Patent US4183843A successfully refreshed from Google Patents.
US4183843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate ester coating on inorganic fillers for polyester resins
Assignee: Alcoa Corp
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Filing: 1978-09-20
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Granted: 1980-01-15
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Expires: 1998-09-20
Abstract
Abstract An improved process for dispersing inorganic fillers, such as alumina trihydrate, in a polyester resin is disclosed wherein the improvement comprises significantly lowering the viscosity of the polyester-filler dispersion by coating the filler with 0.05 to 1.0 percent, based on the weight of the filler, of a polar phosphate ester surfactant containing acid groups and polar ether groups, prior to adding the filler to the polyester resin.
Inventors
- 👤 James J. Koenig
- 👤 H. Philip Hsieh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
73 words
A process for dispersing an inorganic filler in a polyester resin comprising: lowering the viscosity of a polyester-filler dispersion, by coating the filler with 0.05 to 1.0 percent, based on the weight of the filler, of a polar phosphate ester containing acid groups and polar ether groups; and after coating the filler, dispersing 40 to 65 percent of the filler, based on the total weight of resin and filler, with a polyester resin.
Claim 2
Dependent Claim
73 words
A process for dispersing an inorganic filler in a polyester resin comprising: lowering the viscosity of a polyester-filler dispersion, by coating the filler with 0.05 to 1.0 percent, based on the weight of the filler, of a polar phosphate ester containing acid groups and polar ether groups; and after coating the filler, dispersing 40 to 65 percent of the filler, based on the total weight of resin and filler, with a polyester resin.
Claim 3
Dependent Claim
30 words
A method as set forth in claim 1 wherein the filler is coated with 0.2 to 0.4 percent of a polar phosphate ester containing acid groups and polar ether groups.
Claim 4
Dependent Claim
28 words
A method as set forth in claim 1 wherein the inorganic filler is selected from the group consisting of alumina trihydrate, calcium carbonate, titanium dioxide, clay and silica.
Claim 5
Dependent Claim
22 words
A method as set forth in claim 1 wherein the average particle size of the inorganic filler is less than 15 microns.
Claim 6
Dependent Claim
23 words
A method as set forth in claim 1 wherein 50 to 60 percent of the coated filler is dispersed with the polyester resin.
Claim 7
Dependent Claim
88 words
A process for dispersing alumina trihydrate having an average particle size less than 15 microns in a polyester resin comprising: lowering the viscosity of a polyester-trihydrate dispersion by at least 50 percent by coating alumina trihydrate with 0.2 to 0.4 percent, based on the weight of the trihydrate, of a polar phosphate ester containing acid groups and polar ether groups; and after coating the trihydrate dispersing 50 to 60 percent of the trihydrate, based on the total weight of polyester resin and alumina trihydrate, with the polyester resin.
Claim 8
Dependent Claim
88 words
A process for dispersing alumina trihydrate having an average particle size less than 15 microns in a polyester resin comprising: lowering the viscosity of a polyester-trihydrate dispersion by at least 50 percent by coating alumina trihydrate with 0.2 to 0.4 percent, based on the weight of the trihydrate, of a polar phosphate ester containing acid groups and polar ether groups; and after coating the trihydrate dispersing 50 to 60 percent of the trihydrate, based on the total weight of polyester resin and alumina trihydrate, with the polyester resin.
Claim 9
Dependent Claim
33 words
A method as set forth in claim 6 wherein the alumina trihydrate is dehydrated to reduce the initial loss on ignition thereof by from 0.2 to 5.0 percent before coating the alumina trihydrate.
Claim 10
Dependent Claim
30 words
A method as set forth in claim 7 wherein the alumina trihydrate is dehydrated to reduce the loss on ignition in a range of from about 34.0 to 34.5 percent.
Claim 11
Dependent Claim
67 words
A coated alumina trihydrate composition suitable for low viscosity dispersion with 40 to 65 percent polyester resin based on the total weight of the resin and the trihydrate, consisting essentially of alumina trihydrate having an average particle size less than 15 microns coated with 0.05 to 1.0 percent, based on the weight of the trihydrate, of a polar phosphate ester containing acid groups and polar ether groups.
Claim 12
Dependent Claim
67 words
A coated alumina trihydrate composition suitable for low viscosity dispersion with 40 to 65 percent polyester resin based on the total weight of the resin and the trihydrate, consisting essentially of alumina trihydrate having an average particle size less than 15 microns coated with 0.05 to 1.0 percent, based on the weight of the trihydrate, of a polar phosphate ester containing acid groups and polar ether groups.
Claim 13
Dependent Claim
26 words
A coated alumina trihydrate composition as set forth in claim 9 wherein the trihydrate is coated with 0.2 to 0.4 percent of the polar phosphate ester.
Claim 14
Dependent Claim
58 words
A thermosetting polyester compound comprising a polyester resin, a curing catalyst and about 40 to 65 percent alumina trihydrate, based on the total weight of the resin and the trihydrate, said alumina trihydrate coated with 0.05 to 1.0 percent, based on the weight of the trihydrate, of a polar phosphate ester containing acid groups and polar ether groups.
Claim 15
Dependent Claim
58 words
A thermosetting polyester compound comprising a polyester resin, a curing catalyst and about 40 to 65 percent alumina trihydrate, based on the total weight of the resin and the trihydrate, said alumina trihydrate coated with 0.05 to 1.0 percent, based on the weight of the trihydrate, of a polar phosphate ester containing acid groups and polar ether groups.
Claim 16
Dependent Claim
29 words
A polyester compound as set forth in claim 11 further comprising 10 to 20 percent reinforcing fiberglass strands, based on the total weight of the resin and the trihydrate.
Claim 17
Dependent Claim
24 words
A polyester compound as set forth in claim 11 wherein the trihydrate is coated with 0.2 to 0.4 percent of the polar phosphate ester.
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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |