Compositions – Light transmission modifying compositions
Patent
1997-04-25
1999-10-05
Mosley, Terressa
Compositions
Light transmission modifying compositions
252587, 252589, 528 85, 528377, C08G 7500
Patent
active
059618892
ABSTRACT:
A process for producing a polythiol oligomer having disulfide linkages by reacting polythiol (with the functionality of two or above) with sulfur in a molar ratio of m to (m-1) (where m is an integer of 2 to 21) in the presence of a basic catalyst, whereby the oligomers produced have a degree of oligomerization of m (wherein m is defined as above). Specifically disclosed is a process for reacting 2,5-dimercaptomethyl-1,4-dithiane (DMMD) with sulfur in a molar ratio 2:1 or 3:2 in the presence of a basic catalyst, thereby producing an oligomer represented by the below formula: ##STR1## (wherein n is an integer of up to 21). Also disclosed are optical polymers made with the oligomer and optical materials and devices made with the polymer.
REFERENCES:
patent: 2237625 (1941-04-01), Olin
patent: 3219638 (1965-11-01), Warner
patent: 5326501 (1994-07-01), Ohkubo et al.
patent: 5403938 (1995-04-01), Ohkubo et al.
patent: 5464931 (1995-11-01), Shaw et al.
patent: 5565517 (1996-10-01), Efner et al.
B. D. Vineyard, "The Versatility and the Mechanism of the n-Butylamine-Catalyzed Reaction of Thiols with Sulfur", Dec. 1967, J. Org. Chem., vol. 32, 3833-3836.
Journal of Applied Polymer Science, vol. 23, No. 9, pp. 2757-2761, "Kinetic of the Base-Catalyzed Reactions of Cyclooctameric Sulfur with Dithiol", B. K. Bordoloi et al, XP002042192.
Journal of Organic Chemistry, vol. 32, Dec. 1967, pp. 3833-3836, XP002042193, "The Versatility and the Mechanism of the N-Butylamine-Catal. Reaction of Thiols with Sulfur", B. D. Vineyard.
Chemical Abstracts, vol. 123, No. 35, 1995, Abstract No. 113212x, p. 33, col. 2, XP002042194, and JP 07 117 263 A (Hoya).
Jiang Jian
Kosaka Masahisa
Hoya Corporation
Mosley Terressa
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