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Polypropylene transparent nucleater

A transparent nucleating agent, polypropylene technology, applied in the field of polyolefin nucleating agent, to achieve the effect of improving rigidity, good product quality and good nucleation effect

Active Publication Date: 2008-09-17
JIANGSU TAIHU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nucleating agent is made of a single organic phosphoric acid, which still has the above disadvantages
[0012] Chinese patent application CN1803900A discloses a mixed organophosphate polypropylene nucleating agent and its preparation method. The nucleating agent is formed by mixing several organophosphates, although it is better than a single organophosphate as a nucleating agent. Some, but still have the above-mentioned deficiencies of organophosphates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] (Example 1): Preparation of type A compound.

[0034] 4g (0.1mol) of sodium hydroxide and 48.6g (0.1mol) of 2'-methylenebis(4,6-di-tert-butylphenoxy)phosphoric acid were added to 200mL of methanol, and stirred at room temperature for half an hour. Slowly add a solution made of calcium chloride 5.5g (0.05mol) and 60mL of water into the clear and transparent solution. After the addition is complete, heat up to 50°C and stir for 2 hours, cool, filter, wash with water, and dry to obtain the product of this example. Class A compound, denoted as A 1 , whose structural formula is shown in Table 1.

example 2～ example 4

[0036] The preparation method is basically the same as that of Example 1, except that the structural formula is shown in Table 1.

[0037] Table 1

[0038]

example 5

[0039] (Example 5): Preparation of Class B compound.

[0040] Stearic acid and sodium hydroxide of equal substance amount are stirred and reacted in water, filtered, washed with water, and dried to obtain the B class compound sodium stearate of this example, denoted as B 1 , see Table 2.

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Abstract

The invention discloses a polypropylene transparent nucleating agent, which consists of one or two compounds in category A accounting for 90 to 10 percent by weight and one or two compounds in category B accounting for 10 to 90 percent by weight. The compound(s) in category A is (are) multivalent metal salt(s) substituting for diaryl phosphoric acid; and the compound(s) in category B is (are) alkali metal salt(s) of monobasic fatty acid. The polypropylene transparent nucleating agent disclosed by the invention overwhelms the defects of organic phosphates in use, such as too high melting point, limited compatibleness with resin, poor dispersibility, causing flaws on the surfaces of products easily and so on. By adopting the invention, the polypropylene transparent nucleating agent improves the rigidity, the tensile strength, the creep resistance, the heat distortion temperature of polypropylene and so on, brings high transparency to polypropylene, and reducing the forming cycle. Products got by adopting the invention are of high quality.

Description

technical field [0001] The invention relates to a polyolefin nucleating agent, in particular to a polypropylene transparent nucleating agent. Background technique [0002] Crystalline polymers such as polyolefins, including polyethylene PE, polypropylene PP, poly(1-butene), polyester (such as polyethylene terephthalate PET) and polyamide during processing The crystallization speed of the melt is slow, and it is easy to form spherulites, which affects the mechanical properties of the product and the transparency of the product. In the mid-1970s, the Japanese Hamad found that after adding sorbitol bisbenzaldehyde (DBS) to polypropylene, the transparency and gloss of polypropylene were significantly improved, and it could be compared with typical transparent materials such as PET, PS, PVC, etc. Comparable. The anti-reflection polypropylene has a heat distortion temperature better than PET, PS and PVC (the heat distortion temperature of resins such as PET, PS and PVC is below ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/521C08K5/09
Inventor 杜杨顾晓峰崔瑞
Owner JIANGSU TAIHU CHEM
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