Relying on the long-term technology accumulation of polyurethane, Wanhua chemical took the lead in developing waterborne polyurethane dispersion for waterproof coating. Since then, Wanhua chemical has two series of products, waterborne polyurethane dispersion and waterborne acrylic emulsion, providing unlimited possibilities for water-borne waterproof coating.
What are the waterborne polyurethane dispersions for waterproofing coatings, which are different from those of acrylic emulsion?
And listen to the in-depth analysis of Wanhua chemical technicians.
From the source analysis, the main differences of resin in monomer and reaction mode are compared:
The polymerization mode and functional groups of the resin bring different performance characteristics. The water-based polyurethane dispersion gives the water-based waterproof coating more excellent water absorption, mechanical properties at ordinary low temperature and lower VOC.
Mechanical properties at normal and low temperature
Different monomers and polymerization methods lead to the formation of polymers with different groups. Polyurethane dispersion and acrylic emulsion showed their respective mechanical properties.
Water absorption
Due to the different polarity of the resin group, different emulsification processes are adopted to give different water absorption of the coating:
The water-based polyurethane waterproof coating has lower water absorption, which makes the waterproof coating not easy to deform and permeate after long-term contact with water.
VOC
Effect of different polymerization methods on VOC:
Attachment: VOC test method: GB18582-2008
To sum up, the excellent performance of polyurethane dispersion makes the waterproof coating prepared by this method have both high strength and high flexibility, lower water absorption and less VOC, making the waterproof coating more environmental friendly and healthy.
Under the combined influence of structure, reaction mode and emulsification technology, polyurethane dispersion and acrylic emulsion have different resin properties. In different application fields, these two kinds of products have their own advantages. According to the actual needs, appropriate products are adopted. Welcome to continue to pay attention to Wanhua chemical related technical articles or contact Wanhua chemical professionals at any time.
Wanhua chemical surface materials business department
It is mainly engaged in the R & D, production and sales of environmental friendly surface materials & new energy materials. Relying on the advantages of polyurethane and acrylate raw materials in the upstream of the company, it extends the industrial chain, and plans to build a green and environmental sustainable development business with an output value of 10 billion. It has formed water-based polyurethane (PUD), water-based acrylic acid (PA), modified polyurethane (PUA), water-based UV curing (UV), water-based two-component (2k), water-based epoxy (EP), rheological additives (HEUR and hase), and soft bioderived beads Beads, sap, RO, NF, HF, AR, Li-ion battery cathode materials and corresponding technical services.
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