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US 4,051,161 AGranted
Ultraviolet screening agents and coating materials containing organosilane ester groups
AssigneeE. I. Du Pont de Nemours and Company
InventorStephen Proskow
Life of this patent
Estimating the term…
Abstract
Monomers of the formulas R.sup.2 (O-CH.sub.2 CH(OH)(R).sub.a Si(OR.sup.1).sub.3).sub.b and ##STR1## WHEREIN R and R.sup.1 are generally lower hydrocarbyl groups, R.sup.2 is an aromatic ultraviolet light-absorbing moiety bonded by aromatic carbon, a is 0 or 1 and b is 1 or 2 are useful in the formulation of light- and abrasion-resistant coatings for polymers.
Claims11
A compound of one of the formulas ##STR9## wherein R is a divalent hydrocarbon or hydrocarbon ether radial of up to 10 carbons;
- R.sup.1 is an aliphatic hydrocarbon radical of less than 5 carbon atoms, an acyl radical of less than 5 carbon atoms, or a radical of the formula (CH.sub.2 CH.sub.2 O).sub.n Z in which n is an integer of 1 to 8 and Z is an aliphatic hydrocarbon radical of less than 5 carbon atoms;
- R.sup.2 is a stable, monovalent or divalent carbocyclic hydroxy-aromatic radical, containing up to 4 aromatic rings joined to oxygen through an aromatic carbon, of the type which absorbs light in the region of 2500-4000 A in an amount effective for stabilizing polymers against ultraviolet light;
- a is 0 or 1;
- and
- b is 1 or 2.
2 more elements
A compound of the formula ##STR11## wherein R is a divalent hydrocarbon or hydrocarbon ether radical of up to 10 carbons;
- R.sup.1 is an aliphatic hydrocarbon radical of less than 5 carbon atoms, an acyl radical of less than 5 carbon atoms, or a radical of the formula (CH.sub.2 CH.sub.2 O).sub.n Z in which n is an integer of 1 to 8 and Z is an aliphatic hydrocarbon radical of less than 5 carbon atoms;
- R.sup.2 is a stable, monovalent, carbocylic hydroxyaromatic radical, containing up to 4 aromatic rings joined to oxygen through an aromatic carbon, of the type which absorbs light in the region of 2500-4000 A in an amount effective for stabilizing polymers against ultraviolet light;
- and
- a is 0 or 1.
1 more element
Dependencies are inferred from the claim text.