查询词典 polyols

The result indicated that, gathers in advance the emulsion water resistance and mechanics performance which in the body preparation method the one-stage process obtains is good, but two steps obtain the emulsion stability is good; The neutralizaing agent triethylamine amount used should enable to achieve neutral between x-y, to gathers in advance the body disperser and the emulsion stability only then is advantageous; The water affinity chain extendor DMPA content to the emulsion viscosity, stable and the emulsion cellophane water resistance has the remarkable influence, its amount used general control between x-y; Hard section isocyanogen diethylene glycol dinitrate primary control paint film degree of hardness, module, anti-avulsion, wear-resisting and so on performance, the soft section low-molecular polymer polyols primary control paint film elasticity, hydrolisis performance and so on bears the low temperature and bears

结果表明，预聚体制备方法中一步法得到的乳液的耐水性和力学性能较好，而两步法得到的乳液的稳定性好；中和剂三乙胺的用量应使中和度达到x-y之间，对预聚体的分散和乳液的稳定性才有利；亲水扩链剂DMPA的含量对乳液的粘度、稳定性及乳液胶膜的耐水性有着显著的影响，其用量一般控制在x-y之间；硬段异氰酸酯主要控制涂膜的硬度、模量、抗撕裂、耐磨等性能，软段低聚物多元醇主要控制涂膜的弹性、耐低温和耐水解等性能

Polyester resins are the condensation products of polybasic acids and polyols.

聚酯树脂是多元酸和多元羟基化合缩聚而成。

The alkali lignin-based rigid polyurethane foam was prepared with alkali lignin extracted from black liquor as raw materials to replace 10%~25% amount of polyether polyols and polymethylene polyphenyl isocyanate.

以造纸黑液中提取的碱木质素为原料，代替10~25的聚醚多元醇与多亚甲基多苯基多异氰酸酯合成了碱木质素基硬质聚氨酯泡沫。

It was showed hyperbranched polyester was more than commercial resinous polyols in impact resistance and transparency of matt topcoating film,and its extinction was worse.

以超支化聚合物作为基料与脂肪酸等单体合成了超支化树脂，并利用红外光谱，GPC等仪器对超支化树脂进行表征；同时研究了超支化树脂在聚氨酯哑光面漆中的应用，研究表明：实验所制备的超支化树脂虽然消光效果较差，但是采用超支化树脂部分代替商业哑光树脂可以改善漆膜的透明性及耐冲击性。

A range of waterborne alkyd resins has been prepared by fatty acid process, based on soybean fatty acid, trimellitic anhydride, and various polyols and polybasic carboxylic acids, which are modified with benzoic acid, maleic anhydride and oleic acid.

通过脂肪酸法，选用豆油脂肪酸、偏苯三甲酸酐和不同的多元醇、多元酸制备了一系列水性醇酸树脂，用苯甲酸、顺丁烯二酸酐和油酸对其改性进行了研究。

The key whether long C link hindered polyols can be esterified is how to select the catalyst.

长碳链多元受阻醇的酯化能否顺利进行的关键在于催化剂的选择。

Polyesters made from the reaction between bio-polyols and anhydrides are shown to be a good adhesive for making particleboard.

研究表明以多羟基化合物和多元酸形成的聚酯型胶粘剂适合于制造颗粒板。

Glycols (e.g., ethylene glycol, or antifreeze) contain two hydroxyl groups, glycerol three, and polyols three or more.

甘醇有两个羟基，丙三醇有三个羟基，多元醇则有三个或三个以上羟基。

Polyols can be divided into latex polyol and dispersion polyolaccording to the way of preparation. In this paper, acrylic latex polyol and acrylic dispersionpolyol were synthesized respectively. One kind waterborne polyisocyanate, which was waterbornehexamethylenediisocyanate trimer, was obtained by hydrophilic modification. Andisophorone diisocyanate trimer (T1890E), which can formulate into 2K-WPU coatings withpolyols, was selected from the unmodified polyisocyanates.

本文合成了两种羟基组分：丙烯酸乳胶多元醇和丙烯酸分散体多元醇，亲水改性得到了一种水性多异氰酸酯组分：水性六亚甲基二异氰酸酯三聚体，同时在未改性的多异氰酸酯组分中遴选了一种多异氰酸酯：异佛尔酮二异氰酸酯三聚体(T1890E)，可用来组成双组分水性聚氨酯涂料。

In order to accomplish this change, our research have made several important break-through by revising new formulation especially in (1) catalyst mix,(2) adjustment of water content,(3) addition of chain extenders and crosslinkers, and(4) utilization of long-chained polyols. By doing so, the general performances of our new non-yellowing foam products are comparable to those of the traditional TDI based products. In certain mechanical properties in areas such as tensile strength, split tear strength, and elongation our measured values of 1.89 kg/cm2, 1.47 kg/cm, and 355 % respectively have out-performed the old materials.

能在研究中突破的原因，是因针对聚胺酯发泡体配方中的催化剂、水含量、链长剂种类、交联剂及搭配商业之改质长链三元醇，做各式各样之配方调整而成，与传统商业用之芳香族发泡体相比较，基本的成泡指数及性质相比拟上已相近，在抗张(1.89 kg/cm2，比TDI系统增加2.2倍)、撕裂(1.47 kg/cm，比TDI系统增加1.7倍)、延伸率(355 %，比TDI系统增加1.6倍)等机械性质上甚至比芳香族发泡体有更佳的表现。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