Claims
- 1. A coherent article comprising a polymeric matrix filled with glass microbubbles comprising at least 5 volume percent of the polymeric matrix, wherein the improvement comprises:
- the microbubbles have an average diameter of from 5 to 200 micrometers and are stained glass, said stained glass containing metal oxides which produce a colored appearance, and
- dispersed throughout the polymeric matrix is a pigment or dye comprising from 0.04 to 0.12% by weight of the polymeric matrix.
- 2. An article as defined in claim 1 wherein the stained glass of the microbubbles has an ultraviolet window.
- 3. An article as defined in claim 2 wherein the average density of the stained-glass microbubbles is less than 0.4.
- 4. An article as defined in claim 1 wherein the microbubbles comprise from 10 to 65 volume percent of the article.
Parent Case Info
This is a division of application Ser. No. 737,524 filed May 24, 1985, U.S. Pat. No. 4,666,771.
US Referenced Citations (10)
Divisions (1)
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Number |
Date |
Country |
Parent |
737524 |
May 1985 |
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