GB533497A - Improvements in and relating to synthetic resins and to articles made therefrom - Google Patents
Improvements in and relating to synthetic resins and to articles made therefromInfo
- Publication number
- GB533497A GB533497A GB13666/39A GB1366639A GB533497A GB 533497 A GB533497 A GB 533497A GB 13666/39 A GB13666/39 A GB 13666/39A GB 1366639 A GB1366639 A GB 1366639A GB 533497 A GB533497 A GB 533497A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- methyl methacrylate
- mixture
- methacrylic anhydride
- vinyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
533,497. Vinyl polymerization products. NORTON GRINDING WHEEL CO., Ltd. May 8, 1939, No. 13666. Convention date, Jan. 30. [A Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 8, 1939.] [Class 2 (iii)] Synthetic resins suitable for optical purposes and abrasives, are prepared by polymerizing, by known methods, a mixture of methyl methacrylate with methacrylic and/or acrylic anhydrides. A copolymer of methyl methacrylate and 5 per cent. of methacrylic anhydride is infusible and insoluble; a resin produced with 10 per cent. of methacrylic anhydride is suitable for shaping by grinding and polishing operations to produce an optical element. An abrasive article, e.g. a grinding wheel, may be produced from a mixture of abrasive grains with methyl methacrylate and 20 per cent. of methacrylic anhydride polymerized by heat in a suitable mould. Optical properties of the resin, e.g. refractive index, may be modified by the addition of a further polymerizable substance to the monomeric mixture e.g. nitroethylene, triphenylmethyl acrylate or methacrylate, o, m, or p-nitro-styrene, vinyl chloride, vinyl acetate or furyl vinyl ketone, or of a non-polymerizable substance having a high index of refraction, e.g. triphenylbenzene.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US533497XA | 1939-01-30 | 1939-01-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB533497A true GB533497A (en) | 1941-02-14 |
Family
ID=21983591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13666/39A Expired GB533497A (en) | 1939-01-30 | 1939-05-08 | Improvements in and relating to synthetic resins and to articles made therefrom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB533497A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3239493A (en) * | 1961-05-15 | 1966-03-08 | Rohm & Haas | Poly(acrylic methacrylic anhydrides and acids) |
-
1939
- 1939-05-08 GB GB13666/39A patent/GB533497A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3239493A (en) * | 1961-05-15 | 1966-03-08 | Rohm & Haas | Poly(acrylic methacrylic anhydrides and acids) |
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