PVP K 85
PVP K 85
PVP K 85 = Polyvinylpyrrolidone K 85
PVP K 85 Solution is a hygroscopic, amorphous polymer supplied as a clear aqueous solution.
PVP K 85 can be plasticized with water and most common organic plasticizers.
Polyvinylpyrrolidone K 85 is considered to be physiologically inert.
PVP K 85 is cross-linkable to a water insoluble, swellable material either in the course of vinylpyrrolidone polymerization, by addition of an appropriate multifunctional comonomer or by post-reaction, typically through hydrogen abstraction chemistry.
PVP products are recommended for dishwashing, fabric care, household cleaning, and industrial and institutional cleaning applications.
PVP K 85 is in form of aqueous solution.
PVP K 85 is linear, random and is produced by the free-radical polymerization.
Polyvinylpyrrolidone K 85 is hygroscopic and amorphous.
PVP K 85 has high polarity, dispersany, adhesion and cohesion.
PVP K 85 forms hard, glossy and oxygen permeable film.
PVP K 85 is soluble in water and polar solvents.
Polyvinylpyrrolidone K 85 is insoluble in esters, ethers, ketones and hydrocarbons.
PVP K 85 is suitable for digital ink-jet printing.
Polyvinylpyrrolidone is a hygroscopic, amorphous polymer supplied as a white, free-flowing powder or a clear aqueous solution.
Available in several molecular weight grades, they are characterized by K-value, and used in a great variety of applications.
Polyvinylpyrrolidone can be plasticized with water and most common organic plasticizers.
Polyvinylpyrrolidone (PVP K 85) resins are linear, random copolymers produced by the free-radical polymerization of the monomers in ratios varying from 70/85 to 85/70 vinyl acetate to vinylpyrrolidone.
PVP K 85 copolymers are available as white powders or clear solutions in ethanol, isopropanol and water.
Polymers in the four ranges of vinylpyrrolidone content (85, 50, 60 and 70 percent), are produced in ethanol or isopropanol.
The PVP K 85 copolymers with 60 and 70 percent vinylpyrrolidone content are available as solids or as 50 percent aqueous solutions.
What is PVP K 85 Copolymer?
PVP K 85 Copolymer is the ingredient found in most mainstream hair care products that provides the hold factor.
So PVP K 85 is very common in most Hairsprays but also found in gel’s, wax’s, pomades and styling creams.
PVP K 85 is a synthetic ingredient that is derived from petroleum.
PVP (also known as Polyvinylpyrrolidone) was the main ingredient in the first really successful hairsprays in the early 1950s.
This polymer worked as a hairspray because it was soluble in water.
This meant PVP K 85 could be rinsed out when you wash your hair.
PVP tended to absorb water out of the air, giving hair that tacky look that was so common in the sixties.
This was fixed with the help of another polymer, a silicone called polydimethylsiloxane.
To understand how this silicone made a better hairspray, it helps to understand how the hairspray works in the first place.
When you spray PVP K 85 on, the polyvinylpyrrolidone forms a thin coating on the hair.
PVP K 85 is stiff and keeps the hair from moving around.
Uses of PVP K 85:
-Polyvinylpyrrolidone K 85 is used in as an adhesive in glue stick and hot-melt adhesives
-PVP K 85 is used in as a special additive for batteries, ceramics, fiberglass, inks, and inkjet paper, and in the chemical-mechanical planarization process
-Polyvinylpyrrolidone K 85 is used in as an emulsifier and disintegrant for solution polymerization
-PVP K 85 is used in increase resolution in photoresists for cathode ray tubes (CRT)
-PVP K 85 is used in aqueous metal quenching for production of membranes, such as dialysis and water purification filters
-Polyvinylpyrrolidone K 85 is used in as a binder and complexation agent in agricultural applications such as crop protection, seed treatment and coating
-PVP K 85 is used in as a thickening agent in tooth whitening gels
-PVP K 85 is used in as an aid for increasing the solubility of drugs in liquid and semi-liquid dosage forms (syrups, soft gelatine capsules) and as an inhibitor of recrystallisation
-Polyvinylpyrrolidone K 85 is used in as an additive to Doro’s RNA extraction buffer[citation needed]
-PVP K 85 is used in as a liquid-phase dispersion enhancing agent in DOSY NMR
-PVP K 85 is used in as a surfactant, reducing agent, shape controlling agent and dispersant in nanoparticle synthesis and their self-assembly
-Polyvinylpyrrolidone K 85 is used in as a stabilizing agent in all inorganic solar cells
Properties of PVP K 85:
PVP K 85 is soluble in water and other polar solvents.
For example, PVP K 85 is soluble in various alcohols, such as methanol and ethanol, as well as in more exotic solvents like the deep eutectic solvent formed by choline chloride and urea (Relin).
When dry PVP K 85 is a light flaky hygroscopic powder, readily absorbing up to 40% of its weight in atmospheric water.
In solution, PVP K 85 has excellent wetting properties and readily forms films.
This makes PVP K 85 good as a coating or an additive to coatings.
A 2014 study found fluorescent properties of PVP K 85 and its oxidized hydrolyzate.
History of PVP K 85
PVP K 85 was first synthesized by Walter Reppe and a patent was filed in 1939 for one of the derivatives of acetylene chemistry.
PVP K 85 was initially used as a blood plasma substitute and later in a wide variety of applications in medicine, pharmacy, cosmetics and industrial production.
PVP K 85 is considered to be physiologically inert:
-Applications take advantage of one or more properties inherent in the polymer, typically due to the lactam ring.
-High polarity and the resultant propensity to form complexes with hydrogen donors, such as phenols and carboxylic acids, as well as anionic dyes and inorganic salts.
-Dispersancy, where components in a mixture are uniformly distributed through the use of polyvinylpyrrolidone.
-Hydrophilicity, where the substantial water solubility of polyvinylpyrrolidone is its dominant feature and frequently a factor along with other properties valuable to numerous applications.
-Adhesion, taking advantage of the higher molecular weight polyvinylpyrrolidones formulating in aqueous media, then evaporating sufficient water to generate a solid product for the desired application.
-Cohesivity, where cohesive strength is achieved through a variety of dry blending and granulation techniques.
Polyvinylpyrrolidone is cross-linkable to a water insoluble, swellable material either in the course of vinylpyrrolidone polymerization, by addition of an appropriate multifunctional comonomer or by post-reaction, typically through hydrogen abstraction chemistry.
Physical and chemical properties of PVP K 85:
Commonly used PVP level in the cosmetic industry is K-30.
Commercialized PVP is white and free flowing powder or solids with its content in the mass fraction of 20%, 30%, 45% and 50% aqueous solution.
PVP is soluble in water and is hygroscopic with a moisture equilibrium being 1/3 of the relative humidity of the environment.
Similar as the protein hydration action, each monomer associates with 0.5mol water.