Drop for drop, there's extra dependability in DABCO -33LV urethane foam catalyst Stability
Toxicity
Low-cost convenience $2.15 per lb.*
One-shot rigids
For more information on DABCO-33LV and the com plete DABCO story, please write to us.
DABCO-33LV low viscosity catalyst retains 1 0 0 % activity d u r i n g extended storage. Such stability is extremely i m p o r t a n t in two-component prepolymer and one-shot premix rigid systems. Reaction rates can t h e n be r e p r o d u c e d , with controlled gela tion t i m e p e r m i t t i n g good flowability and fast cures for o p t i m u m physical proper ties. System m a n u f a c t u r e r s have rec ognized t h a t DABCO sets the standard for urethane catalyst performance. DABCO, in its five years of world-wide use, has never been associated with a toxicity p r o b l e m . According to t h e re ported literature certain volatile tertiary amine catalysts, particularly f r o m a m o n g t h e N-methylated alkylene diamines, produce toxic vapors t h a t cause t h e hazardous 'blue haze' effect on eyes . . . a very i m p o r t a n t reason to choose DABCO and DABC0-33LV. DABCO-33LV offers the convenience of a liquid catalyst plus all the advantages of DABCO. In flexible slab formulations, DABCO is used at concentrations of .08 to .15 parts per 100 parts polyol. DABCO33LV contains y 3 by weight DABCO in a solution of dipropylene glycol and is used proportionately. It is lower in cost t h a n combinations of less active, vapor-form ing amines. To produce a flexible f o a m with a density of 1.5 lbs/ft 3 , the cost for DABCO-33LV is less than 5 / 1 0 0 of a cent per board foot of f o a m . Only t h e water in your formulation costs less. For one-shot rigid systems using PAPIf or crude grades of isocyanates, DABCO33LV is recommended in conjunction with a strong basic amine co-catalyst. Dimethylaminoethanol is an economical, strongly basic amine which is miscible with DABCO-33LV. It buffers the acidity of the isocyanates, permitting DABCO33LV to do its job of catalyzing the system. Gelation rates are controllable, permitting better flowability and less shear. Foams have higher compression strengths and lower equilibrium Κ factors.
*3 or more drums, U.S.A. and Canada
tRegistered trade-mark of the Corwin Company.
HOUDRY Patent Reference:-the_u§e of Triethylenediamine as catalyst in pro
PROCESS A N D CHEMICAL COMPANY
duction of polyurethanes is covered by our U.S. Patent No. 2,939,851
1339 Chestnut Street, Philadelphia, Pa. 19107
Corresponding patents have been issued in a number of foreign countries. Other
20
U.S. and foreign patent applications pending.
C&ΕΝ
Division of AIR PRODUCTS AND CHEMICALS, INC. *Houdry means Progress . . . through Catalysis
