中山永旺地坪分析环氧地坪漆的粘度关系
环氧地坪产品的粘度较高，存在诱导期，与环氧树脂相容性不佳，固化物的热变形稳定较低，附着力，强度及韧性较好，主要用于高固体分涂料，密封剂、胶黏剂、电缆连接剂，酯环族胺即环状脂肪族酯环族胺粘度低。 
固化物色浅，光泽好，保色性好，与聚酰胺比较，耐化学性好，油漆不泛白，不需要诱导期，但韧性差，固化活性较低，需要加温后才能固化，只有在加入促进剂后或进行改性的条件下才能室温固化，防腐漆芳香胺主要有间苯二胺扥这类固化剂除了简苯二甲胺具有部分脂肪族结构特点而为液体外，其他在室温下均为固体，因此与树脂混合不便，一般需要加热才能固化，主要用于加热固化的工艺，氟碳漆也可用做改性胺固中山和兴搬家公司汕头清洗空调188134-18628化剂的原料。
一般来说，单一多胺分子量小，挥发性强，毒性大，与环氧树脂反应后交联密度大，固化物脆性大，不耐冲击，一般单一多胺特别是脂肪族单一分子量小，挥发性强，毒性大，与环氧树脂反应交联密度 大，环氧地坪漆固化是涂料严重发白，减少量未反应的多胺会吸收空气中的水汽，使涂层表面发汗，上述缺点使得单一多胺作为环氧地坪树脂的固化剂，限制了其在地平涂料中的应用为了克服胺类固化剂的脆性，有机硅耐高温漆不良的耐冲击性，欠佳的耐候性及毒害作用，必须对胺类固化剂进行进一步改性，以便获得无毒或低毒。
可在温室条件下固化的胺类固化剂，环氧富锌底漆反应中一般按过量，生成的加成物分子质量大，沸点和剂、粘度升高，对皮肤和黏膜的刺激性大幅度减少，由于加成物的固化反应一般固化反应比较快，醇酸油漆其固化产物的力学性能耐化学品性较原来的多胺稍差。聚酰胺是由一个脂肪多胺与脂肪酸二聚物缩合而成，醇酸调和漆用于环氧地坪涂料的聚酰胺固化剂主要是那些分子量和年度都是较高的品种，聚氨酯漆聚酰胺固化剂综合能力优良，氨键使其对各种集基体有非常好的附着力非常大的抗剥离强度及良好的润湿性聚氨酯固化过程通过酰胺反应。
Products of high viscosity, induction period, poor compatibility with epoxy resin, curing of low thermal deformation stability, adhesion, good strength and toughness, it is mainly used for high solid coatings, sealants, cable connection agent, adhesives, ester ring amines cyclic aliphatic esters namely ring amines low viscosity.
Looking for curing light, good gloss, good colour retention, compared with polyamide, good chemical resistance, the paint is not white, don't need induction period, but toughness poor, curing activity is low, need heating ability after curing, only after adding accelerator or modified under the condition of room temperature curing, anti-corrosive paint aromatic amines with m-phenylene diamine 扥 this kind of curing agent in addition to Jane benzene dimethylamine with partial aliphatic structure characteristics for liquid, the other are solid at room temperature, so the inconvenience, mixed with resin to be heated to cure commonly, used mainly for heating curing process, painting also can be used as the raw material of modified amine curing agent.
In general, a single polyamine small molecular weight, volatile, toxicity, crosslink density is big, after reaction with epoxy resin curing brittleness, impact resistance, not general single polyamine especially aliphatic single molecular weight is small, volatile, toxicity, and the reaction of epoxy resin crosslinking density is big, floor paint curing coatings is serious white, reduce the amount of unreacted polyamine can absorb moisture in the air, the coating surface of the sweat, the more weaknesses make single amine as curing agent of epoxy resin, limits its application in the horizon of coating in order to overcome the brittleness amine curing agent, organic silicon high-temperature paint adverse impact resistance, weather resistance and poor toxic, must carry on the further modification of amine curing agent, in order to get the non-toxic or low toxicity.
Under the condition of the greenhouse curing amine curing agent of epoxy zinc rich primer in general by the excessive reaction, generate adduct molecular mass is big, the boiling point and the agent, viscosity increases, the skin and mucous membrane irritation are greatly reduced, as a result of the adduct curing general curing reaction is faster, alkyd paint the mechanical properties of cured product chemical character from the original polyamine is a bit poor. Polyamide is written by a fat dimer fatty acid and polyamine condensation, alkyd mixed paint used for floor coating polyamide curing agent higher molecular weight and annual are mainly the varieties, polyamide curing agent for polyurethane paint good comprehensive ability and ammonia key makes it has very good adhesion to various set of substrate is very large stripping strength and good wettability by amide reaction of polyurethane curing process.
http://www.36co.com/36co/dtl8-4.htm |
