Solvent based adhesive compositions

A solvent-based adhesive composition, comprising:

• (A) an isocyanate component comprising an isocyanate curing agent;
• and
• (B) a hydroxyl component comprising:
• a polyol blend comprising a polyester polyol and a polyether polyol;
• and
• a phosphate ester compound,
• wherein the polyester polyol accounts for from 30 to 65% by weight of the total weight of the hydroxyl component (B), and the polyether polyol accounts for from 5 to 35% by weight of the total weight of the hydroxyl component (B), wherein the phosphate ester compound has the structure (I):
• where R1 is any organic group, and wherein the phosphate ester compound accounts for from 0.5 to 25 percent by weight of the total weight of the hydroxyl component.

A method for preparing a solvent-based adhesive composition, the method comprising:

• providing an isocyanate component (A) comprising an isocyanate curing agent;
• providing a hydroxyl component (B) comprising a polyol blend, comprising a polyester polyol and a polyether polyol, and a phosphate ester compound;
• curing the hydroxyl component (B) with the isocyanate component (A) at a mix ratio ((A):(B), by weight) of from 100:8 to 100:15, thereby forming the solvent-based adhesive composition,
• wherein the polyester polyol accounts for from 30 to 65% by weight of the total weight of the hydroxyl component (B), and the polyether polyol accounts for from 5 to 35% by weight of the total weight of the hydroxyl component (B), wherein the phosphate ester compound has the structure (I):
• where R1 is any organic group, and wherein the phosphate ester compound accounts for from 0.5 to 25 percent by weight of the total weight of the hydroxyl component.