 GOHSEFIMER Z
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This Range is a specially modified PVOH. The PVOH molecule contains a reactive acetacetyl group.
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Properties
| • |
Highly chemically reactive due to functional group |
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Forms tough, transparent membranes from water solution. |
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Adding specific waterproofing / cross-linking agents (such as glyoxal), followed by air drying and heat treatment, produces highly water- and hydrothermal-resistant films. |
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Excellent water-resistant adhesion |
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Forms all types of metallic ions and chelate. |
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Effective emulsifier or dispersant due to surface activity and protective colloid properties. In particular, it dramatically improves the water resistance of Polyvinyl Acetate emulsion. |
| • |
Excellent formaldehyde adsorbing properties. |
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| Product Grade |
Saponification Degree
(mol%) |
Viscositya)
(mPa•s) |
pHb) |
Volatile Matter
(%) |
Applications |
Z-100 |
98.5 ≤ |
4.5 ~ 6.0 |
3.5 ~ 5.0 |
7.0 or less |
Thermal recording paper |
| Z-200 |
99.0 ≤ |
11.5 ~ 14.0 |
3.5 ~ 5.0 |
5.0 or less |
Thermal recording paper |
| Z-210 |
95.0 ~ 97.0 |
11.5 ~ 15.0 |
4.0 ~ 5.0 |
5.0 or less |
Emulsifier for vinyl acetate |
| Z-320 |
92.0 ~ 94.0 |
19.0 ~ 24.0 |
3.5 ~ 5.0 |
5.0 or less |
Water based polymer-isocyanate adhesives |
| Z-220 |
90.5 ~ 92.5 |
11.5 ~ 15.0 |
4.0 ~ 5.0 |
5.0 or less |
Emulsifier for vinyl acetate emulsion |
|
| a) Viscosity of 4% aqueous solution at 20 degree C b) 4% aqueous solution |
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Applications of GOHSEFIMER Z
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Emulsifier |
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By using GOHSEFIMER Z as an emulsion protective colloid agent for vinyl acetate-based emulsion, a unique emulsion will be obtained. This will have a higher degree of water-resistant bond strength, unachievable with standard PVOH products. |
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Coating Agent |
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The demand for GOHSEFIMER Z is increasing for applications to coated and non-coated paper products requiring a higher degree of water resistance. As a coating agent for thermal printing paper and ink jet printing paper, GOHSEFIMER Z has been extremely popular. |
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Adhesive and Binder |
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GOHSEFIMER Z excels in adhesion to various materials with outstanding water resistance properties. We are currently expanding the scope of applications of GOHSEFIMER Z products. |
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| Group |
Typical Examples |
Compound |
Parts |
Pot Life |
| Amine compounds |
Ethylenediamine |
0.1 ~ 5phr |
2hrs. or shorter |
| Aldehyde compounds
Methylol compounds |
Glyoxal
Water-soluble melamine resin |
0.1 ~ 5phr
0.1 ~ 5phr |
2hrs. or longer
2hrs. or longer |
| Epoxy compounds
Isocyanate compounds |
Polyfunctional epoxy resin
− |
0.1 ~ 5phr
− |
24hrs. or longer
− |
| Multivalent metal salts
(Al, Ti, Zr, Mg, etc.) |
Al2(SO4)3 |
1 ~ 5phr |
24hrs. or longer |
|
 |
Sample |
Test no. |
1 |
2 |
3 |
4 |
5 |
6 |
| PVOH |
Z-200 (part)
NM-11 (part) |
100 |
100 |
100 |
100
|
100
|
100
|
Waterproofing agent |
Water-soluble melamine resin (part)
Glyoxal (part) |
|
5 |
5
|
|
5 |
5
|
Hydrothermal resistance |
Elution rate (%)
Degree of swelling (times) |
100
- |
17
11 |
8
3 |
100
- |
100
- |
100
- |
|
| (Test method)
Film formation: Thickness 40 mm, heat treatment at 100 degree C for 15 min. after 2 days of air-drying.
