US5064557A
Expired / Lapsed
US
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Resin cleaner composition
Assignee: ISP CAPITAL Inc
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Filing: 1990-10-15
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Granted: 1991-11-12
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Expires: 2010-10-15
Abstract
Abstract A resin cleaner composition is provided herein for use as a cleaning solvent to remove cured, partially cured and uncured polyester or vinyl ester resin containing a free radical polymerization initiator from resin fabrication tools. The composition is characterized by the presence therein of a free radical inhibitor which suppresses the rate of free radical polymerization. Thereby the resin can be loaded in increased amounts in the composition without an accompanying increase in polymerization of the resin.
Inventors
- 👤 Frank Fusiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:25
CPC Classifications
C; C09; C09D; C09D9/00; C09D9/005; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5013; C11D7/22; C11D7/24; C11D7/26; C11D7/266; C11D7/267; C11D7/32; C11D7/3272; C11D7/3281
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
104 words
A resin cleaner and inhibitor composition for cleaning cured, partially cured and uncured unsaturated polyester or vinyl ester resin while reducing the rate of undesired in situ polymerization of such uncured, unsaturated polyester or vinyl ester resin in the presence of an organic solvent containing a free radical polymerization initiator consisting essentially of N-methyl-2-pyrrolidone solvent and at least about 0.005% by weight of the composition of a substituted phenol free radial polymerization inhibitor therein to suppress the rate of such undesired free radical polymerization with the optional presence of at least one member of the group consisting of diluents, odor masking agents and surfactants.
Claim 2
Dependent Claim
104 words
A resin cleaner and inhibitor composition for cleaning cured, partially cured and uncured unsaturated polyester or vinyl ester resin while reducing the rate of undesired in situ polymerization of such uncured, unsaturated polyester or vinyl ester resin in the presence of an organic solvent containing a free radical polymerization initiator consisting essentially of N-methyl-2-pyrrolidone solvent and at least about 0.005% by weight of the composition of a substituted phenol free radial polymerization inhibitor therein to suppress the rate of such undesired free radical polymerization with the optional presence of at least one member of the group consisting of diluents, odor masking agents and surfactants.
Claim 3
Dependent Claim
22 words
A composition according to claim 1 wherein said substituted phenol polymerization inhibitor is selected from vanillin, 4-butylcatechol, hydroquinone and butylated hydroxy toluene.
Claim 4
Dependent Claim
39 words
A composition according to claim 1 wherein said diluent is γ-butyrolactone; a dibasic acid ester selected from dimethyl adipate, dimethyl glutarate and dimethyl succinate; tetrahydrofurfuryl alcohol, propylene glycol ethers, propylene carbonate, dimethyl imidazolidinone, tetramethyl urea, terpenes, and mixtures thereof.
Claim 5
Dependent Claim
27 words
A composition according to claim 3 which includes about 30-70% by weight of the composition of N-methyl-2-pyrrolidone and about 30-70% by weight of the composition of γ-butyrolactone.
Claim 6
Dependent Claim
21 words
A composition according to claim 4 which includes about 50% by weight of N-methyl-2-pyrrolidone and about 50% by weight of γ-butyrolactone.
Claim 7
Dependent Claim
24 words
A composition according to claim 1 wherein said inhibitor is present in an amount of at least about 0.005% by weight of said composition.
Claim 8
Dependent Claim
14 words
A composition according to claim 6 wherein said amount of inhibitor is about 0.01-0.03%.
Claim 9
Dependent Claim
14 words
A composition according to claim 6 wherein said amount of inhibitor is about 0.02%.
Claim 10
Dependent Claim
64 words
A resin cleaner composition consisting put in missed data in pencil of N-methyl-2-pyrrolidone solvent, at least about 0.005% by weight of the composition of a substituted phenol free radical polymerization inhibitor, about 0-95% by weight of the composition of a diluent, about 0-1.5% by weight of the composition of a surfactant, and about 0-0.2% by weight of the composition of an odor masking agent.
Claim 11
Dependent Claim
64 words
A resin cleaner composition consisting put in missed data in pencil of N-methyl-2-pyrrolidone solvent, at least about 0.005% by weight of the composition of a substituted phenol free radical polymerization inhibitor, about 0-95% by weight of the composition of a diluent, about 0-1.5% by weight of the composition of a surfactant, and about 0-0.2% by weight of the composition of an odor masking agent.
Claim 12
Dependent Claim
71 words
A composition according to claim 9 consisting essentially of about 30-70% by weight of the composition of N-methyl-2-pyrrolidone solvent, about 30-70% by weight of the composition of a diluent selected from γ-butyrolactone; a dibasic acid ester selected from dimethyl adipate, dimethyl glutarate and dimethyl succinate; tetrahydrofurfuryl alcohol, propylene glycol ethers, propylene carbonate, dimethyl imidazolidinone, tetramethyl urea, terpenes, and mixtures thereof, and about 0.01-0.03% by weight of the composition of said inhibitor.
Claim 13
Dependent Claim
15 words
A composition according to claim 10 which includes about 0.2-1.0% by weight of a surfactant.
Claim 14
Dependent Claim
17 words
A composition according to claim 11 which includes about 0.05-0.15% by weight of an odor masking agent.
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) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |