Problem 58 - Chemistry in Context

Question

You may have admired the beauty of hardwood floors. Polyurethane is the finish of choice for floors because it is more durable than varnishes and shellacs. Until recently, polyurethane was always an oil-based paint. But recently, the Bayer Corporation developed a water-based polyurethane that reduces the amount of VOCs by 50-90\%. In 2000, Bayer was awarded a Presidential Green Chemistry Challenge award for this development. Prepare a summary of this work. Also check stores to see if any water-based polyurethanes are available in your area.

Step-by-Step Solution

Answer

Bayer developed a water-based polyurethane to reduce VOCs by 50-90% and received a Green Chemistry award. Check local stores for availability.

Step 1: Introduction to Polyurethane

Polyurethane is a popular finish for hardwood floors due to its durability. It is often preferred over other finishes like varnishes and shellacs for this reason.

Step 2: Traditional Polyurethane Composition

Historically, polyurethane has been an oil-based paint. This composition provides a strong and durable finish but contributes significantly to the emission of volatile organic compounds (VOCs).

Step 3: Development of Water-Based Polyurethane

The Bayer Corporation developed a new form of water-based polyurethane. This innovation significantly reduces VOC emissions by 50-90%, making it an environmentally friendly alternative to traditional oil-based polyurethane.

Step 4: Recognition and Impact

In recognition of their environmentally beneficial innovation, Bayer was awarded the Presidential Green Chemistry Challenge award in 2000.

Step 5: Local Availability Check

To assess local availability, check with stores in your area to see if they stock the new water-based polyurethane products, reflecting their potential market presence and adoption.

Key Concepts

Understanding Polyurethane

Polyurethane is a type of synthetic material that is often used as a finish for hardwood floors. Its popularity is due to its impressive durability. Compared to other finishes, such as varnishes and shellacs, polyurethane stands out for offering a tougher and longer-lasting protective layer.
This resilient characteristic makes it a preferred choice in both residential and commercial settings.
Oil-based polyurethane traditionally dominated the market. It provided a robust finish that could withstand the wear and tear of daily use. However, its wide use brought about concerns due to the high levels of volatile organic compounds (VOCs) it emitted. This led to the development of more environmentally friendly options.

Volatile Organic Compounds (VOCs) and Their Impact

Volatile Organic Compounds, or VOCs, are chemicals that easily evaporate into the air, contributing to air pollution and posing health risks. Common in many household products, VOCs are known for their role in the formation of ground-level ozone, which can harm the lungs and is associated with respiratory illnesses.
These compounds have been a significant concern in the use of oil-based products like traditional polyurethane. As the binders in these finishes dry, VOCs are released, raising concerns over air quality and exposure to harmful chemicals inside homes and buildings. By reducing the VOC content in products, the negative impact on both indoor and outdoor environments can be minimized.
Water-based polyurethanes are part of this effort, substantially lowering the emission of VOCs by using water as the primary solvent instead of oil.

The Presidential Green Chemistry Challenge

The Presidential Green Chemistry Challenge is a prestigious award given to innovations that incorporate green chemistry principles, aiming to protect human health and the environment. The award recognizes groundbreaking advancements that reduce or eliminate hazardous chemicals in the design, manufacture, and use of chemical products.
The Bayer Corporation received this accolade in 2000 for their development of a water-based polyurethane, as it marked a significant step towards reducing VOC emissions. This innovation exemplified how businesses could harmonize industrial needs with environmental protection.
By achieving a reduction in VOCs by 50-90%, Bayer's water-based polyurethane not only improved air quality but also showcased the potential for sustainable development in the chemical industry. This achievement set a standard for future innovations, encouraging companies to pursue eco-friendly solutions in product development.