US4338406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-impact polyamide moulding compositions
Assignee: Bayer AG
•
Filing: 1981-07-16
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Granted: 1982-07-06
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Expires: 2001-07-16
Abstract
Abstract High impact resistant optionally reinforced moulding compositions consisting of polyamide and a graft product of polybutadiene and grafted units of t-butyl acrylate and an acrylic acid ester with 1-4 C-atoms in the alcoholic moiety.
Inventors
- 👤 John R. Sanderson
- 👤 Rudolf Binsack
- 👤 Friedrich Fahnler
- 👤 Christian Lindner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:39
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
177 words
A moulding composition comprising I. from 50 to 99% by weight of polyamides having a relative viscosity (as measured on a 1% by weight solution in m-cresol at 25° C.) of from 2.5 to 5.0 and II. from 1 to 50% by weight of graft product produced from (a) 70 to 95% by weight of a crosslinked polymer of butadiene and/or substituted butadiene, of which up to 5% by weight may optionally consist of styrene and/or an ester of (meth)acrylic acid, as the graft substrate and (b) 5 to 30% by weight of (meth)acrylates as graft monomer, characterised in that the graft monomers are a mixture of (1) from 70 to 95% by weight of an ester of acrylic acid with a primary or secondary alcohol containing from 1 to 4 carbon atoms and (2) from 5 to 30% by weight of the t-butyl ester of acrylic acid and/or methacrylic acid the sum of I and II, the sum of (a) and (b) and the sum of (1) and (2) are to amount to 100% by weight.
Claim 2
Dependent Claim
177 words
A moulding composition comprising I. from 50 to 99% by weight of polyamides having a relative viscosity (as measured on a 1% by weight solution in m-cresol at 25° C.) of from 2.5 to 5.0 and II. from 1 to 50% by weight of graft product produced from (a) 70 to 95% by weight of a crosslinked polymer of butadiene and/or substituted butadiene, of which up to 5% by weight may optionally consist of styrene and/or an ester of (meth)acrylic acid, as the graft substrate and (b) 5 to 30% by weight of (meth)acrylates as graft monomer, characterised in that the graft monomers are a mixture of (1) from 70 to 95% by weight of an ester of acrylic acid with a primary or secondary alcohol containing from 1 to 4 carbon atoms and (2) from 5 to 30% by weight of the t-butyl ester of acrylic acid and/or methacrylic acid the sum of I and II, the sum of (a) and (b) and the sum of (1) and (2) are to amount to 100% by weight.
Claim 3
Dependent Claim
26 words
A moulding composition as claimed in claim 1 containing from 10 to 60% by weight, based on the moulding compositions as a whole, of reinforcing materials.
Claim 4
Dependent Claim
11 words
A moulding composition as claimed in claim 2 containing glass fibres.
Claim 5
Dependent Claim
28 words
A moulding composition as claimed in claim 1, containing from 75 to 90% by weight of component (1), and from 10 to 25% by weight of component 2.
Claim 6
Dependent Claim
20 words
A moulding composition as claimed in claim 1, containing as grafted units a mixture of t-butyl acrylate and n-butyl acrylate.
References Cited (Backward Citations)
US3700751A
Cited
US4221879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |