We have over ten years of application data supporting renewable resins detailing the performance advantages we can provide. We have designed esters that are completely derived from renewable resources, materials that are readily biodegradable, and products that are both renewable and biodegradable. By working closely with our customers as well as resin producers, Hallstar is able to deliver solutions that not only solve a problem, but help provide tools for next generation products.

Hallstar esters offer improvement for a range of parameters including: low temperature flexibility, volatility resistance, extraction and migration resistance. We design our products to deliver performance that will solve your unmet needs and accelerate your ability to design for the next generation.

Hallstar is able to deliver solutions that not only solve a problem, but help provide tools for next generation products.

Polyvinyl Chloride

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Polyvinyl chloride resin (PVC) comes in different grades for different applications; i.e., plastisol-grade resins contain surfactants and have a smaller particle size. Calendering-grade resin has a tighter particle size average.

Processing flexible PVC resin to be fabricated by hot melt processing is almost always mixed with formulating ingredients in a dry blend (powder-mix) as the first step. A typical PVC compound contains PVC resin, stabilizer, plasticizer, pigments and lubricants.

Dry blending is a compounding technique used in preparing PVC formulations for subsequent fluxing and forming. Dry blending consists of mixing the solids of the PVC formulation with the liquid ingredients in a manner that results in a uniform, dry, free-flowing powder. Then the dry blend is fluxed in any fusion device into a formable hot melt. The hot melt may then be fabricated by extrusion through a die, injection into a mold, calendering into a film, blow, compression or transfer molding and conversion into pellets or cubes that are re-melted at a later time.

Plastisol PVC resin to be fabricated by plastisol technology is wet-mixed with plasticizers and other formulating ingredients into dispersions of resin/solids in the liquid components of the formulation. This dispersion is known as a plastisol. It is formed into a useful shape and gelled with heat and fused by further heating, then cooled. Typical ingredients of a plastisol formulation: dispersion resins, blending resins, plasticizers, stabilizers, fillers, pigments, thinners, blowing agents, viscosity modifiers, flame-retardants, smoke suppressants, adhesion promoters, release agents, and air release promoters.

A plastisol viscosity is one of the most important characteristics of the PVC formulation because of the various kinds of processing techniques such as spread coating (knife, roll and rotary screen coating and saturating), molding (dipping, rotocasting, slushing, cavity, or in-place), extrusion, strand, curtain, and spray coating.

Our products and brands for PVC:

Hallstar has over 30 different monomeric and polymeric plasticizers for a wide range of applications and compound characteristics – HT, LT, printability and more.

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View PET/PBT Products

Polyethylene terephthalate and polybutylene terephthalate (PET/PBT) are both thermoplastic polymers, often used in the production of plastic bottles (PET), and automotive and household products (PBT).

PET is used in drink bottles since it is an excellent water and moisture barrier. Both materials are crystalline in nature and during processing may require help nucleating their structures to ensure they bond correctly.

Our products and brands for PET/PBT:

TegMeR® 809 is a popular nucleating agent to help process PET/PBT faster.

Polyvinyl Butyral (PVB)

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Polyvinyl butyral (PVB) is a resin whose major function is in laminated safety glass for architectural glass and automobile windshields.

The PVB layer forms a sheet bonded between two glass panels. The PVB interlayer is visually clear and helps bind the two panes of glass together. Once sealed, the two panes and interlayer appear as one seamless piece of glass, so the PVB film must be crystal clear. There are only a few plasticizers that dominate the market for manufacturing PVB film.

Our products and brands for PVB:
TegMeR® 803 is a common PVB modifier.


View PLA/PHA/PSM Products

Polylcatic acid (PLA), polyhydroxylalkonate (PHA) and starch based (PSM) are the three major renewable bio-polymers. PLA (poly lactic acid) is a biodegradable thermoplastic polymer that is sourced from renewable feedstocks. PLA is a rigid and transparent polymer that can be processed by extrusion, injection molding, film and sheet casting, and spinning giving rise to a wide range of end use applications.

PHA (polyhydroxy alkanoate) is also derived from renewable feedstocks but differ from PLA in that PHA is UV stable, low water permeation and more heat stable. PHA polymers are also thermoplastic and can be processed on conventional processing equipment, and depending on their composition are more ductile and elastic than PLA. One drawback, PHA is typically opaque.

PSM (plastarch material) is a biodegradable, thermoplastic resin. It is composed of starch combined with several other biodegradable materials. The starch is modified in order to obtain heat-resistant properties, making PSM one of few bioplastics capable of withstanding high temperatures. The high heat tolerance and other superior manufacturing characteristics make it a great fit for conventional processing equipment. Just like drawback of PHA, PSM is also opaque.

Our Hallgreen® esters were specifically designed to be compatible with these biopolymers and help these producers and compounders broaden their applications and reach new markets.

As process aids, these esters:

  • Reduce melt viscosity
  • Reduce melt/mixing temperature and increase melt flow
  • Reduce energy consumption and torque

As a polymer/impact modifier, these esters:

  • Improve impact resistance
  • Improve low temperature flexibility
  • Help sheet integrity for blown film applications
  • Improve extruder processing – flow rates and through-puts

View PLA/PHA/PSM Products


View SMC Products

Sheet molded compound (SMC) is a moldable, fiberglass-reinforced polyester made through injection molding.

SMC is used in many different applications, from automotive body panels to jet skis and utility tubs. SMC is made by combining (unsaturated) polyester resin with short strands of chopped fiberglass along with other fillers and additives. Parts are typically economical and easy to reproduce.

One of the important additives is a thickening agent that makes the resin mixture set up or cures so it is ready to be molded. Both Maglite® magnesium oxides/hydroxides and calcium oxides/hydroxides are used as SMC thickeners.