polyvinyl alcohol

At room temperature, the pH value of its aqueous solution is generally around 5-7, the viscosity is stable, and it is almost not affected by weak acids, weak bases, or organic solvents (esters, ketones, higher alcohols, hydrocarbons). It has extremely high oil resistance.

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Building Decoration Materials

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1、 Product specifications:

Project	Indicator
Project	YT-I	YT-II
Appearance	White or slightly yellow pulverization	White pulverization
Degree of alcoholysis/% (mol/mol)	87.0～89.0	91.0～93.0
Viscosity/(mPa · s)	20.5～24.5	30.0～36.0
Volatile matter/% ≤	5	5
Ash content/% ≤	0.4	0.5
pH value	5~7	5~7

2、 Physical and chemical properties:

Water solubility: It is easily soluble in water at room temperature, and the aqueous solution is transparent. Non toxic and harmless, safe and environmentally friendly.

Chemical resistance: At room temperature, the pH value of its aqueous solution is generally around 5-7, the viscosity is stable, and it is almost not affected by weak acids, weak bases, or organic solvents (esters, ketones, higher alcohols, hydrocarbons). It has extremely high oil resistance.

Miscibility: It can be miscible with starch, synthetic resins, cellulose derivatives, and various surfactants with good stability, but long-term storage may result in delamination.

3、 Main purpose:

This product is used as an anti collapse additive in the process of oil and gas drilling, which can effectively prevent drilling fluid filtrate from invading shale, thereby achieving the effect of preventing wellbore instability or even wellbore collapse. The inhibitory and anti collapse performance of polyvinyl alcohol is long-lasting and effective, and it has been successfully applied as an oilfield additive in China.