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我们用二甲苯-甲醛树脂与顺丁烯二酸反应,以二甲苯-甲醛树脂代替通常生产不饱和聚酯树脂所用的丙二醇和苯酐,制成一个新型不饱和聚酯(牌号2608)。该树脂可用苯乙烯作交联剂,以过氧化苯甲酰-二甲基苯胺或过氧化环已酮-环烷酸钴系统游离基引发共聚,可在室温条件下固化,接触成型以制造玻璃钢制品。也可用邻苯二甲酸二丙烯酯作交联剂,提高其耐热性。该树脂粘度较低,对无机填料及玻璃纤维的浸润性好,制品固化放热量较低,收缩性小。该树脂受潮后性能好,具有良好的高频绝缘性能,可用作热带绝缘材料及高频绝缘材料。利用传统的不饱和聚酯树脂的成型方法,可制成玻璃钢,制品具有良好的机械性能和优良的耐酸耐碱性能,是一种良好的化工防腐蚀材料和工程结构材料。
We used xylene-formaldehyde resin to react with maleic acid to substitute xylene-formaldehyde resin for propylene glycol and phthalic anhydride, which are commonly used in the production of unsaturated polyester resins, to form a new type of unsaturated polyester (Grade 2608). The resin can be used as a cross-linking agent of styrene, benzoyl-dimethylaniline or percyclohexanone - naphthenate cobalt system free radical initiated copolymerization, curing at room temperature, contact molding to make glass fiber reinforced plastic Products. Dipropyl phthalate can also be used as a crosslinking agent to improve its heat resistance. The resin has a low viscosity, good wettability to inorganic fillers and glass fibers, low curing exotherm, and low shrinkage. The resin after damp performance, with good high-frequency insulation properties, can be used as tropical insulation materials and high-frequency insulation materials. The use of traditional unsaturated polyester resin molding method can be made of glass fiber reinforced plastic, the product has good mechanical properties and excellent acid and alkali resistance, is a good chemical anti-corrosion materials and engineering structural materials.