解讀环氧地坪在建築中的重要性和延伸
胺類固化劑是环氧地坪塗料的主要固化劑,這類固化劑主要有脂肪胺、脂肪胺加成物、脂环胺、脂环胺加成物、聚酰胺、聚酰胺加成物、曼尼其堿等。各種固化劑中,脂肪胺與环氧樹脂反應迅速,放熱量大,塗膜交聯密度高,抗化學府性能很好。脂肪胺加成物在刺激性、泛白、與环氧樹脂相容性等方面有較大改善,但最終塗膜的交聯結構與脂肪胺相似,玻璃化溫度高,脆性大,主要用於高抗化學品耐溶劑型塗料。
Amine curing agents are the main curing agents for epoxy floor coatings. These curing agents mainly include aliphatic amine, aliphatic amine adduct, aliphatic amine adduct, polyamide, polyamide adduct, Mannich base and so on. Among all kinds of curing agents, aliphatic amine reacts with epoxy resin rapidly, releases heat, has high crosslinking density and good chemical resistance. Aliphatic amine adducts have been greatly improved in irritation, whitening and compatibility with epoxy resins. However, the cross-linking structure of the final coating is similar to that of aliphatic amine. It has high glass transition temperature and brittleness, and is mainly used in solvent-resistant coatings with high chemical resistance. 脂环胺及其加成物的許多性能較脂肪胺及其加成物有較大提高,如色淺、流平性好、光澤高、不泛白、不需誘導期,其玻璃化溫度仍較高,主要用作無溶劑环氧地面塗料的固化劑。
Many properties of alicyclic amines and their adducts are better than those of aliphatic amines and their adducts, such as light color, good leveling, high gloss, no whitening and no induction period. Their glass transition temperature is still high, and they are mainly used as solventless curing agents for epoxy floor coatings.
聚酰胺固化劑綜合性能優良,分子內長鏈烴具有很好的內增塑作用,使塗膜柔軟、耐沖擊,酰胺鍵提供瞭更大的粘附性、潤濕性、剝離強度和對潮濕表面的容忍度。耐化學府性較其他胺固化劑下降,但仍保持很高的韌性,廣泛用作溶劑型环氧地面塗料的固化劑。
Polyamide curing agent has excellent comprehensive properties. Long chain hydrocarbons in molecule have good plasticizing effect, which makes the film soft and impact resistant. The amide bond provides greater adhesion, wettability, peeling strength and tolerance to wet surface. Chemical resistance decreases compared with other amine curing agents, but still maintains high toughness. It is widely used as curing agent for solvent-based epoxy floor coatings.
聚酰胺與环氧的混溶性不好,施工前沒有熟化仍有發白出油現象,而聚酰胺加成物與环氧樹脂相容性好,遊離胺含量低,較標準聚酰胺在不良條件下易固化而得到不變黃、無白霜的塗膜,因而目前大多數环氧地面塗料都選用聚酰胺加成物作為地面塗料固化劑。
The miscibility of polyamide and epoxy is not good, whitening and oiling still occur before construction, while polyamide adduct has good compatibility with epoxy resin, low content of free amine, which is easier to cure than standard polyamide under adverse conditions and can obtain yellow and frost-free coatings. So at present, most epoxy floor coatings use polyamide adduct as curing agent for floor coatings.
曼尼其堿又叫酚醛胺,其特點是分子中含有酚羥基,能促進固化,常用於低溫、潮濕、水下固化塗料。由於分子中苯环的剛性使塗膜脆性較大,故單獨作為环氧地坪塗料的固化劑應用不多,多用作中間層膠泥、砂漿的固化劑。
Mannich base, also known as phenolic amine, is characterized by the presence of phenolic hydroxyl groups in the molecule, which can promote curing. It is often used in low temperature, humidity and underwater curing coatings. Because the rigidity of benzene ring in molecule makes the film brittle, it is seldom used as solidifying agent of floor coating alone, and mostly used as solidifying agent of middle layer cement and mortar.
稀釋劑即能溶解樹脂的有機溶劑。主要作用是降低樹脂膠液黏度,同時也有利於把樹脂固化過程中放出的熱量傳遞出來,可適當延長膠液的使用期。稀釋劑分非活性稀釋劑和活性稀釋劑兩類。
Dilutants are organic solvents that dissolve resins. The main function is to reduce the viscosity of the resin glue, but also conducive to the heat release from the resin curing process, which can properly prolong the service life of the glue. Dilutants can be divided into two categories: inactive diluents and active diluents.
1)非活性稀釋劑本身不參與固化反應,僅達到物理混合和減低黏度的目的。一般加入量為樹脂重量的5%一15%,在樹脂固化時,會有部分逸出,從而增加樹脂的收縮率,降低粘結力、機械強度及熱變形溫度,嚴重時甚至會產生氣孔。溶劑型环氧地面塗料使用時應特別註意。
1) The inactive diluent itself does not participate in the curing reaction, only achieves the purpose of physical mixing and viscosity reduction. Generally, the amount of resin added is 5% to 15% of the weight of the resin. When the resin is cured, part of the resin will escape, which will increase the shrinkage of the resin, reduce the bonding force, mechanical strength and thermal deformation temperature, and even produce stomata in serious cases. Special attention should be paid to the use of solvent-based epoxy floor coatings.
2)活性稀釋劑的種類及使用。活性稀釋劑具有环氧基,能參與环氧樹脂的环氧固化反應,所以並無逸出之弊。
2) Types and use of active diluents. Active diluent has epoxy group and can participate in epoxy curing reaction of epoxy resin, so it has no evasive disadvantages.
對固化後樹脂無太多的影響,同時還往往起著增韌作用,在配方中增韌劑的用量可以減少或不用。但加入活性稀釋劑時固化劑應相應增加用量。
It has little effect on the cured resin, but also plays a toughening role. The amount of toughening agent in the formulation can be reduced or not used. However, when active diluent is added, the amount of curing agent should be increased accordingly.
潔凈耐磨地面塗料一次施工成膜厚度達0.8-3.0㎜,為防止非活性溶劑揮發而產生塗抹膜陷,多選用瞭活性稀釋劑,制成無(揮發)溶劑型自流平塗料,同時也符合环保綠色塗料要求,進一步改善瞭施工條件。
The film thickness of clean and wear-resistant floor coatings is 0.8-3.0 in one application. In order to prevent the film depression caused by volatilization of non-active solvents, active diluents are mostly selected to prepare solvent-free (volatile) self-leveling coatings. At the same time, it meets the requirements of environmental p彩色沥清地坪rotection green coatings and further improves the construction conditions.
稀釋劑用量過多,對性能也有一定的影響。由於稀釋劑本身是短鏈分子,碳鏈比环氧樹脂短,因而阻礙瞭鏈的形成,影響瞭成膜物的主要性能。
Excessive dosage of diluent also has a certain effect on the performance. As the diluent itself is a short chain molecule, the carbon chain is shorter than that of epoxy resin, which hinders the formation of 印花地坪the chain and affects the main properties of the film-forming material.
(4)顏、填料
(4) Pigments and fillers
环氧地坪樹脂耐磨地面塗料屬於厚漿型塗料,著色顏料的用量可比普通顏料少。另一方面,环氧地面塗料表幹時間長,使用有機顏料易產生浮色、發花等問題,且有機顏料的耐化學性能有局限性,因而大多選用無機顏料,如鉆白粉、氧化鉻綠和氧化鐵系的顏料等。
Epoxy floor resin wear-resistant floor coatings belong to thick paste coatings, the amount of coloring pigments can be less than ordinary pigments. On the other hand, the surface drying time of epoxy floor coatings is long, the use of organic pigments is easy to produce float, blossom and other problems, and the chemical resistance of organic pigments has limitations, so most of the inorganic pigments are used, such as drill white powder, chromium oxide green and iron oxide pigments.