Resin dispersion, coating material, laminate, and processes for their production

A resin dispersion having, dispersed in water with a 50% particle diameter of at most 0.5 μm, a polymer (C) having a hydrophilic polymer (B) bonded to a propylene/α-olefin copolymer (A) as a copolymer of propylene with an α-olefin other than propylene, wherein the hydrophilic polymer (B) is a polyether resin having an amino group as a reactive group, wherein:

• the copolymer (A) has a propylene content of at least 50 mol % and less than 100 mol % and the copolymer (A) has a weight average molecular weight Mw of at least 10,000 and a molecular weight distribution Mw/Mn of at most 3.5 and a heat of crystal fusion ΔH of at most 60 J/g and at least 10 J/g;
• the resin dispersion has a surfactant content of at most 15 parts by weight per 100 parts by weight of the polymer (C),
• an amount of the hydrophilic polymer (B) bonded to the copolymer (A) is from 0.01 to 0.3 mmol/g per 1 g of the copolymer (A),
• the copolymer (A) elutes at least 95% at a temperature of at most 60° C. in temperature rising elution fractionation,
• the copolymer (A) elutes at most 20% at a temperature of at most 30° C. in temperature rising elution fractionation, and
• the copolymer (A) is produced by means of a single-site catalyst.