Process for producing rubber hydrochloride sheet

Details Process for producing rubber hydrochloride sheet Process for producing rubber hydrochloride sheet

1979-11-05

1981-04-07

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

260771, 264175, 264233, 264343, 264344, B29D 720, B29C 1700, C08C 1916

Patent

active

042605776

ABSTRACT:
An improved process for the production of rubber hydrochloride sheet is described in which a rubber sheet is advanced through a reaction zone essentially in one direction while totally immersed in a solution of hydrogen chloride in an organic solvent capable of swelling the rubber, flotation of the rubber sheet in the reaction solution being prevented, and the slack in the sheet caused by the initial swelling thereof being taken up to keep the sheet in substantially fully extended form to prevent it from contacting itself while in tacky condition, washing the sheet with an organic solvent or mixture thereof capable of removing the entrained, unreacted hydrogen chloride and other contaminants, drying the sheet in air at about 60.degree. C. to 80.degree. C., and calendering the still warm sheet to a finished rubber hydrochloride sheet of uniform thickness; the preferred solvent for both the hydrochlorination and washing operations being ethyl acetate.

REFERENCES:
patent: 1841295 (1932-01-01), Oenslager
patent: 2237125 (1941-04-01), Walton
patent: 2393871 (1946-01-01), Reeves, Jr. et al.

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