塑料助剂需求预测

业内专家认为 :我国主要塑料助剂的发展趋势如下 :(1 )增塑剂 :按照 2 0 0 1年国内聚氯乙烯的需求量为 2 50万t的预测 ,增塑剂的需求量将达 55万 t,加上合成橡胶等行业的需求 ,总需求量将达到 70万 t;(2 )热稳定剂 :预计2 0 0 1年热稳定剂的需求为 9万 t左右 ,为满足需求 ,调整现有产品结构 ,开发稀土和复合金属皂类等无毒热稳定剂是热稳定剂工业的发展趋势 ;(3 )阻燃剂 :我国目前阻燃剂主要用于家电产品、矿用运输带、电线电缆等方面 ,随着聚氯乙烯制品在建筑业的需求量增长 ,用于聚氯乙烯制品中的阻燃剂的需求量将增长。同时 ,高效、低烟…     

硬质聚氯乙烯热稳定剂及其选择

当前发展我国的聚氯乙烯工业,必须大力开发硬质聚氯乙烯制品,而生产硬质聚氯乙烯制品,热稳定剂是不可缺少的助剂。因此必须加速热稳定剂的开发。国外对热稳定剂展开了大量的研究工作,本文拟就此问题作简要介绍。 一、国外概况 由于各国聚氯乙烯软硬制品的比例不同,热稳定剂的品种结构有很大的差异。美国以钡/镉稳定剂为主,日本以铅系稳定剂为主,但无论是钡/镉稳定剂还是铅系稳定剂都是有毒的物质,在生产和使用中不仅伤害     

聚氯乙烯电缆料简述

本文简述了聚氯乙烯电缆料的生产过程，考察了树脂、增塑剂、稳定剂和填料用量对制品的影响。     

环氧大豆油酸丁酯合成工艺研究

环氧大豆油酸丁酯,是一种无毒增塑刺和稳定剂,由大豆油与丁醇进行酯交换得大豆油酸丁酯,然后在硫酸及甲酸存在下用双氧水环氧化而制得,作为增塑剂和稳定剂,用于聚氯乙烯制品和氯丁橡胶制品,能提高制品的光、热稳定性及耐侯性。     

成果转让

无毒塑料增塑剂环氧大豆油是一种广泛使用的无毒、无味的聚氯乙烯增塑剂兼稳定剂 ,对光、热有良好的稳定作用 ,且相容性好、挥发性低、迁移性小。它既能吸收聚氯乙烯树脂在分解时放出的氯化氢 ,又能与聚氯乙烯树脂相容。几乎可以用于所有的聚氯乙烯制品。在一般的聚氯乙烯树脂制品中使用２～３ｐｈｒ,可明显改善制品的光、热稳定性。在要求耐候性高的农用薄膜中加入５ｐｈｒ可大大延长使用寿命。使用环氧大豆油的聚氯乙烯塑料制品 ,不但其材料成本会有所降低 ,它的各项物理性能还有不同程度的提高 ,如耐加工性、耐热老化性、耐折性等。加入…     

高屏蔽紫外光透明增塑PVC薄膜的研制

研究了增塑剂、热稳定剂、紫外光吸收剂、受阻胺光稳定剂对增塑聚氯乙烯(PVC)薄膜的紫外光与可见光透过率的影响,通过优化配方,制得一种高屏蔽紫外光透明增塑PVC薄膜。结果表明:在PVC树脂中,加入适量的邻苯二甲酸二异壬酯增塑剂、有机锡热稳定剂以及紫外光吸收剂和受阻胺光稳定剂,制得的增塑PVC功能薄膜能屏蔽99.8%以上的紫外光,并且可见光平均透过率在76%以上。     

静态热稳定性实验在PVC透明硬制品用钙锌热稳定剂筛选中的应用

采用静态热稳定性试验的方法,分别对聚氯乙烯(PVC)透明硬制品的环保增塑剂配方体系下的不同钙锌热稳定剂品种进行试验分析,并与有机锡类稳定剂进行对比研究,发现其中194#钙锌热稳定剂综合性能最佳,稳定时间与有机锡类热稳定剂相当,片状热稳定失重性能优于有机锡类热稳定剂,粉状热稳定失重性能与有机锡类热稳定剂接近,所加工样品的透明度较好,变色情况较轻,基本满足PVC透明硬制品的要求。     

聚氯乙烯稳定剂的行情看好

热稳定剂主要用于聚氯乙烯的加工过程,它可以减少聚氯乙烯由于受到热光作用而发生的降解变色,有效延长制品的使用寿命。而聚氯乙烯具有强度高、耐腐蚀、阻燃、绝缘性好、透明度高等优点,用途十分广泛。     

环氧棉子油在聚氯乙烯加工中的稳定作用和增塑剂行为

本文研究了环氧棉子油特性、作用和应用效果。表明环氧棉子油是优良的增塑剂兼稳定剂,适用于各种聚氯乙烯(PvC)加工配方。单用或与酯类增塑剂合用可减少迁移性,提高物料熔融流变和稳定性;与热稳定剂并用时,有显著协同效应,赋予制品较好的透明度、力学性能租和老化性。价廉无毒,可直接替代环氧大豆油,具有较高的实用价值和效益。     

苯甲酸哌啶醇酯HALS的合成工艺研究

苯甲酸哌啶醇酯是一种重要的受阻胺类光稳定剂,效率是一般光稳定剂的2～3倍。广泛用作聚氯乙烯、聚乙烯、纤维素塑料的光稳定剂,也可以用作聚氨基甲酸酯、泡沫塑料、聚酯类的光稳定剂及增塑剂。     

PVC加工用热稳定剂现状及发展

简要介绍了现有有关PVC加工用热稳定剂的环保政策法规，重点阐述了国内PVC塑料制品现状和铅盐类热稳定剂生产状况，就热稳定剂现在的处境及发展方向进行了分析，为生产企业在严峻形势下的生存与发展提供一些思路。     

Synthesis of glycidylethylhexylphthalate and its effects on poly(vinyl chloride) films as a novel plasticizer

To improve the processability and prevent the thermal degradation of poly(vinyl chloride) (PVC), various plasticizers and heat stabilizers have to be compounded. Phthalic plasticizers and metal soap stabilizers are usually used with epoxides as costabilizers. Epoxidized soybean oil (ESO), is one of the most commonly used epoxides because of its typical combined roles as a plasticizer and heat stabilizer in PVC compounds. ESO, however, sometimes causes surface contamination of PVC compounds because saturated fatty acids such as stearic and palmitic acids in soybean oil easily bleed onto the surface. In addition, some ingredients in ESO with hydroxide groups and unreacted double bonds during epoxidization also tend to increase the bleeding of ESO. This is due to their low compatibility with PVC resins. In this study, a novel plasticizer of PVC resins, glycidylethylhexylphthalate (GEHP), was synthesized, and its performance was evaluated. GEHP was designed to act as a plasticizer like normal phthalic plasticizers and to act as a heat stabilizer like ESO. Through the addition of epoxy groups in phthalic compounds, the resistance to bleeding was improved, and the plasticizing and heat‐stabilizing effects on the PVC compounds were preserved. Soft PVC films were prepared with GEHP. The mechanical properties, thermal stability, and bleeding properties of the films were investigated. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 1347–1356, 2005     

中国聚氯乙烯下游应用现状及发展趋势

介绍了当前中国聚氯乙烯行业下游总体运行状况,并从PVC管道、异型材、地板、木塑墙板、软质膜等聚氯乙烯下游产品阐述了下游制品发展现状及特点。     

PVC木塑热稳定剂研究现状

介绍了PVC木塑热稳定剂的稳定机理、各类热稳定剂的特点及热稳定剂的发展趋势。综述了目前国内外各类PVC木塑热稳定剂合成与应用研究的新进展,并对我国热稳定剂的环保化发展方向提出了建议。     

热稳定剂对PVC塑料异型材变色因素的影响

稳定剂是能防止或抑制PVC树脂在成型和使用过程中由于光、热、氧和机械作用而引起的分解的物质。本文通过热稳定剂的作用机理、主要性能等的论述,指出了常用热稳定剂对PVC塑料异型材变色的影响,最后指出了发展绿色环境保型稳定剂应注意的一些事项。     

Influence of additional thermal stabilizers on the reprocessing of postconsumer poly(vinyl chloride) bottles

The addition of heat stabilizers is essential for preventing the degradation of poly(vinyl chloride) (PVC) during its processing. The heat stabilizers consumed in the first run have to be made up before the reprocessing of recycled PVC. In this study, solvent‐cast films, which were prepared from granulated postconsumer PVC bottles mixed with plasticizers and thermal stabilizers, were used. The films were subjected to various heat treatments. No considerable structural change upon heat treatments at 140–160°C was found in IR and differential scanning calorimetry analyses. Polyene formation observed through ultraviolet analysis was not severe, indicating that the added stabilizers worked well in preventing degradation. The weight loss during the heat treatments was attributed partly to the decomposition of PVC and the evaporation of volatile components and mainly to the removal of the solvent upon heating. Although this study was conducted with water bottles that were to be recycled, it may be equally well applied to other similarly formulated PVC‐based materials, such as packaging films. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3994–3999, 2003     

Recycling of Waste PET: Usage as Secondary Plasticizer for PVC

Postconsumer water bottle poly(ethylene terephthalate) (PET) flakes were depolymerized with ethylene glycol (EG) by the glycolysis reaction in the presence of zinc acetate as the catalyst. In the depolymerization reactions, different weight ratios of PET/EG were used. In order to obtain polyesters used as PVC plasticizers, these glycolysis products containing hydroxyl end groups were reacted with an adipic acid (AA)–containing diacid group at equivalent amounts. In order to obtain PVC plastisols, PVC was dispersed into a plasticizers' mixture composed of di-isooctyl phthalate (DOP) and polyester products by using a high-speed mixer (PVC/plasticizers, 65/35 w/w). For the preparation of plasticizer mixture polyester products were used at a weight ratio of 20%, 40%, 60% of DOP. Plasticized PVC sheets were prepared from plastisols and their glass transition temperatures (T_g), migration, and mechanical properties were determined. The results show that the polyester products obtained from glycolysis products of waste PET can be used as secondary plasticizers, with DOP for PVC.     

Soft PVC foams: Study of the gelation,fusion, and foaming processes. II. Adipate,citrate and other types of plasticizers

Plasticized poly(vinyl chloride) (PVC) is one of the most useful polymeric materials on an industrial scale because of its processability, wide range of obtainable properties, and low cost. PVC plastisols are used in the production of flexible PVC foams. Phthalates are the most used plasticizers for PVC, and in a previous article (part I of this series), we discussed the influence of phthalate ester type plasticizers on the foaming process and on the quality of the foams obtained from the corresponding plastisols. Because the use of phthalate plasticizers has been questioned because of possible health implications, the objective of this work was to undertake a similar study with 11 commercial alternative plasticizers to phthalates. The evolution of the dynamic and extensional viscosity and the interactions and thermal transitions undergone by the plastisols during the heating process were studied. Foams were obtained by rotational molding and were characterized by the determination of their thermomechanical properties, density, and cell size distribution. Correlations were obtained between the molecular weight and structure of the plasticizer and the behavior of the corresponding plastisols. After the characterization of the final foamed product, we concluded that foams of relatively good quality could be prepared with alternative plasticizers for replacing phthalates. Several plasticizers {Mesamoll (alkylsulfonic phenyl ester), Eastman 168 [bis(2‐ethylhexyl)‐1,4‐benzenedicarboxylate], Hexamoll [di(isononyl) cyclohexane‐1,2‐dicarboxylate], Citroflex A4 acetyl tributyl citrate (ATBC), and Plastomoll (dihexyl adipate)} were found to be interesting alternatives in the production of soft PVC foams because they provided very good quality foams with properties similar to, or even better than, those obtained with phthalate plasticizers. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Soft PVC foams: Study of the gelation,fusion, and foaming processes. I. Phthalate ester plasticizers

The use of foamed plastics gains more and more interest every day. Flexible poly(vinyl chloride) (PVC) foams have excellent mechanical properties and low price, thus their application is extensive. Foams are produced from plastisols, which are based on the suspension of the PVC resin in a plasticizer. Phthalates are the most used plasticizers in flexible PVC foam formation. In this study, we have studied the influence of the phthalate ester‐type plasticizers on the foaming process and the quality of the foams obtained from the corresponding plastisols. For the plastisols prepared with the nine phthalate plasticizers considered, we have studied and discussed the complex and extensional viscosities; the thermal behavior (DSC) including the decomposition of the chemical blowing agent, and the foam production by rotational molding. In addition, we have characterized the foams obtained by thermomechanical analysis, density, and bubble size distribution. As expected, clear correlations have been obtained between the molecular weight and structure of the plasticizer with the rheological behavior of the plastisols. The knowledge of the gelation and fusion processes and evolution of the extensional viscosity of the plastisols combined with the study of the thermal decomposition of the blowing agent in each plastisol allows for better understanding of the complex dynamic behavior of these foaming systems. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

聚氯乙烯热稳定剂研究和应用的新进展

聚氯乙烯（PVC）是产量仅次于聚烯烃的塑料品种。随着环境保护要求的提高，交效、无毒热稳定剂的开发和应用成为聚氯乙烯研究的重要内容。本文对近十年来国内外在PVC的热稳定方面包括传统热稳定剂和新型热稳定剂所作的研究工作进行了总结，同时指出，若要完全取代有毒的铅盐稳定剂，还有许多工作要做。