Cuprous iodide suspension and preparation method thereof
A cuprous iodide and suspension technology, applied in the field of nylon fabric preparation, can solve the problems of affecting the crystallinity of PA66 slices, affecting the spinning strength of PA66 slices, etc.
Active Publication Date: 2021-08-13
上海珐工材料科技有限公司
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Problems solved by technology
As we all know, the dehydration polycondensation of 66 salt to PA66 is a water phase reaction. Copper acetate, potassium iodide and potassium bromide are all soluble in water, but cuprous iodide is insoluble in water. The copper acetate and potassium iodide used in the batch method are two-component The characteristics of being soluble in water, but in terms of practical application effect, the cuprous iodide and potassium bromide system is better than the copper acetate and potassium iodide system for three reasons: 1) copper acetate will produce acetate after being dissolved in water, acetic acid The root will act as a polymerization inhibitor in the 66 salt polycondensation process, directly affecting the relative viscosity and molecular weight distribution of the PA66 melt, 2) the copper acetate and potassium iodide system will increase the shear viscosity of the PA66 melt and reduce the transparency of the PA66 slice, 3) The copper acetate and potassium iodide system will affect the crystallinity of PA66 slices, which will affect the spinning strength of PA66 slices. At present, the domestic use of PA66 slices with heat-resistant and stable characteristics obtained by batch polymerization is used for airbag filaments and cords. The strength is around 9.0D / g (gram denier), which belongs to the middle and low level
Method used
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Embodiment 1～5
[0033] The preparation method of embodiment 1~5 is as follows:
[0034] S1. Put E wax and cuprous iodide into a high-speed mixer (2400 rpm), and at the same time raise the temperature of the mixer to 60°C, start stirring, take it out after stirring for 10 minutes, and cool to room temperature.
[0035] S2, the distilled water that weighs and nano-montmorillonite are put into grinder, after continuous grinding 30 minutes, the mixture (cuprous iodide and E wax) of step S1 is poured in grinder, continue to grind 120 minutes again, After observing that there is no obvious sediment in the slurry, release it, put it into a black plastic airtight barrel for use, and carry out calibration according to Examples 1-5.
[0036] Surface-treated nano-montmorillonite has strong lipophilicity and a very large specific surface area, and at the same time has a relatively large gravitational force, and cuprous iodide has strong lipophilicity after E wax surface treatment, so that multiple nano-m...
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The invention relates to the technical field of nylon fabric preparation, and especially relates to a cuprous iodide suspension and a preparation method thereof. The suspension comprises, by weight, 1.5-4.5% of cuprous iodide; 1% of nano montmorillonite; 0.2% of a cuprous iodide surface treatment agent; and 94.3-97.3% of distilled water. The cuprous iodide suspension and the potassium bromide solution are added into the batch polymerization reaction of PA66 together, so that the application of the cuprous iodide and potassium bromide system in the batch method for preparing PA66 is realized.
Description
technical field [0001] The invention relates to the technical field of nylon fabric preparation, in particular to a cuprous iodide suspension and a preparation method thereof. Background technique [0002] PA66 (polyhexamethylene adipamide, commonly known as nylon 66) is formed by polycondensation of adipic acid and hexamethylenediamine. Adipyl salt), and then 66 salts are subjected to dehydration polycondensation reaction, and amide bonds are generated during the dehydration process, thereby forming linear polymers. At present, there are two kinds of PA66 polymerization reaction methods: batch method and continuous method. [0003] PA66 with heat-resistant and stable characteristics refers to the formation of six-membered ring chelates of copper / iodine or copper / bromine during the polymerization of PA66. This chelate has the function of a heat-resistant protective layer, so that PA66 slices have Long-term use in high temperature environment. Theoretically, the PA66 polym...
Claims
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IPC IPC(8): C08G69/28C08G69/26
CPCC08G69/28C08G69/26
Inventor 叶楚祥
Owner 上海珐工材料科技有限公司