Wanhua Chemical Group Co., Ltd.

Wanhua Chemical (ningbo) Co., Ltd.

Wangshun Qi

Weiqi Hua

Song Tu

Bo Wang

Hao Chen

Deqiang Ma

Zhongying Chen

Shuang Hu

Zilin Ni

Zijun Zhang

Weihua Sun

Houyi Li

Bing Lv

Xianbo Liu

Zhiyuan Liu

Zuolong Liu

Bo Xin

Xudong Wang

Cheng Gong

Zhanyu Zhao

Disclosed a no-added formaldehyde composite wood product binder, a no-added formaldehyde composite wood product manufactured by same, and a preparation method for the composite wood product. The no-added formaldehyde composite wood product binder comprises an agent A and an agent B. The agent A is an isocyanate-based binder, and the agent B is an aqueous dispersion of polyester based aliphatic polyurethane and/or a modified polyester-based aliphatic polyurethane. The no-added formaldehyde composite wood product is formed under hot-pressing after a wooden and/or straw material is mixed with the no-added formaldehyde composite wood product binder. The composite wood product manufactured by the no-added formaldehyde composite wood product binder has excellent water-proof and mechanical properties and a good saw cutting performance, and the amount of isocyanate used is also reduced, thereby reducing costs.

No-added formaldehyde binder for composite wood product and the composite wood product manufactured by the same

Provided are an emulsifiable isocyanate composition and a preparation method therefor. The emulsifiable isocyanate composition comprises the following components: (a) a polymethylene polyphenyl polyisocyanate, (b) an emulsifier, (c) an adduct derived from a diisocyanate, and optionally (d) a terpene monomer. The emulsifiable isocyanate composition is used in artificial board adhesives, and has a smaller mold cumulative effect, an improved demoulding performance and an extended pot life.

Emulsifiable isocyanate composition and preparation method and use thereof

The present invention discloses a method for intermittently producing 4,4'-diaminodicyclohexyl methane (HMDA) with a low amount of the trans-trans isomer thereof, which comprises: controlling the reaction process by stopping the reaction when, except for a solvent, the reaction solution comprises MDA of 0-5 wt % and HMDA of 1-20 wt %; and b) separating the reaction solution obtained from step a) by conventional means to obtain HMDA product with desired purity, and allowing the un-reacted material and intermediate product to be recycled to the reactor after being accumulated. The method of the present invention decreases the amount of the trans-trans isomer in HMDA, increases the yield of the reaction, and reduces the production cost. The present invention also provides a post treatment process of the reaction mixture.

Method for intermittently producing 4,4'-diaminodicyclohexylmethane with a low amount of the trans-trans isomer

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Shandong, China

Wangshun Qi