US6162856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflective composition of particles with resinous binder and process for preparing same
Assignee: HB Fuller Licensing and Financing Inc
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Filing: 1999-04-07
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Granted: 2000-12-19
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Expires: 2019-04-07
Abstract
Abstract A powder coating, and a method for manufacturing a powder coating that includes high-shear mixing of powdered binder and powdered pigment while controlling the temperature of the mixture within the range between the softening temperature and the glass transition temperature of the binder or first below the glass transition temperature and then above the glass transition temperature of the binder.
Inventors
- 👤 Thomas J. Crompton
- 👤 Walter J. Blatter
- 👤 Kevin P. Poblocki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:50
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/03; C09D5/032; C08; C08J; C08J3/00; C08J3/20; C08J3/203; C09D5/36
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
A process for the manufacture of a powder coating material comprising the steps of: providing reflective particles and particulate binder comprising a polymer having a T g and a T s and a temperature span therebetween as a mixing mass within a container, mixing said mixing mass, and controlling the temperature of said mixing mass to maintain the temperature of said mixing mass at about a first temperature for a first time period, and at about a second temperature for a second time period, said first temperature being below T g and said second temperature being at or above T g , so as to produce a powder coating material that, when coated onto a surface, provides a 20° gloss measurement of at least 189.
Claim 2
Dependent Claim
125 words
A process for the manufacture of a powder coating material comprising the steps of: providing reflective particles and particulate binder comprising a polymer having a T g and a T s and a temperature span therebetween as a mixing mass within a container, mixing said mixing mass, and controlling the temperature of said mixing mass to maintain the temperature of said mixing mass at about a first temperature for a first time period, and at about a second temperature for a second time period, said first temperature being below T g and said second temperature being at or above T g , so as to produce a powder coating material that, when coated onto a surface, provides a 20° gloss measurement of at least 189.
Claim 3
Dependent Claim
36 words
A process as defined in claim 1 wherein said mixing is performed in a mixer having at least one blade with a tip, wherein the speed of said blade tip is at least about 4,500 feet/min.
Claim 4
Dependent Claim
15 words
A process as defined in claim 1 wherein said reflective particles comprise leafing metallic flakes.
Claim 5
Dependent Claim
20 words
A process as defined in claim 3 wherein said flakes comprise less than about 4% by weight of said binder.
Claim 6
Dependent Claim
120 words
A process for the manufacture of a powder coating material comprising the steps of: providing, as a mixing mass within a container, particulate binder comprising a polymer having a T g and a T s and a temperature span therebetween and reflective particles, mixing said mixing mass, and controlling the temperature of said mixing mass to maintain the temperature of said mixing mass within about 10% of said temperature span above said T g during said mixing, so as to produce a powder coating material that when coated onto a surface, provides a 20° gloss measurement of at least 189 wherein said reflective flakes are present from about 0.5 parts to about 12 parts per 100 parts of said binder.
Claim 7
Dependent Claim
120 words
A process for the manufacture of a powder coating material comprising the steps of: providing, as a mixing mass within a container, particulate binder comprising a polymer having a T g and a T s and a temperature span therebetween and reflective particles, mixing said mixing mass, and controlling the temperature of said mixing mass to maintain the temperature of said mixing mass within about 10% of said temperature span above said T g during said mixing, so as to produce a powder coating material that when coated onto a surface, provides a 20° gloss measurement of at least 189 wherein said reflective flakes are present from about 0.5 parts to about 12 parts per 100 parts of said binder.
Claim 8
Dependent Claim
43 words
The process of claim 5 wherein sufficient heat is removed from said mixing mass during said mixing that the average temperature of the mixing mass remains more than 2° C. below said T g of the polymer in powder coating during said mixing.
Claim 9
Dependent Claim
43 words
The process of claim 5 wherein sufficient heat is removed from said mixing mass during said mixing that the average temperature of the mixing mass remains more than 5° C. below said T g of the polymer in powder coating during said mixing.
Claim 10
Dependent Claim
29 words
The process of claim 5 wherein said mixing is performed with blades in a mixer, and the speed of the blades at its tips are at least 4,500 feet/min.
Claim 11
Dependent Claim
37 words
The process of claim 5 wherein sufficient heat is removed from said mixing mass during said mixing by means comprising a step selected from the group consisting of cooling of a mixing container and stopping said mixing.
Claim 12
Dependent Claim
46 words
A process as defined in claim 5 wherein sufficient heat is removed from said mixing mass during said mixing to maintain an average temperature of said mixing mass at a temperature selected from the group consisting of above Tg, at or about Tg and combinations thereof.
Claim 13
Dependent Claim
39 words
A process as defined in claim 5 wherein sufficient heat is removed from said mixing mass during said mixing to maintain an average temperature of said mixing mass within about 1% of said temperature span above T g .
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) | 2003-12-19 | 2004-06-19 | 2004-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-19 | 2008-06-19 | 2008-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-19 | 2012-06-19 | 2012-12-19 | $7700.00 | Window Closed / Lapsed |