Introduction to PVC Gelation and Formulation - All Things PVC Part I

June 23, 2021
This is part I of the "All Things PVC" workshop series.





While introducing the general properties of PVC suspension resin that make it unique for processors, the speaker will discuss why PVC formulations can get complicated and present so many options for optimized processing and customization by application. The focus will mostly revolve around suspension PVC for rigid vinyl applications, but touch upon some basics of plasticized or flexible vinyl as well. The speaker will talk about gelation theory, why lubricant balance is important and how different additives can influence rheology, mechanical performance, and even weatherability. The talk will be an introduction to PVC overall but also a lead-in for the next workshop, an introduction to acrylic impact modifiers and core-shell modifier chemistry.

About the Speaker

Kevin Yocca has been working as a materials scientist and polymer engineer in the plastics industry since 2008. He has completed projects for plastic materials including acrylic copolymers, biorenewable plastics, and PVC along with the additives for the respective resin types. Kevin’s research has largely focused on PVC where he has experience with acrylic additives, organotin stabilizers, and PVC lubricants. Kevin is a graduate of Penn State University and the University of Minnesota.

His professional experience is as follows:

Arkema, Inc., King of Prussia, PA. 2010 – 2012, 2014 to present. Continuing his career with Arkema in technical service and R&D, Kevin focused on new acrylic additives for cellular PVC and rigid PVC profiles and additives for PLA and bioplastics. Kevin helped commercialize new high molecular weight process aids for foamed PVC, high efficiency impact modifiers for rigid PVC, and helped to develop new PVC matting agent technology. In January 2021, Kevin took on the role of Global Market Manager in Building and Construction for Plastics Additives responsible for identifying unmet market needs and driving commercial development of new technologies in B&C applications globally.

PMC Group (PMC Organometallix), Lansdale, PA. 2012 – 2014. Technical Service Manager helping PVC customers with organotin stabilizers and lubricants. Kevin was responsible for the transition of the legacy Arkema and Rohm and Haas organotin stabilizer technical service and products to PMC Group through acquisition. Kevin designed and assembled PMC’s new Center for Vinyl Innovation, a laboratory in Lansdale, PA, centering on serving the PVC industry for new product development and customer technical service.

Rohm and Haas Co. Spring House, PA. 2008 – 2009. Kevin began his career with Rohm and Haas in the plastics additives area responsible for acrylic additives research in acrylic resins, rigid PVC, and acrylic additives for PLA and bioplastics.


University of Minnesota, Twin Cities Campus, MN; September 2007
M.S. in Materials Science and Engineering
Thesis Topic: Rheology of and Capillary Electrophoresis in Soft F127 Gels

Pennsylvania State University, University Park, PA; May 2005 B.S. in Materials Science and Engineering
Polymer Science and Engineering Option

Presentations to the Industry

  • Organotin Stabilizers from Renewable Resources, M. Lavach and K. Yocca, Vinyltec® 2010, Woodbridge, NJ, October 2010.
  • REACH, PVC, and Organotins: Registration, Evaluation and Authorization of Chemicals and the Globally Harmoized System (GHS), M. Lavach, M. Cochran, K. Yocca, Profiles 2012, Philadelphia, PA, June 2012.
  • Organotin Stabilization & Lubrication, K. Yocca, Vinyltec® 2013 Tutorial Woodbridge, NJ, October 2013.
  • Hazard Communication and the Globally Harmonized System (GHS) Overview. K. Yocca, AAMA 2014 National Conference – Spring, Environmental Stewardship Work Group, Naples, FL, February 2014.
  • Melt Strength and Cellular PVC, K. Yocca and Z. Cherian, Profiles 2015, Philadelphia, PA, June 2015.
  • Controlled Aesthetics in Thermoplastics Through Use of Polymeric Additives, J. Lyons, K. Yocca, SPE Auto EPCON, Troy, MI, May 2016.
  • Chemical Blowing Agent Selection, Melt Strength, and Cellular PVC, K. Yocca, Profiles 2016, Philadelphia, PA, June 2016.
  • Controlled Aesthetics in Thermoplstics Through Use of Polymeric Additives, K. Yocca, J. Lyons, Vinyltec 2016, Woodbridge, NJ October 2016.
  • Controlled Aesthetics in Thermoplastics: Gloss Modifying Additive for PVC, K. Yocca, Plastics Modification: Industrial-to-Medical Products, Innoplast Solutions Atlanta, GA March 2017
  • How to take advantage of latest Ultra-High Molecular Weight processing aids into PVC foam Formulations, A. Vermogen, P. Hajji, K. Yocca, PVC Formulations Brighton, UK April 2017
  • Controlled Aesthetics in Thermoplastics: Gloss Modifying Additive for PVC, K. Yocca, Profiles 2017, Pittsburgh, PA June 2017
  • DMA to predict Impact Performance in PVC Formulations, J. Lyons and K. Yocca, PVC Formulations 2018, Pittsburgh, PA February 2018
  • Acrylic Impact Modifiers for rigid PVC compound: Composite AIM Technology, D. Chan, A. Vermogen, K. Yocca, PVC Australia 2018, Sydney, AUS March 2018
  • Controlled Aesthetics in Thermoplastics: Modifying Surace Gloss of Vinyl Products, K. Yocca, ACS 2018, New Orleans, LA March 2018
  • Formulating Rigid / Semi-rigid PVC: Acrylic Modifiers, K. Yocca, Vinyltec 2018 Pre-conference PVC 101, Chicago, IL October 2018
  • Acrylic Process Aids for PVC Processing: Highly Filled Formulations and Foamed Layers for LVT, K. Yocca, PVC Formulations 2019, Pittsburgh, PA February 2018
  • Acrylic Impact Modifiers and Process Aids [Pre-conference PVC 101], K. Yocca, Vinyltec 2019, Akron, OH October 2019
  • PVC Substrate Formulations: Acrylic additive selection for improved processing and impact strength, K. Yocca and E. Peterson, PVC Formulations 2021 – virtual, April 2021

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