酚醛树脂

A better method of decreasing free formaldehyde and free phenol during the synthesis of phenolic resol resin was investigated.

经分析，改性后的酚醛树脂中，游离酚和游离醛的含量进一步降低。

However, phenolic resin contains high contents of free phenol and free formaldehyde that cannot be removed substantially.

但是，在制备酚醛树脂的过程中，有大量的游离酚、游离醛不能反应完全，残留在树脂中，对环境和人体的危害极大。

Its water resistance, gloss and fixed faster than the domestic similar phenolic resin products has greatly improved and enhanced.

其抗水性，光泽和固着速度比国内同类酚醛树脂产品有很大的改善和提高。

Effect of phenolic resin on laser ablation of B/KNO3 .

酚醛树脂对B/KNO3点火药激光烧蚀特性的影响。

On the basis of the optimum synthesis conditions, the techniques of the CO_2-cured phenolic resin for cold-box are researched.

在确定最佳合成工艺条件的基础上，对CO_2固化酚醛树脂砂冷芯盒工艺条件进行了研究。

To evaluate the occupational hazards control effect on a new construction project of phenolic resin.

目的 对某公司新建酚醛树脂项目进行职业病危害控制效果评价。

Mechanical properties of polysulfone modified phenolic resin reinforced with glass fiber during heat ageing of 500 hours at 200℃ and 230℃ are mainly discussed.

研究了聚砜改性酚醛树脂玻纤增强模塑料在200℃、230℃，时间为500h的热老化过程中所发生的力学性能变化情况。

In additional, we also add urea in the final step to improve the quality of the PF .

另外还从延长酚醛树脂胶的使用期进行了探索，即通过加入降乙烯醇来达到此目的。

But in the timber industry of our country, most of adhesives are Urea formaldehyde resin adhesive, phenol-formaldehyde resin adhesive and melamine formaldehyde resin adhesive which used formaldehyde as raw material.

在我国木材工业中，木材胶黏剂主要是以甲醛为原料的脲醛树脂胶黏剂、酚醛树脂胶黏剂和三聚氰胺-甲醛树脂胶黏剂。

This paper discussed some technical problems affected the quality of product,such as modifier proportioning in producing of cashew shell oil and melamine modified phenol resin,estimating of reaction terminal point and rinsing of reaction product.

探讨腰果壳油和三聚氰胺改性酚醛树脂生产中改性剂配比、反应终点判断和反应产物水洗等影响产品质量的技术问题，提出了解决问题的有效措施。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。