汽车修补涂料色母用分散剂的选用

通过对树脂、颜料、分散剂和混合溶剂的选择和定量,合成了通用色母。用指研法检验色母的分散稳定性,用倾流法或指擦法检验颜料的流动性,介绍了影响色母分散稳定性和颜料流动性的因素和原理,着重讨论了汽车修补涂料色母的单色浆微脂技术中分散剂的复配分散。     

国内简讯

电子工业部上海二十一研究所与江苏省扬州市邗江塑料色母厂共同研制成功QSM 86POM色母料。该色母着色比为1∶50。经国内几家无线电厂试用,一致反映采用该色母着色成型的录音机机芯板,色彩均匀美观,其力学性能几乎不受影响,耐老化性能有所提高;再与进口的日本M90-07聚甲醛色母相媲美,适用于各种型号的聚甲醛着色。不久,该技术将通过鉴定,并投入批量生产。     

先进聚合物合金公司推出新型热塑性弹性体

先进聚合物合金公司开发的DuraGrip热塑性弹性体，属通用热塑性弹性体，其性能特征尤其适用于软触摸工况，为30～80硬度计A级硬度，易于上色、涂黑或制成半透明或透明产品。     

新型热塑性弹性体问世

先进聚合物合金公司开发的Dura Grip热塑性弹性体，属通用热塑性弹性体。其性能特征尤其适用于软触摸工况，并日具有30-80硬度计A级硬度，易于上色、涂黑．可制成半透明或透明产品的特点。     

绿色万彩的美丽——访万彩（香港）有限公司张列锋先生

万彩(香港)有限公司(以下简称万彩)成立于1994年，是提供配色服务和色粉、色母的专业制造商。我们的产品系列包括流纹系列、珠光系列、夜光系列、荧光系列、大理石系列、感温变色系列，各类色母系列、香味色母系列、仿宝石系列、添加剂系列等，主要被用于电器行业、玩具行业以及包装行业中。     

颜料、颜料制剂及填料

贮存稳定的颜料分散浆、防腐阴极电泳涂料及其涂覆的物件;汽车修补漆用黑色通用色母     

会议报道

由电子工业部第廿一研究所研制,扬州市邗江塑料色母厂生产的QSM—86聚甲醛色母于1987年9月20日由电子工业部主持在南京通过了部级技术鉴定。与会代表一致认为该色母生产技术合理,产品质量稳定,均一性好,其主要性能指标达到国外同类产品的水平,填补了国内空白,为材料国产化作出了贡献。 QSM—86聚甲醛色母是新型高效的聚甲醛专用色母,着色比1∶50。该色母少量掺混于聚甲醛     

品质源于专业 服务来自真诚

<正>硅油:低粘度二甲基硅油、乙烯基硅油、多乙烯基硅油、含氢硅油、长链烷基硅油、苯基长链烷基硅油、苯基硅油、甲氧基硅油(结构化控制剂)、生胶封头剂灌封胶:电子灌封胶、导热灌封胶、绝缘灌封胶、硅凝胶催化剂:铂络合物(铂金催化剂)色母:适用于高温胶及液态胶色母高温胶:各种型号助剂:高温胶耐高温添加剂、模具清洗剂、加成型增粘剂     

简讯

PVC电线电缆用浓色母科研制成功 在北京市科协的主持下,北京电线厂和北京化学院共同研制的PVC电线电缆用浓色母料于1985年10月19日通过鉴定。 由于PVC粘度大并易分解,色母科的制造较为困难,国外于1982年才有报导。该研制组于1985年进行此项工作。他们参考进口PVC色母科,立足于国内的原材料供应,利用现有条件合理地进行配方筛选,获得了较好配方的色母科。使用该色母料着色的电线电缆其外观色泽、机     

高压副产蜡做色母分散剂的研究

研究了高压装置副产蜡做色母分散剂的性能。从微观角度分析了高压副产蜡的性质，探索加工工艺。试验表明，高压副产蜡做色母分散剂性能优越，工艺路线可行。     

Synthesis,characterization and end-use evaluation of epoxy resins prepared from diallyl and dipropyl bisphenol A

We have synthesized 2,2'(6')-diallyl-4,4'-isopropylidenediphenol (diallyl bisphenol A), 2,2'(6')-dipropyl-4,4'-isopropylidenediphenol (dipropyl bisphenol A), and epoxy resins (glycidyl ether oligomers) of different average molecular weights. The acrylic and methacrylic esters were prepared by reacting the epoxy resin with acrylic and methacrylic acids, respectively. The amine-cured epoxy resins showed promise as general-purpose adhesives, while the epoxy acrylates were found to be useful as reactive oligomers in ultraviolet (UV) radiation curable coatings, and the epoxy methacrylates as anaerobic adhesives.     

HDPE生产工艺进展

分析了高密度聚乙烯(HDPE)生产工艺现状和技术特点,淤浆聚合工艺是我国HDPE最主要的生产技术。利用釜式淤浆法工艺特点可开发双峰或多峰产品以实现其机械性能和加工性能的平衡;利用环管淤浆法工艺特点开发高性能管材料和宽相对分子质量分布产品;利用气相法工艺单线生产能力大的特点稳定生产通用产品;利用溶液法工艺产品均一性好、切换容易的特点开发高附加值特色产品。建议结合装置特点开发高性能HDPE。     

Thermokinetics of unsaturated polyester and vinyl ester resins

An experimental study was carried out to investigate the isothermal and non-isothermal curing kinetics of unsaturated polyester and vinyl ester resins, using differential scanning calorimetry (DSC). Emphasis was put on investigating the effect of low-profile additives on the curing kinetics of the thermo-setting resins. For the study, a general-purpose polyester resin and a vinyl ester resin were used, together with polyvinyl acetate (PVAc) as low-profile additive, benzoyl peroxide as initiator, and N,N-dimethyl aniline as promoter. It has been found that (1) the addition of the low-profile thermoplastic-additive decreases the rate of cure and, also, the final degree of cure of the resins, (2) the total heat of cure generated by isothermal cure is lower than that generated by non-isothermal cure, and (3) the resin/initiator mixture with promoter exhibits two major exotherm peaks during non-isothermal cure, but only a single exotherm peak during isothermal cure.     

新型苯乙烯挥发抑制剂及低苯乙烯挥发树脂

通过对华昌公司苯乙烯挥发抑制剂Merican 109加入树脂前后的固化性能及树脂对玻璃钢表面的粘接性能测试和对粘接测试后剥离表面的扫描电镜分析研究了Merican 109在树脂常温固化过程中对苯乙烯挥发的抑制作用。同时将华昌公司新型低苯乙烯挥发树脂MEF-2LSE、Merican 9709LSE、Merican 9406LSE等在常温固化过程中苯乙烯的挥发性与通用树脂进行了比较。结果表明,Merican 109与德国公司BYK 740作用相当,苯乙烯挥发量降低了50%～90%,且固化性能、粘接强度未受影响。MEF-2LSE树脂的低挥发性表现优异,15℃时挥发量为普通树脂的1/8。     

Interrelationship of strength and flow characteristics of polystyrene

This study investigated the interrelationship between strength and flow characteristics of general-purpose polystyrene (GPPS) used in injection molding applications. The ease of flow was chosen as a measure of processability and was evaluated using the melt flow rate and capillary rheometer techniques. Of the different strength tests that were examined, flexural and notched tensile strength tests were most effective in differentiating between commercial grades of high and low molecular weight GPPS. While characterizing strength of injection molded specimens, the degree of molecular orientation was taken into consideration. For unplasticized resins, increasing the weight average molecular weight by about 100,000 enhanced the flexural strength by 10%, but also increased the viscosity at low shear rates (10 to 100 s^?1). The increase in molecular weight had virtually no effect on viscosity at the highest shear rates (up to 10,000 s^?1). Plasticized resins displayed a 6% loss in flexural strength as well as a significant reduction in viscosity (throughout the shear rate range) as compared with the unplasticized resins. As expected, the improvement in strength achieved by increasing molecular weight leads to a simultaneous increase in the viscosity, i.e., a deterioration of processability. In addition, our study indicates that for samples without preferential molecular orientation, narrowing the molecular weight distribution significantly improves the balance of strength and melt flow rate properties.     

LDPE大棚膜专用树脂18B的开发

通过对低密度聚乙烯大棚膜专用树脂性能的分析，确定了专用树脂18B的性能指标及工艺操作条件，并试生产成功，大棚膜专用树脂18B的熔体流动指数为0．5－0．9g/10min，密度为0．918－0．922g/cm^2，拉伸强度为13．5MPa，薄膜雾度小于等于11％，具有保温，耐候，长寿，透明性高等优点，其机械性能也明显高于通用薄膜产品，是生产大棚膜，重包装膜的理想材料。     

Chemorheology of thermosetting resins. IV. The chemorheology and curing kinetics of vinyl ester resin

The rheological properties and curing kinetics of a vinyl ester resin have been determined during isothermal cure. Both steady and oscillatory shearing flow properties were determined using a cone-and-plate rheometer, and the curing kinetics were determined using a differential scanning calorimeter (DSC). Also determined were the rheological properties and curing kinetics of the resin when it had been thickened using magnesium oxide (MgO), in the presence of calcium carbonate (CaCO₃) as filler and polyvinyl acetate (PVAc) as low-profile additive. The steady shearing flow behavior observed with the vinyl ester resin was found to be very similar to that observed with a general-purpose polyester resin, reported in Paper I of this series [C. D. Han and K. W. Lem, J. Appl. Polym. Sci., 28 , 3155 (1983)]. However, a significant difference in the oscillatory shearing flow behavior was found between the two resins. We have concluded that dynamic measurement is much more sensitive to variations in resin chemistry than steady shearing flow measurement. DSC measurement has permitted us to determine the degree of cure as a function of cure time. By combining the rheological and DSC measurements, we have constructed plots describing how the viscosity increases with the degree of cure, at various isothermal curing temperatures.     

基于组件技术的虚拟测试系统开发

将传统的通用信号发生器与通用的测试仪的功能通过LabVIEW这个软件开发平台实现功能的高度集成,开发一种通用自动测试系统。以计算机和数据采集卡为基本硬件来实现激励信号的产生和响应信号的采集,本系统采用软件工程中面向组件的设计思想,从而使繁琐的编程过程转变为组件的开发和搭接两个步骤,同时采用严格数据类型的枚举控件,极大地提高了系统的可重用性和可扩展性。同时利用LabVIEW中同步控制技术中的Queue技术来完成通用自动测试系统组件的搭接,从而实现了信号源和测试仪的集成,由此避免了数据的丢失。     

悬浮法通用型聚氯乙烯树脂成品分析

介绍了分析悬浮法通用型聚氯乙烯树脂成品的一些实验室经验。     

Preparation and cured properties of novel cycloaliphatic epoxy resins

Preparation and characterization of novel cycloaliphatic epoxy resins, which are derived from octadienyl compounds, were studied. From a model peracetic acid epoxidation reaction using 2,7-octadienyl acetate-1, the structure of the liquid resins is estimated to be mainly terminal epoxides and some amount of inner epoxide depending on the epoxide content. The epoxy resins offer lower toxicity and lower vapor pressure. The reactivity of the resin with acid anhydrides is moderate but faster than that of traditional cyclohexane epoxide-type resins and slower than that of the glycidyl ester-type resins. This reactivity was also examined using model compounds. The heat deflection temperature of the hexahydro-phthalic anhydride-cured resins is shown to be directly proportional to the number of epoxy groups in the molecules. The flexural strength of the cured resins is nearly equivalent to that of the commercial resins, although the flexural elongation of the resins is larger than that of the rigid cyclohexane epoxide-type resins. The thermal stability of the cured resins is comparable to typical rigid cycloaliphatic resins; furthermore, high water resistance of the cured resins is suggested to be attributed to the hydrophobic character of the C₈ chain by cross-linking. © 1993 John Wiley & Sons, Inc.