一种水性丙烯酸改性醇酸钢结构涂料的制备及探讨

Preparation and Discussion of a Waterborne Acrylic Modified Alkyd Steel Structure Coatings

以水性丙烯酸改性醇酸树脂混拼水性丙烯酸乳胶为成膜物质,通过筛选颜填料、防锈料及其添加比例,制备出水性丙烯酸改性醇酸钢结构涂料。结果表明,该涂料具有优异的初期耐雨水、耐盐水性,可通过168 h涂膜无起泡、脱落现象;硬度建立快,自干1 d可达2B,自干7 d可达HB;防锈效果好,常温养护7 d,耐盐雾性可达到72 h,烘烤后亦可达到120 h以上;附着力优异,可达1~0级,抗冲击亦可通过50 kg·cm涂膜无裂纹;且涂料成本低,满足市场需求。

Waterborne acrylic modified alkyd steel structure coatings were prepared by using waterborne acrylic modified alkyd resin mixed with waterborne acrylic latex as the film-forming material,through screening pigments,fillers,antirust materials and their addition ratios.The results show that the coatings have excellent initial resistance to rain and salt water and can last 168 hours without any blistering or peeling of the coatings.The hardness increases fast,and it can reach 2B after 1 day of self-drying and HB after 7 days of self-drying.The rust prevention effect is good.After curing at room temperature for 7 days,salt spray resistance can last for 72 hours,and can also reach more than 120 hours after baking.The excellent adhesion is up to level 1~0,the impact resistance can also reach 50 kg·cm without film cracks.The coatings’cost is low,meeting market demand.