Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Patent
1982-04-30
1985-01-22
Shaver, Paul F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
524266, 428447, 556442, C07F 708, C07F 718
Patent
active
044953607
ABSTRACT:
A method is provided for making certain methoxy-substituted silyl benzophenones useful as ultraviolet light absorbing agents for silicone hardcoat formulations. The methoxy-substituted benzophenones have been found to more readily equilibrate into silicone hardcoat formulations without adversely affecting the shelf-life of the resulting formulation. The ultraviolet light absorbing agents are obtained by equilibrating a mixture of methanol and trialkoxysilyl-substituted benzophenone in the presence of an acid catalyst. The resulting UV stabilized silicon hardcoat formulations also provide silicone hardcoated plastic articles having improved thermoformability, resistance to abrasion, and environmental degradation.
REFERENCES:
patent: 3352896 (1967-11-01), Dressler et al.
patent: 3395116 (1968-07-01), Dressler et al.
patent: 4051161 (1977-09-01), Proskow
patent: 4277287 (1981-07-01), Frye
patent: 4278804 (1981-07-01), Ashby et al.
Bazant et al., "Organosilicon Compounds", vol. 1, Academic Press, N.Y. (1965), p. 58.
Noll, "Chemistry and Technology of Silicons", Academic Press, N.Y. (1968), p. 646.
Davis Jr. James C.
General Electric Company
Magee Jr. James
Shaver Paul F.
Teoli William A.
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