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Liquid Rubber from Kuraray is ideal for demanding surface materials, e.g. in the automotive industry or shipbuilding (Source: Kuraray)

05. March 2019

Materials for premium surfaces and efficient coating processes

ECS 2019
Kuraray Hall 1 Stand 454

Kuraray announced that it will present its Mowital, Poval and Liquid Rubber (K-LR) brands, including a new heat-resistant PVB material and two new high-molecular polyvinyl alcohols, at the European Coatings Show (ECS) 2019 from 19 – 21 March 2019 in Nuremberg, Germany.

According to Kuraray, inks, paints and coatings have to meet ever growing requirements. Sectors such as the printing, packaging, automotive or mechanical engineering industries need powerful color systems and surface materials that protect their components, products and packaging and lend them a permanently brilliant color and luster. For modern coating processes, paints also have to offer good flow properties. And when it comes to printing food packaging, color systems must not pose any health risks. Kuraray said it offers materials suitable for a wide range of applications that enable ideal surface structures and efficient production processes. The company will present its wide range of materials for inks, paints, adhesives and coatings at the ECS 2019, including:

  • Liquid Rubber, the highly viscous synthetic rubber based on isoprene, butadiene and styrene, making paints and coatings permanently elastic – even at low temperatures,
  • Mowital, a wide range of PVB materials for versatile applications – including the new heat-resistant BA 55 HH with a unique rheology and viscosity,
  • Poval, a PVA resin with outstanding technical and chemical properties – including two new highly molecular polyvinyl alcohols that give inks and paints superior flow characteristics.

The highly viscous synthetic rubbers from the Liquid Rubber (K-LR) series are colorless, transparent and nearly odorless, plus they have a very low VOC content. As a reactive plasticizer, the rubber materials lend coatings and seals permanent elasticity – even at low temperatures thanks to their low glass transition temperature (Tg). Available as liquid isoprene rubber (LIR) and liquid butadiene rubber (LBR), Liquid Rubber is also perfect for high-performance surface materials and sealants for the automotive and construction industries, as well as shipbuilding, said Kuraray. Liquid Rubber features a substantially higher molecular weight than other comparable plasticizers – for non-residue processing and optimal quality. The synthetic rubbers are co-vulcanizable and reduce migration significantly, helping to retain their physical properties permanently. Another benefit: With Liquid Rubber, processing times can be shortened considerably. Additional applications include tires, belts, tubing and other rubber products and adhesives.

Binder for special requirements: heat-resistant and crystal-clear

Liquid Rubber ensures tires have the best grip and a longer service life (Source: Kuraray)

Liquid Rubber ensures tires have the best grip and a longer service life (Source: Kuraray)

According to the company, Mowital polyvinyl butyrals offer very good optical transparency – crystal-clear, similar to glass. Its high binding power makes Mowital an ideal binder for printing inks, paints and coatings. The PVB materials offer very good elasticity and are compatible with many polymers and solvents. With good adhesion and film formation properties, Mowital is ideal for thermoplastic applications. At the same time, it poses no health risks, meaning it can be used for food packaging. At the 2019 European Coatings Show, Kuraray will present a new polyvinyl acetal from its Mowital range. BA 55 HH features a unique rheology, which gives coatings and paints very smooth flow properties. In addition, the material is especially heat-resistant, making it ideal for use in stoving enamels and heat-sealable lacquers as well as thermoplastic glues.

Poval polyvinyl alcohol (PVA) resins are characterized by unique physical and chemical characteristics – including outstanding film formation and barrier properties. Thanks to their good binding power, they are ideal as a binder for inks, paints and coatings. The PVA materials can be flexibly combined with a wide range of reaction partners, are water-soluble as well as biodegradable, pose no health risks and can even be recycled. At the ECS 2019, Kuraray will present two new highly molecular polyvinyl alcohols featuring a much higher viscosity than similar materials that give paints and inks superior flow properties. Used as a post-additive, KP 200-88 KX SB achieves a good shear-thinning behavior with optimal elasticity. KP 105-88 KX SB is an excellent protective colloid for highly viscous polyvinyl acetate (PVAc) dispersions. During polymerization, it cross-links very well with PVAc and ensures higher viscosity while requiring less materials than comparable substances. At the same time, KP 105-88 KX SB improves water resistance, said the company.

On Tuesday, 19 March 2019, Dr. Samuel Michel, TS&D Poval at Kuraray, will discuss the advantages that KP 200-88 KX SB and KP 105-88 KX SB can offer vinyl acetate emulsion applications at the ECS Conference starting at 11:30 a.m. in the Seoul room, Nuremberg trade fair grounds.


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