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    Polyanionic
    Cellulose

    Polyanionic cellulose (PAC) by its chemical composition is, as well as CMC, a carboxymethyl ether of cellulose, but with higher degree of substitution in carboxymethyl groups (DS). PACs are the carboxymethyl ethers having degree of substitution between 90-110. Polyanionic cellulose took its name from more anionic character as compared to CMC (molecules possess more negative charge).

    Important
    properties

    Water retention

    Thickening of
    water solutions

    Possibility
    to use as an
    anticrystallizing agent

    Modification of
    rheological
    properties

    Ability to absorb
    on a surface of minerals
    and other particles

    Fields of application

    Used in oil and gas wells drilling as a fluid loss reducing and viscosity control agent.

    PAC LV, PAC MV, PAC HV

    Used in fluid loss control of any technological solutions, suspensions, dispersions, water-based pastes.

    PAC LV, PAC MV, PAC HV

    Technical properties

    Properties PAC LV PAC MV PAC HV
    Appearance Fine-grained free-flowing material of white to beige color
    Water content, %, max 10 10 10
    Degree of substitution
    by carboxymethyl groups,
    in limits
    90-110 90-110 90-110
    Active content of the
    dry-weight technical
    product, %:, min
    65 65 65
    Brookfield viscosity
    of 2,0% solution
    (20 С), mPa*s
    less than 100 100 to 1000 More than 1000
    Water solubility as
    absolute-dry technical
    product, %, min
    97 97 97
    pH-content of 2%
    aqueous CMC solution
    at t 20 С
    6,5-11 6,5-11 6,5-11

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