The types and properties of thickeners for emulsion paint coatings are described

Original: The types and properties of thickeners for latex paint coatings are expounded

Latex coatings with water as a solvent are mixtures of polymer water dispersions and pigments and filler water dispersions, because the viscosity of polymers and pigments and filler water dispersions is close to water, and this state cannot be constructed

Application scenarios of thickeners for latex coatings

There are four main types of thickeners for adhesive coatings: natural minerals such as attapulgite, bentonite, montmorillonite (this type of thickener is rarely used at present); Cellulose is mainly hydroxyethyl (hydroxypropyl) cellulose; Acrylic-base swelling and modified acrylic-base swelling are mainly emulsion-like polymers formed by the polymerization of (methyl) acrylic acid, (methyl) acrylates and corresponding functional monomers; The polyurethane binding type is mainly prepared based on the end groups of low molecular weight polyethylene glycol and diisocyanate - NCO or - OH polypolymers, respectively, with hydrophobic alcohols (amines) or long carbon chain monoisocyanates

Basic properties of thickeners

Thickening mechanism of thickeners

Cellulose:

Cellulose thickeners are mainly used to increase the low and medium shear viscosity of latex coatings, with large thixotropy and large

Acrylic-base swelling class:

Such polymers generally carry a large number of carboxyl groups, enter the water to meet the alkali neutralization, form polymer salts, from granular to three-dimensional rod with many branched structures, and because of the intersection to form a network structure

Polyurethane association type:

Such compounds are polymers with both hydrophilic and lipophilic groups

Source of the article: The article is from "China Federal Thickener", please indicate the source when

Responsible Editor: