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US4115508A
Expired / Lapsed
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Polymers and rotationally molding same
Assignee: Phillips Petroleum Co
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Filing: 1977-05-31
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Granted: 1978-09-19
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Expires: 1997-05-31
Abstract
Abstract A composition that can be rotationally molded with a minimum formation of bubbles comprises solid polymer, a cross-linking agent, a solid pigment in an amount to provide a surface area up to 30 m 2 /100 grams of polymer, and a transition metal catalyst residue content of less than about 3 parts per million.
Inventors
- 👤 James K. Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:50
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; B; B29; B29C; B29C41/00; B29C41/003; C08K5/00; C08K5/04; C08K5/14; B29C41/02; B29C41/04; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2105/00; B29K2105/24
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
159 words
A composition of matter comprising a solid polymer, an acetylenic diperoxy compound and a carbon black wherein the solid polymer is selected from the group consisting of ethylene hompolymers, copolymers of ethylene and at least one acyclic mono-1 olefin hydrocarbon having 3 to 8 carbon atoms per molecule, and mixtures thereof, wherein the amount of the acetylenic diperoxy compound is a crosslinking amount and the acetylenic diperoxy compound is selected from the group consisting of hexynes having the formula ##STR3## octynes having the formula ##STR4## and octadiynes having the formula ##STR5## wherein R is selected from the group consisting of tertiary alkyl, alkyl carbonate, and benzoate; and wherein the amount of the carbon black is an amount to provide a surface area using nitrogen according to ASTM D 3037-76 of up to about 30 m 2 /100 g of polymer; and wherein said polymer has a transition metal catalyst residue content of less than about 3 parts per million.
Claim 2
Dependent Claim
159 words
A composition of matter comprising a solid polymer, an acetylenic diperoxy compound and a carbon black wherein the solid polymer is selected from the group consisting of ethylene hompolymers, copolymers of ethylene and at least one acyclic mono-1 olefin hydrocarbon having 3 to 8 carbon atoms per molecule, and mixtures thereof, wherein the amount of the acetylenic diperoxy compound is a crosslinking amount and the acetylenic diperoxy compound is selected from the group consisting of hexynes having the formula ##STR3## octynes having the formula ##STR4## and octadiynes having the formula ##STR5## wherein R is selected from the group consisting of tertiary alkyl, alkyl carbonate, and benzoate; and wherein the amount of the carbon black is an amount to provide a surface area using nitrogen according to ASTM D 3037-76 of up to about 30 m 2 /100 g of polymer; and wherein said polymer has a transition metal catalyst residue content of less than about 3 parts per million.
Claim 3
Dependent Claim
40 words
The composition of matter according to claim 1 wherein the surface area of the carbon black is less than 25 m 2 /100 g of polymer and the transition metal catalyst residue content is 2 parts per million or less.
Claim 4
Dependent Claim
31 words
The composition of matter according to claim 1 wherein the amount of the acetylenic diperoxy compound ranges from about 0.1 to about 10 weight percent based on the weight of polymer.
Claim 5
Dependent Claim
31 words
The composition of matter according to claim 1 wherein the amount of the acetylenic diperoxy compound ranges from about 0.2 to about 5 weight percent based on the weight of polymer.
Claim 6
Dependent Claim
31 words
The composition of matter according to claim 1 wherein the amount of the acetylenic diperoxy compound ranges from about 0.5 to about 1 weight percent based on the weight of polymer.
Claim 7
Dependent Claim
58 words
The composition of claim 1 wherein the polymer is polyethylene, the acetylenic diperoxy compound is 2,5-dimethyl-2,5-di(t-butylperoxy)hexyne-3, the carbon black is selected from the group of carbon blacks within groups 5 to 9 as shown in ASTM D 2516-75, and the transition metal catalyst residue is a chromium metal in an amount of 2 parts per million or less.
Claim 8
Dependent Claim
36 words
The composition of matter of claim 6 wherein the carbon black is a group 5 carbon black as shown in ASTM D 2516-75 and the chromium catalyst residue content is 1 part per million or less.
Claim 9
Independent Claim
174 words
A method for reducing the formation of bubbles in rotationally molded articles comprising rotationally molding a composition of matter comprising a solid polymer, an acetylenic diperoxy compound and a solid pigment wherein the solid polymer is selected from the group consisting of ethylene homopolymers, copolymers of ethylene and at least one acyclic mono-1 olefin hydrocarbon having 3 to 8 carbon atoms per molecule, and mixtures thereof, wherein the amount of the acetylenic diperoxy compound is a crosslinking amount and the acetylenic diperoxy compound is selected from the group consisting of hexynes having the formula ##STR6## octynes having the formula ##STR7## and octadiynes having the formula ##STR8## wherein R is selected from the group consisting of tertiary alkyl, alkyl carbonate, and benzoate; and wherein the amount of the solid pigment is an amount to provide a surface area using nitrogen according to ASTM D 3037-76 of up to about 30 m 2 /100 g of polymer; and wherein said polymer has a transition metal catalyst residue content of less than about 3 parts per million.
