Patent US5219925A successfully refreshed from Google Patents.
US5219925A
Expired / Lapsed
US
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Mold release composition and method of coating a mold core
Assignee: TSE Industries Inc
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Filing: 1992-07-21
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Granted: 1993-06-15
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Expires: 2012-07-21
Abstract
Abstract An aqueous reaction mixture of a multi-functional polydimethyl siloxane emulsified polymer, a methyl triethoxy silane, a mixture of substituted nonyl or octyl phenol derivative surfactants and synthetic ethoxylated amine surfactants, and ethanol. The reaction mixture is coated on a mold core surface and cured with heat to form a mold release surface that can be used in excess of twenty times prior to recoating.
Inventors
- 👤 William D. Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:34
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; C; C09; C09D; C09D183/00; C09D183/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
An aqueous mold release composition for use in coating compression and injection molding core surfaces in contact with urethanes, silicones, natural rubber, neoprene and other synthetic elastomer, the composition comprising by weight: ______________________________________
0.5 to 12%
a silane selected from the group consisting of
methyl triethoxy silane, methyl trimethoxy
silane, vinyl triethoxy silane and vinyl
trimethoxy silane,
1 to 8% a multi functional polydimethyl siloxane
emulsified polymer,
0.1 to 2.5%
substituted nonyl or octyl phenol derivative
surfactant,
0.1 to 2.5%
synthetic ethoxylated amine surfactant,
1 to 8% ethanol and
70 to 97% water.
______________________________________
Claim 2
Dependent Claim
94 words
An aqueous mold release composition for use in coating compression and injection molding core surfaces in contact with urethanes, silicones, natural rubber, neoprene and other synthetic elastomer, the composition comprising by weight: ______________________________________
0.5 to 12%
a silane selected from the group consisting of
methyl triethoxy silane, methyl trimethoxy
silane, vinyl triethoxy silane and vinyl
trimethoxy silane,
1 to 8% a multi functional polydimethyl siloxane
emulsified polymer,
0.1 to 2.5%
substituted nonyl or octyl phenol derivative
surfactant,
0.1 to 2.5%
synthetic ethoxylated amine surfactant,
1 to 8% ethanol and
70 to 97% water.
______________________________________
Claim 3
Dependent Claim
48 words
The aqueous mold release composition according to claim 1 wherein the composition comprises a mixture of less than ten percent by weight of methyl triethoxy silane, multifunctional polydimenthyl siloxane, emulsified polymer and the surfactant mixture together with about three percent by weight of ethanol and the remainder water.
Claim 4
Dependent Claim
16 words
The aqueous mold release composition according to claim 1 wherein the silane is methyl triethoxy silane.
Claim 5
Dependent Claim
34 words
The aqueous mold release composition according to claim 1 wherein the multifunctional polydimethyl siloxane emulsified polymer is a mixture of deca methyl cyclopenta siloxane, octa methyl cyclotetra siloxane, and dodeca methyl cyclo hexa siloxane.
Claim 6
Dependent Claim
71 words
An aqueous mold release composition for use in coating compression and injection molding core surfaces comprising a mixture of less than ten percent by weight of a silane selected from the group consisting of methyl triethoxy silane, methyl trimethoxy silane, vinyl triethoxy silane and vinyl trimethoxy silane, a multifunctional polydimethyl siloxane emulsified polymer, a surfactant compatible with the silane and siloxane, and about 2 to 4% ethanol and the remainder water.
Claim 7
Dependent Claim
71 words
An aqueous mold release composition for use in coating compression and injection molding core surfaces comprising a mixture of less than ten percent by weight of a silane selected from the group consisting of methyl triethoxy silane, methyl trimethoxy silane, vinyl triethoxy silane and vinyl trimethoxy silane, a multifunctional polydimethyl siloxane emulsified polymer, a surfactant compatible with the silane and siloxane, and about 2 to 4% ethanol and the remainder water.
Claim 8
Dependent Claim
16 words
The aqueous mold release composition according to claim 5 wherein the silane is methyl triethoxy silane.
Claim 9
Dependent Claim
30 words
The aqueous mold release composition according to claim 5 wherein the siloxane is a mixture of deca methyl cyclopenta siloxane, octa methyl cyclotetra siloxane and dodeca methyl cyclo hexa siloxane.
Claim 10
Dependent Claim
26 words
The aqueous mold release composition according to claim 5 wherein the surfactant is a mixture of substituted nonyl or octyl phenol derivatives and synthetic ethoxylated amine.
Claim 11
Dependent Claim
19 words
The aqueous mold release composition according to claim 5 wherein the ethanol is present at about 3% by weight.
Claim 12
Dependent Claim
54 words
The aqueous mold release composition according to claim 5 wherein the composition comprises by weight about: 3% methyl triethoxy silane, 1.8% deca methyl cyclopenta siloxane, 1.6% octa methyl cyclotetra siloxane, 0.6% dodeca methyl cyclo hexa siloxane, 1.5% mixture of synthetic ethoxylated amines and nonyl or octyl phenol derivative surfactants, 3.0% ethanol and 88.5% water.
Claim 13
Independent Claim
91 words
A method of forming a semi-permanent mold release surface on a mold core comprising cleaning the core surfaces, heating both sides of the core surfaces to about 320 degrees F. and spraying the mold core with an aqueous composition containing less than ten percent by weight of a mixture of a silane selected from the group consisting of methyl triethoxy silane, methyl trimethoxy silane, vinyl triethoxy silane and vinyl triethoxy silane, a multi-functional polydimethyl silicone emulsified polymer, and a surfactant, about 2 to 4% by weight, ethanol and the remainder water.
Claim 14
Independent Claim
91 words
A method of forming a semi-permanent mold release surface on a mold core comprising cleaning the core surfaces, heating both sides of the core surfaces to about 320 degrees F. and spraying the mold core with an aqueous composition containing less than ten percent by weight of a mixture of a silane selected from the group consisting of methyl triethoxy silane, methyl trimethoxy silane, vinyl triethoxy silane and vinyl triethoxy silane, a multi-functional polydimethyl silicone emulsified polymer, and a surfactant, about 2 to 4% by weight, ethanol and the remainder water.
References Cited (Backward Citations)
US3684756A
Cited
US3894881A
Cited
US3905823A
Cited
US4049873A
Cited
USRE32318E
Cited
US4532096A
Cited
US4534928A
Cited
US4624899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |