柳州施美樂地坪分析環氧地坪漆的粘度關系
環氧地坪產品的粘度較高,存在誘導期,與環氧樹脂相容性不佳,固化物的熱變形穩定較低,附著力,強度及韌性較好,主要用于高固體分涂料,密封劑、膠黏劑、電纜連接劑,酯環族胺即環狀脂肪族酯環族胺粘度低。
固化物色淺,光澤好,保色性好,與聚酰胺比較,耐化學性好,油漆不泛白,不需要誘導期,但韌性差,固化活性較低,需要加溫后才能固化,只有在加入促進劑后或進行改性的條件下才能室溫固化,防腐漆芳香胺主要有間苯二胺扥這類固化劑除了簡苯二甲胺具有部分脂肪族結構特點而為液體外,其他在室溫下均為固體,因此與樹脂混合不便,一般需要加熱才能固化,主要用于加熱固化的工藝,氟碳漆也可用做改性胺固中山和興搬家公司汕頭清洗空調188134-18628化劑的原料。
一般來說,單一多胺分子量小,揮發性強,毒性大,與環氧樹脂反應后交聯密度大,固化物脆性大,不耐沖擊,一般單一多胺特別是脂肪族單一分子量小,揮發性強,毒性大,與環氧樹脂反應交聯密度 大,環氧地坪漆固化是涂料嚴重發白,減少量未反應的多胺會吸收空氣中的水汽,使涂層表面發汗,上述缺點使得單一多胺作為環氧地坪樹脂的固化劑,限制了其在地平涂料中的應用為了克服胺類固化劑的脆性,有機硅耐高溫漆不良的耐沖擊性,欠佳的耐候性及毒害作用,必須對胺類固化劑進行進一步改性,以便獲得無毒或低毒。
可在溫室條件下固化的胺類固化劑,環氧富鋅底漆反應中一般按過量,生成的加成物分子質量大,沸點和劑、粘度升高,對皮膚和黏膜的刺激性大幅度減少,由于加成物的固化反應一般固化反應比較快,醇酸油漆其固化產物的力學性能耐化學品性較原來的多胺稍差。聚酰胺是由一個脂肪多胺與脂肪酸二聚物縮合而成,醇酸調和漆用于環氧地坪涂料的聚酰胺固化劑主要是那些分子量和年度都是較高的品種,聚氨酯漆聚酰胺固化劑綜合能力優良,氨鍵使其對各種集基體有非常好的附著力非常大的抗剝離強度及良好的潤濕性聚氨酯固化過程通過酰胺反應。
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.dxddd.net/dtl8/dtl8-4.htm |