Hydrothermal resistance: Elution rate (%) after hot water soaking at 80 degree C for 1 hr. |
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 |
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Emulsion NO.
|
1 |
2 |
3 |
4 |
Polymerization Recipe |
Z-210(parts)
Z-220(parts)
N-300(parts)
GM-14(parts) |
4
−
−
− |
−
3
−
− |
−
−
5
− |
−
−
−
3 |
|
Vinyl acetate (parts)
Water (parts)
Polymerization initiator |
36
60
APS |
37
60
APS |
45
50
HPO/TA |
47
50
APS |
Properties |
Evaporation residue (%)
Viscosity(mPa•s,25 degree C)
pH
Apparent graft ratio (%)
Freeze-thaw stability
(number of cycles)
Water proof adhesion test |
40
15,600
4.3
76.1
5<
13hr |
40
27,300
4.2
76.1
5<
95hr |
50
13,000
4.5
−
0
× |
50
53,000
4.0
42.3
5<
× |
|
| NOTE |
1) |
APS: Ammonium peroxosulfate |
| |
2) |
Apparent graft ratio: An emulsion film was air-dried at 20 degree C, treated with acetone at 40 degree C for 8 hours and with hot water at 80 degree C for 8 hours, and the extraction-residue was calculated. |
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3) |
In the water proof adhesion test, an emulsion was applied to faces of birch specimens being glued at a coating weight of 100 g/m². The specimens were glued together and pressed for 24 hours at 200 gf/cm². After removal of the pressing force, the resultant sample was allowed to stand for 24 hours. This sample was used as a test piece. The test piece was immersed in boiling water and the time elapsed until the bonded faces came apart was measured. |
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Mixing ratio
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Emulsion properties
| Viscosity |
S.V.I |
Solids |
| ( Poise ) |
|
( % ) |
|
G.f
( % ) |
| Z-200: 4 parts |
Initiator (APS): 0.08 parts |
| VAC: 36 parts |
Buffer (NaOAc): 0.02 parts |
| Pure water: 60 parts |
|
|
|
73 |
| Z-100: 5 parts |
Initiator (APS): 0.08 parts |
| VAC: 45 parts |
Buffer (NaOAc): 0.02 parts |
| Pure water: 50 parts |
|
|
|
69 |
|
| Viscosity: |
Brook field viscometer, 10 rpm, 25 degree C |
| S.V.I: |
Obtained by log (viscosity at 2.5 rpm/viscosity at 20 rpm) ÷ 0.903 |
| Solids: |
Obtained by drying samples for 3 hrs. at 105 degree C |
| G.f (%): |
Grafting ratio
Obtained from residual rate.
After extracted Em film with warm Acetone followed by hot water.
cf) G.f of GM-14 use Em. (55% solids) is 40-50%. |
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Dissolution and Storage
| Dissolving GOHSEFIMER Z |
GOHSEFIMER is charged into room temperature water while stirring. The water is heated immediately with constant stirring, and kept at 90 to 95 degree C for 30 to 60 minutes.
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| Storing GOHSEFIMER Z |
The properties of a GOHSEFIMER Z aqueous solution may change (e.g. its viscosity may increase) if it is stored for long periods of time. Color changes or increased viscosity may also be induced by rust or metallic ions entering the solution.
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| • |
When mixing with defoaming agents, anticorrosives, antiseptics or other chemicals, follow the directions given for handling these chemicals.
|
| • |
Avoid storage in hot, humid areas as the product may incur blocking or its properties may change.
GOHSEFIMER Z will maintain its properties and stability if stored at moderate temperatures. |
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However, its functional group makes it highly chemically reactive, and introducing other chemicals into the product may result in its becoming insoluble or saponified. |
 |
Polymer |
COD (mg/l) |
BOD5 (mg/l) |
|
| GOHSEFIMER Z |
990 |
0.7 |
GOHSENOL |
600 ~ 1000 |
5 ~ 10 |
Corn Starch |
360 |
740 |
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| Measuring conditions: Sample concentrations mean pure material concentrations.
COD was measured by potassium permanganate method (JIS K 0102), and BOD5 means the BOD value of over 5 days.
Measurement: Registration No. of measurement certification enterprise, Osaka No. 10013, KK Osaka Environmental Technology Center. |
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Reactive PVOH
