28 Jan Poly(propylene glycol), α,ω-bis(cyclocarbonate)

PRODUCT OF THE MONTH | FEBRUARY 2026

Cyclocarbonate-terminated PPO macromonomer for NIPU materials

SPECIFIC POLYMERS offers a broad portfolio of polymers and building blocks functionalized with five-membered cyclic carbonate groups, designed to support advanced developments in Non-Isocyanate Polyurethane (NIPU) , also called Poly(hydroxyl)urethane (PHU) materials. Within this range, SP-1P-0-004 stands out as one of our best-selling and most widely used macromonomers, serving as a key building block for the development of PHU foams, adhesives, elastomers, and functional coatings. SP-1P-0-004 is a telechelic polypropylene oxide (PPO) macromonomer bearing two terminal cyclic carbonate groups. These functionalities readily react with diamines through a polyaddition mechanism, providing a well-established and sustainable route toward isocyanate-free polyurethane networks. Importantly, NIPU networks prepared from cyclocarbonate precursors such as SP-1P-0-004 can exhibit dynamic behavior, enabled by transcarbamoylation exchange reactions and reversible aminolysis of cyclic carbonates. These mechanisms open pathways toward reprocessable, repairable, and potentially self-healing polymer networks, addressing key challenges in sustainability and circular materials design.

SP-1P-0-004 is available in two PPO chain lengths, corresponding to average molecular weights of approximately 500 g·mol⁻¹ and 800 g·mol⁻¹, allowing fine tuning of network flexibility, crosslink density, and final material properties. Due to the strong and growing demand for this reference, SPECIFIC POLYMERS has significantly increased its production capacity, enabling the supply of larger batch sizes at more competitive pricing than in the past, while maintaining R&D-grade quality and full traceability. The product is now available in 25 g, 50 g, 100 g and 250 g batches. SP-1P-0-004 is a robust and versatile platform for researchers and industrial R&D teams exploring next-generation, isocyanate-free polyurethane materials, combining performance, sustainability, and emerging circularity concepts.