Alcotex PVOH

Unique polyvinyl alcohol suspending agents for PVC manufacture

Synthomer’s Alcotex polyvinyl alcohols have been specially developed for use as suspending agents for vinyl chloride suspension polymerisation in the manufacture of PVC. Alcotex products allow you to produce PVC with a wide range of porosities and bulk densities, and provide you with excellent grain size control at cost-effective concentrations. As a result of their long track record of success, Alcotex products have become a critical component of PVC suspension recipes, with the performance to help you achieve your required polymerisation characteristics. Our unique process for polymerisation and hydrolysis imparts key characteristics to the polyvinyl alcohol, giving a robust, universal product for many PVC technologies and PVC resin types. 

Boost your PVC production output while reducing costs

Alcotex primary and secondary suspending agents provide you with many benefits for your PVC production process, achieving desired resin characteristics at cost effective concentrations. They help you achieve higher plant output and lower operating costs, providing low polymer build-up in the reactor, reduced down-time for cleaning, and homogeneous porosity of the PVC grains, enabling easier free monomer removal. The homogeneous porosity also improves plasticiser absorption properties and can be adjusted to give fast dry-up times and a low “fish-eye” count, reducing the reject level in critical applications.

  • High efficiency.
  • High compatibility.
  • High plant output.
  • Low fish-eye count.
  • Low reactor fouling.
  • Low residual monomer

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Recommended Products

Group Tradename Chemistry Description
ALCOTEX ALCOTEX 234 OTH Synthomer Ltd has developed Alcotex 234 for use in conjunction with Alcotex 225 as a buildup suppressant for vinyl chloride suspension polymerisation. It eliminates build-up on the reactor baffles and stirrer or areas of poor surface quality. Use of Alcotex 234 will lead to a substantially higher number of production runs before the reactor has to be opened and pressure cleaned. This results in higher productivity rates and a better quality PVC resin.
ALCOTEX ALCOTEX 432P PVOH Alcotex 432P is a 43% hydrolysed polyvinyl alcohol supplied as a low viscosity methanol based solution. It has been specifically developed by Synthomer Limited as a secondary suspending agent for vinyl chloride suspension polymerisation. It may be used in conjunction with conventional primary suspending agents. In optimised recipes, improvements can be obtained in the porosity/bulk density relationship. Better porosity facilitates both monomer removal and plasticiser uptake. These criteria are further enhanced when Alcotex 432P is used with the Alcotex range of primary suspending agents.
ALCOTEX ALCOTEX 45 PVOH Alcotex 45 is a 45% hydrolysed polyvinyl alcohol supplied as a low viscosity solution in a water/isopropyl alcohol solution. It has been specifically developed as a secondary suspending agent for vinyl chloride suspension polymerisation. It may be used in conjunction with conventional primary suspending agents. In optimised recipes, improvements can be obtained in the porosity/bulk density relationship. Better porosity facilitates both monomer removal and plasticiser uptake. These criteria are further enhanced when Alcotex 45 is used with the Alcotex range of primary suspending agents. NMR measurements have shown that Alcotex 45 has a random distribution of acetate groups.
ALCOTEX ALCOTEX 55-002H PVOH Alcotex 55-002H is a colloidal dispersion of polyvinyl alcohol. It has been specifically developed by Synthomer Ltd as a secondary suspending agent for vinyl chloride suspension polymerisation. It may be used in conjunction with conventional primary suspending agents. In optimised recipes, improvements can be obtained in the porosity/bulk density relationship. Better porosity facilitates both monomer removal and plasticiser uptake. These criteria are further enhanced when Alcotex 55-002H is used with the Alcotex range of primary suspending agents. NMR measurements have shown that Alcotex 55- 002H has a random distribution of acetate groups.
ALCOTEX ALCOTEX 552P PVOH Alcotex 552P is an aqueous solution of a 55% hydrolysed polyvinyl alcohol. It has been developed by Synthomer Ltd as a porosity enhancement agent for PVC suspension polymerisation. It has a low residual methanol content. Alcotex 552P can be used in conjunction with conventional primary suspending agents. In optimised recipes, improvements can be obtained in the porosity/bulk density relationship. Better porosity facilitates both monomer removal and plasticiser uptake. These criteria are further enhanced when Alcotex 552P is used with the Alcotex range of primary suspending agents. NMR measurements have shown that Alcotex 552P has a random distribution of acetate groups.  
ALCOTEX ALCOTEX 72.5 PVOH Alcotex 72.5 is a polyvinyl alcohol which has been specially developed for use as a primary suspending agent for vinyl chloride suspension polymerisation. It is manufactured by Synthomer Ltd using our exclusive process which has advantages over other manufacturing methods, in that it allows more efficient control over the degree of hydrolysis and particle size of the product. 
ALCOTEX ALCOTEX 7206 PVOH Alcotex 7206 is a 72.5% hydrolysed, low/ medium molecular weight polyvinyl alcohol which has been specially developed for use as a primary suspending agent for vinyl chloride suspension polymerisation. NMR measurements have shown that Alcotex 7206 has a blocky distribution of acetate groups.
ALCOTEX ALCOTEX 80 PVOH Alcotex 80 is an 80% hydrolysed high molecular weight polyvinyl alcohol which has been specially developed for use as a primary suspending agent for vinyl chloride suspension polymerisation.
ALCOTEX ALCOTEX 8847 PVOH Alcotex 8847 is an 88% hydrolysed polyvinyl alcohol for use in speciality applications such as vinyl acetate containing copolymer resins as well as in standard grades. Alcotex 8847 is a high molecular weight polyvinyl alcohol giving a high colloidal stability in PVC suspension polymerisation.
ALCOTEX ALCOTEX B72 PVOH Alcotex B72 is polyvinyl alcohol which has been specially developed for use as a primary suspending agent for vinyl chloride suspension polymerisation. It is manufactured by Synthomer UK Ltd. using our exclusive manufacturing process which has advantages over other manufacturing methods, in that it allows more efficient control over the degree of hydrolysis and particle size of the product. NMR measurements have shown that Alcotex B72 has a block distribution of acetate groups.
ALCOTEX ALCOTEX B78 PVOH Alcotex B78 is polyvinyl alcohol which has been specially developed for use as a primary suspending agent for vinyl chloride suspension polymerisation. It is manufactured by Synthomer using our exclusive batch process which has advantages over other manufacturing methods,in that it allows more efficient control over the degree of hydrolysis and particle size of the product. NMR measurements have shown that Alcotex B78 has a block distribution of acetate groups.
ALCOTEX ALCOTEX WD100 PVOH Alcotex WD100 is an aqueous solution of a 43% hydrolysed polyvinyl alcohol. It has been specifically developed by Synthomer Ltd as a secondary suspending agent for vinyl chloride polymerisation. Infinitely dilutable in water, and with an extremely low methanol content, Alcotex WD100 offers increased PVC resin porosity and reduced levels of gels or ‘fish eyes’ when compared to traditional products.In optimised recipes, improvements can be obtained in the porosity/bulk density relationship. Better porosity facilitates both monomer removal and plasticiser uptake. These criteria are further enhanced when Alcotex WD100 is used with the Alcotex range of primary suspending agents.  Alcotex WD100 is also compatible with other conventional primary suspending agents. NMR measurements have shown that Alcotex WD100 has a random distribution of acetate groups. The data below represents typical values obtained with different batches of Alcotex WD100.

Discover how Synthomer’s Alcotex products can help improve your PVC manufacturing

Contact our technical specialists for a no-obligation discussion of how Synthomer’s Alcotex polyvinyl alcohols can help improve your PVC manufacturing operations.

eMail: info@synthomer.com
Phone: +44 (0) 1279 436 211

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