POLYMER AND PROCESS

摘要

There is disclosed a polymerisable composition comprising (a) from about 1% to about 95% by weight of the total composition of at least one polymer precursor for an alkyd, polyester, acrylic and/or epoxy polymer where the polymer precursor comprises a strong acid group in an amount from about 0.01% to about 10% by weight of the polymer precursor; (b) from about 1% to about 95% by weight of the total composition of (i) from about 50% to about 95% by weight of component (b) a monomeric melamine and/or derivative thereof optionally comprising less than 0.5% by weight of free amino groups; and (ii) from about 5% to about 50% by weight of component (b) an oligomeric melamine and/or derivative thereof (optionally formed by reacting melamine and/or a derivative thereof with formaldehyde and/or derivative thereof) where the oligomer comprises less than 0.5% by weight of free amino groups. The compositions are useful for providing melamine formaldehyde aqueous coatings which can be cured at low temperatures.