Patent US3879490A successfully refreshed from Google Patents.
US3879490A
Expired / Lapsed
US
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Inherently mold-releasable mold or casting composition
Assignee: ATK Launch Systems LLC
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Filing: 1974-09-10
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Granted: 1975-04-22
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Expires: 1994-09-10
Abstract
Abstract An inherently mold-releasable composition which may be used as either the casting composition or, in its cured state, the mold or as a mold liner is disclosed. No additional mold release agent is necessary when using the composition herein which is prepared from (a) hydroxyl or carboxyl-terminated polymers containing pendant 3-perfluoroalkyl-2-iodopropyl or 2-perfluoroalkyl-1iodoethyl groups, and (b) polyisocyanates or polyepoxides.
Inventors
- 👤 Jose L Villa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08G18/696; C08G18/40; C08G18/42; C08G18/46; C08G18/4607; C08G18/48; C08G18/50; C08G18/5003; C08G18/5015; C08G18/5018; C08L; C08L63/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A mold, which requires no mold release agent, in which at least the surface that contacts a casting composition comprises a cured fluorocarbon-containing polyether prepared from polyepoxides having epoxide functionality of approximately two epoxide groups per molecule and an hydroxyl terminated polymer; wherein said hydroxyl-terminated polymers contain pendant vinyl or allyl groups and wherein at least some of said pendant groups are converted to 2-perfluoroalkyl-1-iodoethyl groups or 3-perfluoroalkyl-2-iodopropyl groups to provide a fluorine content of from 1 to 40 percent.
Claim 2
Dependent Claim
80 words
A mold, which requires no mold release agent, in which at least the surface that contacts a casting composition comprises a cured fluorocarbon-containing polyether prepared from polyepoxides having epoxide functionality of approximately two epoxide groups per molecule and an hydroxyl terminated polymer; wherein said hydroxyl-terminated polymers contain pendant vinyl or allyl groups and wherein at least some of said pendant groups are converted to 2-perfluoroalkyl-1-iodoethyl groups or 3-perfluoroalkyl-2-iodopropyl groups to provide a fluorine content of from 1 to 40 percent.
Claim 3
Dependent Claim
80 words
A MOLD, WHICH REQUIRES NO MOLD RELEASE AGENT, IN WHICH AT LEAST THE SURFACE THAT CONTACTS A CASTING COMPOSITION COMPRISES A CURED FLUOROCARBON-CONTAINING POLYETHER PREPARED FROM POLYEPOXIDES HAVING EPOXIDE FUNCTIONALITY OF APPROXIMATELY TWO EPOXIDE GROUPS ER MOLECULE AND AN HYDROXYL TERMINATED POLYMER, WHEREIN SAID HYDROXYL-TERMINATED POLYMERS CONTAIN PENDANT VINYL OR ALLYL GROUPS AND WHEREIN AT LEAST SOME OF SAID PENDANT GROUPS ARE ONVERTED TO 2PERFLUOROALKYL-L-IODOETHYL GROUP OR 3-PERFLUOROALKYL-2IODOPROPYL GROUPS TO PROVIDE A FLUOROINE CONTENT OF FROM 1 TO 40 PERCENT.
Claim 4
Dependent Claim
80 words
A MOLD, WHICH REQUIRES NO MOLD RELEASE AGENT, IN WHICH AT LEAST THE SURFACE THAT CONTACTS A CASTING COMPOSITION COMPRISES A CURED FLUOROCARBON-CONTAINING POLYETHER PREPARED FROM POLYEPOXIDES HAVING EPOXIDE FUNCTIONALITY OF APPROXIMATELY TWO EPOXIDE GROUPS ER MOLECULE AND AN HYDROXYL TERMINATED POLYMER, WHEREIN SAID HYDROXYL-TERMINATED POLYMERS CONTAIN PENDANT VINYL OR ALLYL GROUPS AND WHEREIN AT LEAST SOME OF SAID PENDANT GROUPS ARE ONVERTED TO 2PERFLUOROALKYL-L-IODOETHYL GROUP OR 3-PERFLUOROALKYL-2IODOPROPYL GROUPS TO PROVIDE A FLUOROINE CONTENT OF FROM 1 TO 40 PERCENT.
Claim 5
Dependent Claim
33 words
The mold of claim 1 wherein the hydroxyl-terminated polymers having pendant vinyl or allyl groups are selected from the group consisting of polybutadiene polymers, polybutadiene copolymers, polyether polymers, polyester polymers, and polysulfide polymers.
Claim 6
Dependent Claim
18 words
The mold of claim 2 wherein the hydroxyl-terminated polymers having pendant vinyl or allyl groups are polybutadiene polymers.
Claim 7
Dependent Claim
18 words
The mold of claim 2 wherein the hydroxyl-terminated polymers having pendant vinyl or allyl groups are butadiene/styrene copolymers.
Claim 8
Dependent Claim
15 words
The mold of claim 1 wherein the cured fluorocarbon-containing polyether polymer comprises the entire mold.
Claim 9
Dependent Claim
19 words
The mold of claim 1 wherein the cured fluorocarbon-containing polymer prior to curing contains 3-25 percent by weight fluorine.
Claim 10
Dependent Claim
19 words
The mold of claim 1 wherein the cured fluorocarbon-containing polymer prior to curing contains 6-15 percent by weight fluorine.
Claim 11
Dependent Claim
71 words
A fluorocarbon-containing polymer casting composition, which is inherently mold releasable, which comprises a polyether prepared from polyepoxides having epoxide functionality of approximately two epoxide groups per molecule and an hydroxyl terminated polymer, wherein said hydroxyl-terminated polymers contain pendant vinyl or allyl groups and wherein at least some of said pendant groups are converted to 2-perfluoroalkyl-1 iodoethyl groups or 3-perfluoroalkyl-2-iodopropyl groups to provide a fluorine content of from 1 to 40 percent.
Claim 12
Dependent Claim
71 words
A fluorocarbon-containing polymer casting composition, which is inherently mold releasable, which comprises a polyether prepared from polyepoxides having epoxide functionality of approximately two epoxide groups per molecule and an hydroxyl terminated polymer, wherein said hydroxyl-terminated polymers contain pendant vinyl or allyl groups and wherein at least some of said pendant groups are converted to 2-perfluoroalkyl-1 iodoethyl groups or 3-perfluoroalkyl-2-iodopropyl groups to provide a fluorine content of from 1 to 40 percent.
Claim 13
Dependent Claim
34 words
The casting composition of Claim 8 wherein the hydroxyl-terminated polymers having pendant vinyl or allyl groups are selected from the group consisting of polybutadiene polymers, polybutadiene copolymers, polyether polymers, polyester polymers, and polysulfide polymers.
Claim 14
Dependent Claim
19 words
The casting composition of claim 9 wherein the hydroxyl-terminated polymers having pendant vinyl or allyl groups are polybutadiene polymers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |