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宝钢高耐侯聚酯HDP

返回列表 来源: 发布日期: 2020.05.07

宝钢高耐侯聚酯HDP

针对PE和SMP的缺点,英国hydro公司(现由BASF购买)和瑞典Becker公司于2000年初开发了一种60-80%耐候HDP浸渍涂料,可实现PVDF涂层,优于普通硅改性聚酯涂层,室外耐候性15年。在高耐候性高分子树脂的合成中,采用具有环己烷结构的单体,使树脂的柔韧性、耐候性和成本达到平衡;采用不含芳香族的多元醇和聚酸,降低树脂对紫外光的吸收,从而达到高耐候性涂层。为了提高涂膜的耐候性,在涂膜配方中加入紫外线吸收剂和HALS}。高耐候聚酯线圈涂料已得到国外市场的认可,且涂料的性价比非常突出。
宝钢硅改性聚酯(SMP)
由于含活性基团Oh/-COOH的聚合物极易与其他聚合物反应,为了提高PE的耐光性和粉化性,改性反应采用保色性和耐热性优异的有机硅树脂,与P的改性率可在5%~50%之间。SMP为钢板提供了更好的耐久性,其耐腐蚀期可达10-12年,当然其价格高于PE,但由于硅树脂对材料的附着力和加工成形性不理想,SMP彩涂钢板不适用于需要多次成型加工的场合,大多用于建筑物的星顶和外墙。
宝钢聚偏氟乙烯
由于PVDF的化学键和化学键之间具有很强的键能,涂层具有很好的耐腐蚀性和保色性。在建筑用彩涂钢板涂料中,它是分子量大、粘结结构直的最先进产品。因此,除了耐化学性外,机械性能、电缆电阻和耐热性也很特殊。一般情况下,防腐期可长达20-25年。近年来,以乙烯基三氟氯乙烯和乙烯基酯单体共聚的含氟树脂在我国得到了广泛的应用,广泛应用于建筑外墙和金属板中。由于乙烯基酯单体和易水解氟的含量较PVDF低(约30%),其耐候性与PVDF有一定的差距。宝钢氟碳涂料PVDF含量不低于70%(其它均为丙酸树脂)。

For the shortcomings of PE and SMP, British hydro company (now purchased by BASF) and Swedish Becker developed a 60-80% weather resistant HDP dip coating that can achieve PVDF coating in the early 2000, and it is superior to ordinary silicon modified polyester coating, with outdoor weather resistance of 15 years. In the synthesis of high weather resistant polymer resin, the monomer with cyclohexane structure is used to achieve the balance of flexibility, weather resistance and cost of the resin, and the polyol and polyacid without aromatic group are used to reduce the absorption of UV light by the resin, so as to achieve the high weather resistance of the coating. UV absorbers and HALS} were added to the coating formulation to improve the weatherability of the film. High weather resistant polyester coil coating has been recognized by the market abroad, and the cost performance of the coating is very outstanding.

Baosteel silicon modified polyester (SMP)
Because polydips containing active group Oh / - COOH are very easy to react with other polymers, in order to improve the sunlight resistance and pulverization of PE, the silicone resin with excellent color retention and heat resistance is used as the modification reaction, and the modification ratio with P can be between 5% and 50%. SMP provides better durability of steel plate, and its corrosion resistance period can be up to 10-12 years, of course, its price is higher than PE, However, due to the unsatisfactory adhesion and processing formability of silicon resin to materials, SMP color coated steel plate is not suitable for occasions requiring multiple molding and processing, most of which are used for star top and outer wall of buildings.
PVF (polyvinylidene fluoride) of Baosteel
Due to the strong bond energy between the chemical bond and chemical bond of PVDF, the coating has very good corrosion resistance and color retention. In the color coated steel plate coating for construction industry, it is the most advanced product with large molecular weight and straight bond structure. Therefore, in addition to chemical resistance, mechanical properties, cable resistance and heat resistance are also very special. In general, the anti-corrosion period can be as long as 20-25 years. In recent years, fluorine-containing resin copolymerized with vinyl trifluorochloroethylene and vinyl ester monomers has become popular in China, which has been widely used in exterior walls and metal plates of buildings. Because the content of vinyl ester monomers and fluorine which are easy to hydrolyze is lower (about 30%) than PVDF, there is a certain gap between its weatherability and PVDF. The PVDF content of the fluorocarbon coating produced by Baosteel is not less than 70% (others are propionic acid resin).

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