Method for preparing pressure-sensitive adhesive composition, method for producing protective sheet and method for producing glass unit
AssigneeNitto Denko Corporation
InventorsKosuke Yonezaki, Hakaru Horiguchi, Yuta Shimazaki
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Abstract
Provided is a method for preparing a PSA composition for protecting Low-E glass plates from degradation and corrosion. A PSA composition preparation method is provided for Low-E glass plate protection. The method comprises a step of obtaining an aqueous liquid, and a step of obtaining a polymer containing liquid comprising the aqueous liquid and a polymer. Here, the aqueous liquid satisfies at least (a) having an electrical conductivity below 300 μS/cm or (b) having a chloride ion concentration below 35 μg/mL.
Claims18
A method for producing a protective sheet applied to a surface of a Low-E layer on a glass plate, the method comprising:
- a step of obtaining a pressure-sensitive adhesive composition comprising:
- a step of obtaining an aqueous liquid, wherein the aqueous liquid has a chloride ion concentration of 0.6 μg/mL or higher and below 35 μg/mL, and
- a step of obtaining a polymer-containing liquid comprising the aqueous liquid and a base polymer;
- and
- a step of forming a pressure-sensitive adhesive layer from the pressure-sensitive adhesive composition,
- wherein the pressure-sensitive adhesive composition is an acrylic pressure-sensitive adhesive composition comprising an acrylic polymer, as the base polymer, or a rubber-based pressure-sensitive adhesive composition comprising a rubber-based polymer as the base polymer, and
- a glass transition temperature of a polymer contained in the pressure-sensitive adhesive composition is in a range of higher than −40° C. and 0° C. or lower.
Dependencies are inferred from the claim text.