Propylene glycol methyl ether acetate → HCID 24755566, compound

Participants

Reaction Steps

In a glass jar 8.48 grams of 3,3,6,6,8a-pentamethyl-tetrahydro-1,8-dioxa-4a-aza-napthalenes (as prepared in Example 1) was combined with 2.84 grams of propylene glycol monomethylether acetate, 0.92 grams of a 2% dibutyl tin dilaurate solution in ethyl acetate, and 0.11 grams of a BYK 306 and 0.04 grams of Byk 361. To this was added 68.66 grams of a solution of 32.93 grams of Desmodur® XP 2410 (hexamethylene diisocyaante trimer available from Bayer), 31.38 grams of Desmodur® Z4470BA (isophorone diisocyanate trimer available from Bayer) and 4.35 grams n-butyl acetate. This mixture was stirred and then 0.36 grams of acetic acid was added and the mixture and stirred. The mixture was drawndown to give coatings of ˜4 mils in thickness. The coating was baked at 140° F. for 30 minutes. At one day the coating had a Fischercope hardness of 90 N/mm2 and a swell ratio of 1.70. At 30 days the coating had a Fischercope hardness of 158 N/mm2, a Tg (at the midpoint) of 59° C. and a gel fraction of 96%.

Provenance & Evidence