Preparation method of hyperbranched microcrystal nucleating agent and preparation method of polyolefin resin
A nucleating agent and microcrystalline technology, which is applied in the field of polymer modification processing, can solve problems such as odor and environmental protection defects, and achieve the effects of improving nucleation effect, improving dispersion and reducing aggregation
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[0032]In the first aspect of the present invention, the present invention provides a preparation method of a hyperbranched microcrystalline nucleating agent, comprising: by mixing an organometallic salt nucleating agent, a hyperbranched aromatic polyester and a fatty acid amide, spraying obtained dry. First, the faster melting of organometallic salts during resin processing is accelerated by the interaction between organometallic salts and hyperbranched aromatic polyesters. Secondly, in the process of resin processing and cooling, the hydrogen bonds and π-π interactions between organometallic salts and hyperbranched polymers form hyperbranched crystallites, which promotes organometallic salts to disperse on the three-dimensional surface of hyperbranched polymers, weakening the The mutual aggregation of organic metal salt molecules improves their dispersion in the matrix resin, multiplies the nucleation point of the matrix resin, accelerates the crystallization process of the m...
Embodiment 1
[0050] Example 1 The hyperbranched crystallite nucleating agent was prepared by using different B-type substances. In addition, Example 1 also investigated the effect of spray drying on the hyperbranched microcrystalline nucleating agent of the present invention.
[0051] Experimental group 1-1
[0052] First, hyperbranched aromatic polyesters are prepared as follows:
[0053] The molar ratio of trimesic acid and ethylene glycol is 1:0.5 and added to the reactor, then add catalyst toluenesulfonic acid (its molar weight is 10% of the molar weight of trimesic acid), under the protection of inert gas nitrogen , react for 1 hour at 80°C; then add 1,3-bisoxazoline (its molar amount is 20% of the molar amount of trimesic acid), raise the temperature to 120°C, and then vacuum the reaction system, And continue to react under reduced pressure for 1 hour to prepare hyperbranched aromatic polyester. The weight average molecular weight of the hyperbranched aromatic polyester was determ...
Embodiment 2
[0077] Example 2 studied the effect of adjusting the weight ratio of the three components of A-type substance, B-type substance and C-type substance on the nucleation effect.
[0078] First, prepare the benzoic acid-terminated hyperbranched polyester according to the following method:
[0079] The molar ratio of trimesic acid and ethylene glycol is 1:0.5 and added to the reactor, then add catalyst toluenesulfonic acid (its molar weight is 10% of the molar weight of trimesic acid), under the protection of inert gas nitrogen , react for 1 hour at 80°C; then add 1,3-bisoxazoline (its molar amount is 20% of the molar amount of trimesic acid), raise the temperature to 120°C, and then vacuum the reaction system, And continue to react under reduced pressure for 1 hour to prepare hyperbranched aromatic polyester. The weight average molecular weight of the hyperbranched aromatic polyester was determined to be 1100.
[0080] After the completion of the B-type substance, the hyperbranc...
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