Claim 10
Independent Claim
174 words
A method for reducing the formation of bubbles in rotationally molded articles comprising rotationally molding a composition of matter comprising a solid polymer, an acetylenic diperoxy compound and a solid pigment wherein the solid polymer is selected from the group consisting of ethylene homopolymers, copolymers of ethylene and at least one acyclic mono-1 olefin hydrocarbon having 3 to 8 carbon atoms per molecule, and mixtures thereof, wherein the amount of the acetylenic diperoxy compound is a crosslinking amount and the acetylenic diperoxy compound is selected from the group consisting of hexynes having the formula ##STR6## octynes having the formula ##STR7## and octadiynes having the formula ##STR8## wherein R is selected from the group consisting of tertiary alkyl, alkyl carbonate, and benzoate; and wherein the amount of the solid pigment is an amount to provide a surface area using nitrogen according to ASTM D 3037-76 of up to about 30 m 2 /100 g of polymer; and wherein said polymer has a transition metal catalyst residue content of less than about 3 parts per million.
Claim 11
Dependent Claim
22 words
The method of claim 8 wherein the rotational molding temperature ranges from about 350° to about 700° F. (177° to 371° C.).
Claim 12
Dependent Claim
22 words
The method of claim 8 wherein the rotational molding temperature ranges from about 450° to about 625° F. (232° to 329° C.).
Claim 13
Dependent Claim
22 words
The method of claim 8 wherein the rotational molding temperature ranges from about 525° to about 625° F. (274° to 329° C.).
Claim 14
Dependent Claim
37 words
The method of claim 8 wherein the surface area of the solid pigment is less than 25 m 2 /100 g of polymer and the transition metal catalyst residue content is 2 parts per million or less.
Claim 15
Dependent Claim
28 words
The method of claim 8 wherein the amount of the acetylenic diperoxy compound ranges from about 0.1 to about 10 weight percent based on the weight of polymer.
Claim 16
Dependent Claim
27 words
The method of claim 8 wherein the amount of the acetylenic diperoxy compound ranges from about 0.2 to 5 weight percent based on the weight of polymer.
Claim 17
Dependent Claim
28 words
The method of claim 8 wherein the amount of the acetylenic diperoxy compound ranges from about 0.5 to about 1 weight percent based on the weight of polymer.
Claim 18
Dependent Claim
58 words
The method of claim 8 wherein the polymer is polyethylene, the acetylenic diperoxy compound is 2,5-dimethyl-2,5-di(t-butylperoxy)hexyne-3, the solid pigment is selected from the group of carbon blacks within groups 5 to 9 as shown in ASTM D 2516-75, and the transition metal catalyst residue is a chromium metal in an amount of 2 parts per million or less.
Claim 19
Dependent Claim
34 words
The method of claim 16 wherein the carbon black is a group 5 carbon black as shown in ASTM D 2516-75 and the chromium catalyst residue content is 1 part per million or less.
Claim 20
Dependent Claim
31 words
A composition of matter in accordance with claim 3 wherein the amount of the acetylenic diperoxy compound is not more than about 1 weight percent based on the weight of polymer.
Claim 21
Dependent Claim
159 words
A composition of matter comprising a solid polymer, an acetylenic diperoxy compound and a solid pigment wherein the solid polymer is selected from the group consisting of ethylene homopolymers, copolymers of ethylene and at least one acyclic mono-1 olefin hydrocarbon having 3 to 8 carbon atoms per molecule, and mixtures thereof, wherein the amount of the acetylenic diperoxy compound is a crosslinking amount and the acetylenic diperoxy compound is selected from the group consisting of hexynes having the formula ##STR9## octynes having the formula ##STR10## and octadiynes having the formula ##STR11## wherein R is selected from the group consisting of tertiary alkyl, alkyl carbonate, and benzoate; and wherein the amount of the solid pigment is an amount to provide a surface area using nitrogen according to ASTM D 3037-76 of up to about 30 m 2 /100 g of polymer; and wherein said polymer has a transition metal catalyst residue content of less than about 3 parts per million.
Claim 22
Dependent Claim
159 words
A composition of matter comprising a solid polymer, an acetylenic diperoxy compound and a solid pigment wherein the solid polymer is selected from the group consisting of ethylene homopolymers, copolymers of ethylene and at least one acyclic mono-1 olefin hydrocarbon having 3 to 8 carbon atoms per molecule, and mixtures thereof, wherein the amount of the acetylenic diperoxy compound is a crosslinking amount and the acetylenic diperoxy compound is selected from the group consisting of hexynes having the formula ##STR9## octynes having the formula ##STR10## and octadiynes having the formula ##STR11## wherein R is selected from the group consisting of tertiary alkyl, alkyl carbonate, and benzoate; and wherein the amount of the solid pigment is an amount to provide a surface area using nitrogen according to ASTM D 3037-76 of up to about 30 m 2 /100 g of polymer; and wherein said polymer has a transition metal catalyst residue content of less than about 3 parts per million.
Claim 23
Dependent Claim
25 words
A composition of matter in accordance with claim 19 wherein the solid pigment is selected from the group consisting of carbon black and iron oxide.
Claim 24
Dependent Claim
29 words
A method in accordance with claim 8 wherein the amount of the acetylenic diperoxy compound is not more than about 1 weight percent based on the weight of polymer.
Claim 25
Dependent Claim
23 words
A method in accordance with claim 8 wherein the solid pigment is selected from the group consisting of carbon black and iron oxide.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |