增白剂

Refining monomer and preparating plexiglas sheet having yellow color were researched. The two projects were adopted, one was to add fluorescence adding white acidifier OB and PF, the other was to process alkali to wash and add additive before rectifying.

对工业上精制单体制取有机玻璃板颜色发黄问题进行了研究，采用在预聚体中加荧光增白剂OB和PF与裂解单体进行精馏前碱洗及加添加剂两个方案。

The company now produces many series and varieties of new antionxidants,accelerantors ,vulcanization activators,brighteners ,processing aids (carbon black dispersant and silica dispersant)etc....All of these produce are green products with the characteristics of being atoxic ,low-poisonous ,no- polluted and environment friendly .

公司现有新型橡胶防老剂，新型橡胶促进剂、新型橡胶硫化活化剂、新型橡胶抗氧剂、新型橡胶增白剂、新型橡胶加工助剂、（碳黑分散剂及百碳黑分散剂）等多个系列数十个品种，普遍具有无毒、低毒、非污染、环保型绿色产品特点，其中数种产品被国家科技部命名为"国家级重点新产品"或获得"科技型中小企业创新基金"的无偿资助。

Our chemical Co.,Ltd is one of the biggest professional series of optical brightener producers in China.

我们是全国最大的确生产荧光增白剂系列产品的专业企业之一。

The performance, applied area and brightening effect of FBP-L liquid fluorescent brightener were introduced in this paper.

介绍了FBP-L液体荧光增白剂的性能指标、应用范围以及在增白实验中所表现出的增白效果，阐述了在实际生产中影响FBP-L液体荧光增白剂使用效果的诸多因素及应用注意事项。

And the additive synergism of built up multi-component fluorescent brightener for polyester fiber was confirmed through several examples.

详细介绍了涤纶用荧光增白剂的主要品种及其使用方式，并通过几组实例证实了多组分荧光增白剂复配后对于涤纶的加和增效作用。

The basic structure of chromogen in PFBs remains the same, so PFBs have fluorescent properties of traditional FBs. Covalent bonds between chromogen and macromolecule chains enhance their photochemical stability, increase their whitening performance and fluorescence quantum yield.

聚合型荧光增白剂中基本发色团的结构不变，具有传统荧光增白剂的光学性能；发色团与高分子链间的共价键使其光化学稳定性大大增强，增白性能和荧光量子产率显著提高。

Classification of the PFBs is briefly introduced. The synthesis, structure, properties and application of stilbene, naphthalimide and pyrene FBs are discussed.

简要介绍了聚合型荧光增白剂的分类，讨论了二苯乙烯、萘酰亚胺、花类聚合型荧光增白剂的合成、结构、性能及应用。

2 Choosing good liquid whitener: experiment proved, application of liquid whitener can reduce the yellowing coating products.

3.2 选用质量较好的液体增白剂：经实验证明，液体增白剂的应用可以减少涂布产品的返黄程度。

Then,from serum albumin in skin, it assessed some particular skin cleaning, whitening, oral skin whitener, and wrinkles in eye area.

从皮肤中的血清白蛋白出发，对一些特殊的皮肤清洁剂、增白剂、皮肤增白剂以及眼部去皱产品进行了评价。

Methoxystilbene and 2-methoxy-4'-nitrostilbene were synthesized from benzyl chloride and nitrobenzyl chloride by the Wittig reaction, and used as intermediates for the synthesis of the final product fluorescent whitener FP4,4'-bis(2-methoxystyrylbiphenyl via reduction and diazotisation of the latter followed by reaction with the former in the presence of NaOH.

以氯化苄和对硝基氯苄为原料，经Wittig反应合成中间体：2-甲氧基-二苯乙烯和2-甲氧基-4'-硝基-二苯乙烯。后者经还原反应、重氮化反应后，在氢氧化钠存在下与前者反应生成最终产品荧光增白剂FP4，4'-双-2-(甲氧基苯乙烯基联苯。为该类荧光增白剂的合成开辟了一条新路线

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。