氯乙烯-醋酸乙烯酯共聚糊树脂的工业化生产

介绍了国内外氯乙烯-醋酸乙烯酯共聚糊树脂牌号和沈阳化工股份有限公司的氯乙烯-醋酸乙烯酯共聚糊树脂工业化生产技术、产品质量指标及"三废"治理与产品的应用情况。     

氯乙烯-醋酸乙烯酯共聚糊树脂中醋酸乙烯酯含量的测定

采用红外光谱法测定了氯乙烯-醋酸乙烯酯共聚糊树脂中醋酸乙烯酯的含量,并与热重法、化学分析法等分析方法进行了比较。指出氯乙烯-醋酸乙烯酯共聚糊树脂中醋酸乙烯酯含量的多种测定方法各有其特点,需要根据实际情况选用;红外光谱法快速、准确,可满足企业科研和生产所需。     

天业集团聚合工程中心一发明专利获授权

正近日,从国家知识产权局获悉,由天业集团兵团聚合工程中心申报的发明专利"一种含羟基氯乙烯-醋酸乙烯酯共聚树脂的制备方法"正式通过实质审查,并下发了"办理登记手续通知书"。据介绍,该发明提出了一种含羟基氯乙烯-醋酸乙烯酯共聚树脂的制备方法,使用该发明制造的含羟基氯乙烯-醋酸乙烯酯共聚树脂,白度高,溶解液无色透明,可应用于各种高档油漆、涂料、粘结剂     

酯溶性氯乙烯-醋酸乙烯酯共聚树脂的研发生产

对比进口与国产氯乙烯-醋酸乙烯酯共聚树脂的常规性能和应用性能,查找了国产氯醋树脂质量差距;针对氯乙烯和醋酸乙烯酯悬浮聚合过程提出了优化措施,改善了氯醋树脂的颗粒形态和分子组成的均匀度,进而提升了酯溶性等应用性能。     

国内专利精选

正微悬浮聚合制备丙烯酸酯改性氯乙烯-醋酸乙烯酯共聚树脂:CN105985479A∥苑会林(北京化工大学),公开日期:2016-10-05公开了一种丙烯酸酯改性氯乙烯-醋酸乙烯酯共聚树脂的制备方法,属于高分子合成领域。制备工艺为:将氯乙烯、醋酸乙烯酯、引发剂、分散剂、乳化剂、链转移剂依次加入反应釜中搅拌并升温,再将丙烯酸酯单体分批连续地加入到反应釜中,在50~80℃和0.3~1.2 MPa条件下进行聚合反     

氯醋共聚树脂生产环境空间中酯类物质含量的精密分析

通过改变气相色谱分析条件,提高了氯乙烯-醋酸乙烯酯共聚树脂生产环境空间中醋酸乙烯酯、丙烯酸丁酯、丙烯酸异辛酯分析结果的精密度和分析速度,对安全生产意义重大。     

运用正交设计开发氯乙烯-醋酸乙烯酯共聚糊树脂

介绍了开发氯乙烯 -醋酸乙烯酯共聚糊树脂的必要性及生产原料、工艺过程 ,并进行了正交设计优化乳化体系的试验。结果表明 :A3 B3 C2 为最佳条件 ,即当单釜加料主乳化剂 5 5 g,助乳化剂A 2 5 g ,助乳化剂B 8g,制得的氯乙烯 -醋酸乙烯酯共聚糊树脂的B型粘度贮存稳定性最佳 ,主乳化剂投料是影响B型粘度贮存稳定性的重要因素     

氯醋糊树脂的合成试验

通过氯乙烯与醋酸乙烯酯的共聚试验,研究了单体的投料配比、加料工艺、聚合转化率等对氯醋共聚糊树脂中醋酸乙烯酯含量以及树脂性能的影响规律,掌握了在10 L聚合釜中制备高醋酸乙烯酯含量氯醋糊树脂的聚合工艺。     

连续加料工艺对氯乙烯-醋酸乙烯酯共聚树脂性能的影响

对比了采用氯乙烯连续加料和一次性加料工艺生产的氯乙烯-醋酸乙烯酯共聚树脂(简称氯醋树脂)的质量和加工性能,结果表明:采用连续加料工艺生产的氯醋树脂的化学组成均匀,溶解性能和加工性能得到提高。     

