Reactive alkyl phenolic resin
1. Introduction:
Reactive alkyl phenolic resin has extremely good compatibility with chloroprene rubber adhesive, capable to greatly improve its adhesive characteristics, further heighten its weathering resistance, oil resistance, chemical resistance, and especially in the initial period of bonding, it can extend the keeping time of initial viscosity, highten the stability, heat resistance and cohesiveness.
2. Main properties and indexes:
Appearance |
Pale yellow to light brown lumpish solid |
Softening point ( R&B, °C) |
90-110 |
Absolute molecular weight |
1700-2100 |
GPC molecular weight |
0.2× 10 4 -0.9 × 10 4 |
Dispersity |
2.61 |
Reactivity with magnesia |
6.6% |
3. Characteristics:
A. heighten initial viscosity B. improve heating stability C. heighten cohesiveness of chloroprene rubber adhesive D. good compatibility with chloroprene rubber E. extend keeping time of initial viscosity F. good reactivity with magnesia
4. Typical formula (resin pre-reaction solution)
Part 1 |
Weight ratio |
Part 2 |
Weight ratio |
Part 3 |
Weight ratio |
Chloroprene rubber AV |
170 |
Ethyl acetate |
60 |
Alkyl phenolic resin |
44 |
SK-120 |
40 |
Butanone |
40 |
Magnesia |
4.4 |
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120# Solvent oil |
60 |
Toluene |
60 |
Preparing method:
Firstly uniformly mix the material of Part 1, then dissolve them in Part 2. Keep stiring Part 3 in the container for 6 hours, and then add them into the mixture of Part 1 and Part 2. Keep stiring 5 hours.
5. Adhesive characteristics :
Demixing resistance: good (place the adhesive in a sealed container at 20°C for one month, and observe the demixing conditions)
Holding of initial viscosity: good. Viscosity: after 5 hours (good); after 24 hours (good)
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