UV light stabilizer based on benzophenone

Details UV light stabilizer based on benzophenone UV light stabilizer based on benzophenone

1987-12-15

1989-04-25

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

252407, 560221, 560 8, 526313, 558400, C08K 513, C07C 69734, C08F12030

Patent

active

048248924

ABSTRACT:
Benzophenone derivatives having at least one hydroxyl group in the ortho-position relative to the carbonyl group are used for stabilizing numerous substrates against the action of UV light. 1,3-bis-(4-Benzoyl-3-hydroxyphenoxy)-2-propanol is a photo-absorber containing two benzophenone groups. Particularly suitable stabilizers are esters of this substituted propanol with unsaturated carboxylic acids, for example esters of acrylic acid and methacrylic acid. These compounds are prepared by esterifying the substituted propanol with an unsaturated acid or by esterifying the substituted propanol with a saturated acid containing a reactive methylene group and subjecting the product to subsequent condensation with a keto compound. They can be polymerized and are suitable for the preparation of homopolymers and copolymers.

REFERENCES:
patent: 3291837 (1966-12-01), Goldberg et al.
patent: 3341493 (1967-09-01), Goldberg et al.
patent: 3365421 (1968-01-01), Horton et al.
patent: 3580927 (1971-05-01), Wear
patent: 3676471 (1972-07-01), Eggensperger et al.
Carlson et al: CA 62 11975h (1965).
Biryu Kov et al: CA 92 129819c (1980).
Toyobu Co Ltd: CA 98 127362y (1983).

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