 Hermann Gausepohl
- 👤 Karl Gerberding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
189 words
A thermoplastic molding material comprising a mixture of a copolymer I and a copolymer II, copolymer I being a high-impact, graft copolymer which is derived from (a1) a monovinyl-aromatic monomer selected from the group consisting of styrene, p-methylstyrene, αmethylstyrene, 2,4-dimethyl styrene, tert.-butylstyrene and mixture of styrene and p-methyl styrene and (a2) a soft component consisting of monomers a1 grafted onto a polymer or copolymer predominantly containing 1,3-diene units, the mean particle size of said soft component being from 0.3 to 15 μm and the rubber content being from 2 to 18% by weight, based on copolymer I, and copolymer II being a block copolymer with star-shaped branching, having an average of more than 2 branches per molecule and derived from (b1) 55-80% by weight, based on II, of one or more monovinyl-aromatic monomers and (b2) 20-45% by weight, based on II, of a 1,3-diene monomer, the said monomers (b1) and (b2) each constituting a polymer segment, consisting of the particular monomer, in the branches, wherein the mount of the graft polymer I in the molding material is from 0.1 to 1% by weight, based on the weight of I+II.
Claim 2
Dependent Claim
189 words
A thermoplastic molding material comprising a mixture of a copolymer I and a copolymer II, copolymer I being a high-impact, graft copolymer which is derived from (a1) a monovinyl-aromatic monomer selected from the group consisting of styrene, p-methylstyrene, αmethylstyrene, 2,4-dimethyl styrene, tert.-butylstyrene and mixture of styrene and p-methyl styrene and (a2) a soft component consisting of monomers a1 grafted onto a polymer or copolymer predominantly containing 1,3-diene units, the mean particle size of said soft component being from 0.3 to 15 μm and the rubber content being from 2 to 18% by weight, based on copolymer I, and copolymer II being a block copolymer with star-shaped branching, having an average of more than 2 branches per molecule and derived from (b1) 55-80% by weight, based on II, of one or more monovinyl-aromatic monomers and (b2) 20-45% by weight, based on II, of a 1,3-diene monomer, the said monomers (b1) and (b2) each constituting a polymer segment, consisting of the particular monomer, in the branches, wherein the mount of the graft polymer I in the molding material is from 0.1 to 1% by weight, based on the weight of I+II.
Claim 3
Dependent Claim
12 words
A molding material as claimed in claim 1, which additionally contains polystyrene.
Claim 4
Dependent Claim
161 words
A thermoplastic molding material comprising a mixture of one or more copolymers I and one or more copolymers II, copolymer I being a high-impact graft copolymer which is derived from (a1) styrene and (a2) a soft component comprising a crosslinked polymer or copolymer containing more than 60% by weight of butadiene units, and having a particle size of from 0.3 to 15 m, and copolymer II being a radial block copolymer with star-shaped branching, having an average of more than 2 branches per molecule and derived from (b1) 55-80% by weight, based on II, of styrene or p-methylstyrene and (b2) 20-45% by weight, based on II, of a conjugated diene monomer of 4 to 8 carbon atoms, the said monomers (b1) and (b2) each constituting a polymer segment, consisting of the particular monomer, in the branches, wherein the amount of the graft copolymer I in the molding material is from 0.1 to 1% by weight, based on the weight of I+II.
Claim 5
Dependent Claim
161 words
A thermoplastic molding material comprising a mixture of one or more copolymers I and one or more copolymers II, copolymer I being a high-impact graft copolymer which is derived from (a1) styrene and (a2) a soft component comprising a crosslinked polymer or copolymer containing more than 60% by weight of butadiene units, and having a particle size of from 0.3 to 15 m, and copolymer II being a radial block copolymer with star-shaped branching, having an average of more than 2 branches per molecule and derived from (b1) 55-80% by weight, based on II, of styrene or p-methylstyrene and (b2) 20-45% by weight, based on II, of a conjugated diene monomer of 4 to 8 carbon atoms, the said monomers (b1) and (b2) each constituting a polymer segment, consisting of the particular monomer, in the branches, wherein the amount of the graft copolymer I in the molding material is from 0.1 to 1% by weight, based on the weight of I+II.
Claim 6
Dependent Claim
128 words
A thermoplastic molding material as claimed in claim 3, comprising a mixture of a copolymer I and one or more copolymers II, copolymer I being a high-impact graft copolymer which is derived from (a1) styrene and (a2) a crosslinked butadiene polymer, and copolymer II being a radial block copolymer with star-shaped branching, having an average of more than 2 branches per molecule and derived from (b1) 55-80% by weight, based on II, of styrene and (b2) 20-45% by weight, based on II, of butadiene, the said monomers (b1) and (b2) each constituting a polymer segment, consisting of the particular monomer, in the branches, wherein the amount of the graft copolymer I in the molding material is from 0.1 to 1% by weight, based on the weight of I+II.
Claim 7
Dependent Claim
18 words
A molding material as defined in claim 1, wherein the rubber contained in the copolymer I is crosslinked.
Claim 8
Dependent Claim
25 words
A molding material as defined in claim 1, wherein at least one additional polymer segment b1, b2 or mixture thereof is present in copolymer II.
Claim 9
Dependent Claim
25 words
A molding material as defined in claim 3, wherein at least one additional polymer segment b1, b2 or mixture thereof is present in copolymer II.
Claim 10
Dependent Claim
25 words
A molding material as defined in claim 4, wherein at least one additional polymer segment b1, b2 or mixture thereof is present in copolymer II.
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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) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |