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VINNAPAS® EN 428

VINNAPAS® EN 428 is a self-crosslinking, plasticizer-free, aqueous polymer dispersion based on vinyl acetate and ethylene monomers. It offers a unique combination of softness, high wet strength, and versatile formulation options. The film formed by VINNAPAS® EN 428 has a soft texture, making it an excellent choice as a binder for personal hygiene nonwovens. Additionally, it can be used as a coating and finishing agent for woven and knitted textiles, providing enhanced properties and performance.

Brand: VINNAPAS (218 products)

Functions: Binder, Binder & Resin, Crosslinking Agent

Chemical Family: Acetates, Vinyls, Vinylics & Vinyl Derivatives

Compatible Substrates & Surfaces: Paper

Features: Self Crosslinking, Self-crosslinking

Technical Data Sheet

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Features & Benefits

Labeling Claims
CASE Ingredients Features
Industrial Additives Features

Applications & Uses

Markets
Applications
Compatible Substrates & Surfaces
Industrial Additives End Use
Applications
  • Tabletop Nonwovens
  • Textile Printing
  • Wash & Abrasion Resistance
Application Details

Processing

Polymer Dispersions

  • VINNAPAS® EN 428 is miscible with most anionic and/or nonionic aqueous polymer dispersions especially with the selfcrosslinking VINNAPAS® AN 214. This imparts a harder handle and increases the film strength. However, the compatibility of the mixture should be tested by carrying out storage tests.
  • VINNAPAS® EN 428 can be used in permanently water-repellent coatings based on Wacker® Si Finish CT 19E to impart handle to textile materials used for rain and sportswear, tents and camping goods etc. It is usually also possible to combine VINNAPAS® EN 428 (CGN) with curable or fiber crosslinking synthetic resin precondensates and/or other reactive resins.
  • The pH value of VINNAPAS® EN 428 is usually sufficient for optimum crosslinking, but in exceptional cases the addition of 0.1–1.0 % diammonium phosphate can accelerate the process. VINNAPAS® EN 428 crosslinks at temperatures above 130 °C, but 150 °C is necessary for optimum durability.

Fillers and Pigments

If, for coating applications, VINNAPAS® EN 428 is to be pigmented, only pH-value neutral fillers and pigments should be used since they would otherwise interfere with the crosslinking process which takes place in the acid pH range.

Defoaming Agents

Suitable defoaming agents are, for example:

  • SILFOAM® SE1662
  • FOAMASTER® WO 2310
  • AGITAN® 352

Their efficacy and compatibility in the formulation chosen should always be checked.

  1. SILFOAM® is a trademark of Wacker Chemie AG
  2. FOAMASTER® is a trademark of BASF SE
  3. AGITAN® is a trademark of Münzing Chemie GmbH

Thickening Agents

Thickeners should be pH-value neutral products e.g. cellulose derivatives, polyvinyl alcohol or polyurethane based. VINNAPAS® EN 428 crosslinks under acidic conditions so that if an alkali thickenable acrylic acid copolymer is to be employed, the pH-value should be adjusted with ammonia. Their compatibility and efficacy need to be checked.

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Density (at 23°C)approx. 1.04 g/cm³DIN EN ISO 2811-3
Elongation (at break)approx. 1500 %DIN EN ISO 527, part 1 - 3
Glass Transition Temperatureapprox. -15 °CSpecific method
Minimum Film Forming Temperatureapprox. 0 °CDIN ISO 2115
Predominant Particle Sizeapprox. (0.2 - 0.3)µmSpecific method
Protective Colloid (Emulsifier System)Non-ionic emulsifiers--
Surface of the Dispersion FilmSlightly sticky--
Tensile Strength (Cross Linked)approx. 4.5 N/mm²DIN EN ISO 527, part 1 - 3
Specifications
ValueUnitsTest Method / Conditions
Dynamic Viscosity (at 23°C)50 - 350 mPa·sDIN EN ISO 2555
pH4 - 6-DIN/ISO 976
Solids Content51 - 53 %DIN EN ISO 3251
Properties
  • VINNAPAS EN 428 offers a unique balance of soft handle, hight wet strength and broad formulation flexibility.
  • Due to the particular soft character of the film it forms VINNAPAS® EN 428 is ideally suited as a binder for personal hygiene nonwovens and as a coating and finishing agent for woven and knitted goods.

Regulatory & Compliance

Packaging & Availability

Storage & Handling

Shelf Life
6 Months
Storage Information
  • When the dispersion is stored in tanks, proper storage conditions must be maintained. The product has a shelf life of 6 months starting from the date of receipt if stored in the original, unopened containers at temperatures between 5 and 30 °C.
  • Iron or galvanized iron containers and equipment are not recommended. Corrosion could result in discoloration of the dispersion or blends made from it in further processing. We therefore recommend the use of containers and equipment made of ceramic, rubberized or enameled materials, appropriately finished stainless steel, or plastic (rigid PVC, polyethylene or polyester resin). As polymer dispersions may tend to superficial film formation, skins or lumps may be formed during storage or transportation. A filtration process is thus recommended prior to utilization of the product.

Preservation for Transport, Storage and further Processing

  • The product is adequately preserved during transportation and storage if kept in the original, unopened containers. However, if it is transferred to storage tanks, the dispersion should be protected against microbial attack by adding a suitable preservative package.
  • Measures should also be taken to ensure cleanliness of the tanks and pipes. In unstirred tanks, a layer of preservativecontaining water should be sprayed onto the surface of the dispersion to prevent the formation of unwanted skin and possible attack by microorganisms. The thickness of this water layer should be < 5 mm for low viscosity dispersions and up to 10–20 mm for high viscosity products. Proper procedures – periodic tank cleaning and sanitization – must be set up in order to prevent microbial attack. Contact your biocide representative/supplier for further plant hygiene recommendations. Measures should be taken to ensure that only clean air enters the tank when the dispersion is removed.
  • Finished products manufactured from polymer dispersions usually also require preservation. The type and scope of preservation will depend on the raw materials used and the anticipated sources of contamination. The compatibility with other components and the efficacy of the preservative should always be tested in the respective formulation.
  • Preservative manufacturers will be able to advise you about the type and dosage of preservative required.