Trimethylolpropane → Dimethylolpropionic acid

Participants

Reaction Steps

Examples of polyester polyols selected for the ACBC layer, and, in embodiments, for reaction with the polyisocyanate are known, and can be obtained from Perstorp Specialty Chemicals (Perstorp, Sweden) as BOLTORN® P500 (OH value of 560 to 630 milligram KOH/gram, Mw (GPC)=1,800), P1000 (OH value of 430 to 490 mg KOH/grams, Mw (GPC)=1,500), H20 (OH value of 490 to 520 mg KOH/grams, Mw (GPC)=2,100, Tg=25° C.), H2003 (OH value of 280 to 310 mg KOH/grams, Mw (GPC)=2,500, Tg=−5° C.), H2004 (OH value of 110 to 130 mg KOH/grams, Mw (GPC)=3,200, Tg=−35° C.), H30 (OH value of 490 to 510 mg KOH/grams, Mw (GPC)=3,500, Tg=35° C.), H40 (OH value of 470 to 500 mg KOH/grams, Mw (GPC)=5,100, Tg=40° C.), U3000 (OH value of 77 mg KOH/grams, Mw (GPC)=6,500), and W3000 (OH value of 45 mg KOH/grams, Mw (GPC)=10,000). In embodiments, a dendritic polyester polyol selected for the ACBC layer formation can be formed by, for example, the polymerization of a core such as trimethylolpropane and branches extending therefrom of 2,2-dimethylol propionic acid (Bis-MPA), and which resulting products can be referred to as hydroxyl-functional dendritic polyesters.

Provenance & Evidence