The asbestos-phenolic compound market was dominated by a concentrated group of manufacturers from the 1930s through the late 1970s. The companies below are the major documented manufacturers of asbestos-filled thermoset plastic compounds. Each has a separate page covering their plants, product lines, asbestos-era timeline, and publicly documented litigation history.

Compound manufacturers (the raw-material defendants)

  • Union Carbide Corporation (Bakelite) — Bound Brook, NJ; Pittsfield, MA. The most-litigated asbestos-phenolic defendant. Approximately 40% of Union Carbide phenolic compound production may have contained asbestos in 1969 per a court record entered in New York asbestos litigation against Durez and Union Carbide (2013). Continued asbestos use through ~1977.
  • Monsanto Chemical Corporation (Resinox) — Springfield, MA (Plastics Division plant); St. Louis, MO (divisional HQ). Publicly filed litigation records and alleged witness testimony describe asbestos use in Resinox formulations from 1941 until 1958. Springfield plant workers developed asbestosis; Monsanto launched a company-wide X-ray survey of Resinox Department employees in 1978. Resinox grades 215, 2200, and 3700 Green documented in publicly filed litigation.
  • Durez Plastics & Chemicals — North Tonawanda, NY; Niagara Falls, NY; Kenton, OH. Acquired by Hooker Chemical 1955; later part of Occidental Chemical Corporation. Durite™ branded asbestos-phenolic compounds continued through 1978. Durez-worker mesothelioma settlements appear in public records, in amounts that vary by case.
  • Plenco (Plastics Engineering Company) — Founded Chicago, IL (1934); primary operations Sheboygan, WI. Grade-specific reformulation certifications from around 1972 cover compounds 308, 482, 548, 571, and 574, but Plenco’s own interrogatory answers state asbestos use continued until phased out in 1983. Plenco acquired GE’s phenolic compound business in 1982.
  • Rogers Corporation — Rogers, CT; Manchester, CT. Documented in publicly filed records as having had NIOSH-measured 8-hour TWA asbestos exposures at 140× the then-current exposure limit at some operations. Continued asbestos use through the late 1970s.

Captive molders and downstream specifiers

  • General Electric (GE) — phenolic line — Pittsfield, MA primary plant plus mold shops nationwide. GE was the largest single consumer of phenolic compound in the U.S., reported at ~60 million pounds per year at peak. Continued asbestos use through ~1977. A 2024 Connecticut verdict involving talc-contaminated phenolic compound is part of the publicly reported litigation record.
  • Westinghouse Electric — Micarta — Multiple plants. Micarta™ is Westinghouse’s brand of asbestos-phenolic composite. Trial records identify specific asbestos grades: Grade 102 Molded Micarta (post-1949 asbestos grade), Moldarta 162/170/180 (short asbestos fiber in phenolic), and sheet/tubing under Westinghouse file 44141 Asbestos Phenolic. Current defendant: Paramount Global (f/k/a Westinghouse).
  • Fiberite Corporation — Winona, MN. Manufactured phenolic and other thermoset compounds. Continued asbestos use through the early 1980s. Acquired by Cytec Industries (1997).
  • Haveg Industries (Hercules / Ametek) — Marshallton, DE (900 Greenbank Rd.). Manufactured asbestos-phenolic pipe, fittings, and SILTEMP high-temperature products as a Hercules Incorporated subsidiary. Crocidolite (Blue Asbestos Grade MS-6) purchasing records documented in litigation through 1978. Current defendant: Ametek, Inc. as successor-in-interest.

Why this matters for workers

Every former phenolic-compound worker has a documented chain of exposure: (a) the compound they handled (Bakelite, Resinox, Durez, etc.), (b) the manufacturer that produced it, and (c) the public record of asbestos use by that manufacturer. Trust-fund claims and civil lawsuits both depend on establishing this chain. See Trust Funds for the claim pathways available for each named defendant.