Лако-красочные материалы — производство

The original development of non-isocyanate acrylics was targeted in the early 1980’s at the vehicle refinishing market. The products were developed to be direct alternatives to the isocyanate cured acrylics and polyesters used in this market, due to the inherent toxicity problems of the isocyanate crosslinker. However, the slower cure and lower resistance characteristics of the non-isocyanate products restricted their development in this field and wholesale replacement of two packs by non-isocyanates has not taken place. Nevertheless the anhydride/hydroxyl and amine/epoxy systems have developed well in the captive VR markets in North America and Western Europe, respectively.

The development of non-isocyanate acrylics in the heavy duty, transport & ACE market segments has been at the expense of medium oil and modified alkyds. Here the use of non-isocyanate acrylics has offered the end users improvements in gloss, durability, colour retention, speed of dry and handleability. The acrylic displays a superior initial appearance and long term retention of appearance which offsets the higher initial costs by increasing assembly speed, reducing maintenance and increasing resale value, especially in the ACE sector.

The market development of these products has had to depend on specific performance improvements offered by each of the technologies. For example, the very fast dry and high durability of the carboxy/epoxy and amine/epoxy technologies have been successfully developed in the transport, ACE, machinery enamel and heavy duty areas.

The fast cure, high gloss, low shrinkage and high durability of coatings based on the anhydride/hydroxyl technology has been successfully developed in the automotive sector.

Ketimine technology has been utilised in two pack primer systems, with very fast dry, cure and high anti-corrosion characteristics. However, development in topcoats has been hindered by its tendency to yellow.

The Michael chemistry, although sensitive to acid media, displays exceptional resistance characteristics when fully cured and has been utilised in applications which require extremely high chemical resistance, such as external coatings for chemical tankers.