Architectural Sustainability and Efficiency of Enhanced Waterproof Coating from Utilization of Waterborne Poly (Siloxane-Imide-Urethane) Copolymers on Roof Surfaces

Abstract

According to Taiwan’s Ministry of the Interior, from 2017 to 2019, more than 12% of house-purchase disputes were due to water leakage caused by frequent tropical rains, which have long troubled engineers. The thermal stability resistance, water resistance, and ultraviolet resistance of existing polyurethane formulations have been limited by environmental aging. Thus, the lifespan of commercial PU-coated resins (typical PU) for the waterproofing of roof surfaces is merely two to three years. Accordingly, this study proposed the introduction of siloxane and imide groups to produce waterborne poly(urethane-siloxane-imide) (Si-imide-WPU) copolymers to improve the resistance of environmental aging in typical PU. The waterproof coating resin made of Si-imide-WPU copolymers was environmentally friendly, safe to use, and free of organic solvents. The results showed that the optimal Si-imide-WPU-2 sample in the study made improvements on the defects of polyurethane (PU) including its thermal properties, mechanical properties, environmental resistance, and lifespan which could be extended up to 5.4 years. Consequently, the studied Si-imide-WPU copolymers could reduce material waste while enhancing the sustainability and efficiency of the architecture.

Addressing the sustainability challenges for polymers in liquid formulations

“…For example, mesoporous silica polydopamine composites derived from mussel proteins have been shown to improve the release of pesticide–fertiliser combinations 16 and a waterborne siloxane modified polyurethane led to enhanced durability and almost doubled lifespan for paints and coatings. 17 P&G have developed an alternative to the PLF carboxymethyl cellulose (CMC) called blocky carboxymethyl cellulose (BCMC) which makes fabric and dirt particle surfaces more negatively charged, so it is better able to repel soil particles from textiles once adsorbed onto cotton fabrics and soil particles, ultimately meaning less can be used in the laundry products.…”

Development of reflective cooling plasticized polyvinyl chloride/precipitated barium sulfate composites for building roof applications throughout entire solar wavebands

“…PU exhibits remarkable weather resistance, mechanical properties, and processability. Nevertheless, its performance deteriorates significantly due to the effects of ultraviolet light aging 21 . While these materials excel in waterproofness and weather resistance, they lack reflective cooling and insulation capabilities.…”

Study on Properties of Regenerated Fluorinated Polyurethane Rigid Foam Prepared by Degrading Waste Polyurethane

“…Moreover, more and more states explicitly prohibit its burial or incineration, and it is difficult to recycle, resulting in a waste of living space and chemical resources [1,4,[10][11][12][13][14]. Therefore, how to deal with the degradation and reuse of waste PU in a green and efficient manner is crucial to determine [15][16][17][18]. The recycling prospect of waste polyurethane is very broad and has great potential research value and significance.…”