Back to results
US 6,252,032 B1Granted
UV absorbing polymer
AssigneeMiniMed Inc.
InventorsWilliam P. Van Antwerp, Li Yao
Life of this patent
Estimating the term…
Abstract
An ultraviolet-absorbing polymer is formed from a reaction mixture including a diisocyanate, at least one selected from the group consisting of a diol, a diamine and mixtures thereof, and a polyfunctional UV-absorbing monomer.
Claims26
A UV-absorbing polymer formed from a reaction mixture comprising:
- a) a diisocyanate,
- b) at least one selected from the group consisting of a diol, a diamine and mixtures thereof, and
- c) a polyfunctional UV-absorbing monomer selected from the group consisting of vitamin B2 and vitamin B6.
A method of producing a UV-absorptive polymer that comprises the steps of
- (a) reacting a diisocyanate with a polyfunctional UV-absorbing monomer selected from the group consisting of vitamin B2 and vitamin B6 to form an oligomer, and
- (b) reacting said oligomer with at least one selected from the group consisting of a diol, a diamine and mixtures thereof.
A method of producing a UV-absorptive polymer that comprises the steps of
- (a) reacting a diisocyanate with a polyfunctional UV-absorbing monomer selected from the group consisting of vitamin B2 and vitamin B6 to form a first oligomer,
- (b) reacting said first oligomer with at least one polyol to form a second oligomer, and
- (c) reacting said second oligomer with at least one chain extender selected from the group consisting of a diol, a diamine and mixtures thereof.
A method of producing a UV-absorptive polymer that comprises the steps of
- (a) reacting a diisocyanate with at least one polyol to form a first oligomer,
- (b) reacting said first oligomer with a polyfunctional UV-absorbing monomer selected from the group consisting of vitamin B2 and vitamin B6 to form a second oligomer, and
- (c) reacting said second oligomer with at least one chain extender selected from the group consisting of a diol, a diamine and mixtures thereof.
A method of producing a UV-absorptive polymer that comprises the steps of:
- (a) combining a diisocyanate with a polyfunctional UV-absorbing monomer selected from the group consisting of vitamin B2 and vitamin B6 and at least one polyol to form a reaction mixture, and
- (b) curing said reaction mixture.
Dependencies are inferred from the claim text.