Composition for protecting light sensitive materials
A composition to protect light-sensitive therapeutics includes a combination of two different anthraquinone dyes and titanium dioxide to protect the light-sensitive therapeutics from UV-Vis light in the range of 190 to 750 mm.
1. A thermoplastic composition consisting of:
(a) about 98.94% to about 99.61%, by weight of the thermoplastic composition, of a polyester,
(b) about 0.14% to about 0.30%, by weight of the thermoplastic composition, of a first anthraquinone dye comprising a combination of Disperse Violet 31 and Disperse Violet 26,
(c) about 0.05% to about 0.08%, by weight of the thermoplastic composition, of a second anthraquinone dye comprising Solvent Violet 13,
(d) about 0.20% to about 0.48%, by weight of the thermoplastic composition, of titanium dioxide, and
(e) 0 to about 0.20%, by weight of the thermoplastic composition, of at least one additive selected from antioxidant, plasticizer, and dispersant, wherein the antioxidant is selected from phenolic antioxidant.
2. The thermoplastic composition of claim 1 , wherein a plaque molded from the thermoplastic composition blocks UV-Vis light in the range of 190 nm to 750 nm with 1% or less UV-Vis light transmission at a plaque thickness of 0.5 mm.
3. The thermoplastic composition of claim 1 , wherein the polyester is selected from the group consisting of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polylactic acid (PLA), polyhydroxybutyrate (PHB), polyhydroxybutyrate-co-valerate (PHBV), and combinations thereof.
4. A thermoplastic composition consisting of:
(a) about 99.21% to about 99.35%, by weight of the thermoplastic composition, of a polyester,
(b) about 0.19% to about 0.20%, by weight of the thermoplastic composition, of a first anthraquinone dye comprising a combination of Disperse Violet 31 and Disperse Violet 26,
(c) about 0.064% to about 0.070%, by weight of the thermoplastic composition, of a second anthraquinone dye comprising Solvent Violet 13,
(d) about 0.36% to about 0.40%, by weight of the thermoplastic composition, of titanium dioxide, and
(e) about 0.04% to about 0.20%, by weight of the thermoplastic composition, of at least one additive selected from antioxidant, plasticizer, and dispersant, wherein the antioxidant is selected from phenolic antioxidant.
5. The thermoplastic composition of claim 4 , wherein a plaque molded from the thermoplastic composition blocks UV-Vis light in the range of 190 nm to 750 nm with 1% or less UV-Vis light transmission at a plaque thickness of 0.5 mm.
6. The thermoplastic composition of claim 4 , wherein the polyester is selected from the group consisting of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polylactic acid (PLA), polyhydroxybutyrate (PHB), polyhydroxybutyrate-co-valerate (PHBV), and combinations thereof.
7. A thermoplastic composition consisting of:
(a) 98.94% to 99.61%, by weight of the thermoplastic composition, of a polyester,
(b) 0.14% to 0.30%, by weight of the thermoplastic composition, of a first anthraquinone dye comprising a combination of Disperse Violet 31 and Disperse Violet 26,
(c) 0.05% to 0.08%, by weight of the thermoplastic composition, of a second anthraquinone dye comprising Solvent Violet 13,
(d) 0.20% to 0.48%, by weight of the thermoplastic composition, of titanium dioxide, and
(e) 0 to 0.20%, by weight of the thermoplastic composition, of at least one additive selected from antioxidant, plasticizer, and dispersant, wherein the antioxidant is selected from phenolic antioxidant;
wherein the polyester is selected from the group consisting of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polylactic acid (PLA), polyhydroxybutyrate (PHB), polyhydroxybutyrate-co-valerate (PHBV), and combinations thereof; and
wherein a plaque molded from the thermoplastic composition blocks UV-Vis light in the range of 190 nm to 750 nm with 1% or less UV-Vis light transmission at a plaque thickness of 0.5 mm.