EO and PO Block Copolymers segmentation also distinguishes propylene‑oxide (PO) block copolymers, whose market dynamics are anchored in different application demands. In application terms, PO‑based elastomers lead the segment, supplying high‑temperature resistant rubber for automotive belts and industrial hoses; coatings represent a secondary tier, where PO’s hydrophobicity improves water‑resistance in exterior paints; adhesives capture a modest share, primarily in low‑temperature bonding where PO imparts flexibility; pharmaceutical carriers are limited but growing, exploiting PO’s degradability for controlled‑release systems; other uses include lubricants and polymer electrolytes. Regarding types, linear ABA triblocks are again prevalent, offering a balance of rigid PO end‑blocks and a compliant central block for elastomeric performance. Multiblock linear structures, comprising alternating PO and EO sequences, contribute to specialty coatings requiring tunable glass‑transition temperatures. Star‑shaped PO copolymers, though niche, provide high functionality for advanced surfactants. The relative weight of each type mirrors manufacturing complexity and end‑use value, collectively defining the PO share of the EO and PO Block Copolymers market.