GB604274A - Improvements in the manufacture of optical elements from polymerizable material - Google Patents
Improvements in the manufacture of optical elements from polymerizable materialInfo
- Publication number
- GB604274A GB604274A GB6964/44A GB696444A GB604274A GB 604274 A GB604274 A GB 604274A GB 6964/44 A GB6964/44 A GB 6964/44A GB 696444 A GB696444 A GB 696444A GB 604274 A GB604274 A GB 604274A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymerization
- mould
- alloy
- mould parts
- polymerizable material
- 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
- 239000000463 material Substances 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 230000003287 optical effect Effects 0.000 title abstract 2
- 238000006116 polymerization reaction Methods 0.000 abstract 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 abstract 1
- 239000000443 aerosol Substances 0.000 abstract 1
- OIWOHHBRDFKZNC-UHFFFAOYSA-N cyclohexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCCC1 OIWOHHBRDFKZNC-UHFFFAOYSA-N 0.000 abstract 1
- 230000004927 fusion Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000004094 surface-active agent Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910000634 wood's metal Inorganic materials 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
A method of making an optical element such as a prism from polymerizable material, e.g. styrene, cyclohexyl methacrylate or methyl methacrylate, comprises rigidly securing together mould parts 10, introducing the polymerizable material into the mould, advancing the polymerization through an initial hardening stage, releasing the mould parts from one another, and finally advancing the polymerization to substantial completion, the mould parts remaining attached to the material as the <PICT:0604274/IV(a)/1> latter shrinks. The mould parts may be secured together by an alloy 13 such as Wood's Metal or "Belmont Alloy," which may be removed as by fusion or by being mechanically scraped or pried therefrom. The initial polymerization may be carried out at 25-40 DEG C. for one to two days and the final polymerization at 80-90 DEG C. for one day. At the end of the second stage of hardening the plates 11 and 12 may be removed from the hardened product by immersing the mould and the formed prism into a hot water bath containing a surface active agent such as "Aerosol." In a modified method the removal of the alloy 13 is effected automatically by the higher temperature used in the second hardening stage.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US604274XA | 1943-04-16 | 1943-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB604274A true GB604274A (en) | 1948-07-01 |
Family
ID=22029403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6964/44A Expired GB604274A (en) | 1943-04-16 | 1944-04-14 | Improvements in the manufacture of optical elements from polymerizable material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB604274A (en) |
-
1944
- 1944-04-14 GB GB6964/44A patent/GB604274A/en not_active Expired
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