低温快固自交联型涂料印花胶粘剂

由广西健成精细化工有限公司研制的低温快固自交联型涂料印花胶粘剂已通过鉴定,并将批量生产投放市场.该胶粘剂属第五代节能型涂料印花胶粘剂,具有焙烘温度低、时间短以及自交联和印花织物性能优良等特点.其原料是丙烯酸酯和低温高活性单体,经种子乳液聚合制备.该粘合剂外观为乳白色半透明液体,粘度≤0.2Pa·s(25±1℃),固含量30.0±2%,成膜物色泽为五色透明.采用此种胶粘剂可减少传统印染工艺生产工序.经检索,本产品达到和部分超过德国Hoechst公司Imperon 760 Binder产品性能指标.     

水性聚氨酯印花粘合剂应用工艺研究

以聚乙二醇（PEG）、异佛尔酮二异氰酸酯（IPDI）为原料,二羟甲基丙酸（DMPA）为亲水扩链剂,乙二胺为非亲水扩链剂,三乙胺（TEA）为中和剂,采用预聚体分散法合成水性聚氨酯涂料印花粘合剂。通过单因素分析法测试涂料印花织物牢度指标等性能,确定了最佳整理工艺为：焙烘温度为150℃,焙烘时间为3min,粘合剂用量25g,涂料用量Rg．交联剂用量0.8g,增稠剂用量2~4g。     

低温涂料印花粘合剂现状

本文概述了国内外低温涂料印花粘合剂现状,着重介绍了实际应用中为降低焙烘温度、缩短焙固时间而主要采用的几种途径:加入低温型交联剂;以活性单体为原料合成低温自交联型粘合剂;加入催化剂;射线固着。     

低温自交联型印花涂料粘合剂

粘合剂是印花涂料的主要组分，其性能直接影响印花牢度，印品手感，焙烘条件等。目前普通应用的印花料粘合剂，存在着能耗高，污染环境等缺点，难以适应不耐高温的纤维织物。新研制的低温自交联印花涂料粘合剂，采用低温水相印花工艺，减少污染，节省了能源。     

JL—1织物涂料印花粘合剂通过鉴定

JL—1自交联织物涂料印花粘合剂是广州市化工研究所的最新科研成果,于86年12月通过鉴定。这种目前较为先进的第三代自交联涂料印花粘合剂是以丙烯酸类为单体,采用乳液聚合的工艺路线,它内含自交     

涂料印花粘合剂采用核—壳结构型乳胶的研究

本文着重讨论了以苯乙烯、丙烯酸-2-乙基己酯为主单体,加入少量含羧基和酰胺基的功能性单体的核一壳结构型乳胶的合成及其在涂料印花上的应用。通过一系列的试验表明:合成一种核的玻璃化温度在-72～-68℃,壳的玻璃化温度在0～50℃之间的乳胶,能较好地满足在具有良好的色牢度和柔软性的前提下,不会产生回粘的涂料印花要求,可作为织物上涂料印花的粘合剂使用。     

低温速固自交联型涂料印花胶粘剂

广西健成精细化工有限公司研制 ,以丙烯酸酯和低温高活性单体为原料 ,经种子乳液聚合制备具有焙烧温度低、时间短及自交联和印花织物性能优等特点。外观为乳白色半透明液体 ,固含量 30± 2 % ,粘度≤ 0 .2Ｐａ.ｓ(2 5℃± 1℃ ) ,成膜物无色透明 ,产品质量达到和部分超过德国Ｉｍｐｅｒｏｎ 76 0Ｂｉｎｄｅｒ性能指标低温速固自交联型涂料印花胶粘剂@王沛熹     

核壳型常温自交联丙烯酸酯乳液的合成

根据"粒子设计"原理,采用种子预乳化半连续核壳乳液聚合工艺,引入常温自交联单体,合成了具有硬核软壳结构、常温自交联的可用于木器涂料的丙烯酸酯乳液。通过试验表明,核组分玻璃化温度为80~85℃、壳组分玻璃化温度为-5～0℃,并且核壳质量比为6∶4;自交联单体DAAM添加量为4%,且在壳组分含量为3%;MAA添加量为1.5%,核/壳中添加的羧基质量比为1∶3时,聚合物乳液抗粘连性、耐醇性、成膜性等综合性能好。     

柔软型自交联涂料印花粘合剂的研制

合成了柔软型自交联聚丙烯酸酯类涂料印花粘合剂，井对单体的配虑、乳化剂的配虑及用量、引发剂用量、反应温度和时间进行了研究，确定了最佳合成工艺。     

1种涂料印花粘合剂的合成与应用

以丙烯酸丁酯、甲基丙烯酸甲酯、苯乙烯和丙烯腈作为共聚单体制备了TF-320自交联型涂料印花粘合剂,适宜的合成工艺参数为：交联单体A为单体总质量的3％。4％：分别g／,单体质量3％-4％的十二烷基磺酸钠和AE09（质量比为1：3）为复合乳化剂、0．5％～0．8％的过硫酸铵为引发剂,分别以总体系质量O．1％的磷酸二氢钠为缓冲剂、0．05％的正十二硫醇为调节剂,反应温度在80℃,采用连续滴加单体和引发剂的方法,滴加时间控制在2．0～3．0h。在此条件下所得产品可以给予织物优异的牢度、较高的得色量和柔软的手感,印花织物的干、湿摩擦牢度均达到或超过某市场主流产品。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。