Silane-functionalized ultraviolet screen precursors
Patent 4328346 Issued on May 4, 1982. Estimated Expiration Date: 
August 1, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 1, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re27281 2955128 2968643 3391109 3708225 Paint compositions Method for making certain halonium salt photoinitiators Pigment-free coating compositions Ultraviolet screening agents and coating materials containing organosilane ester groups Photoinitiators InventorsAssigneeApplicationNo. 06/174611 filed on 08/01/1980US Classes:548/110, Boron or silicon containing522/25, Specified rate-affecting material contains onium group522/31, Specified rate-affecting material contains onium group522/907, INVOLVING PRECURSOR OF AN ULTRAVIOLET ABSORBER, E.G., MONOBENZOATE, ETC.556/428, Chalcogen bonded directly to sulfur556/440Silicon and the oxy of the -COO- group are bonded directly to the same hydrocarbon groupExaminersPrimary: Shaver, Paul F.Attorney, Agent or FirmInternational ClassesC09D 4/00 (20060101)B05D 7/02 (20060101) C07F 7/00 (20060101) C07F 7/18 (20060101) C08J 7/04 (20060101) C08J 7/00 (20060101) AbstractSilane-functionalized ultraviolet screening agent precursors comprise compounds of the formula: ##STR1## wherein R is ##STR2## R1 is C1 -C6 alkyl, R2 is C1 -C6 alkyl or C2 -C6 alkanoyl, R3 is hydrogen or C1 -C6 alkoxyl, X is 0,1 or 2, y is 1,2, or 3 and x+y=3. Under ultraviolet radiation the compounds rearrange to the corresponding -hydroxybenzophenones which protect substrates, especially transparent plastics, against degradation.Field of SearchChalcogen bonded directly to sulfur |
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