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Bayhydur® quix for wood coatings
Can a 2K water-borne wood coating dry as fast as a 2K solvent-borne one? For wood coating manufacturers this is a crucial question. After all, although water naturally dries more slowly than solvents, stricter environmental regulations mean water-borne products with their lower VOC emissions are increasingly the coating of choice.
Covestro has now solved this dilemma by developing Bayhydur® quix, a 2K water-borne polyurethane-based product that dries up to 60% faster than existing products. While performing as quickly as a 2K solvent-borne competitor, Bayhydur® quix also offers a comparable cost per m2. As a result, wood coating manufacturers can formulate systems with VOC emissions of less than 100 g/l but without compromising on performance, price and productivity.
Desmodur® ultra for Flex Pack
The challenge in the food packaging industry is to keep up with the frequently changing and increasingly strict safety standards – particularly with regard to substance migration and workplace hygiene. At Covestro our aim is to maximize food safety and workplace hygiene for lamination adhesive manufacturers using solvent-borne and solvent-free adhesives.
The solution we developed is Desmodur® ultra N, an aliphatic crosslinker that enables formulation of best-in-class lamination adhesives with regard to food safety and workplace hygiene. The proof of performance comes from the aliphatic nature of this crosslinker (i.e. it inherently cannot form polymeric aromatic amines) and its monomeric content of <0.1% (i.e. below the forecast regulation limit).
Dispercoll® U 64 for foam bonding
Water-borne polychloroprene dispersions (CRDs) are the main technology used in gluing mattresses as a result of their great suitability for wet-in-wet bonding combined with high initial bond strength. Yet foam-bonding adhesive manufacturers using CRDs face the challenge of their tight availability. Alternatives such as hot-melts do not match the outstanding performance of CRDs and need expensive machinery. Besides, there is a clear market trend, driven by eco-labels such as Nordic Swan, to develop adhesives with no halogen organic components.
Newly developed Dispercoll® U 64 from Covestro is a readily available drop-in solution that matches the performance of CRDs and has no halogen organic compounds. With its outstanding wet-bonding properties and open time, this polyurethane dispersion also slips easily into existing application processes, e.g. 2K spray coagulation.
Dispercoll® U 66 for 3D Lamination
Thermally laminated adhesives are needed to attach 3D furniture fronts to kitchen and bathroom fittings. Water-borne polyurethane (PUD) adhesives are the dominant technology for high heat-resistant 3D lamination thanks to their fast build-up of bond strength and reliable bonding in automated production processes. However, there is still scope for improving the durability of thermo-lamination adhesives in highly demanding kitchen and bathroom environments where high temperatures and humidity are common. The challenge Covestro tackled was to improve durability.
The drop-in solution Covestro developed, Dispercoll® U 66, delivers a better climatic resistance performance in stressful high temperature and humidity conditions. Over a period of eight weeks, a reactive 1K adhesive based on Dispercoll® U 66 displayed significantly higher bond strength values than standard reactive 1K adhesives under highly demanding climatic conditions. A furniture front manufacturer tested the adhesive on an industrial production line and confirmed it is a drop-in solution.
Bayhydur® eco for wood coatings
The furniture industry has been a front-runner in the implementation of water-borne solutions as an alternative to traditional solvent-borne solutions. But up to now, water-borne wood coatings have not performed so well in demanding environments such as kitchens or bathrooms. This inferior durability is a definite drawback. Covestro took up the challenge of developing a hardener that would improve the performance of a bio-based wood coating while increasing its bio content.
Bayhydur® eco is a 61% bio-based hardener and delivers the same performance as a petro-based 2K waterborne alternative. It has a significantly lower cradle-to-gate carbon footprint (e.g. approx. 30% less CO2 emissions than a petro-based cross-linker), has a low reformulation requirement (i.e. almost a drop-in solution), and displays excellent chemical resistance, high compatibility and easy mixing in water. This enhanced performance from a bio-based hardener is good news for eco-conscious manufacturers of wood coatings.
|OP 08 - Bayhydur® eco|
|C 18 - ICA|
|C 05 - Sirca / RiFRA|
|SF 13 – Wood Coatings|
Covestro contributes to the UN SDGs through our product portfolio and ambitious sustainability targets. Learn more by clicking on the UN SDG icons.