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The reactions of isocyanate with alcohol or water are the key basic reaction for isocyanate bonding to wood.

异氰酸酯分别与醇和水的反应是异氰酸酯对木材胶接固化反应的核心基础反应。

The IR spectra of poly isocyanate curing agent with different content of TDI trimer was measured and analyzed.

对不同TDI三聚体含量的多异氰酸酯固化剂的红外光谱进行了测定,采用偏最小二乘法对所得到的红外光谱进行分析,测定了多异氰酸酯固化剂中TDI三聚体的含量,该方法简单快速,结果可靠。

The theoretical deduction and many experiments discovered that reaction of isocyanate with water is second order in room temperature, and the water and isocyanate are first order to the rate respectively.

通过理论推导和大量实验证明,室温下异氰酸酯与水的反应可以使用准二级方程描述,水和异氰酸酯基的分级数都是1。

The synthetic technology of moisture curing isocyanate adhesive and adhesive technology .bonding mechanism for high moisture content wood were studied in this paper.

本论文对用湿固化异氰酸酯胶粘剂的合成工艺、湿固化异氰酸酯胶粘剂与高含水率木材的胶接工艺以及高含水率木材的胶接机理进行了研究。

The IR spectra of polyisocyanate curing agent with different content of TDI trimer was measured and analyzed.

对不同TDI三聚体含量的多异氰酸酯固化剂的红外光谱进行了测定,采用偏最小二乘法对所得到的红外光谱进行分析,测定了多异氰酸酯固化剂中TDI三聚体的含量,该方法简单快速,结果可靠。

The photoproducts of CCU in organic solvents have also been identified with HPLC- and GC-MS. The photoproducts identified in methanol are isocyanato bezene, 4-chlorophenyl isocyanate, 2-chloro benzamide, chlorobenzene, 4-chlorophenyl urea, N-phenyl methylcarbamate, N-(4chlorophenyl) methylcarbamate, and 2-chloro-N-(4-chlorophenyl) benzamide.

对灭幼脲在各种有机溶剂中的光解产物作HPLC/UV和GC-MS鉴定,发现其在甲醇中的光解产物含有:异氰酸苯酯、对氯苯基异氰酸酯、邻氯苯甲酰胺、氯苯、对氯苯基脲、N-苯基氨基甲酸甲酯、N-氨基甲酸甲酯、以及N-邻氯苯甲酰胺等。

A method for the preparation of microcellular elastomeric polyurethane foams from a reaction mixture comprising a polyisocyanate component containing at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a variant thereof, a polyol composition comprising at least one polyoxyalkylene polyol having an average nominal hydroxyl functionality of from 2 to 6, an average hydroxyl equivalent weight of at least 1300 and an average oxyethylene content of between 50 and 85% by weight, water, a chain extender having an average hydroxyl equivalent weight of from 15 to 250 and optionally a crosslinking agent, the hardblock-content being more than 45% by weight.

本发明是有关一种制备微孔弹性聚氨基甲酸酯泡沫体的方法,其反应混合物包括:一种含至少85重量%的4,4′-二苯甲烷二异氰酸酯或其变体的聚异氰酸酯组分,一种多元醇组合物,其包含至少一种平均标称羟基官能度从2至6、平均羟基当量至少1300且平均氧乙烯含量介于50至85重量%之间的聚氧亚烷基多元醇,水,一种平均羟基当量为15至250之增链剂,以及视需要使用的交联剂,该硬性嵌段-含量(hardblock-content)大于45重量%。

Being Compared contact angle changes of various adhesives on different surface of Moso bamboo and Chinese fir with the coefficients of penetrability, it was found that wettiability of polymeric diphenylmethane diisocyanate adhesive was much better than emulsion polymer isocyanate adhesive, wettiability of phenol-formaldehyde adhesive and urea-formaldehyde adhesive were in the middle of above two adhesives.

通过研究不同胶粘剂在毛竹表面的接触角变化,并结合胶粘剂渗透扩散系数,发现聚异氰酸酯胶在竹材表面的润湿性较好,而双组分乳液型聚异氰酸酯胶的表面润湿性较差,酚醛树脂胶和脲醛树脂胶润湿能力处于二者中间。

Hexamethylene diisocyanate may be used in prepolymer, in place of TDI

六亚甲基二异氰酸酯可用在预聚物中代替甲苯二异氰酸酯〔TDI〕。

Hexamethylene diisocysnate may be used in prepolymer, in place of TD I.

六亚甲基二异氰酸酯可用在预聚物中代替甲苯二异氰酸酯〔toi〕。

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