Polish version

Polyesterols for polyurethanes

A brief description of the process

Polycondensation of the reaction mixture is carried out at temperature 200–230 °C in a inert gas, with continuous stirring and condensate collecting. In the technology waste poly(ethylene terephthalate), vegetable oils (rape, soya and sunflower), by-products and waste products emerging in technologies dealing with processing of various chemical products (glycerin, mixtures of dicarboxylic aliphatic acids, aromatic acids, hydroxyacids and their derivatives) are used.

Advantages of the technology offered

Usage of up to 80 % waste materials. They are characterized by a wide range of physicochemical properties (acid number, hydroxyl number, viscosity, functionality, reactivity, molecular weight etc.), what enables their widespread application and allows to obtain products of various utility properties.

Economical advantages – consumption of cheaper and available waste materials, by-products and bio-renewable materials in the amount up to 80 wt. % of input raw materials (depending on the polyesterol type) substantially reduces production cost, compared to the input cost if technical petrochemical raw materials were used.

Ecological advantages – usage of waste materials (PET), by-products (alcohols, multi-carboxyl acids) and bio-renewable materials (oils of agricultural origin), contributes to protection of the environment.


Typical apparatus to produce polyesters (unsaturated polyester resins, alkyd resins and polyesterols).

Advancement of proceedings

Works of the laboratory scale have been completed. In case of some types of polyesters there have been completed studies on the experimental (half-technical) scale.


There have been received patents for the method to obtain polyesterols. If in further researches were obtained original solutions, new patent applications are anticipated.

Market competitiveness

Wide-ranging assortment for various applications. There has been stated full usability of the new polyesterol group to produce polyurethane foamy materials, glues, lacquers, solid screed masses and as modifiers (plasticizers) for epoxy and phenolic resins.

Significantly reduced input material cost.

Type of expected cooperation

Production launching. Research concerning application of polyesters to manufacture new polyurethane products. The Institute has compiled Material Security Data Sheets for products worked out within the development project and depending on the interest by receivers and destination of particular type of polyesterol we are able to hand over these materials to potential clients, with guidelines concerning their application.


phone: + 48 22 568 28 46