Product Description

Rogers Corporation manufactured Rogers RX-611 as part of its line of asbestos-filled phenolic molding compounds. Phenolic resins — derived from the condensation of phenol and formaldehyde — served as the dominant thermoset matrix for electrical, automotive, appliance, and industrial parts through the 1940s–1970s asbestos era, valued for their dimensional stability, dielectric strength, heat resistance, and mechanical strength under load. Rogers RX-611 was produced in two color grades — green and black — with both grades containing chrysotile asbestos in certain formulations, as documented in Rogers Corporation’s answers to plaintiff interrogatories in U.S. asbestos litigation. Rogers RX-611 was a thermoset phenolic molding compound engineered for compression and transfer molding of electrical switchgear components, circuit breaker arc chutes, and barrier insulators.

Documented Applications and Recipient Facilities

Rogers RX-611 was documented in publicly filed publicly filed asbestos litigation records as supplied to electrical equipment manufacturers in lot quantities ranging from approximately 600 to 2,000 pounds per shipment across the years 1979 through 1995. Specifically named recipient locations in those records include the Square D Company plants at Cedar Rapids, Iowa and Columbia, Missouri, where the Square D QO circuit breaker line was manufactured. RX-611 was used in compression and transfer molding of asbestos-filled phenolic arc chutes, barrier insulators, and interrupter components.

Asbestos Content

Rogers RX-611 is identified in publicly filed asbestos litigation records as an asbestos-filled phenolic molding compound, meaning asbestos fiber was an intentional and primary constituent of the product formulation rather than an incidental contaminant. The fiber loading in such compounds could constitute a substantial percentage of the product by weight, as the asbestos served multiple functional roles: reinforcing the resin matrix, improving tensile and flexural strength, extending heat resistance beyond what the unfilled resin could achieve, and providing dimensional stability during thermal cycling.

Once fully cured, phenolic molding compounds encapsulate the fiber within a hardened resin matrix. However, the bonded state of fibers in a finished molded part does not eliminate exposure risk across the full product lifecycle. Asbestos fibers in such materials become releasable during mechanical processing, machining, finishing operations, and whenever the cured part is cut, drilled, ground, or abraded.

How Workers Were Exposed

Litigation records document that industrial workers encountered Rogers RX-611 and similar asbestos-filled phenolic compounds at multiple stages — from raw material handling through finished-part fabrication and downstream use:

  • Compound handling and hopper loading — transferring asbestos-filled phenolic compound from drums or bags into press hoppers; one of the highest-exposure tasks documented in phenolic molding operations
  • Compression and transfer press operation — hot molding releases compound dust when molds open between cycles
  • Tumbling, deflashing, and machining — finishing operations on cured phenolic parts release fiber from the matrix
  • Assembly and sub-assembly — fitting phenolic-molded components during switchgear and breaker build-up
  • Quality control and rework — disassembly during calibration and rebuild exposes workers to phenolic-part dust
  • Receiving, stockroom, and shipping — moving phenolic compound (drums, bags) and finished components

Documented Recipient Facilities

  • Square D Company — Cedar Rapids, Iowa (QO circuit breaker manufacturing)
  • Square D Company — Columbia, Missouri (training facility 1977 → full plant 1978; QO breaker manufacturing through ~1985)
  • Related Square D plants in the QO three-plant network (Lincoln, Nebraska — thermoset injection molding) likely also received Rogers-supplied compounds via Square D’s national procurement
  • Additional downstream end-user facilities receiving Rogers RX-611 in switchgear and breaker components

Workers exposed to Rogers RX-611 at any documented recipient facility — or to similar asbestos-filled phenolic compounds at downstream end-user facilities — may have legal rights if they have since been diagnosed with mesothelioma, asbestosis, lung cancer, or another asbestos-related disease. Asbestos-related diseases can develop silently for 20, 30, or even 40 years after initial exposure.

Free, confidential case evaluation: Speak with O’Brien Law Firm — (314) 936-2956

All consultations are free. No fee unless a financial recovery is made on your behalf.