US4405748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-impact polyamide moulding compositions
Assignee: Bayer AG
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Filing: 1981-06-26
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Granted: 1983-09-20
•
Expires: 2001-06-26
Abstract
Abstract Optionally reinforced moulding compositions with high impact strength comprising polyamides and graft products of (co)polymers of butadiene and grafted units of methyl(meth)acrylate.
Inventors
- 👤 Werner Nielinger
- 👤 Christian Lindner
- 👤 Ulrich Grigo
- 👤 Rudolf Binsack
- 👤 Friedrich Fahnler
- 👤 Bert Brassat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:19
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04; C08L77/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A thermoplastic moulding composition comprising: (I) from more than 35 to less than 99% by weight of polyamide; and (II) from more than 1 to less than 65% by weight of a graft product produced from (a) 70 to 95% by weight of a cross-linked (co)polymer of butadiene and/or substituted butadiene, which consists of at least 95% by weight of optionally substituted butadiene units, as the graft substrate and (b) 5 to 30% by weight of methyl methacrylate as graft monomer, the gel content of the graft substrate amounting to ≧70%, as measured in toluene, the grafting yield G to ≧0.15 and the average particle diameter of the graft copolymer to between 0.2 and 0.6μ; optionally (III) from 10 to 60% by weight, based on the total moulding composition, of reinforcing materials; and optionally (IV) standard auxiliaries and additives, the total sums of I to IV and of (a) and (b), respectively, amounting always to 100% by weight.
Claim 2
Dependent Claim
158 words
A thermoplastic moulding composition comprising: (I) from more than 35 to less than 99% by weight of polyamide; and (II) from more than 1 to less than 65% by weight of a graft product produced from (a) 70 to 95% by weight of a cross-linked (co)polymer of butadiene and/or substituted butadiene, which consists of at least 95% by weight of optionally substituted butadiene units, as the graft substrate and (b) 5 to 30% by weight of methyl methacrylate as graft monomer, the gel content of the graft substrate amounting to ≧70%, as measured in toluene, the grafting yield G to ≧0.15 and the average particle diameter of the graft copolymer to between 0.2 and 0.6μ; optionally (III) from 10 to 60% by weight, based on the total moulding composition, of reinforcing materials; and optionally (IV) standard auxiliaries and additives, the total sums of I to IV and of (a) and (b), respectively, amounting always to 100% by weight.
Claim 3
Dependent Claim
28 words
Moulding compositions as claimed in claim 1, comprising from 50 to 97% by weight of the component I and from 3 to 50% by weight of component II.
Claim 4
Dependent Claim
26 words
Moulding compositions as claimed in claim 1, comprising from 65 to 95% by weight of component I from 5 to 35% by weight of component II.
Claim 5
Dependent Claim
31 words
Moulding compositions as claimed in claim 1, wherein component II is produced from 75 to 90% by weight of component (a) and from 10 to 25% by weight of component (b).
Claim 6
Dependent Claim
13 words
Moulding compositions as claimed in claim 1, wherein component (a) is a polybutadiene.
Claim 7
Dependent Claim
11 words
Moulding compositions as claimed in claim 1 reinforced with glass fibres.
References Cited (Backward Citations)
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US4221879A
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CA1121541A
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DE2906222A1
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US4338406A
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US4338409A
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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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |