Polymer compositions comprising alkyl silicone and articles formed from same
AssigneeCorning Incorporated
InventorsMadeline Stavriana Cannon, Amy Claire Kauffman, Laura Bridget Kender, Gregory Roger Martin
Life of this patent
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Abstract
Disclosed herein are polymer compositions including, based on the total weight of the polymer composition, greater than or equal to 0.5 wt. % and less than or equal to 20 wt. % alkyl silicone and a thermoplastic polymer. The alkyl silicone has a molecular weight greater than or equal to 1,000 g/mol and less than or equal to 10,000 g/mol. The alkyl silicone has a dimethyl silicone content greater than or equal to 40 wt. % and less than or equal to 70 wt. %, based on a total weight of the alkyl silicone.
Claims29
A pipette tip, comprising:
- a polymer composition, the polymer composition comprising, based on a total weight of the polymer composition:
- greater than or equal to 0.5 wt. % and less than or equal to 20 wt. % alkyl silicone, the alkyl silicone comprising:
- a molecular weight greater than or equal to 1,000 g/mol and less than or equal to 10,000 g/mol;
- and
- a dimethyl silicone content greater than or equal 40 wt. % and less than or equal to 70 wt. %, based on a total weight of the alkyl silicone;
- and
- a thermoplastic polymer;
- wherein the pipette tip comprises a fluid retention less than or equal to 11%, as measured by fluorescence after a single aspirate/dispense cycle, using a fluorescein sodium salt at a concentration of 1 μg/mL.
A pipette tip, comprising:
- a polymer composition, the polymer composition comprising, based on a total weight of the polymer composition:
- greater than or equal to 0.5 wt. % and less than or equal to 20 wt. % alkyl silicone, the alkyl silicone comprising:
- a molecular weight greater than or equal to 1,000 g/mol and less than or equal to 10,000 g/mol;
- and
- a dimethyl silicone content greater than or equal 40 wt. % and less than or equal to 70 wt. %, based on a total weight of the alkyl silicone;
- and
- a thermoplastic polymer;
- wherein the pipette tip is solvent resistant such that, a fluid retention of the pipette tip is less than or equal to 11%, as measured by fluorescence after three aspirate/dispense cycles with a polar solvent, with a five second hold time before each dispense, using a fluorescein sodium salt at a concentration of 1 μg/mL.
A pipette tip, comprising:
- a polymer composition, the polymer composition comprising, based on a total weight of the polymer composition:
- greater than or equal to 0.5 wt. % and less than or equal to 20 wt. % alkyl silicone, the alkyl silicone comprising:
- a molecular weight greater than or equal to 1,000 g/mol and less than or equal to 10,000 g/mol;
- and
- a dimethyl silicone content greater than or equal 40 wt. % and less than or equal to 70 wt. %, based on a total weight of the alkyl silicone;
- and
- a thermoplastic polymer;
- wherein the pipette tip comprises a haze less than or equal to 50%, as measured by ASTM D1003-21 with a spectrophotometer and a 1 mm thick sample.
A pipette tip, comprising:
- a polymer composition, the polymer composition comprising, based on a total weight of the polymer composition:
- greater than or equal to 0.5 wt. % and less than or equal to 20 wt. % alkyl silicone, the alkyl silicone comprising:
- a molecular weight greater than or equal to 1,000 g/mol and less than or equal to 10,000 g/mol;
- and
- a dimethyl silicone content greater than or equal 40 wt. % and less than or equal to 70 wt. %, based on a total weight of the alkyl silicone;
- and
- a thermoplastic polymer;
- wherein the pipette tip is a 200 μL pipette tip and comprises an amount of fluid retention less than or equal to 4 mg after a single aspirate/dispense cycle with 200 μL of fluid, as measured by gravimetric testing.
Dependencies are inferred from the claim text.