Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1986-08-21
1989-08-22
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526146, 526147, 5263297, C08F 1106, C08F12018
Patent
active
048597503
ABSTRACT:
Improved method for the production of a polymer of a monofunctional (unsaturated) monomer, particularly polymethyl methacrylate, by a rapid crosslinking polymerization, which comprises polymerizing a mixture of a monofunctional (unsaturated) monomers, selected from methyl methacrylate and a monomer mixture comprising predominantly methyl methacrylate which may partially contain a polymer of the monomer (i.e. a syrup of the monomer or monomer mixture), and a polyfunctional (unsaturated) monomer in the presence of (1) a radical polymerization initiator, (2) a reducing compound containing sulfur in the molecule thereof, (3) an amine hydrohalogenate or a quaternary ammonium halide and (4) a copper-containing compound. Said polymer has high mechanical properties and excellent transparency and is useful particularly for the production of optical parts such as conventional lenses, Fresnel's lens, optical recording disc media, prisms, mirrors, etc.
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Kato Yasuyuki
Moritani Masahiko
Yasunori Yukio
Yuyama Masahiro
Kulkosky Peter F.
Schofer Joseph L.
Sumitomo Chemical Company Limited
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