Bayer MaterialScience LLC Pioneers Use of Waterborne PUDs and Blocked Polyisocyanates in Coatings for Glass Containers

Lombard, IL, October 19, 2010 --(PR.com)-- Glass represents a challenging substrate for the coatings chemist. Fortunately, new developments from Bayer MaterialScience LLC are making waterborne polyurethane dispersions (PUDs) and blocked polyisocyanates an attractive option for coating the exterior of glass bottles and jars.

Raymond Stewart, senior R&D scientist, Coatings, Adhesives and Specialties, Bayer MaterialScience LLC, will present “Waterborne Organic Coatings for Glass” at the Coatings Trends & Technologies 2010 Technical Conference, held October 5-6 in Lombard, Ill. Stewart’s presentation took place at 10:45 a.m. on Wednesday, Oct. 6.

“Polyurethane dispersions and blocked polyisocyanate systems offer a unique value proposition, and based on Bayer MaterialScience’s expertise in polyurethane chemistry, we saw the opportunity to offer these technologies as a solution to market needs,” explained Stewart.

According to Stewart, glass bottles and jars are gaining popularity for a number of reasons, including their sustainability (100 percent recyclable) and the cachet associated with their use in cosmetics and perfumes, for example.

Using a polyurethane dispersion/blocked polyisocyanate system for glass coatings offers improvements in the following areas:

Abrasion resistance
Scratch & mar resistance
Chip resistance
Grip
Impact strength
Lubricity control
Ultraviolet (UV) stability

These one-component systems also provide design freedom, meaning the glass containers can be transparent or pigmented, with a high gloss, matte or frosted look.

By varying the chemistry, it is possible to fine-tune the one-component system to achieve the properties best suited to a particular application, according to Stewart. He explains: “These raw materials offer advantages across the value chain – for bottle designers, manufacturers and decorators. Bayer MaterialScience wants to spread the word that waterborne, one-component coating systems are a low-VOC solution that offers an excellent combination of durability and flexibility for this demanding market.”

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