金属用底胶表面处理的工艺研究

以730胶粘剂为底胶对金属被粘表面进行处理。试验了底胶和处理工艺对金属与丁腈橡胶粘接强度的影响,对产品进行了老化试验和实际应用。结果表明,该工艺金属被粘面的活性期长达21d,且可大幅度提高粘接强度。     

室温固化耐热150度环氧树脂结构胶粘剂

介绍了一种以液体端羧基丁腈橡胶（CTBN）改性环氧树脂为主体,改性聚硫橡胶为固化剂的结构胶粘剂,该胶强度高,韧性好,室温固化10d,室温剪切强度23．6MPa,150℃剪切强度为13．3MPa,200摄氏度剪切强度为5．6MPa,室温剥离强度6．0kN.m^-1,综合性能优异,用于,航天工业耐热结构部件的粘接。     

盾构管片专用胶的研制及应用

以端羧基液体丁腈橡胶、环氧树脂、增稠剂、着色剂等为主要材料,研制了一种盾构管片专用的改性环氧树脂胶粘剂。通过将三元乙丙橡胶密封条和丁腈软木衬垫粘接在盾构管片上,有效地解决了盾构管片的渗水和安装问题。实验结果表明,制备的胶粘剂拉伸强度和剥离强度均满足设计要求,具有强度高、耐水性和耐老化性强等优点。     

影响水性聚氨酯复膜胶粘接性能因素的研究

探讨了影响水性聚氨酯复膜胶粘接性能的各种因素,并对它们的影响规律做了初步研究。发现低聚物多元醇、异氰酸酯和固化剂的种类及用量,以及胶本身的表面张力和固含量是影响粘接性能的主要因素。     

水性聚氨酯底胶的研究

采用水性聚氨酯分散体作为PVDC乳液的底胶（底涂剂）,研究了聚合物多元醇、异氰酸酯、封端剂、润湿剂等对涂膜性能的影响,确定了以苯酐-己二酸聚酯多元醇、TDI／MDI混合并氰酸酯、BDO等为主要原材料合成了水性底胶,实验结果表明,该底胶的各项性能完全达到溶剂型底胶的性能要求,且以水为稀释剂大大降低了原材料成本,同时有利于环保。     

材料组分对结构粘接用水基抑制腐蚀底胶性能影响

在铝合金零件的胶接工艺中,为延长粘接面的适用期限,改善粘接面的粘接性能,结构粘接用底胶应运而生。随着对环境友好型胶粘剂的要求日益提升,水基结构粘接用底胶受到日益关注。以实验室自制的环氧树脂水分散体为基体,以改性咪唑为促进剂,探究了固化剂、气相Si O2、偶联剂、抑制腐蚀剂对底胶性能的影响,并形成了一种相对优化的底胶制备方法。     

YH—204耐热胶在微型汽车制动蹄片上的粘接应用

制动蹄片是微型汽车制动器系统的一个重要部件,微型汽车的制动性能好坏,制动蹄片是关键,制动蹄片的质量是直接影响制动性能的零件。1988年6月以前,我厂生产的微型汽车制动蹄片是采用粘接加铆接的方法,其结构如图1所示。     

建材用聚氨酯界面粘接胶浆

<正>江苏工业学院与常州合成化工总厂介绍了一种双组分无溶剂聚氨酯(PU)界面粘接胶浆(PUA-II),可用于PU和EPS等轻质高分子建筑泡沫材料的粘接。     

防护服装用高性能聚氨酯胶黏剂研制

研制了一种单组分聚氨酯胶黏剂,与德国TIPTOP公司的SC2000冷硫化胶黏剂配合使用,可完成特种防护服装所需的TPU(热塑性聚氨酯)/铝合金的粘接。通过黏结的剥离强度、耐湿热、耐水解性以及黏结缝的回弹性、屈挠性能、抗菌防霉性能试验验证,证明胶黏剂的性能指标达到了使用要求。     

聚碳酸酯型聚氨酯—环氧树脂IPN的性能及结构形态

由甲苯二异氰酸酯和聚六亚甲基碳酸酯二醇制备聚氨酯预聚体,再由该预聚体、双酚A环氧树脂等用同步法合成了聚碳酸酯型聚氨酯-环氧树脂互穿网络聚合物（PCPU－EPIPN）。红外光谱分析表明PCPU和EP两组分间存在一定的化学结合。差示扫描量热分析及热重分析研究表明：IPN在高温区存在单一玻璃化转变峰,当PCPU与EP的质量比mU／mE＝25／75时,IPN的Tg最高且热稳定性最好。透射电镜和扫描隧道显微镜研究表明,PCPU与EP的配比对IPN的形态结构有显著的影响。应力-应变测试发现：当mU／mE＝25／75时IPN体系力学性能最佳。     

环氧树脂改性水性聚氨酯的制备与性能研究

以异氟尔酮二异氰酸酯(IPDI)、聚四氢呋喃醚二醇(PTMG)以及二羟基甲基丙酸(DMPA)为主要原料合成水性聚氨酯(WPU)预聚体,在此基础上加入环氧树脂(EP,E-44)制备了环氧树脂改性水性聚氨酯(PUE)复合乳液。探讨了不同环氧树脂含量对复合乳液性能的影响,并对胶膜的力学性能、吸水率、接触角和热性能等进行了表征。结果表明,适量的环氧树脂改性过后的复合乳液比较稳定;随着环氧树脂含量的增加,乳液粒径和黏度增大,同时胶膜的拉伸强度增大,水的接触角增大,胶膜的热稳定性增加。E-44质量分数为7%~9%时,复合乳液及其胶膜的综合性能较好。     

Preparation and Characterization of Electroconductive Adhesives of NanoG/Polyurethane-Epoxy IPNs

Polyurethanes (PU) based on toluene diisocyanate (TDI) and polypropylene glycol 2000 (PPG) were reacted with an epoxy resin (EP) to prepare interpenetrating polymer networks (IPNs). Three kinds of electroconductive adhesives were prepared by dispersing nano-graphite (NanoG) into different matrices, i.e., pure PU, crosslinked PU/EP, and pure EP. The effects of epoxy content on morphological structure, conducting properties, thermal stability, and adhesive properties of the electroconductive adhesives were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy, standard digital multimeter, dynamic mechanical thermal analysis, and lapshear tests. The results indicate that epoxy in the polyurethane-epoxy IPN adhesives plays an important role in clanging the morphological structure and improving conductivity properties, thermal stability, and adhesive properties of the electroconductive adhesives of PU.     

Morphologies and Mechanical Properties of Polyurethane/Epoxy Resin Interpenetrating Network Composites Modified with Kaolin

Polyurethane/epoxy resin (PU/EP)/dimethyl sulfoxide modified kaolin (PU/EP/K-DMSO) interpenetrating network composites were prepared by in situ intercalation method. FT-IR showed that hydrogen bonding existed between kaolin and PU/EP matrix. The structure of composites was characterized by XRD, SEM and TEM. The result indicated that: K-DMSO by a nanometer size and homodisperse in the PU/EP matrix. The analysis of images obtained by polarizing microscope showed that bubble diameter has decreased with the K-DMSO added. Mechanical test results indicated that: the tensile and compression strength of the PU/EP/K-DMSO composites are superior to those of the PU/EP IPNs.     

耐蒸煮软包装用聚氨酯胶黏剂的研制

耐蒸煮软包装用聚氨酯胶黏剂应用于制备需高温杀菌蒸煮的食品包装袋.为了满足耐蒸煮要求,提高胶黏剂的耐高温性、耐水解性,对胶黏剂的分子结构进行设计.通过环氧树脂与聚氨酯形成互穿网络结构,并在分子链中引入噁唑烷酮基团,提高了热稳定性;硅烷偶联剂的加入,提高了耐湿热粘接强度;所得胶黏剂与性能完全超过GB/F 10004-1998耐蒸煮复合膜、袋的要求(PA/CPP蒸煮前剥离力≥5.0N/15mm,蒸煮后剥离力≥4.0N/15mm),与日本同类产品性能相当.     

丙烯腈下游产品生产工艺及市场

介绍了丙烯腈主要下游产品腈纶、ABS树脂及丁腈橡胶的生产工艺、市场状况及未来的发展趋势。     

Preparation and mechanical behavior of modified epoxy resin with grafted silicon rubber

Epoxy resin (EP) was modified by grafted silicon rubbers (g-SRs) prepared by co-polymerization of methyl vinyl silicon rubber with vinyl acetate. The branched structure of the g-SRs has been identified by infrared spectrum. The mechanical properties of modified EP were examined and the related fracture surfaces were observed by a scanning electron microscope. The results indicated that the EPs have been reinforced and toughened obviously by the addition of g-SRs. The mechanical properties of modified EPs depended not only on synthesis processes of co-polymerization, but also on the amount of the g-SRs added. The best combination of tensile and impact strengths for the cured modified EPs have been reached by that modified with 15 phr g-SRs. The morphology of modified EP is remarkably different from that of the pure cured EP.     

硅烷偶联剂对电场下丁腈橡胶与铁硫化粘接性能的影响

采用电化学反应的作用方法,研究硅烷偶联剂对丁腈橡胶（NBR）与铁（Fe）的热硫化粘接性能的影响。通过对胶接破坏表面进行扫描电镜以及能谱观察分析,明晰了NBR-Fe粘接界面层的结构特征,并对影响粘合性能以及硫化胶物理机械性能的因素进行了研究分析。结果表明,施加的电场强度、导电填料种类以及硅烷偶联剂的用量对粘合性能作用明显;硅烷偶联剂用量变化不仅对粘合性能影响较大,而且影响NBR硫化胶的导电性及物理机械性能。     

包装机械用聚氨酯胶辊的研制

介绍了包装机械用聚氨酯胶辊的研制过程,浇注工艺、胶料配方及产品性能。     

用于覆铜板回流线聚氨酯胶辊的研制

以聚醚，ＴＤＩ，ＭＯＣＡ为原料研制了胶辊用浇注型聚氨酯弹性体，讨论了预聚体胶及胶辊制备中的影响因素，并且对配方，模具，成型工艺，力学性能等作了简单的介绍，生产的橡胶辊成功地应用在覆铜板生产设备压制回流线中。