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Transparent nucleating agent, and preparation method and application thereof

A transparent nucleating agent, C1-C12 technology, applied in the preparation of carboxylate, carboxylate, urea derivatives, etc., can solve the problems of not being able to directly transmit light, opacity of crystalline polymers, etc., to improve aesthetics, The effect of changing the crystallization temperature and increasing the crystallization speed

Active Publication Date: 2017-12-22
孙志强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, because polymers have two phases of crystal region and amorphous region, visible light birefringence occurs between the two phase interfaces and cannot directly transmit light, so generally crystalline polymers are opaque.

Method used

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  • Transparent nucleating agent, and preparation method and application thereof
  • Transparent nucleating agent, and preparation method and application thereof
  • Transparent nucleating agent, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: the preparation of uramide salt of 4-tert-butylbenzoic acid

[0047]

[0048] In a four-neck flask, add 250mL of formic acid, 17.82g (0.1mol) of 4-tert-butylbenzoic acid and 6g of carbonamide, and heat for 3 hours under the conditions of pH 7.5 and temperature 50°C while reflux After stirring, the crystals were concentrated to obtain 20 g of white solid with a yield of 83.4%.

Embodiment 2

[0049] Embodiment 2: the preparation of 4-tert-butylbenzoic acid amine salt

[0050]

[0051] In a four-neck flask, add 400mL of water, 17.82g (0.1mol) of 4-tert-butylbenzoic acid and 7mL of 25% ammonia water, and heat for 1.5 hours at a pH of 8 and a temperature of 55°C while refluxing After stirring, the crystals were concentrated to obtain 16 g of white solid with a yield of 83.4%.

Embodiment 3

[0052] Example 3: Preparation of 4-tert-butyl-N,N-dimethyl-benzoic acid amine salt

[0053]

[0054] In a four-neck flask, add 400mL of methanol, 200mL of ethanol, 17.82g (0.1mol) of 4-tert-butylbenzoic acid and 11.25mL of 40% dimethylamine aqueous solution, at a pH of 7.5 and a temperature of 60°C Heated for 2 hours while stirring under reflux, and then concentrated the crystals to obtain 17 g of a white solid with a yield of 76%.

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Abstract

The invention provides a transparent nucleating agent, and a preparation method and application thereof. The transparent nucleating agent comprises a compound as shown in a formula (1) and a derivative thereof; the method comprises the steps of contacting a compound as shown in a formula (3) and a compound as shown in a formula (4), and performing concentration and crystallization; the transparent nucleating agent is applied to thermoplastic plastic. By the method, the transparent nucleating agent can be obtained; furthermore, through the adoption of the transparent nucleating agent or through the transparent nucleating agent prepared by the method, the crystallization speed of polyolefin can be effectively increased, the size and the crystallization temperature of the polyolefin crystal can be changed, and the aesthetic feeling and good visual impression of the polymer product can be improved. In particular for polyolefin (such as polypropylene and polyethylene), the transparent nucleating agent provided by the invention has irreplaceable superiority.

Description

technical field [0001] The present invention relates to a transparent nucleating agent and its preparation method and use, more specifically, to a transparent nucleating agent and its preparation method and use. The transparent nucleating agent comprises a compound represented by formula (1) and its derivative. Background technique [0002] During the crystallization process of polymers, some crystallization-promoting substances are usually artificially added, which act as crystal nuclei during the crystallization process, so they are called nucleating agents. Nucleating agents are often encountered in the crystallization of small molecules, but few people have proposed this concept. If there are impurities in the small molecule crystals, the crystallization speed will be accelerated, and the crystals will become smaller or imperfect crystals will appear. The rapid crystallization phenomenon that sometimes occurs when some impurity or a small amount of crystal nuclei (that...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C63/04C07C273/02C07C209/00C07C211/05C07C211/06C07C211/07C07C211/27C07C211/55C07C211/46C07C213/08C07C215/08C07C215/12C08K5/09C08K5/19C08L23/12
CPCC07C51/412C07C63/04C07C209/00C07C211/05C07C211/06C07C211/07C07C211/27C07C211/46C07C211/55C07C213/08C07C215/08C07C215/12C07C273/02C08K5/09C08K5/19C08L23/12
Inventor 孙志强段军堂孙钰涵
Owner 孙志强
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