TECHNICAL DATA SHEET
SHOWA DENKO K.K.
FUNCTIONAL POLYMERS DIV.
ISESAKI PLANT TECHNOLOGY DEPT.
Eco-friendly phenolic resin for adhesives
SHONOL® ADM-8000 Series
Shonol® ADM-8000 series is novolac type alkyl-phenolic resin.
Shonol®
ADM-8000 series shows excellent tack and heat resistance when they are used as a
tackfier of chloroprene rubber adhesives. Generally, tack and heat resistance are
incompatible, but they became compatible by utilizing chloroprene rubber’s
crosslinking mechanism. Since the formation mechanism of expressing strength
differs from the one of normal resol type resins, chelation process by MgO is not
required.
Furthermore, the chloroprene rubber adhesives made from Shonol®
ADM-8000 series can show non formaldehyde emission. You also be able to achieve
cost-cutting because you are not required to add a formalin catcher agent.
[Features]
1. High performance in the cross-linking reactions with rubber.
2. Non formaldehyde emission
3. Chelation process free.
4. Compatible with tack and heat resistance.
[Resins characteristic (tentative)]
ADM-8000
ADM-8200
Principal
components
Alkylphenolic resins
(Novolac type)
Alkylphenolic resins
(Novolac type)
Appearances
Light yellow white solid
Dun solid
Softening Point
105±10
140±10
1. Adhesive formulation example
Basic adhesive formulation is shown as following.
Since the less amount of MgO you add, the better strength the adhesives show, less than
(about 2% is suitable) 10% is recommended.
Item
Load (weight)
CR rubbers
100.0
Phenolic type resin
50.0
BHT
2.0
MgO
2.0
ZnO
5.0
Methyl ethyl ketone
150.0
Ethyl acetate
150.0
Cyclohexane
150.0
Total
609.0
Strength of adhesive bonding
<Conditions>
Substrate; canvas/canvas, canvas / aluminum
Coating; 1st and 2nd time 300g/m2-> RT 1-hour dry
->the 3rd time 300g/m2-> RT 20-min. dry
-> Stuck by pressure immediately.
* In use of metal -> 1 time applications -> RT 20 min. dry
->Stuck by pressure immediately
<Measurement conditions>
 180°peel strength : crosshead speed 200 mm/min.
 Dry strengths: At 25℃ after curing seven-day at RT.
 Strength in high temperature:
Cured seven-day at RT then measure in atmosphere at 80℃ after heating 20 min at 80℃.
 thermal aging
Cured seven-day at RT then heat at 80℃-96 hrs.
After cooling to 25℃. Measure at 25C
2. Amount of ZnO Addition, and Intensity
The relation between the amount of ZnO addition and adhesion intensity is shown below.
<Mixture>
 Rubber: Shoprene® WHV
 Phenolic resin: Shonol® ADM-8000
 Formulation is as same as the example of previous page except for the amount of ZnO.
* The appropriate amount of ZnO is 5 parts / chloroprene rubbers 100 parts
3. Amount of MgO addition and intensity
The relation between the amount of MgO addition and adhesion intensity is shown below.
<Mixture>
 Rubber: Shoprene® WHV
 Phenolic resin: Shonol® ADM-8000
 Formulation is as same as the previous page except for the amount of MgO.
* The appropriate amount of Mgo is 2 parts / chloroprene rubbers 100 parts.
4. Features of grades
Shonol® ADM-8000
1. Extremely long tack
2. Combined with WHV Rubber, tack and heat resistance is compatible.
Shonol® ADM-8200
1. Excellent thermal aging resistance
2. Good tack
3. Combined with AF Rubber, heat-resistant dramatically improves.
5. Tack time
<Conditions>
 Formulation: Same as before. With AC rubbers
 Film thickness: 250μm / glass plates
 Method: By touching
<Tack time>
Resins
Tack time
References
ADM-8000
Over 72 hrs.
ADM-8200
30-35 hrs.
CKM-904
30-35 hrs.
Long tack grade
CKM-1636
80-90 min
MgO chelation
※ Shonol® ADM-8000 series shows great performance in tack and heat resistance.
6. Emission of formaldehyde
Measuring-method : Same formulation as before. With WHV rubbers
Measurement: Based on JIS A-1901-2003 (Chamber process).
<Results>
Resin
Formaldehyde emissions rate
(μg/m2・hrs)
Grade
ADM-8000
Not detected
F☆☆☆☆
ADM-8200
Not detected
F☆☆☆☆
CKM-1636*
90
F☆☆
* Chelation by MgO
※Shonol® ADM-8000 series can achieve F☆☆☆☆ rate of formaldehyde emissions.
7. Strength of adhesive bonding
The bonding strength for various rubber is shown below.
Formulation is as same as No. 2.
With WHV rubbers
(Unit : N/25mm)
Canvas/aluminum
Canvas/canvas
Ordinary
Heat proof
state
Ordinary
state
Heat proof
Thermal
aging
ADM-8200
86
101
82
175
108
ADM-8000
23
34
10
177
85
CKM-1636*
79
20
62
183
29
* Chelation by MgO.
With AC rubbers
(Unit : N/25mm)
Canvas/aluminum
Canvas/canvas
ADM-8200
Ordinary
state
172
62
Thermal
aging
61
Ordinary
state
203
ADM-8000
80
10
25
208
13
CKM-1636*
148
39
84
196
28
Heat proof
Heat proof
35
* Chelation by MgO.
With AF rubbers
(Unit : N/25mm)
Canvas/canvas
Canvas/aluminum
ADM-8200
Ordinary
state
120
111
Thermal
aging
92
Ordinary
state
176
ADM-8000
35
49
24
177
85
CKM-1636*
78
39
69
183
29
Heat proof
Heat proof
106
* Chelation by MgO.
* Heat-resistant dramatically improves by using ADM-8000 series.
This is ADM-8000 series’ great features.
Note: All data presented above are the results of our internal experiments. Thus, those values
described above are representative figures and no guaranteed values. Before use, please ensure
in advance that the right application conditions and methods are met. Please be reminded that the
above mentioned values may be subject to changes in the future.
As of April 2014

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