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Two-component polyol/polyisocyanate composition especially useful as an abrasion-, heat-, and corrosion-resistant automotive undercoating. The polyol component comprises glycerol, a polypropylene oxide glycol, and a polypropylene oxide triol. The polyisocyanate component comprises MDI (diphenylmetha

Two-component polyol/polyisocyanate composition especially useful as an abrasion-, heat-, and corrosion-resistant automotive undercoating. The polyol component comprises glycerol, a polypropylene oxide glycol, and a polypropylene oxide triol. The polyisocyanate component comprises MDI (diphenylmethane-4,4′-diisocyanate), plus a poly(oxypropylene) glycol capped with MDI.

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The composition consisting essentially of two separate components, A and B; Component A consisting essentially of, in parts by weight, about 175 to 575 of polyether diol based on propylene oxide and containing only secondary hydroxyl groups, average molecular weight about 400 to 4,000; about 100 to

The composition consisting essentially of two separate components, A and B; Component A consisting essentially of, in parts by weight, about 175 to 575 of polyether diol based on propylene oxide and containing only secondary hydroxyl groups, average molecular weight about 400 to 4,000; about 100 to 450 of polyether triol based on propylene oxide and containing only secondary hydroxyl groups, average molecular weight about 500 to 3,000; glycerol about 8 to 15; polyurethane catalyst about 1 to 10; and Component B consisting essentially of about 300 to 400 parts by weight of a polyisocyanate material consisting essentially of about 45-50 weight % of diphenylmethane-4,4′-diisocyanate, and balance to make 100% of K－O(CH2CH[CH3]O)m－K where K is [Figure] and m is about 2-5.