US4221879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact-resistant polyamide moulding compositions
Assignee: Bayer AG
•
Filing: 1978-09-18
•
Granted: 1980-09-09
•
Expires: 1998-09-18
Abstract
Abstract Thermoplastic moulding compositions with improved notched impact strength consisting of a polyamide and a graft product of polybutadiene or copolymers of butadiene as graft substrate and of a mixture of an ester of (meth)acrylic acid, (meth)acrylonitrile and/or (meth)acrylamide as graft monomers.
Inventors
- 👤 Gert Humme
- 👤 Friedrich Fahnler
- 👤 Dieter Neuray
- 👤 Karl-Heinz Ott
- 👤 Peter Tacke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:02
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
A polyamide mounding composition, comprising a polymer mixture consisting substantially of (I) 40 to 99.5% by weight of at least one polyamide having a relative viscosity (determined on a 1% solution in m-cresol at 25° C.) of from 2.3 to 5; and (II) 0.5 to 60% by weight of a graft product prepared from (a) 34 to 95% by weight of a cross-linked polymer selected from the group consisting of butadiene, substituted butadiene and mixtures thereof, with up to 40% by weight of a comonomer selected from the group consisting of styrene, acrylonitrile, an ester of acrylic acid and mixtures thereof as a graft substrate and (b) 5 to 66% by weight of graft monomers consisting of (α) 3 to 100% by weight of an ester of (meth)acrylic acid, (β) 0 to 80% by weight of (meth)acrylamide, and (γ) 0 to 80% by weight of (meth)acrylonitrile, the sum of (I) and (II), of (a) and (b) and of (α)-(γ) in each case being substantially 100% by weight.
Claim 2
Dependent Claim
167 words
A polyamide mounding composition, comprising a polymer mixture consisting substantially of (I) 40 to 99.5% by weight of at least one polyamide having a relative viscosity (determined on a 1% solution in m-cresol at 25° C.) of from 2.3 to 5; and (II) 0.5 to 60% by weight of a graft product prepared from (a) 34 to 95% by weight of a cross-linked polymer selected from the group consisting of butadiene, substituted butadiene and mixtures thereof, with up to 40% by weight of a comonomer selected from the group consisting of styrene, acrylonitrile, an ester of acrylic acid and mixtures thereof as a graft substrate and (b) 5 to 66% by weight of graft monomers consisting of (α) 3 to 100% by weight of an ester of (meth)acrylic acid, (β) 0 to 80% by weight of (meth)acrylamide, and (γ) 0 to 80% by weight of (meth)acrylonitrile, the sum of (I) and (II), of (a) and (b) and of (α)-(γ) in each case being substantially 100% by weight.
Claim 3
Dependent Claim
32 words
A moulding composition as claimed in claim 1, wherein the polymer mixture consists substantially of 60 to 95% by weight of component (I) and 5 to 40% by weight of component (II).
Claim 4
Dependent Claim
31 words
A moulding composition as claimed in claim 1, wherein component (II) is prepared from 50 to 90% by weight of component (a) and 10 to 50% by weight of component (b).
Claim 5
Dependent Claim
35 words
A moulding composition as claimed in claim 1, wherein component (b) consists substantially of 10 to 100% by weight of component (α) and 0 to 60% by weight of each of components (β) and (γ).
Claim 6
Dependent Claim
19 words
A moulding composition as claimed in claim 1 wherein the graft monomers are esters of acrylic acid and acrylonitrile.
Claim 7
Dependent Claim
22 words
A moulding composition as claimed in claim 5, wherein the ester of acrylic acid is the ethyl-, n-butyl-, tert.-butyl-octyl- or ethylhexyl acrylate.
Claim 8
Dependent Claim
15 words
A moulding composition as claimed in claim 1, wherein the polyamide is polyamide-6 or polyamide-6,6.
Claim 9
Dependent Claim
13 words
Impact-resistant moulded products produced from a moulding composition as claimed in claim 1.
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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |