废聚酯在聚酰胺热熔粘合剂合成中的应用

以010树脂为主要原料,在实验室合成的聚酰胺热熔胶的基础上,用废聚酯代替部分原料,合成出具有极好柔韧性,较高粘度和软化点的新型聚酰胺热熔粘合剂。通过考察废聚酯的加入量和其它的合成条件的影响,找到合成的最佳配比及条件。所得聚酞酰热熔粘合剂产品在性能上能够与进口产品相媲美。由于采用废聚酯为部分原料,为解决白色污染开辟了一个新的途径。     

低分子聚酰胺热熔粘合剂的性能调节

为了适应不同聚酰胺热熔粘合剂用户的不同要求 ,避免改变合成条件带来的操作不便 ,探索了一条以本实验室合成的低分子聚酰胺热熔粘合剂为基本原料 ,用少量调节剂在局部范围内调节粘合剂性能的操作路线。从而进一步提高了产品的适应性     

铝塑复合管用热熔胶的进展

介绍了铝塑复合管用热熔胶的粘接原理、类型、制备方法、性能及国内外的主要产品 ,并对国内目前使用的热熔胶存在的问题及未来发展趋势作了评述     

PES热熔胶浆的研制

由PES热熔胶粉配成的热熔胶浆 ,且有良好的工艺特性 ,透用于粘合衬布的生产     

聚酰胺热熔胶的热氧化降解和稳定化研究现状

概述了近年新开发的聚酰胺热熔胶的特性、分类，以及在聚酰胺热熔胶中普遍存在的易发生热氧化降解的问题，对聚酰胺热熔胶的热氧化降解机理和聚酰胺的端基对其稳定性的影响最新研究成果做了综述，讨论和比较了几类常用的稳定剂及其最佳配方。     

湿固化聚氨酯热熔胶的合成与表征

以多异氰酸醋PAPI和自制多元醇为原料,采用熔融缩聚法合成出了一种具有快速粘接定位功能的新型反应性热熔胶,并利用FTIR、DSC和力学性能测试等手段对产品进行了表征。结果表明,合成产品不仅具有合理的结构特征,而且还具有良好的使用性能和耐热性能。     

L型热熔胶的研制

研制的SG010-C和SG010-X型催化剂对H2敏感性好,可用于乙烯均(共)聚制备L型热熔胶。在聚合过程中,通过改变催化剂的结构和氢调,控制聚合物的熔体指数(MI)、相对分子质量分布、颗粒度和熔点等,可一步法生产出热熔胶粉末且不必进行粉碎分级。     

尼龙66/1010/1212热熔胶的研制

采用尼龙66/1010/1212共聚工艺,从配方上改进了单体残留问题,同时,根据单体含量-熔点曲线,探索了尼龙66/1010/1212的熔点与配比关系的实验方法。     

Biodegradable hot melt adhesive based on partially saponified polyvinyl acetate/cellulose diacetate blend

Recycling the polymer material from the waste has a great advantage in reducing the cost of the biodegradable hot melt adhesive and solving environmental problems. Cellulose diacetate obtained from the acid hydrolysis of discarded cellulose triacetate-based cinematographic films was blended with low molecular weight partially saponified polyvinyl acetate. The degree of substitution of cellulose diacetate and the degree of saponification of partially saponified polyvinyl acetate to obtain the binary blends having excellent compatibility were determined by FTIR and DSC. TGA showed that these blends have sufficient thermal stability for hot melt adhesive applications. The viscoelastic properties of the blends were evaluated by DMA and melt viscosity. The shear strength and the biodegradability of the final hot melt adhesive were examined according to the amount of cellulose diacetate in the blends. The results indicate that adding 20% of cellulose diacetate can reduce the cost of partially saponified polyvinyl acetate -based hot melt adhesive while improving the adhesive strength.     

服装用聚酰胺热熔胶的后加工

具体介绍了服装粘合衬布用聚酰胺热熔胶的后加工,后加工处理可以使热熔胶获得适宜的粉体性能,是使热熔胶具备必需的应用性能的重要加工程序。     

粘合衬用热熔胶全细粉的制备及性能研究

采用“溶涨”粉化法对聚酰胺热熔胶进行制粉 ,通过优化粉化条件 ,制得细粉 (通过 2 0 0目 )达 90 %以上。同深冷粉碎法相比 ,细粉收率高 ,胶粉的应用性能与其相当     

聚酯型HMA胶膜AS 615的性能研究

自制AS 615是一种新开发的特种聚酯型HMA(热熔胶)胶膜,具有良好的综合性能;以此作为电子产品塑料外壳/金属部件的胶粘剂,并对其应用性能进行了系统研究。结果表明:AS 615对ABS(丙烯腈-丁二烯-苯乙烯共聚物)、PC(聚碳酸酯)等极性塑料和金属具有良好的粘接性能,相应胶接件稳定后的剥离强度超过65 N/25 mm,其最佳粘接复合温度范围为120～160℃;AS 615具有良好的耐水性、耐老化性和粘接持久性,可取代国外同类产品用于电子行业中极性聚合物与金属之间的粘接。     

Lower purity dimer acid based polyamides used as hot melt adhesives: synthesis and properties

Hot melt polyamides exhibit high adhesive strength. The polyamides synthesized from dimer fatty acids and diamines can present low crystallinity and a broad range of melting temperatures. In this work, polyamides with different compositions of dimer fatty acids, piperazine, ethylenediamine, sebacic acid and stearic acid and different content of secondary diamine (piperazine) and primary diamine (ethylenediamine) were synthesized. Polyamides with higher purity of dimer acids showed greater molecular weight, adhesion performance and a better mechanical resistance evaluated in stress/strain test. Softening point increased with increase in monomers content. By differential scanning calorimetry analysis, it was observed that polyamides with low percentage of monomer content show only one narrow melting peak in 100 °C. The increase in the acids monomer content leads to a larger temperature range of melting peak. The use of dimer fatty acid with a low content of monomers (up to 6%) in the polyamides synthesis promotes the formation of hot melt adhesives with good adhesion performances. The lowest monomer content leads to an increase in molecular weight, viscosity and mechanical properties of polyamide. Increase in the content of primary amines in polyamides increases crystallinity, viscosity and mechanical properties due to the higher number of hydrogen bonds formed by amide groups.     

Reactive hot melt polyurethane adhesives modified with pentaerythritol diacrylate: synthesis and properties

Pentaerythritol diacrylate (PEDA) was synthesized by direct esterification from acrylic acid and pentaerythritol, and the reactive hot melt polyurethane adhesives (PURs) with high green strength were prepared from Poly(1,6-hexamethyleneadipate), PHA-3000, two kinds of Poly(propylene glycol) (PPG-1000 and PPG-4000) and PEDA as well as terpene-phenolic resin. Five samples of PURs with different weight percent (α) of PEDA (α = 0, 3, 5, 7, and 10 wt%), were obtained. The rheological properties, thermal stability, and mechanical properties of the samples were investigated. The results showed that the melt viscosity (η) and the storage shear modulus of the samples increase with the increase in α, while the thermal stability changes little. The bonding strength of the samples after 10 min, 30 min, and 48 h was assessed by 180° peel tests of Fabric 6535/adhesives/Fabric 6535 stacks. The results showed that the green strength after 30 min increases with the increase in α when α is not higher than 7 wt%.     

石油树脂及其在热熔胶中的应用

本及概述了石油树脂的国内外发展状况，以及石油树脂的种类、特性和生产方法。并将石油树脂在热熔胶粘剂领域中应用作了介绍。     

聚酯热熔胶改性研究进展

介绍了近年来聚酯热熔胶的流动性、结晶速度、耐水解性、热稳定性、阻燃性、透明性等方面研究进展,环保型和功能型聚酯热熔胶将是未来发展的主要方向。     

MRP管道镀锌钢带与热熔胶之间粘接性能研究

钢带增强聚乙烯螺旋波纹管(MRP)中钢带与热熔胶之间的粘接对管道质量有很大的影响。本文主要从原材料选择、制样工艺条件和钢带表面处理3个方面对热熔胶与镀锌钢带之间的粘接性能进行了研究。不同型号的热熔胶和镀锌钢带对粘接性能有很大的影响;压力升高到5 MPa时热熔胶与钢带之间的粘接性有一定的提高,一定范围内升高温度对材料的粘接性有一定的提高;对镀锌钢带表面进行Zn系磷化能很好地提高界面粘接效果。     

Synthesis and properties of flame-retardant reactive hot melt polyurethane adhesive

Abstract

A novel liquid polyphosphonate polyol (DMDP) was synthesized from dimethyl methylphosphonate and 1,6-hexanediol. Reactive hot melt polyurethane adhesives with high flame retardancy (HMPURs) were prepared from poly(tetramethylene ether glycol) (PTMG-2000), two kinds of poly(1,4-butylene adipate) (PBA-2000 and PBA-3000) and DMDP or dimethyl methylphosphonate as well as tetrahydrofuran acrylate. Five specimens of flame-retardant HMPURs with different weight percent of DMDP (0, 2, 4 and 6?wt%) and dimethyl methylphosphonate (4?wt%) were obtained. The mechanical properties, thermal stability, flammability, and bonding strength of the specimens were investigated. The results show that with the increase of DMDP content, the elongation at break and tensile strength decrease slightly, and the flame retardancy of HMPURs is significantly improved with the limiting oxygen index (LOI) value increasing from 17.2 to 28.2. The incorporation of DMDP leads to a higher thermal stability of HMPURs at high temperature and more char yield at 650?°C. With the increase of DMDP content, the final bond strength of HMPURs on the same substrate changes little, but the green strength of HMPUR-6 on the same substrate is observably less than other samples. The performance of HMPUR with the reactive flame retardant is superior to that of HMPUR with the additive flame retardant. In addition, the corresponding flame-retardant mechanism of DMDP-containing HMPURs was investigated by pyrolysis-gas chromatography coupled to mass spectrometry (Py-GC/MS). The results indicate that the pyrolysis of the HMPURs releases phosphorus-containing fragments to play a flame retardant role.     

二聚酸聚酰胺包头胶的研制

本文采用二聚酸聚酰肢为主体树脂，以聚乙烯改性物作改性树脂，松香酯增粘树脂、石蜡为粘度调节剂研制成鞋用包头胶。     

一种新的热熔型亚胺胶粘剂的研制

介绍一种以热塑性聚醚酰亚胺 (PEI)来改性双马来酰亚胺 (BMI)树脂 ,制成无溶剂的热熔型胶粘剂 ,其室温拉伸剪切强度≥ 11MPa ,2 2 0℃时≥ 14MPa,是一种新型的耐热胶粘剂