Сополимер стирола с винилпирролидоном

Description

Styrene-vinylpyrrolidone copolymer is a graft emulsion copolymer in which hydrophobic styrene units are combined with hydrophilic N-vinyl-2-pyrrolidone units. The commercial form of Antara 430 (formerly Polectron 430) is a white thermoplastic latex with a dry matter content of 38-41%, obtained as a graft emulsion copolymer of 30% polyvinylpyrrolidone and 70% styrene. The emulsion is stable, moderate viscosity, high resistance to acids and salts. The films that the polymer forms are durable, light-resistant and water-resistant.

Identification

• CAS No.: 25086-29-7 (the list of synonyms also includes 12673-67-5, 37311-06-1, 131495-42-6, 1310324-45-8, 2351150-25-7)
• Chemical formula: (C8H8,C6H9NO)x
• Molecular weight: 645.87 (conventional value for a polymer); exact mass: 215.131
• EU number: 206-216-3
• RTECS number: UY5771200
• Class: polymers
• Brand names: Antara 430, Antara 450, Polectron 430, Polectron 450, Porapak R

Physico-chemical properties

• Density: 1.04 g/ml at 25 °C (literature data)
• PSA specifications: 20.31
• XLogP3: 3.0198
• Commercial form of latex: aqueous emulsion, dry matter content 38–41%, particle size about 0.5 microns
• The ratio of units in grade 430: 70% styrene, 30% polyvinylpyrrolidone

The given “molecular weight” of 645.87 and “exact mass” of 215.131 are calculated values ​​for a repeating fragment and do not describe the real molecular weight of the polymer chain: for copolymers it is specified by a distribution, not a single number.

Properties of latex and films

• stable emulsion of moderate viscosity
• high tolerance to acids and salts - the composition does not coagulate when introducing electrolytes and acidic components
• films are durable, light-resistant, with high water resistance
• the combination of two types of links ensures adhesion to both polar and non-polar substrates

Scope of application

• Cosmetics and personal care: film former and opacifying agent. Antara 430 is used as a highly effective opaque agent - it gives compositions an opaque pearlescent white appearance without the use of separate pigments. It works as a film former in hair styling products and decorative cosmetics.
• Adhesives, coatings and film materials: the copolymer improves mechanical properties and resistance to chemical influences and heat.
• Gas chromatography: under the designation Porapak R, a porous polymer sorbent based on this copolymer is produced - an attachment for separating polar compounds.
• Laboratory reagent: supplied as a 38% aqueous emulsion with a particle size of approximately 0.5 microns.

Safety Information

• Safety instructions: 24/25 - avoid contact with skin and eyes
• WGK Germany: 2
• Transport codes: NONH for all types of transport (not included in the list of dangerous goods)
• RTECS number: UY5771200

Hazard statements and GHS classifications for this product are not provided in the original data sheet. Polymers of this type are not generally classified as hazardous, but aqueous dispersions may contain residual monomer, emulsifiers and preservatives, and these will determine the actual requirements of a particular brand's safety data sheet.

Storage and handling

Latex is a water dispersion, and the main requirements are related to this. Freezing is unacceptable: when water crystallizes, the emulsion irreversibly coagulates. Keep the container tightly closed to avoid drying of the crust on the surface and microbial contamination. The room is at a positive temperature, without direct sunlight. The contents are mixed before use. Protective equipment: gloves and safety glasses, avoid contact with skin and eyes. Do not discharge rinsing water with latex residues into the sewer system: hazard class for the aquatic environment according to the German scale - 2.