Coating formulation: production process and formulation design of low temperature curing epoxy floor coating

Core tip: Introduction The floor coating prepared by epoxy resin and organic amine curing agent, whether solvent-free or solvent-free, has the problems of difficult curing or no construction in winter or alternate seasons In addition to acid and alkali resistance, chemical resistance, rigidity, excellent elasticity and wear resistance, EP Pu curing system coating can be cured normally at - 5 ℃, normal construction and relatively low cost of raw materials In this paper, the characteristics of its formula design and process preparation are introduced as follows 1 Selection of raw materials One point one Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: introduction the floor coatings prepared with epoxy resin and organic amine curing agent, whether solvent-free or solvent-free, are difficult to be cured or unable to be constructed in severe winter or alternate seasons In addition to acid and alkali resistance, chemical resistance, rigidity, excellent elasticity and wear resistance, EP Pu curing system coating can be cured normally at - 5 ℃, normal construction and relatively low cost of raw materials In this paper, the characteristics of its formula design and process preparation are introduced as follows 1 Selection of raw materials 1 Selection of film-forming materials and curing agents After many experiments and screening, the epoxy resin 601 with medium molecular weight of bisphenol A was selected as the film-forming material There was enough hydroxyl density on the molecular chain segment for cross-linking reaction, but also reflected certain elasticity and high bonding strength And its price and consumption of curing agent quantity is moderate Sm601-75 epoxy resin of "Sanmu" company is selected in the formula TDI Trimer and TDI-TMP adduct are selected as PU curing agent After comprehensive analysis of experimental effect and cost, the TDI-TMP adduct of Sanmu company is finally selected: 775 × Pu curing agent is used together with it, which almost reacts in the same amount, simplifying the formula design 1.2 the selection of pigments and fillers in the formula of intermediate paint and finish paint adopts Muscovite powder, barite powder, quartz powder, anatase titanium dioxide, coloring pigment, organic bentonite (anti settling agent) 1.3 the leveling agent selected by BYK company: byk320; byk354; byk306; defoamer: byk066; byk530a; bykl41 Zinc naphthenate and tin dibutyl dilaurate were used as wetting and dispersing agents to improve the surface condition of the film 1.4 solvent selection conditions: xylene is selected for the resin with high solubility, low dosage and low toxicity; cyclohexanone is suitable for the resin curing speed, which is also beneficial to increase the sand content of the medium paint The process is a low solvent high solid epoxy coating Sm601-75 of "Sanmu company" is selected as film-forming material; 775 × Pu curing agent is matched with it, the equivalent ratio is based on 1:1, primer n (- OH): n (- NCO = 1:0.8 ~ 1; intermediate coating n (- OH): n (- NCO = 1:1 ~ 1.15 or higher, finish n (- OH): n (- NCO = 1:1 ~ 1.05 The general principle is that the base coat, the middle coat should reflect the characteristics of rigidity, and the top coat should have certain elasticity Byk306 is selected as leveling agent; antifoaming agent: byk141 and byk530a can be used in combination, or one can be used alone Dibutyl tin dilaurate and zinc naphthenate are used as curing accelerators Zinc naphthenate is also a wetting and dispersing agent for pigments and fillers, and can regulate the surface drying speed of the film See Table 1 for specific formula Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,