The almost colorless HARTDUR CFN is designed as curing agent for adhesive based on hydroxyl polyurethane, natural and synthetic rubber; owing to HARTDUR CFN features good photo-resistance, it is particularly suitable for light-color polyurethane adhesive system. Because the solvent is ethyl acetate, HARTDUR CFN can be used in those countries where the use of methylene chloride is restricted.
Typical Properties:
| Chemical composition |
Solutionofapprox.27%polyisocyanate in 73% ethyl acetate |
| Intrinsic color |
almost colorless to light-color clear liquid |
| NCO% |
4.8 ± 0.2 |
| Solubility |
Soluble in various esters, ketones and aromatic solvents |
| Storage stability |
Reacts readily with moisture; for dry and stored at temperatures between (5℃~32℃) |
Performance: The film of adhesive and coasting film mixed by HARTDUR CFN is difficult to
become yellow after exposure to UV light and heat. So HARTDUR CFN shows
good bonding strength in PVC with much plasticizer, SBR with plenty of oil,
coasting leather, silk and so on.
Application:After the addition of HARTDUR CFN, the ready-to-use double-component
adhesive should be applied within a period (pot life) which is determined not only
by its content of rubber, but also by the other ingredients of the formulation (e.g.resins, antioxidants, solvents, etc.). If the adhesive is not used within this period, it may become increasingly difficult to apply and its viscosity increases rapidly until irreversible gelling ultimately occurs.
Suggested Additions:For curing adhesive of 100 parts by weight (p.b.w.) based on:
Graft-Choloroprene rubber (rubber content approx. 16%): 3-5% p.b.w. HARTDUR CFN
Choloroprene rubber (rubber content approx. 20%): 5-7% p.b.w. HARTDUR CFN
Hydroxyl polyurethane(rubber content approx. 15%): 3—5 p.b.w. HARTDUR CFN
Package:
A:each 0.8 kg in a standard aluminum bottle.
B:each 20 bottles in a standard carton.
C:each 180 kg in an iron drum.
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