Use of borate-polyol complexes in ophthalmic compositions
First Claim
1. A method of preparing an aqueous ophthalmic composition, comprising the steps of preparing a water-soluble borate-polyol complex by mixing borate and a polyol together in a aqueous solvent and adding polyvinyl alcohol thereto, wherein the water-soluble borate-polyol complex is present at a concentration between about 0.5 to about 6.0 wt %.
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Accused Products
Abstract
Aqueous ophthalmic compositions containing water-soluble borate-polyol complexes are useful in aqueous ophthalmic compositions containing polyvinyl alcohol. These compositions provide the benefits of a borate buffering system, such as enhanced antimicrobial activity, without the problems associated with the use of borate and pol, such as formation of borate-polyvinyl alcohol complexes which are water-insoluble.
65 Citations
15 Claims
- 1. A method of preparing an aqueous ophthalmic composition, comprising the steps of preparing a water-soluble borate-polyol complex by mixing borate and a polyol together in a aqueous solvent and adding polyvinyl alcohol thereto, wherein the water-soluble borate-polyol complex is present at a concentration between about 0.5 to about 6.0 wt %.
Specification