US3907727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dispersing carbon black in acrylate plastics
Assignee: EIDP Inc
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Filing: 1974-11-25
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Granted: 1975-09-23
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Expires: 1994-11-25
Abstract
Abstract A process for preparing acrylate sheets tinted with furnace carbon black is provided wherein said process comprises mixing a concentrate of said furnace carbon black in a compatible polymer vehicle with methyl methacrylate or methyl methacrylate sirup and nitrocellulose to provide a dispersion of said ingredients which can be cast on a substrate directly or further diluted with acrylate sirup, followed by curing the cast dispersion to provide a sheet thereof that is optically transparent and substantially free of haze.
Inventors
- 👤 Hayden Ivan Lipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K3/00; C08K3/02; C08K3/04; C08L; C08L1/00; C08L1/08; C08L1/16; C08L1/18; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08J2333/00; C08J2433/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
16 words
A PROCESS FOR PREPARING TINTED ARTICLE OF ACRYLATE POLYMERIC MATERIAL COMPRISING A. MIXING A DISPERSION OF
Claim 2
Dependent Claim
16 words
A PROCESS FOR PREPARING TINTED ARTICLE OF ACRYLATE POLYMERIC MATERIAL COMPRISING A. MIXING A DISPERSION OF
Claim 3
Dependent Claim
56 words
NOT MORE THAN 50% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID DISPERSION, OF A CONCENTRATE OF NOT MORE THAN 20% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID CONCENTRATE, OF FURNACE CARBON BLACK AND, COMPLEMENTALLY, NOT LESS THAN 80% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID CONCENTRATE, OF AN ACRYLATE POLYMER,
Claim 4
Dependent Claim
56 words
NOT MORE THAN 50% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID DISPERSION, OF A CONCENTRATE OF NOT MORE THAN 20% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID CONCENTRATE, OF FURNACE CARBON BLACK AND, COMPLEMENTALLY, NOT LESS THAN 80% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID CONCENTRATE, OF AN ACRYLATE POLYMER,
Claim 5
Dependent Claim
22 words
NOT LESS THAN 50% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID DISPERSION, OF METHYL METHACRYLATE OR METHYL METHACRYLATE SIRUP, AND
Claim 6
Dependent Claim
22 words
NOT LESS THAN 50% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID DISPERSION, OF METHYL METHACRYLATE OR METHYL METHACRYLATE SIRUP, AND
Claim 7
Dependent Claim
22 words
not less than 50% by weight, based upon the total weight of said dispersion, of methyl methacrylate or methyl methacrylate sirup, and
Claim 8
Dependent Claim
22 words
not less than 50% by weight, based upon the total weight of said dispersion, of methyl methacrylate or methyl methacrylate sirup, and
Claim 9
Dependent Claim
23 words
The process of claim 1 wherein said concentrate is prepared by high shear melt compounding said furnacE carbon black and said acrylate polymer.
Claim 10
Dependent Claim
20 words
The process of claim 2 wherein the high shear melt compounding is performed in a high shear, twin-screw melt extruder.
Claim 11
Dependent Claim
55 words
at least 0.01% by weight, based upon the total weight of said dispersion, of nitrocellulose; b. adding a polymerization catalyst to said dispersion and casting said dispersion on a substrate followed by heating said dispersion to a temperature of at least 50*C. to cure said dispersion and thereby provide said article of acrylate polymeric material.
Claim 12
Dependent Claim
55 words
at least 0.01% by weight, based upon the total weight of said dispersion, of nitrocellulose; b. adding a polymerization catalyst to said dispersion and casting said dispersion on a substrate followed by heating said dispersion to a temperature of at least 50*C. to cure said dispersion and thereby provide said article of acrylate polymeric material.
Claim 13
Dependent Claim
55 words
AT LEAST 0.01% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID DISPERSION, OF NITROCELLULOSE, B. ADDING A POLYMERIZATION CATALYST TO SAID DISPERSION AND CASTING SAID DISPERSION ON A SUBSTRATE FOLLOWED BYY HEATING SAID DISPERSION TO A TEMPERATURE OF AT LEAST 50*C. TO CURE SAID DISPERSION AND THEREBY PROVIDE SAID ARTICLE OF ACRYLATE POLYMERIC MATERIAL.
Claim 14
Dependent Claim
55 words
AT LEAST 0.01% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF SAID DISPERSION, OF NITROCELLULOSE, B. ADDING A POLYMERIZATION CATALYST TO SAID DISPERSION AND CASTING SAID DISPERSION ON A SUBSTRATE FOLLOWED BYY HEATING SAID DISPERSION TO A TEMPERATURE OF AT LEAST 50*C. TO CURE SAID DISPERSION AND THEREBY PROVIDE SAID ARTICLE OF ACRYLATE POLYMERIC MATERIAL.
Claim 15
Dependent Claim
18 words
The process of claim 2 wherein said acrylate polymer is a copolymer of ethyl acrylate and methyl methacrylate.
Claim 16
Dependent Claim
34 words
The process of claim 4 wherein said copolymer comprises 13% by weight, based upon the total copolymer weight, of ethyl acrylate and 87% by weight, based upon the total copolymer weight, of methyl methacrylate.
Claim 17
Dependent Claim
30 words
The process of claim 5 wherein said furnace carbon black is present in said dispersion in an amount of 0.7% by weight, based upon the total weight of said dispertion.
Claim 18
Dependent Claim
28 words
The process of claim 6 wherein said nitrocellulose is present in said dispersion in an amount of 0.2% by weight, based upon the total weight of said dispersion.
Claim 19
Dependent Claim
34 words
The process of claim 3 wherein said copolymer comprises 4.5% by weight, based upon the total copolymer weight, of ethyl acrylate and 95.5% by weight, based upon the total copolymer weight, of methyl methacrylate.
Claim 20
Dependent Claim
10 words
Tinted acrylate sheet prepared by the process of claim 1.
Claim 21
Dependent Claim
14 words
The tinted acrylate sheet of claim 9 having a haze of less than 5%.
References Cited (Backward Citations)
US2101061A
Cited
US2907722A
Cited
US2989492A
Cited
US3442851A
Cited
US3503922A
Cited
US3462390A
Cited
US3399152A
Cited
US3821138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |