US 2512697

Patent Overview — US 2512697 A

Title: Method of making synthetic rubber carbon black compositions without mastication

Patent number: US 2512697 A
Application number: US 527929 A
Inventor: Grotenhuis, Theodore A. Te
Original assignee / current assignee (as listed): Individual
Priority date: 1944-03-24
Filing date: 1944-03-24
Publication (grant) date: 1950-06-27
Anticipated expiration: 1967-06-27; status listed as "Expired - Lifetime"
Source: https://patents.google.com/patent/US2512697/en

Purpose (from title and indexed terms): The disclosed method makes synthetic rubber–carbon black compositions without mastication — i.e., avoiding the mechanical working step otherwise associated with incorporating carbon black into rubber. The indexed terminology centers on carbon black, emulsion, monomer, water, polymer, emulsifying agent, thickening agent, elastomer, polymerization, latex, and dispersing agent, indicating an emulsion-polymerization route in which carbon black is present in the aqueous medium during polymerization of monomers (butadiene, styrene, isoprene, and related dienes/hydrocarbons all appear in the description terms).

Plain-language scope: Rather than blending carbon black into already-formed rubber, the process appears to combine carbon black with an aqueous emulsion system containing the monomer(s), emulsifying agent, and thickening agent, so that the polymer forms in the presence of the black. This yields a polymer–black composition directly, avoiding mastication. Terms such as latex, wetting, dispersion, agglomeration, flushing procedure, and "aqueous phase" suggest the black is wetted/dispersed in water and stabilized against agglomeration during polymerization; the resulting product is described as suitable for molding, compounding, and rubber-like applications.

What this excerpt does not establish: It does not give the actual claim language, the full written description, working examples, proportions, or process conditions (temperatures, catalyst/initiator specifics, pH control). It does not establish the identity of the real party in interest, any subsequent chain of title, or the legal status as anything more than an assumption as stated on the source page. It also does not establish the validity, enforceability, or scope of any claim, nor any litigation or prior-art relationship. No claim construction should be inferred from the indexed keyword counts alone.