TAGS: Polyurethane Coatings Sustainability / Natural Coatings
This is a sponsored article by Cargill.
Metal corrosion is an issue that leaves an impact on the economy, environment, health, and safety.
There are many rust mitigation methods that have been implemented throughout the years. This usually involves isolating the metal surface from its surroundings to prevent or at least slow down corrosion.
Polyurethanes (PUs), along with epoxy resins, are frequently used in the creation of these protective coatings. The highly diverse and rich chemistry of this class of materials is one of their advantages since it offers a platform for the optimization of coating qualities.
Some of the favorable properties that the Priplast™ polyol offer to the polyurethane include:
- Durability: High resistance to wear and tear. It is ideal for coatings that need to withstand harsh conditions.
- Flexibility: Good flexibility. Adapts to the movements of the substrate it is applied to. It is ideal for coatings on objects that undergo stress and movement.
- Chemical Resistance: Good resistance to many chemicals.
- Appearance: Can be formulated to provide a high-gloss finish.
- Versatility: Can be formulated in many ways. It is suitable for a wide range of coating applications, from hard and durable to soft and flexible.
- Water Resistance: Good resistance to water. It is ideal for humid environments.
Traditionally, polyurethanes have been manufactured from a combination of polyisocyanates and petroleum-based polyols. There is a strong and continuing demand for PU as it’s use is not just limited to the coatings industry. This inevitably prompts questions about the sustainability of the manufacturing process and fuels interest in developing polyurethane formulations with improved environmental impacts.
This article will introduce Cargill’s Priplast™ bio-based polyol designed to address the increased interest in innovative solutions for the industry.
Issues with Conventional PU Production Methods
Public concerns about climate change and limitation to fossil resources have increased the interest in bio-based raw materials. Cargill has been active in oleo chemistry for many years, using natural oils as feedstock for various chemicals. Besides the renewable nature of these products, the emphasis is on the unique properties and specific quality benefits they bring.
The implementation of bio-based PUs has been approached in a variety of ways. This includes but is not limited to, renewability of the starting ingredients, impacts of the synthesis itself, formulations devoid of isocyanates, and lower VOC (Volatile Organic Compound) emissions by restricting the use of organic solvents. For this article, we will focus on the renewability of the starting ingredients.
The market has been moving toward bio-based polyols generated from renewable resources for more than ten years. This is a result of an effort to increase the sustainability of the polyurethane sector. The most significant factor in raising the renewable content of PU lies in the use of bio-based polyols. The demand for bio-based polyols has increased quickly as a result. This presents new prospects for the
polyurethane industry to valorize biomass through the production of technical-grade polyols.
Introducing Cargill’s Priplast™ Polyols – Key Features and Applications
Cargill has introduced
Priplast™ polyester polyols that are 100% bio-based*. This is to fulfill the rising market need for high-performance, 100% renewable building blocks for coatings and adhesives. Priplast™ benefits include:
- Durability: combining thermos oxidative and hydrolyses for a longer product lifetime
- Allows for exposure to humid and high temperature conditions
- Good adhesion, good wetting properties and excellent adhesion to dissimilar substrates
- Excellent moisture repellency and sealant and protective properties
- Flexible nature allows for elastic and low temperature properties
What is Cargill’s Priplast™?
Cargill's Priplast™ is a line of polyester polyols that incorporates dimer technology. This results in a flexible resin that is ideal for various applications requiring low-temperature performance, stress resistance, and durability. Its hydrocarbon composition also enhances water repellency and protection against hydrolysis.
Cargill has developed two 100% bio-based* polyols with the tradenames
Priplast™ 3238 and
Priplast™ 3294: High-performing polyurethane formulations. These grades offer the standard advantages of polyurethane adhesives and support sustainable product innovation while fulfilling the performance needs of clients.
Priplast™ has excellent
adhesion capabilities on a variety of substrates. These capabilities enable furthermore the ability to adhere to dissimilar substrates.
It can be utilized in several applications, including:
- Industrial and protective coatings
- Automotive coatings
What is Priplast™ 3238 Polyester Polyol?
Priplast™ 3238 polyester polyol is a versatile
bio-based amorphous polyester polyol. This liquid building block offers hydrophobicity, a favorable color, and enhanced durability. Its strong adhesion to various substrates (including low-polarity plastics), good wetting properties, and crack-resistant nature make it a valuable addition to any application.
These polyols are ISCC PLUS certified and manufactured from vegetable oil sources with a molecular weight of 2,000 and 100% renewable carbon content. Some of its most important properties are:
- Extreme hydrophobicity for optimal sealant and protective properties
- Can produce low-color applications
- No strain hardening
- Strong adhesion to a wide range of substrates
- Improved durability due to its resistance to hydrolysis, thermo-oxidation, and UV
Priplast™ 3238 is an ideal solution for a range of industries, including adhesives and sealants, automotive coatings, elastomers, engineering plastics, and industrial coatings.
What is Priplast™ 3294 Polyester Polyol?
Priplast™ 3294 polyester polyol is a bio-based polyol. It boasts top-notch performance in water resistance, surface hardness, and mechanical properties for PU coatings, adhesives, PU dispersions, and elastomers. This
semi-crystalline polyester polyol has a molecular weight of 2,000, ISCC PLUS certification.
The product offers outstanding features including:
- Long-lasting durability
- Resistance to high temperatures and humidity
- Strong adhesion and wetting capabilities
- Excellent moisture repellency
- Flexible nature for elastic and low-temperature applications
- 100% bio-based*
Priplast™ 3294 polyols is a versatile solution, well-suited for various applications, such as adhesives and sealants, as well as industrial coatings.
Promoting Sustainability with Priplast™ Polyester Polyols
Polyurethane is a very versatile polymer that proves to be very valuable in the coating industry, especially to
mitigate rust on metal surfaces. However, conventional polyurethane production methods are derived from petroleum-based polyols. The rise of environmental awareness has led to the need for bio-based polyols for the synthesis of polyurethane.
Cargill's Priplast™ is a 100% bio-based* polyester polyol that provides a solution to address the demand to improve the sustainability footprint of polyurethane products. While at the same time also maintains favorable properties such as durability,
flexibility,
chemical resistance, and water resistance.
Disclaimer: * bio-based/renewable carbon content according to ASTM D6866 and EN 16640.
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