Claims
- 1. A color concentrate for acrylic glasses, suitable for dispersion in an acrylic glass for coloring the same, said concentrate comprising from 10 to 70 percent by weight of a pigment mechanically dispersed in from 90 to 30 percent by weight of a colorless polymeric binder having a reduced viscosity from 10 to 70 ml/g in CHCl.sub.3 at 20.degree. C., the binder being pre-formed by the bulk polymerization, under anhydrous conditions which preserve moisture-sensitive epoxy groups therein, of a monomer mixture consisting essentially of
- (a) 70-90 percent, by weight of the polymer, of methyl methacrylate,
- (b) 10-20 percent, by weight of the polymer, of methyl acrylate, and
- (c) 0.1-10 percent, by weight of the polymer, of a free radically polymerizable monomer of the formula ##STR5## wherein R.sub.1 is hydrogen or methyl and R.sub.2 is ##STR6##
- 2. A color concentrate as in claim 1 wherein said binder has a reduced viscosity between 10 ml/g and 70 ml/g.
- 3. A color concentrate as in claim 1 wherein the ratio by weight of component (a) to component (b) is from 6:1 to 3.3:1.
- 4. A color concentrate as in claim 1 wherein the ratio by weight between the components (a), (b), and (c) is 4.2.+-.0.7:1:0.3.+-.0.2.
- 5. A color concentrate as in claim 1 wherein component (c) is present in an amount from 1 to 6 percent by weight of the polymer.
Priority Claims (1)
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Date |
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33 23 951.7 |
Jul 1983 |
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Parent Case Info
This application is a continuation of Ser. No. 07/890,313 filed May 26, 1992 and abandoned herewith, which is a continuation of Ser. No. 07/602,050 filed Oct. 22, 1990 and now abandoned, which is a continuation of Ser. No. 07/185,415 filed Apr. 25, 1988 and now abandoned, which is a divisional of Ser. No. 07/004,239 filed Jan. 2, 1987 now U.S. 4,773,913, which is a continuation of Ser. No. 06/821,866 filed Jan. 22, 1986 and now abandoned, which is a continuation of Ser. No. 06/623,026 filed Jun. 21, 1984 and now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (5)
Number |
Date |
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1098386 |
Mar 1981 |
CAX |
2639752 |
Nov 1977 |
DEX |
2841540 |
Mar 1980 |
DEX |
2842179 |
Apr 1980 |
DEX |
1209241 |
Oct 1970 |
GBX |
Non-Patent Literature Citations (1)
Entry |
International Encyclopedia of Chemical Science, D. van Nostrand Company, Inc. Princeton, N.J. (1964), p. 930. |
Divisions (1)
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4239 |
Jan 1987 |
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Continuations (5)
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890313 |
May 1992 |
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602050 |
Oct 1990 |
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185415 |
Apr 1988 |
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821866 |
Jan 1986 |
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623026 |
Jun 1984 |
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