Hardener Additive

TPUA - ACFN (NON YELLOWISH)

DESCRIPITON

The almost colorless TPUA-ACFN (NON YELLOWISH) is designed as curing agent for adhesive based on hydroxyl polyurethane, natural and synthetic rubber; owing to TPUA-ACFN (NON YELLOWISH) features good photo-resistance, it is particularly suitable for light-color polyurethane adhesive system. Because the solvent is ethyl acetate, TPUA-ACFN (NON YELLOWISH) can be used in those countries where the use of methylene chloride is restricted.

 
TYPICAL PROPERTIES
Chemical composition ......................... Solution of approx .27 %
Polyisocyanate in 73% ethyl acetate
Intrinsic color ......................... almost colorless to light-color clear liquid
NCO content, %by weight ......................... 6.8±0.2
Solubility ......................... Soluble in various esters, ketones and aromatic solvents
Storage stability ......................... Reacts readily with moisture; for best performance it should be kept dry and stored at temperatures between(5oC~32oC)

 
PERFORMANCE
The Film of adhesive and coasting film mixed by TPUA-ACFN (NON YELLOWISH), is difficult to become yellow after exposure to UV light and heat. So TPUA-ACFN (NON YELLOWISH) 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 TPUA-ACFN (NON YELLOWISH), the ready-to-use double-component adhesive should be applied within a period (pot life) which is determined not only 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. TPUA-ACFN (NON YELLOWISH)
Choloroprene rubber
(Rubber content approx. 20%)		 ......................... 5-7 p.b.w. TPUA-ACFN (NON YELLOWISH)
Hydroxyl polyurethane
(Rubber content approx. 15%)		 ......................... 3-5 p.b.w. TPUA-ACFN (NON YELLOWISH)
PACKAGE
A. each 0.8kg in a standard aluminum bottle
B. each 20 bottles in a standard carton
C. each 180kg in an iron drum

Notice: These values are based on the test of our present laboratory test specimens.