US3998767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast curing of arylene sulfide polymer using hexamethoxymethylmelamine
Assignee: Phillips Petroleum Co
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Filing: 1975-09-02
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Granted: 1976-12-21
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Expires: 1995-09-02
Abstract
Abstract Hexamethoxymethylmelamine is incorporated into arylene sulfide polymer. The resulting composition is precured to give a polymer of improved processability and/or applied to a substrate and cured under less severe conditions than would be required without the additive. Alternatively, high temperature processing can be utilized to give a foamed product.
Inventors
- 👤 Roger J. Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:31
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08L; C08L81/00; C08L81/02; C08J2381/00; C08J2381/02; C08L61/00; C08L61/20; C08L61/26; C08L61/28
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
26 words
A composition of matter comprising an arylene sulfide polymer and 0.05 to 10 weight percent based on the weight of said arylene sulfide polymer of hexamethoxymethylmelamine.
Claim 2
Dependent Claim
26 words
A composition of matter comprising an arylene sulfide polymer and 0.05 to 10 weight percent based on the weight of said arylene sulfide polymer of hexamethoxymethylmelamine.
Claim 3
Dependent Claim
30 words
A composition according to claim 1 wherein said hexamethoxymethylmelamine is present in an amount within the range of 0.1 to 5 weight percent based on the weight of said polymer.
Claim 4
Dependent Claim
12 words
A composition according to claim 2 wherein said polymer is poly(phenylene sulfide).
Claim 5
Dependent Claim
17 words
A composition of matter comprising an arylene sulfide polymer and an effective cure accelerating amount of hexamethoxymethylmelamine.
Claim 6
Dependent Claim
17 words
A composition of matter comprising an arylene sulfide polymer and an effective cure accelerating amount of hexamethoxymethylmelamine.
Claim 7
Independent Claim
46 words
A method for precuring an arylene sulfide polymer comprising incorporating into said polymer 0.05 to 10 weight percent based on the weight of said arylene sulfide polymer of hexamethoxymethylmelamine and heating the resulting composition to a temperature sufficient to lower the melt flow of said polymer.
Claim 8
Independent Claim
46 words
A method for precuring an arylene sulfide polymer comprising incorporating into said polymer 0.05 to 10 weight percent based on the weight of said arylene sulfide polymer of hexamethoxymethylmelamine and heating the resulting composition to a temperature sufficient to lower the melt flow of said polymer.
Claim 9
Dependent Claim
16 words
A method according to claim 5 wherein said precuring is carried out solely during melt blending.
Claim 10
Dependent Claim
36 words
A method according to claim 6 wherein said melt blending is melt extrusion and said melt extrusion is carried out at a temperature of 545° to 600° F. for a time of 1 to 30 minutes.
Claim 11
Dependent Claim
29 words
A method according to claim 7 wherein said melt extrusion is carried out at a temperature of 550° to 575° F. for a time of 2 to 5 minutes.
Claim 12
Dependent Claim
37 words
A method according to claim 5 wherein said polymer having said hexamethoxymethylmelamine incorporated therein is heated in air after said incorporation at a temperature of 490° to 600° F. for a time of 1 to 10 hours.
Claim 13
Dependent Claim
58 words
A coated article formed by applying a composition comprising an arylene sulfide polymer and 0.05 to 10 weight percent based on the weight of said polymer of hexamethoxymethylmelamine to a substrate and curing said thus-coated substrate at a temperature within the range of 490° to 600° F. for a time within the range of 1 to 40 minutes.
Claim 14
Dependent Claim
58 words
A coated article formed by applying a composition comprising an arylene sulfide polymer and 0.05 to 10 weight percent based on the weight of said polymer of hexamethoxymethylmelamine to a substrate and curing said thus-coated substrate at a temperature within the range of 490° to 600° F. for a time within the range of 1 to 40 minutes.
Claim 15
Dependent Claim
18 words
An article according to claim 10 wherein said temperature is within the range of 550° to 570° F.
Claim 16
Dependent Claim
12 words
An article according to claim 10 wherein said polymer is poly(phenylene sulfide).
Claim 17
Independent Claim
44 words
A method of producing a foamed arylene sulfide polymer comprising incorporating into said polymer 0.05 to 10 weight percent based on the weight of said polymer of hexamethoxymethylmelamine and heating the resulting composition to a temperature within the range of 605° to 700° F.
Claim 18
Independent Claim
44 words
A method of producing a foamed arylene sulfide polymer comprising incorporating into said polymer 0.05 to 10 weight percent based on the weight of said polymer of hexamethoxymethylmelamine and heating the resulting composition to a temperature within the range of 605° to 700° F.
Claim 19
Dependent Claim
14 words
A method according to claim 13 wherein said temperature is 610° to 675° F.
Claim 20
Dependent Claim
12 words
A method according to claim 14 wherein said polymer is poly(phenylene sulfide).
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) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |