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.
Claims20
1-42. (canceled)
A method for producing a glass unit, the method comprising:
- a step (A) of obtaining a Low-E glass plate that comprises a glass substrate and a Low-E layer placed on the glass substrate;
- a step (B) of applying a protective sheet to a surface of the Low-E layer of the Low-E glass plate;
- an optional step (C) of subjecting the Low-E glass plate with the protective sheet applied thereon to at least one process selected from the group consisting of transportation, storage, processing, washing and handling;
- a step (D) of removing the protective sheet from the Low-E glass plate;
- and
- a step (E) of assembling a glass unit using the Low-E glass plate;
- wherein, the protective sheet comprises a pressure-sensitive adhesive layer,
- the pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition, and
- the pressure-sensitive adhesive composition is prepared by a method comprising:
- a step of obtaining an aqueous liquid, and
- a step of obtaining a polymer-containing liquid comprising the aqueous liquid and a polymer;
- wherein the aqueous liquid satisfies at least one of the following:
- (a) having an electrical conductivity below 300 μS/cm, and
- (b) having a chloride ion concentration below 35 μg/mL.
A method for preparing a pressure-sensitive adhesive composition for Low-E glass plate protection, the method comprising:
- a step of obtaining an aqueous liquid, and
- a step of obtaining a polymer-containing liquid comprising the aqueous liquid and a polymer;
- wherein the aqueous liquid satisfies at least one of the following:
- (a) having an electrical conductivity below 300 μS/cm, and
- (b) having a chloride ion concentration below 35 μg/mL.
Dependencies are inferred from the claim text.