PVP/VA vs VP/VA ?

Making a supplier change for our hair styling products. 

What is the difference between PVP/VA and VP/VA copolymer? Both 73w version. 

Thanks!

Comments

  • Bill_TogeBill_Toge Member, Professional Chemist
    there's no difference - they're two different terms for the same material
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • Thanks @Bill_Toge ;

    Would there be a noticeable difference between: 

    K value 1% in ethanol: 24-32

    K Value 1% in water: 30-38

    If so, what would the difference be?

  • Bill_TogeBill_Toge Member, Professional Chemist
    edited November 2021
    the K-value is proportional to the viscosity, which is higher in water than it is in alcohol, because water forms much stronger bonds with its solvates than alcohol does, so comparing the two values is not meaningful
    the best way to compare the two directly is to make up the finished product with each material and determine whether there's any difference
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
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