RPU - TECHNOLOGY

Key features of RPU technology

Feasible to get GRS certificate

95% Purity

95% Recovery rate

1/15 CAPEX

ALL Feedstock flexibility

-50% GHGs Reduction

Our technology vs. traditional recycling approaches

Depolymerization Material Separation Patents & Certifications

RPU Depolymerization
Technology

We specialize in polyurethane depolymerization using a low-temperature catalytic process (glycolysis).
This technology allows for the efficient production of high-purity monomers and building blocks with low-cost catalysts,
all within a short reaction time of 1 to 3 hours, ensuring both cost-effectiveness and sustainability.

Catalytic depolymerization of separated polymer (PU) at a low-T (150°C)

Low-cost catalysts

High purity monomer and building blocks products

Short reaction time (1~3 h)

Depolymerization of Flexible Polyurethane

Flexible PU MAT

Crushing

Depolymerization

Purification

REPU-POL F3

Characterization of
REPUPOL R3

Recovery rate (%) 94.8

Specific density 1.074

Viscosity at 25°C 6,215

OH number (mg KOH/g) 321.2

Amin value (mg KOH/g) 150.5

Acid value (mg KOH/g) -

1H-NMR spectrum of
REPUPOL

ATR-IR spectrum of
REPUPOL

Automotive seat cushion

Flexible PU Automotive seat cushion

Crushing

Depolymerization

Separation

Purification

REPU-POL F3

Sample Analysis Data

Recovery rate (%) 54.8

Specific density -

Viscosity at 25°C 1,674

OH number (mg KOH/g) 169.7

Amin value (mg KOH/g) 74.9

Acid value (mg KOH/g) 0.06

1H-NMR spectrum of
REPUPOL

ATR-IR spectrum of
REPUPOL

Depolymerization of Rigid Polyurethane

Rigid PU foam

Crushing

Depolymerization

Purification

REPU-POL R1

Characterization of
REPUPOL R3

Recovery rate (%) 87

Specific density -

Viscosity at 25°C 20,000~30,000

OH number (mg KOH/g) 403.2

Amin value (mg KOH/g) 207.9

Acid value (mg KOH/g) 0.59

1H-NMR spectrum of
REPUPOL

ATR-IR spectrum of
REPUPOL

Foaming test based on recycled polyol content

Recycled polyol content	Gell Time (s)	Tack Free Time (s)	Rising Time (s)	Rising Length (cm)	Foam weight (g)	Density (kg/m3)
1(5%)	65	120	90	121	48.94	48.23
2(10%)	58	135	76	11.8	48.21	48.38
3(15%)	51	103	83	12.0	49.06	50.23

RPU Material Separation
Technology

Our technology uses a low-cost organic solvent to selectively dissolve polyurethane (PU) and nylon, while polyester remains solid.
High-purity nylon crystals are obtained through recrystallization,
enabling efficient recycling of synthetic fibers and composites in an eco-friendly and cost-effective way.

Inexpensive organic solvent is utilized to adjust the solubility of the polymers in textile blends, mixed plastic wastes

PU and nylon are completely dissolved in the liquid solution, while polyester remains as a solid

Pure nylon granules are obtained by recrystallization

How does it work