Patent US4319007A successfully refreshed from Google Patents.
US4319007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High melt strength polycaprolactam compositions
Assignee: Honeywell International Inc
•
Filing: 1980-03-10
•
Granted: 1982-03-09
•
Expires: 2000-03-10
Abstract
Abstract Compositions are described, which are blow-moldable into shaped articles, comprising a reaction product between polycaprolactam, aminoalkyltrialkoxysilane and a catalytic amount of water. The compositions have a melt index of about 2.25 g/10 min. or below and are substantially free of trialkoxysilane groups. Preferred compositions also contain ethylene/vinyl acetate copolymer as an impact modifier to increase the impact strength of blow-molded articles made therefrom, such as bottles.
Inventors
- 👤 Ghazi M. A. Khattab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:35
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
58 words
A composition possessing sufficient melt strength for the blow-molding of shaped articles comprising the reaction product between polycaprolactam, having a melt index of at least about 3 grams/10 minutes, aminoalkyltrialkoxysilane and a catalytic amount of water, said reaction product being substantially free of trialkoxysilane groups and said composition possessing a melt index of below about 2.25 g/10 min.
Claim 2
Dependent Claim
58 words
A composition possessing sufficient melt strength for the blow-molding of shaped articles comprising the reaction product between polycaprolactam, having a melt index of at least about 3 grams/10 minutes, aminoalkyltrialkoxysilane and a catalytic amount of water, said reaction product being substantially free of trialkoxysilane groups and said composition possessing a melt index of below about 2.25 g/10 min.
Claim 3
Dependent Claim
45 words
The composition of claim 1 wherein said aminoalkyltrialkoxysilane is of the formula: ##STR2## wherein R', R" and R"' are independently monovalent C 1 to C 18 linear or branched alkyl; R is a divalent C 1 to C 18 linear or branched alkylene or alkylenaminoalkylene.
Claim 4
Dependent Claim
18 words
The composition of claim 2 wherein said aminoalkyltrialkoxysilane is selected from the group consisting of gamma-aminopropyltrimethoxysilane and gamma-aminopropyltriethoxysilane.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein said aminoalkyltrialkoxysilane is present in about 0.01 to 1.0 weight percent of the composition.
Claim 6
Dependent Claim
33 words
A process for producing the composition of claim 1 comprising reacting polycaprolactam with an aminoalkyltrialkoxysilane in the presence of a catalytic amount of water at a temperature of about 225° to 350° C.
Claim 7
Dependent Claim
26 words
The process of claim 5 wherein said catalytic amount of water is about 0.05 to 0.3 wt. % water, based on the weight of the polycaprolactam.
Claim 8
Dependent Claim
13 words
A shaped article of manufacture produced by blow-molding the composition of claim 1.
Claim 9
Dependent Claim
21 words
The composition as recited in claim 1 wherein the polycaprolactam has a melt index of from 3 to 12 grams/10 minutes.
References Cited (Backward Citations)
US3341501A
Cited
US3673155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |