Process for preparing grafted rubber latices free of coagulum
AssigneeMonsanto Company
InventorsWilliam O. Dalton, Glenn B. Hilton
Life of this patent
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Abstract
There is disclosed a process for preparing a latex comprising grafted rubber particles for ABS polyblends that is free of coagulum, the steps comprising, preparing said latex and passing it through a porous filter bed means comprising agglomerated particles of said latex, removing said coagulum and producing a filtered latex. The process also includes the steps of blending said latex with a matrix polymer latex to form a mixed latex and coagulating said mixed latex and recovering said grafted rubber particles and matrix polymer as an ABS polyblend.
Claims19
In a process for filtering coagulum from a latex comprising grafted rubber particles for ABS polyblends wherein said latex is passed through a filter bed medium, the improvement comprising:
- coagulating a portion of said latex as agglomerated particles comprising said grafted rubber particles, and separating said agglomerated particles from said latex,
- preparing a porous filter bed means comprising said particles wherein said particles have a particle size such that the interstices between said particles are sized to pass said latex rubber particles and retain said coagulum, and
- passing said latex containing said grafted rubber particles through said filter bed means removing said coagulum and providing a filtered latex.
Dependencies are inferred from the claim text.