Aqueous Solution Characteristics

Due to its molecular structure, Nichigo G-Polymer™ has excellent low foaming characteristics in aqueous solutions.
Aqueous solutions with excellent workability can be achieved without adding antifoaming agent.

Right: Nichigo G-Polymer™ (fully saponified)
Left: PVOH (fully saponified)

[Test method]
Add a 1% aqueous solution (200 mL) into a 1L graduated cylinder, blow in 300 cc/min of air through a sparger, and observe the height of the foam over time.

Aqueous solutions of Nichigo G-Polymer™ demonstrate excellent viscosity stability when stored at low temperatures.
By controlling crystallinity, the viscosity of the aqueous solution can also be controlled.





Nichigo G-Polymer™: fully saponified

10% aqueous solution stored at 5°C, viscosity measurement: Brookfield viscometer, 10 rpm

Nichigo G-Polymer™ aqueous solution exhibits resistance to the occurrence of flow abnormalities even under high shear conditions.
Therefore, application to high-speed coating and other purposes is expected.



Partially saponified PVOH, degree of saponification: 88 mol%

[Measurement]
Capillary rheometer, 7.5% aqueous solution

Nichigo G-Polymer™ is stable and resists changes in viscosity even in highly concentrated alkaline aqueous solutions.



[Test method]
Mix 12% resin aqueous solution and 20% NaOH aqueous solution 1:1.
Observe the solution state after leaving at 23°C for 3 days.

Dissolution state when dissolving each resin in 10% NaOH aqueous solution

[Conditions]
Polymer concentration: 6%
Dissolution condition : 90°C, 1 hr
Storage temperature : 40°C

Viscosity was measured at different pHs when stored at 5°C and at 23°C.
Fully saponified PVOH stored at 5°C formed a gel in one day. In contrast, the viscosity of Nichigo G-Polymer™ remained stable regardless of pH.

Viscosity stability of aqueous solutions over time

[Test method]
Measured the viscosity of a 7% aqueous solution at a pH adjusted to 3.0 with 10% acetic acid aqueous solution and to 8.0 and 13.0 with 10% NaOH aqueous solution, after storage at 5°C and 25°C for one month

Nichigo G-Polymer™ also dissolves in aqueous solutions containing a large amount of lower alcohol.

Nichigo G-Polymer™ aqueous solution demonstrates high surface tension compared to PVOH.

Surface tensions of Nichigo G-Polymer™ AZF8035Q