US4614763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding compounds of thermoplastic polyamide and graft rubber
Assignee: Bayer AG
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Filing: 1985-02-04
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Granted: 1986-09-30
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Expires: 2005-02-04
Abstract
Abstract Thermoplastic moulding materials, with improved toughness at low temperatures, of polyamide and cross-linked graft rubbers from the diene rubber and acrylate rubber series, obtained by heating blends of the two components below the melting point of the polyamide.
Inventors
- 👤 Ludwig Trabert
- 👤 Rudolf Binsack
- 👤 Christian Lindner
- 👤 Josef Merten
- 👤 Heinrich Haupt
- 👤 Leo Morbitzer
- 👤 Gunter B. Weber
- 👤 Claus Wulff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:39
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
117 words
A post-treatment process for the preparation of thermoplastic molding compositions having a degree of coupling of at least 3% comprising, heating a granulated blend comprising from 65% to 97%, based on the weight of the blend, of a thermoplastic polyamide and from 3% to 35%, based on the weight of the blend, of a graft rubber selected from a diene graft rubber and an acrylate graft rubber, where the graft rubber has a gel content of at least 50%, based on the weight of the graft rubber, to a temperature of from 5° C. to 80° C. below the melting point of the thermoplastic polyamide for at least one-half hour in vacuo or under a nitrogen atmosphere.
Claim 2
Dependent Claim
117 words
A post-treatment process for the preparation of thermoplastic molding compositions having a degree of coupling of at least 3% comprising, heating a granulated blend comprising from 65% to 97%, based on the weight of the blend, of a thermoplastic polyamide and from 3% to 35%, based on the weight of the blend, of a graft rubber selected from a diene graft rubber and an acrylate graft rubber, where the graft rubber has a gel content of at least 50%, based on the weight of the graft rubber, to a temperature of from 5° C. to 80° C. below the melting point of the thermoplastic polyamide for at least one-half hour in vacuo or under a nitrogen atmosphere.
Claim 3
Dependent Claim
40 words
A post-treatment process as claimed in claim 1, wherein the granulated blend comprises from 70% to 95%, by weight of the blend, of the thermoplastic polyamide and from 5% to 30%, by weight of the blend, of the graft rubber.
Claim 4
Dependent Claim
40 words
A post-treatment process as claimed in claim 1, wherein the granulated blend comprises from 75% to 90%, by weight of the blend, of the thermoplastic polyamide and from 10% to 25%, by weight of the blend, of the graft rubber.
Claim 5
Dependent Claim
60 words
A post-treatment process as claimed in claim 1, wherein the graft rubber is obtained by the graft polymerization of 15% to 60%, by weight of the graft rubber, of a grafted monomer selected from vinyl or vinylidene monomers or combinations thereof, onto 40% to 85%, by weight of the graft rubber, of a particulate crosslinked diene rubber or acrylate rubber.
Claim 6
Dependent Claim
51 words
A post-treatment process as claimed in claim 4, wherein the graft rubber is obtained by the graft polymerization of 20% to 50%, by weight of the graft rubber, of the grafted monomer onto 50% to 80%, by weight of the graft rubber, of the particulate crosslinked diene rubber or acrylate rubber.
Claim 7
Dependent Claim
51 words
A post-treatment process as claimed in claim 4, wherein the graft rubber is obtained by the graft polymerization of 25% to 40%, by weight of the graft rubber, of the grafted monomer onto 60% to 75%, by weight of the graft rubber, of the particulate crosslinked diene rubber or acrylate rubber.
Claim 8
Dependent Claim
80 words
A post-treatment process as claimed in claim 5, wherein the grafted monomer is selected from methyl methacrylate, mixtures of styrene and methyl methacrylate having a styrene to methyl methacrylate weight ratio of 10:90 to 50:50, or mixtures of styrene and acrylonitrile having a styrene to acrylonitrile weight ratio of 90:10 to 50:50, and the particulate, crosslinked diene rubber is selected from homo or copolymers of conjugated dienes or mixtures thereof, wherein the conjugated dienes contain four to six carbon atoms.
Claim 9
Dependent Claim
80 words
A post-treatment process as claimed in claim 6, wherein the grafted monomer is selected from methyl methacrylate, mixtures of styrene and methyl methacrylate having a styrene to methyl methacrylate weight ratio of 10:90 to 50:50, or mixtures of styrene and acrylonitrile having a sytrene to acrylonitrile weight ratio of 90:10 to 50:50, and the particulate, crosslinked diene rubber is selected from homo or copolymers of conjugated dienes or mixtures thereof, wherein the conjugated dienes contain four to six carbon atoms.
Claim 10
Dependent Claim
18 words
A post-treatment process as claimed in claim 1, wherein the thermoplastic polyamide is polyamide 6 or polyamide 66.
Claim 11
Dependent Claim
20 words
A thermoplastic molding composition having a degree of coupling of at least 3%, prepared by the process of claim 1.
Claim 12
Dependent Claim
20 words
A thermoplastic molding composition having a degree of coupling of at least 3%, prepared by the process of claim 2.
Claim 13
Dependent Claim
20 words
A thermoplastic molding composition having a degree of coupling of at least 3%, prepared by the process of claim 3.
Claim 14
Dependent Claim
20 words
A thermoplastic molding composition having a degree of coupling of at least 3%, prepared by the process of claim 4.
Claim 15
Dependent Claim
20 words
A thermoplastic molding composition having a degree of coupling of at least 3%, prepared by the process of claim 5.
Claim 16
Dependent Claim
20 words
A thermoplastic molding composition having a degree of coupling of at least 3%, prepared by the process of claim 6.
Claim 17
Dependent Claim
20 words
A thermoplastic molding composition having a degree of coupling of at least 3%, prepared by the process of claim 7.
Claim 18
Dependent Claim
20 words
A thermoplastic molding composition having a degree of coupling of at least 3%, prepared by the process of claim 8.
Claim 19
Dependent Claim
20 words
A thermoplastic molding composition having a degree of coupling of at least 3%, prepared by the process of claim 9.
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) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |