- 更多网络例句与低聚反应相关的网络例句 [注：此内容来源于网络，仅供参考]
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The present invention relates to a coating composition comprising; A at least one polyester oligomer prepared from reactants comprising a 20 60 wt.% of at least one polyol, b 5 30 wt.% of at least one polycarboxylic acid selected from the group of cyclic polycarboxylic acids, the esters or the anhydrides thereof, wherein the carboxyl groups are separated by 3 carbon atoms or less, and from the group of alpha , beta -saturated acyclic polycarboxylic acids, the esters or the anhydrides thereof, and c 20 60 wt % of at least one monocarboxylic acid, the sum of the wt.% indicated for the reactants,, and always being 100 wt.%, and the oligomer being a low-viscosity oligomer having a weight average molecular weight Mw of less than 5,000, and a hydroxyl number in the range of about 200 to about 400 mg KOH/g oligomer, and B at least one polyisocyanate.
本发明涉及一种包含如下组分的涂料组合物：A至少一种由包含如下成分的反应物制备的聚酯低聚物：a20-60wt％至少一种多元醇，b5-30wt％至少一种选自其中羧基被3个或更少碳原子隔开的环状多元羧酸、其酯或酸酐以及选自α，β-饱和的无环多元羧酸、其酯或酸酐的多元羧酸，以及c20-60wt％至少一种一元羧酸，其中反应物、和的wt％之和总是为100wt％，所述低聚物是重均分子量Mw低于5000且羟基值为约200-约400mg KOH/g低聚物的低粘度低聚物，以及B至少一种多异氰酸酯。
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The catalytic activity of this new resin catalyst in the isobutene oligomerization was measured in detail, it exhibited good catalytic activity and excellent isobutene dimerization selectivity.
在异丁烯的低聚反应中，对这种新型树脂催化剂的催化活性进行了细致的研究，磺化聚醚碸酮树脂催化剂在反应中表现出了很好的催化活性和优良的二聚选择性。
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This invention carrying through alcoholysis of common gloss polyester chip, getting low-molecular polymer of polytetramethylene terephthalate, using this low-molecular polymer as pregnant liquor, doing esterification reaction and polycondensation reaction of PTA and hybrid diatomic alcohol in normal pressure, getting the modified copolyester product which has inherent viscosity of 0. 65-0. 85dl/g, fine pellucidity and is suitable in the application of engineering plastics.
本发明是通过对普通大有光聚酯切片进行醇解，得到对苯二甲酸乙二酯低聚物，以此低聚物为母液，在常压下使PTA与混合二元醇进行酯化反应和缩聚反应，制备得到了特性粘数在0.65-0.85dl/g且具有良好透明性的适用于工程塑料领域应用的改性共聚酯产品。
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After a short reaction time most of the monomer will have disappeared and the reaction system will contain a mixture of dimer, trimer and other low polymers
经过短时间反应后，大多数单体消失，反应体系将是含有二聚体，三聚体和其他低聚物的混合物。
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The oligomerization of isoprene with titanium tetrachloride as catalyst and alkylaluminium chlorides as promotor was studied, and especially the effects of the reaction conditions on the synthetic activity and selectivity of dimer and trimer were investigated in detail.
研究了以四氯化钛为主催化剂，以烷基铝为助催化剂催化异戊二烯的低聚反应，详细考察了各种反应条件对催化合成二聚体及三聚体的活性和选择性的影响。
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The intermediate decyl-glycidol ether of Gemini phosphate surfactant was synthesized with decanol and epichlorohydrin in the presence of phase-transfer catalyst; the intermediate decyl digomeric glycol of Gemini phosphate surfactant was prepared by opening ring reaction of decyl glycide ether and glycol in the presence of potassium as catalyst; and the influence of type and dosage of phase-transfer catalysts was studied.
以正癸醇与环氧氯丙烷为原料在相转移催化剂存在的条件下合成Gemini磷酸酯表面活性剂的中间体I-正癸基缩水甘油醚，讨论催化剂种类及用量对反应的影响；以乙二醇和正癸基缩水甘油醚为原料，金属钾为催化剂合成Gemini磷酸酯表面活性剂的中间体Ⅱ-正癸基低聚二醇，讨论催化剂种类与用量对反应的影响；以P2O5与正癸基低聚二醇为原料合成Gemini磷酸酯表面活性剂，讨论投料比、反应温度和反应时间等因素对反应的影响。
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A phosphorus-containing triazine oligomer was synthesized from triethyl phosphite, cyanuric chloride ,pentaerythritol and morpholine through three steps.
以亚磷酸三乙酯、三聚氰氯、季戊四醇和吗啉为原料，经3步反应合成了含磷三嗪环低聚物，考察了反应条件对中间体及产物收率的影响，对中间体及产物的结构和热性能进行了表征。
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Conductivity of Polyoxyethylene/Poly (2-vinyl pyridine)Blend and Compatibilizing Effect of Lithium Perchlorate;2. Graft terpolymerization of polyoxyethylene macromer with acrylates;3. Then multiblock copolymers was obtained by condensing polyoxyethylene and poly(2 vinylpyridine)with dichloromethane in the presence of potassium hydroxide.
甲基萘锂作为引发剂利用阴离子聚合得到 2 乙烯基吡啶的遥爪双羟基低聚物(P2VP)，然后以二氯甲烷作偶联剂与聚环氧乙烷反应制备P2VP和PEO多嵌段共聚物，考察了反应时间对偶联反应的影响，并对共聚物进行了IR和1H NMR表征，由1H NMR谱的积分曲线得到了共聚物中PEO链段质量分数。
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A novel method combining a conventional free-radical solution polymerization with a chemical saponification was used to synthesize a, cu-dicarboxyl terminated oligo s with molecular weight below 1500. Here, cn-carboxyl terminated oligo s were firstly synthesized by the free-radical polymerization in THF, where 4,4'-azobis(4-cyanovaleric acid) was used as initiator, thioglycolic acid as chain transfer agent, then CTBMA were transformed into di-CTBMA via saponifying CTBMA in dioxane/H_2O/KOH solution.
利用传统自由基聚合法，在四氢呋喃溶液中自由基引发聚合甲基丙烯酸丁酯单体而得到w-羧基-甲基丙烯酸丁酯低聚物(分子量在1500左右)；利用CTBMA 末端酯基的反应特性，在二氧六环／水／KOH混合溶液中皂化CTBMA，使之转化为a ，w-羧基甲基丙烯酸丁酯低聚物；研究了溶剂的类别、反应时间等反应条件对皂化产物结构的影响；利用MALDI-TOF-MS及LSIMS对皂化各阶段产物进行了分析监测。
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In order to improve the compatibility of these blends while maintaining the length of the in-situ formed TLCP fibrils and thermal resistance properties of TLCP, several novel compatibilizers, such as block and graft polymers, sulfonate ionomers, reactive oligomers, have been used to compatibilize PSF/TLCP blend.
为了在改善原位复合体系相容性的同时尽量保持TLCP的成纤性和体系的耐热性，本文提出了用嵌段及接枝共聚物、磺化聚砜锌盐、带有高反应活性基的反应性低聚体、可交联型低聚物作为增容剂改进体系的相容性。
- 更多网络解释与低聚反应相关的网络解释 [注：此内容来源于网络，仅供参考]
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Lysozyme：溶菌
醣制成多孔 基质,以增加其 解反应的表面积,同时采用溶菌(lysozyme)增加几丁聚醣解酵素增加其 解速 . 而生物体内的溶菌 (lysozym e) 是其中一种可分解几丁聚醣的酵素. 通首先将低凝胶温 (low gel point)的琼脂 (agarose)配置成40 mg/ml溶液5 ml.
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padding：填料
一种表面活性剂;以及一种阻燃组合物. 这些成分为低VOC. 首选阻燃组合物包括一种以锑为基础的化合物;一种卤化的、含活性氢的成分,能与聚异氰酸盐成分反应;和一种卤化的阻燃剂. 这种聚氨酯可在车辆中用作垫圈、封条、填料(padding)等等.
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amino resins：氨基树脂
由尿素、三聚氰胺(melamine)等氨基化合物与甲醛缩合反应所生成的可溶性产物一般统称为氨基树脂(Amino resins). 其中,脲醛树脂(UF)成本低,广泛用作木材产品的胶粘剂,而较贵的三聚氰胺-甲醛树脂(MF)则主要用作层压树脂,