CARBOXY-FUNCTIONAL REACTION PRODUCTS BASED ON POLYETHER AND AQUEOUS PRIMER MATERIALS, INCLUDING REACTION PRODUCTS Russian patent published in 2019 - IPC C08G63/12 C08G63/123 C08G63/668 C08J7/04 C09D167/00 C09D5/08 B32B27/06 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to a pigmented aqueous primer material, a multilayer paint system and a method for production thereof. Aqueous primer material contains a pigment, water and a polyether-based reaction product. Polyether-based reaction product is obtained by reacting (a) at least one cyclic aromatic anhydride of carboxylic acids, including a free carboxylic acid group and/or a halide of a carboxylic acid group with (b) at least one polyether of general structural formula (I)

,

in which R is C₃-C₆ alkylene radical and n are selected so that the polyether (b) has a number-average molecular weight of 800–4,000 g/mol. Molar ratio of components (a) and (b) in reaction is 0.8/2.2–1.6/1.8. Acid number of the obtained reaction product is 5–50 mg KOH/g. Water primer material can be obtained by an environmentally friendly method using specifically aqueous ground materials and is used to improve adhesion and resistance to cracking of paint systems obtained using primer material.

EFFECT: disclosed are carboxy-functional reaction products based on polyether and aqueous priming materials containing reaction products.

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