A Self-Matting Waterborne Polyurethane Coating for PVC Artificial Leather

Abstract

A type of polyester-based self-matting waterborne polyurethane (ESMWPU) with an excellent matte effect of 0.8° and transmittance of 78.5% for PVC artificial leather was synthesized. The influence of synthesis parameters, including R value, crosslinking and hydrophilic group content, on coating gloss and transmittance was investigated. Meanwhile, the properties necessary for applying water-based resins to plasticized PVC were detailed. The results demonstrated that R value, crosslinking degree and hydrophilic group content synergistically decided the morphological changes of latex particles during their film-forming process in three aspects: particle stiffness, three-dimensional structure and particle size, respectively. With optimized parameters of R = 1.9, TMP = 2 wt% and DMPA = 1.75 wt%, ESMWPU latex particles stabilized their spherical shapes without collapsing in the film-forming process and created a rough surface, resulting in a matte effect. In terms of application performance, good wetting and adhesion for ESMWPU to a plasticized PVC surface was achieved with a 2 wt% leveling agent load. Moreover, due to the high cohesion energy of ester bonds and intermolecular hydrogen bonds, this type of polyester-based ESMWPU also depicted admirable thermal adhesion resistance. All aforementioned results distinctly demonstrate a feasible yet promising paradigm for applying ESMWPU on PVC artificial leather.

Driving sustainability in the automotive industry: bio-coated materials and modern strategies

“…Artificial coated fabrics, also referred to as artificial/synthetic leather in the market, are a composite material that consists of a textile with an application of a polymer in the form of a paste, plastisol, or emulsion. Their structure generally consists of the surface effect layer, surface layer, intermediate layer, and adhesive layer [22]. Although different types are currently present in the market, the most common polymers used are polyurethane (PU), polyvinyl chloride (PVC), or polypropylene (PP) [21].…”

Sustainable Textiles from Unconventional Biomaterials—Cactus Based

“…Additionally, Noani ® incorporates fibers from eucalyptus leaves [35,36]. Materials such as polyurethane foam (PUR) or textile reinforcements such as woven or non-woven textiles are commonly used in some leather alternatives [37].…”

Synthesis and application of flame retardant self‐matting aqueous polyurethane dispersion

“…17 The internal crosslinking method involves the introduction of crosslinking monomers such as trimethylolpropane (TMP) to increase the degree of crosslinking of the polymer and increase the emulsion particle size, thus reducing the gloss of the paint film. 18 The phase separation method takes advantage of the tendency of uneven shrinkage during the drying of the two phases, which leads to a rough surface of the paint film and manifests as low gloss. 19 Different strategies for preparing matte polyurethane coatings by chemical methods are still mainly to increase the particle size of emulsions and prepare emulsions with large particle size and wide particle size distribution, thus improving the roughness of the paint film and achieving a self-matte finish.…”

“…Chemical methods include internal cross‐linking, phase separation, and hydrophilic expansion methods 17 . The internal crosslinking method involves the introduction of crosslinking monomers such as trimethylolpropane (TMP) to increase the degree of crosslinking of the polymer and increase the emulsion particle size, thus reducing the gloss of the paint film 18 . The phase separation method takes advantage of the tendency of uneven shrinkage during the drying of the two phases, which leads to a rough surface of the paint film and manifests as low gloss 19 .…”