Thioplast EPS - Epoxydized Polysulfide

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Thioplast® EPS is an epoxy-terminated polysulfide type with low viscosity. The introduction of epoxy-termination into the polysulfide structure results in the formation of a unique polymer which combines the excellent properties of AkzoNobel’s polysulfides with the most desirable features of epoxy-resin systems.

These are:
· Excellent adhesion to most surfaces
· Chemical resistance to many dilute acids, alkalis and solvents
· Mechanical stability and durability.
· High speed of curing at ambient temperatures.

Depending on the field of application, THIOPLAST® EPS can either be used alone or in combination with conventional aromatic glycidylethers and other epoxies. 

Chemistry of THIOPLAST®EPS

The chemical structure is dominated by the polysulfide backbone – SS-, formal units and the highly reactive epoxy end groups. Depending on the type of reaction, the spacer R’ varies.

chemistryThioplastEPS

 

R - polysulfide structure

 

 

–(CH2CH2OCH2OCH2CH2-SS)n- CH2CH2OCH2OCH2CH2-

n = 8 – 20

 

 

R‘ – aliphatic or cycloaliphatic

 

 

 

 

All THIOPLAST® polysulfides can be used as a polymer backbone. This allows a great variability in viscosity and the degree of pre-branching of the resulting EPS types.

 

ThioplastEPS

Product Data Sheets
Thioplast® EPS (EPS 25, EPS 70, EPS 80, EPS 350) (German versions EPS 25, EPS 70, EPS 80, EPS 350)

Adhesives

Our range of THIOPLAST® EPS was developed for use in adhesive applications. These polymers are ideal for the following applications: 

  • Steel and aluminium
  • Concrete (crack repair in particular)
  • Automotive applications

Suitability due to:

  • Good weathering characteristics
  • Primerless adhesion on many substrates
  • Elastic behaviour withstanding vibrations and joint movement
  • Reduced tension in material joints
  • High impact resistance, including low temperatures
  • High stability with regard to thermocycling
  • Chemical resistance to oil and fuels
  • Reversibility of joint

Coatings

Our range of THIOPLAST® EPS was developed for coating applications. Our polymers are ideal for the following applications: 

  • Corrosion protective coatings
  • Marine coatings
  • Coatings for chemical plants equipment
  • Mechanically and chemically stressed coatings

Suitability due to

  • Good weathering properties
  • Strong adhesion
  • High corrosion stability
  • Flexibility
  • Impact resistance
  • Excellent chemical resistance, including sea water

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