Patent US4876127A successfully refreshed from Google Patents.
US4876127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of blow molding polyamides
Assignee: Honeywell International Inc
•
Filing: 1988-11-09
•
Granted: 1989-10-24
•
Expires: 2008-11-09
Abstract
Abstract This invention relates to a process for blow molding polyamide compositions where the molten polyamide includes an effective amount of one or more aryl phosphoryl azide compounds.
Inventors
- 👤 Yash P. Khanna
- 👤 Himangshu R. Bhattacharjee
- 👤 Rakesh Kumar
- 👤 Jon I. Williams
- 👤 John P. Sibilia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:52
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0005; C; C08; C08K; C08K5/00; C08K5/49; C08K5/5399; B29K; B29K2077/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
133 words
A process for blow molding polyamides which comprises the steps of: (a) forming a molten mixture of one or more polyamides and an effective amount of one or more aryl phosphoryl azide compunds of the formula: ##STR4## wherein: R 1 is selected from the group consisting of phenyl or phenyl substituted with one or more substituents which are inert under process conditions: and R 2 is selected from the group consisting of alkyl, haloalkyl, nitroalkyl, hydrogen, a metal or non-metal cation or R 1 substituents: (b) placing said molten mixture into a mold having a predetermined configuration: (c) introducing gas into said mold to form a hollow molten mixture preform having the configuration of said mold: and (d) cooling said molten preform to form a hollow article having the configuration of said mold.
Claim 2
Dependent Claim
133 words
A process for blow molding polyamides which comprises the steps of: (a) forming a molten mixture of one or more polyamides and an effective amount of one or more aryl phosphoryl azide compunds of the formula: ##STR4## wherein: R 1 is selected from the group consisting of phenyl or phenyl substituted with one or more substituents which are inert under process conditions: and R 2 is selected from the group consisting of alkyl, haloalkyl, nitroalkyl, hydrogen, a metal or non-metal cation or R 1 substituents: (b) placing said molten mixture into a mold having a predetermined configuration: (c) introducing gas into said mold to form a hollow molten mixture preform having the configuration of said mold: and (d) cooling said molten preform to form a hollow article having the configuration of said mold.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein at least one of said polyamides is polycaprolactam or poly hexamethylene adipamide.
Claim 4
Dependent Claim
21 words
A process according to claim 3 wherein said mixture comprises two polyamides, one of said polyamides being polycaprolactam and polyhexamethylene adipamide.
Claim 5
Dependent Claim
22 words
A process according to claim 4 wherein said mixture is heated at a temperature of from 245° C. to about 315° C.
Claim 6
Dependent Claim
49 words
A process according to claim 5 wherein said heating step is conducted in two stages, the first of which is at a temperature from about 245° C. to about 315° C., and the second of which is at a temperature of from abut 240° C. and about 315° C.
Claim 7
Dependent Claim
24 words
A process according to claim 5 wherein said first and second stages are conducted at temperatures from about 265° C. to about 305° C.
Claim 8
Dependent Claim
24 words
A process according to claim 1 wherein said polymer is heated for a period of time of from about 2 to about 20 minutes.
Claim 9
Dependent Claim
19 words
A process according to claim 7 wherein said period of time is from about 2 to about 10 minutes.
Claim 10
Dependent Claim
23 words
A process according to claim 1 wherein R 1 and R 2 are the same or different and are phenyl or substituted phenyl.
Claim 11
Dependent Claim
38 words
A process according to claim 9 wherein R 1 and R 2 are the same or different and are phenyl or phenyl substituted with one or more alkyl, halo, nitro, phenyl, phenoxy, alkylphenyl, alkoxyphenyl, phenylalkyl or alkoxy groups.
Claim 12
Dependent Claim
33 words
A process according to claim 10 wherein R 1 and R 2 are the same or different and are phenyl or phenyl substituted with one or more phenyl, alkyl, alkoxy or phenylalkyl groups.
Claim 13
Dependent Claim
31 words
A process according to claim 11 wherein R 1 and R 2 are the same or different and are phenyl or phenyl substituted with one or more alkyl or alkoxy groups.
Claim 14
Dependent Claim
16 words
A process according to claim 1 wherein said aryl phosphoryl azide compound is diphenyl phosphoryl azide.
Claim 15
Dependent Claim
19 words
A process according to claim 1 wherein said mixture is heated in the absence or substantial absence of water.
Claim 16
Dependent Claim
29 words
A process according to claim 14 wherein the amount of water in said mixture is less than about 0.1 weight percent based on the total weight of the mixture.
Claim 17
Dependent Claim
25 words
A process according to claim 1 wherein the amount of aryl phosphoryl azide compound is at least about 0.1 percent by weight of the mixture.
Claim 18
Dependent Claim
19 words
A process according to claim 16 wherein said amount is from about 0.1 to about 10 weight percent by
Claim 19
Dependent Claim
19 words
A process according to claim 16 wherein said amount is from about 0.2 to about 5 percent by weight.
Claim 20
Dependent Claim
19 words
A process according to claim 18 wherein said amount is from about 0.2 to about 2 percent by weight.
Claim 21
Dependent Claim
9 words
An article formed by the process of claim 1.
References Cited (Backward Citations)
GB569184A
Cited
US3509107A
Cited
US3860559A
Cited
US4299945A
Cited
US4666649A
Cited
US4740335A
Cited
US4798697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |