含氟聚合物及其涂料

斥油性和持久性好的斥油涂料组合物;旋转机器中运动叶片用无机物填充的氟聚物涂料;核壳型含氟丙烯酸醢共聚乳液;聚偏氟乙烯，聚丙烯酸酯复合乳液的合成与性能;全氟丙烯酸醢的特点及其水基聚合物的制法;一罐装氟树脂涂料及防污染方法;用于无机基材的涂料组合物。     

聚偏氟乙烯-丙烯酸酯原位乳液聚合的研究

采用原位乳液聚合 ,将聚偏氟乙烯 (PVDF)溶解于丙烯酸酯单体中 ,以碳氟表面活性剂 (FC- 80 ,氟醚 )和碳氢表面活性剂 (SLS、OP - 10 )为乳化剂 ,合成了PVDF改性的聚丙烯酸酯乳液 ,乳液在六个月内无分层现象。并用偏光显微镜和示差量热扫描仪对涂膜的结晶行为和热行为进行了研究 ,结果表明 :聚丙烯酸酯破坏了聚偏氟乙烯的结晶性使得改性后的胶膜透明。     

聚吡咯／聚偏氟乙烯纳米纤维复合电阻型薄膜气敏元件及其制作方法

本发明公开了聚吡咯／聚偏氟乙烯纳米纤维复合电阻型薄膜气敏元件及其制作方法。采用静电纺丝法在具有金叉指的陶瓷基体电极上沉积聚偏氟乙烯纳米纤维,然后通过气相原位聚合在其上复合聚苯胺得到聚吡咯／聚偏氟乙烯纳米纤维复合气体敏感薄膜。本发明制备工艺简单,成本低,‘尤其适用于批量生产。     

一种聚偏氟乙烯改性聚丙烯酸酯乳液的制备方法

本发明涉及一种聚偏氟乙烯改性聚丙烯酸酯乳液的制备方法，首先制备甲基丙烯酸甲酯、丙烯酸丁酯和丙烯酸组成的单体混合物，将聚偏氟乙烯溶解在上述单体混合物中，然后将助乳化剂溶解于上述混合物中，组成油相备用；将非离子乳化剂和阴离子乳化剂溶解在水中，组成水相，然后，将油相和水相混合后高速搅拌，成为细乳液，在氮气保护下，向容器中加入上述细乳液和引发剂，反应一段时间后降至室温，调节pH值，即得聚偏氟乙烯改性的聚丙烯酸酯乳液。本发明由于和基材的粘结力好，成膜后胶膜的表面性能好，且无污染。可以在要求耐污染、耐热性、耐水性、耐药品和不粘性的领域用于基材的表面改性。如用于建筑外墙、纺织、皮革制品的耐水、耐油剂等领域。     

共聚改性聚偏氟乙烯水性乳液制备及应用研究

为了制备高固含量、长期贮存稳定、可常温固化的含氟聚合物水性乳液，借鉴无皂乳液聚合技术在偏氟乙烯聚合过程中加入全氟或多氟烷基氧化胺型表面活性剂，以偏氟乙烯-六氟丙烯（VDF-HFP）共聚物为种子乳液，丙烯酸类单体共聚物为壳层，通过优化共聚组分含量、聚合工艺条件，共聚改性制备高固含量聚偏氟乙烯水性乳液。结果表明：制备的水性PVDF乳液固含量40%～53%，放置4个月仍保持颗粒原始状态，高速搅拌剪切未出现凝聚现象，常温固化后的漆膜外观平整光滑，表面无缺陷。经施工及涂膜性能测试评价，共聚改性PVDF水性乳液喷涂、辊涂施工正常，漆膜综合性能与溶剂型PVDF涂料相当。     

氟化工专利精选

含氟调聚化合物和包含所述含氟调聚化合物的聚合物;含氟聚合物及含有该聚合物的含氟聚合物的组合物;1种具有强界面结合力的聚偏氟乙烯中空纤维复合微孔膜的制备方法;聚偏氟乙烯膜的表面改性方法;含氟弹性体的制造方法;1种制备聚偏氟乙烯多孔膜的方法;使用氟化表面活性剂进行的氟化单体的水乳液聚合;聚偏氟乙烯基中空纤维型微孔膜及其制造方法。     

中国专利

<正>一种高耐热聚合物纳米复合纤维薄膜制备方法本发明利用静电纺丝技术成功制得高耐热纳米级复合纤维薄膜,属于薄膜的改性领域。方法如下:分别制备聚偏氟乙烯和聚醚酰亚胺溶液,将聚偏氟乙烯与聚醚酰亚胺按质量比为9∶1混合得到均相纺丝溶液。利用静电纺丝技术将所制均相纺丝溶液进行纺丝成膜,烘干,即得到热稳定性能高的聚偏氟乙烯/聚     

氟树脂性能与加工应用(续9)

介绍了偏氟乙烯的物性和合成方法,叙述了偏氟乙烯的乳液、悬浮、溶液聚合和共聚方法.介绍了氟乙烯的物性和合成方法,叙述了氟乙烯的乳液、悬浮、本体聚合与接枝聚合方法.     

一种聚偏氟乙烯/二氧化钛复合纳米纤维膜的制备方法

正本发明涉及一种聚偏氟乙烯/二氧化钛复合纳米纤维膜的制备方法。本发明采用的是溶胶凝胶、静电纺丝和溶胶热法相结合的制备方法。所得到的聚偏氟乙烯/二氧化钛复合纳米纤维膜具较大比表面积,光催化活性高及有可塑性强。这不但克服了二氧化钛粉末在回收过程的困难,同时也给予一个柔软的基体,对典型的二氧化钛生长在钛板或导电玻璃更是另一种突破。本发明利用静电纺丝法得到的聚偏氟乙烯/二氧化钛复合亚纳     

模塑级聚偏氟乙烯乳液聚合工艺的研究

研究了乳液聚合工艺对模塑级聚偏氟乙烯(PVDF)树脂性能的影响。结果表明：将乳化剂全氟辛酸和乳液稳定剂石蜡复合使用，可得到粒径分布窄、稳定性良好的PVDF乳液，聚合用石蜡可循环使用，聚合残留的偏氟乙烯(VDF)单体经气液分离、干燥后可用于聚合反应；确定了在100L卧式釜中乳液聚合制备模塑级PVDF的工艺条件为：搅拌转速60r／min、过硫酸铵用量0．035％、链转移剂用量0．6％、全氟辛酸用量0．13％、石蜡用量0．2％，所制得的PVDF的性能可达到国外同类产品的水平。     

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。