RiPurpose™ Olig1000-700

Green Feedstock for Renewable Polymers

Produced from 100% post-consumer plastic


Target Applications

Polyethylene Terephthalate




RK005About RiPurpose Olig1000-700

RiPurpose Olig1000-700 is produced by the chemical breakdown of post-consumer waste polyethylene terephthalate (PET) plastic collected from the ocean and environment. This product contains oligomers with terminal hydroxyl and carboxylic acid functional groups. This sustainable and green co-monomer can be used as a direct replacement for petroleum-derived feedstock to produce high-value renewable and upcycled polymers by polycondensation and transesterification reactions. RiPurpose Olig1000-700 can be directly used as a feedstock during the polycondensation step of PET production, thereby avoiding the esterification step to prepare a prepolymer intermediate. By using this recycled feedstock, customers can claim CO2 emission reduction of up to 60% for their end-use polymers. Our product line will enable customers to create a circular economy and decarbonize polymer industries while addressing environmental and water-borne waste plastic challenges, and preserving fossil resources; thus, creating a positive societal impact.


Technical information

The development of PET oligomer addresses several of the problems prevalent with conventional PET recycling progress by providing a versatile precursor for further modifications [1]. This oligomeric material has both alcohol and acidic end groups which enable a wide array of applications. For example, the material can be utilized as an initiator for ring-opening polymerization of various monomers, such as caprolactone, which can be used to make PET-co-caprolactone copolymers that can be utilized as compatibilizers in polymer blends [2,3]. Additionally, polycondensation can be performed with a wide variety of materials to create novel polymeric materials. An example of this is the co-reaction between PET and poly(tetramethylene oxide) which has been reported recently in literature for the creation of versatile multi-blocks segmented poly(ether-ester)s such as poly(ethylene terephthalate-co-1,4-cyclohexanedimethylene terephthalate)-block-poly(tetramethylene oxide) which has highly controlled melt and mechanical properties [4].


Further modification of the polymer can be achieved by initially reacting it with an excess quantity of ethylene glycol under polycondensation to convert the precursor into a di-alcohol endcap product. This can subsequently be reacted with isothiocyanates to form PET-polyurethanes in which case the PET behaves as a chain extender in the stepwise reaction [5]. Similarly, a reaction with diglycidyl compounds can be used for the preparation of epoxies. Conversely, a reaction with excess terephthalic acid can convert into a diacid form. This can subsequently be reacted with diamines in a polycondensation condition to form polyamides [6]. The potential applications for this versatile precursor are diverse and hold great promise for further development.


PET uses


Case Study

Renewable PET: Renewable PET was synthesized by partially or fully replacing the conventional PET feedstock with RiPurpose Olig1000-700.


Ordering information

Catalog Number Description Price Buy
RK005RiPurpose Olig1000-700 - PCT/US2023/013631 (WO 2023/164000 A1)
$40.00 /10g
Stock Check/COA

  • Price does not include shipping/handling and applicable sales tax
  • This product is for research use only and it is not intended for use in humans or for in vitro diagnostic use.
  • Terms and Conditions Apply
  • Utilize discount code RIPURPOSE10 at check out to receive a 10% discount on RiPurpose products.

RiPurpose™ is a trademark of RiKarbon, 550 S. College Ave, Suite 107, Newark, DE 19713. For more information about RiPurpose and RiKarbon visit www.rikarbon.com.



  1. Jankauskaite, Virginija, Gintaras Macijauskas, and Ramūnas Lygaitis. "Polyethylene terephthalate waste recycling and application possibilities: a review." Mater Sci (Medžiagotyra) 14.2 (2008): 119-127.
  2. Laurienzo, Paola, Barbara Immirzi, and Mario Malinconico. "A Preliminary Investigation on the Use of Poly [(ethylene terephthalate)‐co‐(ε‐caprolactone)] Copolymer as Compatibiliser of HDPE/PET Blends." Macromolecular Materials and Engineering 286.4 (2001): 248-253.
  3. Ben Gara, M., W. Kammoun, C. Delaite, S. Abid, and R. El Gharbi. "Synthesis and Characterization of Aliphatic-Aromatic Copolyesters From Pet Waste and ϵ-Caprolactone.Journal of Macromolecular Science 52.6 (2015): 454-464.
  4. Paszkiewicz, Sandra, et al. "Synthesis and characterization of poly (ethylene terephthalate-co-1, 4-cyclohexanedimethylene terephtlatate)-block-poly (tetramethylene oxide) copolymers." RSC advances 7.66 (2017): 41745-41754.
  5. Zhou, Xing, et al. "Synthesis and characterization of waterborne polyurethane dispersion from glycolyzed products of waste polyethylene terephthalate used as soft and hard segment." International Journal of Adhesion and Adhesives 74 (2017): 49-56.
  6. Peng, Shumin, et al. "A novel synthetic strategy for preparing semi‐aromatic components modified polyamide 6 polymer." Journal of Polymer Science Part A: Polymer Chemistry 56.9 (2018): 959-967.



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