US5686312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determining emissions from powder coatings
Assignee: Vibrantz Corp
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Filing: 1996-01-29
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Granted: 1997-11-11
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Expires: 2016-01-29
Abstract
Abstract A method for reducing residue formation caused by volatile materials during the curing of powder coating compositions which includes the steps of applying different powder coating compositions to separate bases; placing each coated base in a separate extraction chamber; placing each separate extraction chamber in a curing oven; heating the coated base in its respective extraction chamber in the curing oven to curing temperature to cure the coating composition, and simultaneously flowing a stream of air through the respective extraction chamber to capture volatile emissions from the volatile materials in the air stream during the curing process; simultaneously flowing the respective stream of air out of the curing oven and chilling the stream to condense the volatile emissions from each of the compositions to a collectable form; determining the quantity of the emitted product from each of the compositions; and comparing the quantity of emitted product from each of the compositions to determine the composition that produced the least emissions.
Inventors
- 👤 Robert W. Huff
- 👤 Susan M. Miller
- 👤 Joanne M. Szydlowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:46
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/12; G01N2030/121; G01N2030/125; Y; Y10; Y10T; Y10T436/00; Y10T436/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
205 words
A method for reducing residue formation caused by vapor-producing materials during curing of powder coating compositions by minimizing the quantity of a vapor-producing materials that is required in the initial curable powder coating composition, comprising the steps of: a. preparing a plurality of curable powder coating compositions with varying quantities of a vapor-producing materials and applying each of said compositions to a separate base; b. placing each coated base in a separate extraction chamber; c. placing each separate extraction chamber in a curing oven; d. heating said coated base in its respective extraction chamber, in said curing oven to curing temperature to cure said coating, and simultaneously flowing a stream of air through said respective extraction chamber to capture volatile emissions from said vapor-producing materials in said air stream during said curing process; e. simultaneously flowing said respective stream of air out of said curing oven and chilling said stream to condense said volatile emissions from each of said compositions to a collectable form; f. determining the quantity of said emitted product from each of said compositions; and g. comparing the quantity of emitted product from each of said compositions that produce a satisfactorily cured coating, to determine the composition that produced the least emissions.
Claim 2
Independent Claim
205 words
A method for reducing residue formation caused by vapor-producing materials during curing of powder coating compositions by minimizing the quantity of a vapor-producing materials that is required in the initial curable powder coating composition, comprising the steps of: a. preparing a plurality of curable powder coating compositions with varying quantities of a vapor-producing materials and applying each of said compositions to a separate base; b. placing each coated base in a separate extraction chamber; c. placing each separate extraction chamber in a curing oven; d. heating said coated base in its respective extraction chamber, in said curing oven to curing temperature to cure said coating, and simultaneously flowing a stream of air through said respective extraction chamber to capture volatile emissions from said vapor-producing materials in said air stream during said curing process; e. simultaneously flowing said respective stream of air out of said curing oven and chilling said stream to condense said volatile emissions from each of said compositions to a collectable form; f. determining the quantity of said emitted product from each of said compositions; and g. comparing the quantity of emitted product from each of said compositions that produce a satisfactorily cured coating, to determine the composition that produced the least emissions.
Claim 3
Dependent Claim
14 words
A method as defined in claim 1 wherein said vapor-producing material is dodecanedioic acid.
Claim 4
Dependent Claim
16 words
A method as defined in claim 1 wherein said powder coating composition includes an acrylic resin.
Claim 5
Dependent Claim
19 words
A method as defined in claim 1 wherein the quantity of said collected condensate is determined by gas chromatography.
Claim 6
Independent Claim
157 words
A method for analyzing powder coating compositions to determine the quantity of excess volatile material that is vaporized during curing comprising the steps of: a. preparing a plurality of curable powder coating compositions with varying quantities of a volatile material and applying each of said compositions to a separate substrate; b. placing each coated substrate in a separate extraction chamber; c. placing each separate extraction chamber in a curing oven; d. heating said coated substrate in its respective extraction chamber, in said curing oven to curing temperature to cure said coating, and simultaneously flowing a stream of atmosphere through said respective extraction chamber to capture volatilized emissions in said stream during said curing process; e. simultaneously flowing said respective stream out of said curing oven and chilling said stream to condense said volatile emissions from each of said compositions to a collectable form; and f. determining the quantity of said collected condensate from each of said compositions.
Claim 7
Independent Claim
157 words
A method for analyzing powder coating compositions to determine the quantity of excess volatile material that is vaporized during curing comprising the steps of: a. preparing a plurality of curable powder coating compositions with varying quantities of a volatile material and applying each of said compositions to a separate substrate; b. placing each coated substrate in a separate extraction chamber; c. placing each separate extraction chamber in a curing oven; d. heating said coated substrate in its respective extraction chamber, in said curing oven to curing temperature to cure said coating, and simultaneously flowing a stream of atmosphere through said respective extraction chamber to capture volatilized emissions in said stream during said curing process; e. simultaneously flowing said respective stream out of said curing oven and chilling said stream to condense said volatile emissions from each of said compositions to a collectable form; and f. determining the quantity of said collected condensate from each of said compositions.
Claim 8
Dependent Claim
35 words
A method as defined in claim 5 wherein said volatile material is a material selected from the group consisting of a crosslinker, a degassing agent, a deblocking agent and mixtures of two or more thereof.
Claim 9
Dependent Claim
16 words
A method as defined in claim 5 wherein said powder coating composition includes an acrylic resin.
Claim 10
Dependent Claim
19 words
A method as defined in claim 5 wherein the quantity of said collected condensate is determined by gas chromatography.
Claim 11
Dependent Claim
14 words
A method as set forth in claim 6 wherein said crosslinker comprises dodecandedioic acid.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-10 | 2001-05-12 | 2001-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-10 | 2005-05-12 | 2005-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-10 | 2009-05-12 | 2009-11-11 | $7700.00 | Window Closed / Lapsed |