Product Description

Plaintiffs alleged in publicly filed U.S. asbestos personal-injury and wrongful-death litigation that Reichhold Chemicals manufactured Reichhold 25158 — also internally designated RCI 25158 in Square D Company purchasing records — as part of its line of asbestos-filled phenolic molding compounds. RCI 25158 is one of multiple Reichhold-supplied asbestos-filled phenolic grades identified in publicly filed asbestos litigation, alongside sibling grades RCI 25310, 25-31 OC, C-F-I, and 25170.

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, arc resistance, heat resistance, and mechanical strength under load. RCI 25158 was allegedly supplied for compression and transfer molding of asbestos-filled phenolic arc chutes, barrier insulators, and interrupter components used in Square D’s QO circuit-breaker line.

Asbestos Content

Plaintiffs alleged in publicly filed litigation that Reichhold RCI 25158 was formulated with asbestos fiber as an intentional and primary constituent — not 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 in electrical service.

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 become releasable during mechanical processing, machining, finishing operations, and whenever the cured part is cut, drilled, ground, or abraded.

Workers Exposed

Litigation records allegedly document that industrial workers encountered Reichhold RCI 25158 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

Allegedly documented Square D recipient plants include Cedar Rapids IA (1955-1990), Columbia MO (1978+), and Lincoln NE (1971+) within the QO circuit-breaker manufacturing network.