Aqueous emulsion and adhesive using same
AssigneeKuraray Co., Ltd.
InventorsYoriko IMAOKA, Keisuke MORIKAWA, Tatsuya TANIDA
Life of this patent
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Abstract
An aqueous emulsion may include an ethylene-vinyl alcohol copolymer (A) as a dispersant and a polymer (B) which contains an ethylenically unsaturated monomer unit as a dispersoid, wherein the ethylene-vinyl alcohol copolymer (A) has an ethylene unit content of 1 mol % or more and less than 20 mol %; and a crystallinity in water at 30° C. (Cw (30° C.)) and a crystallinity in water at 70° C. (Cw (70° C.)) as determined by pulse NMR satisfying formula (I). Such aqueous emulsions can form fewer aggregates and exhibit excellent water-resistant adhesiveness and excellent film formability.
Claims14
An aqueous emulsion, comprising:
- an ethylene-vinyl alcohol copolymer (A) as a dispersant;
- and
- a polymer (B) comprising an ethylenically unsaturated monomer unit as a dispersoid,
- wherein the ethylene-vinyl alcohol copolymer (A) has an ethylene unit content in a range of from 1 to less than 20 mol %, and
- wherein the ethylene-vinyl alcohol copolymer (A) has a crystallinity in water at 30° C. (Cw (30° C.)) and a crystallinity in water at 70° C. (Cw (70° C.)) as determined by pulse NMR satisfying formula (I).
- 4
- ≤
- 1
-
- 0
-
- 0
- -
- C
-
- w
-
- (
- 30
-
- °C
- )
- 1
-
- 0
-
- 0
- ×
- [
- C
-
- w
-
- (
- 30
-
- °C
- )
- -
- Cw
-
- (
- 70
-
- °C
- )
- ]
- ≤
- 22.
- (
- I
- )
Dependencies are inferred from the claim text.