氯乙烯-醋酸乙烯酯共聚物功能化改性

氯乙烯-醋酸乙烯酯树脂改性可以改善其相容性、耐水性及耐化学性。介绍了氯乙烯-醋酸乙烯酯树脂的改性,并分析了影响氯乙烯-醋酸乙烯酯树脂聚合的因素。     

氯醋共聚树脂的生产技术和应用

综述了氯醋共聚树脂的生产技术和产品应用状况,具体介绍了悬浮聚合法的关键技术问题,并展望用溶剂法或醇解法生产技术来促进我国多元共聚树脂的生产发展。     

氯乙烯-醋酸乙烯悬浮共聚树脂的开发与研究

采用悬浮聚合工艺制备出氯乙烯-醋酸乙烯(VC-VAC)共聚树脂,考察了聚合配方、聚合温度、搅拌速度及分散剂种类及用量对VC-VAC共聚树脂性能的影响。     

氯乙烯/丙烯酸酯二元及多元共聚物的研究进展

介绍了氯乙烯/丙烯酸酯多元共聚物、聚氯乙烯树脂/丙烯酸酯/顺丁烯二酰亚胺接枝共聚物、聚氯乙烯树脂/N-取代马来酸胺/丙烯酸酯接枝共聚树脂、氯乙烯/乙酸乙烯/丙烯酸羟丙酯共聚物、氯乙烯/乙酸乙烯/丙烯酸丁酯共聚乳液、聚丙烯酸酯-氯乙烯接枝共聚物、氯乙烯/乙烯/丙烯酸羟乙酯共聚涂料树脂、氯乙烯/丙烯酸甲酯共聚乳液的特点、生产工艺及其性能和用途.     

氯乙烯-醋酸乙烯酯共聚糊树脂的开发

介绍了国内外氯乙烯一醋酸乙烯酯共聚糊树脂的基本理论、生产状况、产品特性及工艺技术，并详细介绍了沈阳化工股份有限公司的氯醋糊树脂开发的进程、工艺及产品的质量指标。     

Preparation of copoly(vinyl alcohol–styrenesulfonic acid) resin and its catalytic activity on hydrolysis of carbohydrates. II. Two-step polymerization using tetraethylthiuram disulfide as an initiator

Copoly(vinyl alcohol–styrenesulfonic acid) resin was prepared by a two-step polymerization, consisting of a suspension polymerization of styrene containing divinylbenzene using tetraethylthiuram disulfide as an initiator and a subsequent block copolymerization of vinyl acetate to the crosslinked polystyrene obtained, followed by sulfonation and saponification. Some reaction conditions in the polymerization of styrene were investigated to obtain copolymer containing more vinyl alcohol units. The catalytic activity of the copolymer on the hydrolysis of dextrin was investigated and found to be increased with increasing amount of vinyl alcohol units and with a lowering degree of crosslinking of the copolymer. The maximum acceleration of rate obtained in the presence of the copolymer was about six times that in the presence of Amberlite 120B. Catalytic activity of the copolymer on hydrolysis of sucrose and methyl acetate were also investigated and found to be comparable each other and lower than that for dextrin. The difference between the activities for dextrin and for sucrose and methyl acetate increased with an increasing amount of vinyl alcohol units in the copolymer.     

环氧改性乙丙乳液及其乳胶漆的制备

采用特殊的乳化工艺使环氧树脂与醋酸乙烯、丙烯酸单体混溶进行共聚改性，所得的环氧改性乙丙乳液克服了乙丙乳液的缺点。介绍了环氧改性乙丙乳液及其内墙乳胶漆的配方、生产工艺以及性能指标。     

特种聚氯乙烯树脂生产概况

简述了国内外主要特种聚氯乙烯树脂(包括高聚合度PVC树脂、消光PVC树脂、PVC掺混树脂、氯乙烯一醋酸乙烯共聚树脂和氯化PVC树脂)的生产情况。并列举了主要特种PVC树脂的生产厂商、牌号和技术规格。     

PP/PE blends. IV. Characterization and compatibilization of blends of postconsumer resin with virgin PP and HDPE

The mechanical properties of blends of isotactic polypropylene and high-density polyethylene with a postconsumer resin (recycled dairy containers) were investigated over the entire composition range. Modification of these blends with an ethylene/propylene/diene copolymer or an ethylene/vinyl acetate copolymer was also investigated. Isotactic polypropylene/postconsumer resin blends have satisfactory impact and tensile properties at postconsumer resin contents of less than 50% for certain applications. At higher postconsumer resin contents, the tensile properties were adversely affected. The impact properties remained satisfactory. Addition of an ethylene/propylene/diene copolymer improved the mechanical properties of these blends to levels equal to or greater than those for neat isotactic polypropylene. Ethylene/vinyl acetate copolymers were also able to improve the mechanical properties, but not as efficiently as did the ethylene/propylene/diene copolymer. Blends of high-density polyethylene and a postconsumer resin had poor impact and tensile properties. Although the ethylene/propylene/diene copolymer and ethylene/vinyl acetate copolymers were able to improve these properties, the improvement was insufficient for general recycling, except at lower (≤25%) postconsumer resin contents. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 70: 2081–2095, 1998