US4508675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nylon composition for use in rotational molding
Assignee: Honeywell International Inc
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Filing: 1983-02-08
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Granted: 1985-04-02
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Expires: 2003-02-08
Abstract
Abstract A rotational moldable polyamide composition, a method of preparing the composition, and a method of rotational molding. The composition contains from about 0.001 percent to about 0.5 percent by weight of a copper compound, preferably cuprous iodide. Preferably, the composition contains from about 0.001 percent to about 0.3 percent by weight of potassium iodide.
Inventors
- 👤 Peter P. Salatiello
- 👤 Frank Petrucelli
- 👤 Paul W. Flood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:13
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/003; C; C08; C08K; C08K3/00; C08K3/16; B29C41/02; B29C41/04; B29K; B29K2077/00; B29K2105/00; B29K2105/25; B29K2105/251
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
70 words
A method of rotationally molding a polyamide article in a rotational molding mold comprising the steps of: feeding an unwashed polyepsiloncaprolactam composition to the cavity of the rotational mold, wherein the composition comprises polyepsiloncaprolactam, from about 0.001 percent to about 0.5 percent, by weight of the polyepsiloncaprolactam, of a copper compound, and from about 0.001 percent to about 0.3 percent by weight potassium iodide; and rotationally molding the polyepsiloncaprolactam composition.
Claim 2
Independent Claim
70 words
A method of rotationally molding a polyamide article in a rotational molding mold comprising the steps of: feeding an unwashed polyepsiloncaprolactam composition to the cavity of the rotational mold, wherein the composition comprises polyepsiloncaprolactam, from about 0.001 percent to about 0.5 percent, by weight of the polyepsiloncaprolactam, of a copper compound, and from about 0.001 percent to about 0.3 percent by weight potassium iodide; and rotationally molding the polyepsiloncaprolactam composition.
Claim 3
Dependent Claim
52 words
The method as recited in claim 1 further comprising the preparation of the polyepsiloncaprolactam composition by the further steps of: physically mixing the polyepsiloncaprolactam and the copper compound; and melt blending the mixture at a temperature higher than the melt temperature of the polyepsiloncaprolactam and less than about 282° C. (540° F.).
Claim 4
Dependent Claim
14 words
The method as recited in claim 2 wherein the copper compound is cuprous iodide.
Claim 5
Dependent Claim
22 words
The method as recited in claim 1 wherein the polyepsiloncaprolactam has more chain ends terminated with acid groups than with amine groups.
Claim 6
Dependent Claim
17 words
The method as recited in claim 1 wherein the cavity of the mold contains an inert atmosphere.
Claim 7
Dependent Claim
22 words
The method as recited in claim 1 wherein the polyepsiloncaprolactam further comprise from about 8 percent to about 12 percent caprolactam monomer.
Claim 8
Dependent Claim
22 words
The method as recited in claim 1 wherein the polyepsiloncaprolactam further comprise from about 0.01 percent to about 0.1 percent potassium iodide.
Claim 9
Dependent Claim
25 words
The method as recited in claim 1 wherein the copper compound is selected from the group consisting of cupric acetate, cupric chloride, and cuprous chloride.
Claim 10
Dependent Claim
23 words
The method as recited in claim 1 wherein the composition is heated to between 288° C. (550° F.) and 399° C. (750° F.).
Claim 11
Dependent Claim
27 words
The method as recited in claim 1 wherein there is from about 0.01 percent to about 0.5 percent by weight of the polyespiloncaprolactam, of the copper compound.
Claim 12
Dependent Claim
25 words
The method as recited in claim 1 wherein there is from 0.01 percent to about 0.05 percent by weight of the polyepsiloncaprolactam, of cuprous iodide.
Claim 13
Dependent Claim
16 words
The method as recited in claim 1 wherein the polyepsiloncaprolactam is in the form of pellets.
Claim 14
Dependent Claim
71 words
The method as recited in claim 1 wherein the step of rotational molding further comprises; feeding polyamide pellets to the cavity of the rotational mold, wherein the pellets comprise a polyamide and from about 0.01 percent to about 0.5 percent, by weight of the polyamide, of a copper compound; rotating the mold simultaneously along two perpindicular axes; heating the composition within the mold; cooling the mold; and removing the molded article.
Claim 15
Independent Claim
80 words
A method of rotationally molding a polyamide article in a rotational molding mold comprising the steps of: feeding a polyepsiloncaprolactam composition to the cavity of the rotational mold, wherein the composition comprises polyepsiloncaprolactam, from about 8 percent to about 20 percent caprolactam monomer, from about 0.001 percent to about 0.5 percent, by weight of the polyepsiloncaprolactam of a copper compound, and from about 0.001 percent to about 0.3 percent by weight of potassium iodide; and rotationally molding the polyepsiloncaprolactam composition.
Claim 16
Independent Claim
80 words
A method of rotationally molding a polyamide article in a rotational molding mold comprising the steps of: feeding a polyepsiloncaprolactam composition to the cavity of the rotational mold, wherein the composition comprises polyepsiloncaprolactam, from about 8 percent to about 20 percent caprolactam monomer, from about 0.001 percent to about 0.5 percent, by weight of the polyepsiloncaprolactam of a copper compound, and from about 0.001 percent to about 0.3 percent by weight of potassium iodide; and rotationally molding the polyepsiloncaprolactam composition.
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) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |