Luperox® for Polymerization of Vinyl Chloride

Luperox® organic peroxides boost productivity of vinyl chloride polymerization.

Arkema Luperstop® and Term-N-Ator® shortstoppers can add control to your polymerization reaction.

A Range of Solutions

The wide range of Luperox® organic peroxides is well adapted to suspension process for polymerizations of vinyl chloride.  The reaction is generally performed between 40 and 80°C over 3 to 10 hours. The molecular weight and density of the polymer can be regulated by temperature in the reactor. Temperature is constant during polymerization for a given grade, for example, K-67 is typically manufactured at 57°C.




Suspension polymerization represents a large majority of worldwide polyvinyl chloride production. The main characteristics of this process are:


  • Batch technology
  • Reaction in water, liquid vinyl chloride in droplets of lower than 50 µm
  • Autoclave reactor: 8-12 bars, 50 - 70°C
  • Polymerization conducted up to 75% conversion
  • Reaction finished or stopped at about 90% conversion

Peroxide Selection

Increased productivity in vinyl chloride polymerization is achieved when the thermal energy generated by peroxide decomposition is as constant as possible. For this reason, a selection of several peroxides is recommended:


  • A high activity, short half-life peroxide to quickly start the reaction
  • A medium half-life peroxide to continue the reaction
  • A long half-life peroxide to achieve good monomer conversion


Half-Life (°C) Peroxide Recommended K Value Reaction Temperature (°C) Application
  • Luperox® 610
  • Luperox® 188
≥ 70 < 54 Flexibles
  • Luperox® 223
  • Luperox® 10
≥ 67 57 Pipe/Profile
  • Luperox® 554
  • Luperox® 11
  • Luperox® 219
  • Luperox® LP
≥ 62 > 60 Rigid Film/Sheet

Peroxide Emulsions

Emulsions of peroxide in water offer unique advantages:


  • Water in the formulation acts as a heat-sink, reducing risk of ignition
  • Fish-eyes in the resins can be reduced
  • Faster dispersion in the reactor
  • Improvements in waste water treatment


Arkema is offering a range of emulsions to the PVC industry.

Browse products and solutions:

Luperox® 610

3-hydroxy-1,1-dimethylbutyl peroxyneodecanoate


Luperox® 546

tert-amyl peroxyneodecanoate



Luperox® 10

tert-butyl peroxyneodecanoate



Luperox® 219

di-(3,5,5-trimethylhexanoyl) peroxide



Luperox® LP

dilauroyl peroxide



Luperox® 188

cumyl peroxyneodecanoate



Luperox® 225

sec-butyl peroxydicarbonate





Find the right product for your application!

Contact the Luperox® salesperson in your region to learn more

North America

Jay Divyesh SHAH
Digital & Market Manager

Central America

Monserrat ALVAREZ
Sales Manager
Arkema Mexico SA de CV
Gustavo Baz 2160 - 3, La Loma, Tlalnepantla, Mexico 54070

South America

Business Unit Manager
Arkema Quimica LTDA
Avenida Ibirapuera 2033 4° Andar - Bairro Moema CEP 04029-901 SÃO PAULO (SP) BRASIL

Europe and Africa

Business Manager
420 rue d'Estienne d'Orves 92705 Colombes Cedex FRANCE


Sales Manager
Arkema Peroxides India Private Ltd
1st Floor, Balmer Lawrie House 628, Anna Salai, Teynampet, Chennai (Madras), India 600 018

Southeast Asia

Regional Manager
10 Science Park Rd #01-01A, The Alpha, Singapore Science Park II, Singapore 117684

Far East

Jonathan CHANG
Greater China Sales Director
Arkema Changshu Chemical Co Ltd
7F Block 1, Life Hub@Daning 1868 Gonghexin Rd. Shanghai 20072 CHINA

Middle East

Sales Manager
ARKEMA FRANCE, Middle East Office
Unit 2801 Indigo Icon Tower, Dubai UAE