Sustainable & digital engineering Industrial Decarbonisation & innovative processes

Process for producing high-quality recycled PVB

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PVB is a component of laminated glass (car windscreens, glazing, etc.), the recycling rate for which is currently very low. Tens of thousands of tonnes of PVB are produced each year from end-of-life glazing and are generally landfilled.

COMPETITIVE ADVANTAGES

  • Process carried out in an aqueous medium with dilute reagents that are non-toxic, non-flammable and at low temperatures
  • Equipment commonly used in industry
  • Easy recycling of the reaction medium
  • Method transferable to industrial scale

APPLICATIONS

  • Automotive
  • Architecture
  • Photovoltaic cells
  • Paints/Adhesives
  • Cosmetics

INTELLECTUAL PROPERTY

  • Expertise
  • Patent

DEVELOPMENT STAGE

Laboratory validation of the technology

LABORATORY

pictrogramme d'illustration
  • LGC

Description

A process consisting of detaching and/or loosening the glass splinters fixed to the PVB collected after crushing the glass parts.

Combined and complementary action of ultrasound and the effect of a surfactant added with a base at a suitable temperature not causing degradation in the polymer matrix.

 

Images comparant l'avant et l'après traitement

Technical specifications

  • Glass content after treatment: Undetectable
  • Scale-up of the process carried out in the laboratory: 100g -> 1kg
  • Estimated industrial cost of recycled PVB: < €1/kg