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Simulated coral and preparation method thereof

A technology for coral and polyether polyol, applied in the field of simulated coral and its preparation, can solve the problems of difficult mixing, short curing time, short life, etc., and achieves simple process control conditions, stable product quality, and small mass ratio gap. Effect

Pending Publication Date: 2021-11-30
烟台捷锐水族用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with the semi-prepolymer method, the prepolymer method has a higher operating temperature, and the prepared prepolymer and the chain extender have short curing time, fast viscosity growth and poor fluidity after the mixed reaction, and due to the high viscosity of the prepolymer , the mixing ratio with the chain extender is very different and large, it is difficult to mix evenly, especially for products with higher hardness, the life in the kettle is very short, and it is impossible to produce products with complex structures and high product strength requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With the polyether polyol of 50 parts by weight, the hydroxyl equivalent of described polyether polyol is 300, and functionality is 2; Add the diisocyanate of 20 parts by weight, the functionality of described diisocyanate is 2.0; react at a temperature of 75°C for 3.5 hours, and stir continuously at a speed of 100 rpm to form a prepolymer. After the prepolymer drops to room temperature, it is filled and sealed to obtain component A.

[0019] 2 parts by weight of chain extender, said chain extender is 1,4-butanediol, ethylene glycol, 1,6-hexanediol, diethyltoluenediamine, 4,4'-diamino -One of 3,3'-dichlorodiphenylmethane, after melting the selected chain extender at 125°C, add 2 parts of tertiary amine catalyst, the tertiary amine catalyst is selected from triethanolamine, triethylenediamine , N, N-dimethylcyclohexylamine, dimethylethanolamine; add 0.5 parts of organotin catalyst, organotin catalyst selected from dibutyltin dilaurate, stannous octoate, dibutyltin diacet...

Embodiment 2

[0021] With the polyether polyol of 80 parts by weight, the hydroxyl equivalent of described polyether polyol is 300, and functionality is 2; Add the diisocyanate of 50 parts by weight, the functionality of described diisocyanate is 2.0; react at a temperature of 85°C for 2.5 hours, and stir continuously at a speed of 100 rpm to form a prepolymer. After the prepolymer drops to room temperature, it is filled and sealed to obtain component A.

[0022] 10 parts by weight of chain extender, said chain extender is 1,4-butanediol, ethylene glycol, 1,6-hexanediol, diethyltoluenediamine, 4,4'-diamino -One of 3,3'-dichlorodiphenylmethane, after melting the selected chain extender at 110°C, add 5 parts of tertiary amine catalyst, the tertiary amine catalyst is selected from triethanolamine, triethylenediamine , N, N-dimethylcyclohexylamine, dimethylethanolamine; add 5 parts of organotin catalysts, organotin catalysts are selected from dibutyltin dilaurate, stannous octoate, dibutyltin d...

Embodiment 3

[0024] With the polyether polyol of 65 parts by weight, the hydroxyl equivalent of described polyether polyol is 300, and functionality is 2; Add the diisocyanate of 35 parts by weight, the functionality of described diisocyanate is 2.0; react at a temperature of 80°C for 3 hours, and stir continuously at a speed of 100 rpm to form a prepolymer. After the prepolymer drops to room temperature, it is filled and sealed to obtain component A.

[0025] 6 parts by weight of chain extender, said chain extender is 1,4-butanediol, ethylene glycol, 1,6-hexanediol, diethyltoluenediamine, 4,4'-diamino -One of 3,3'-dichlorodiphenylmethane, after melting the selected chain extender at 118°C, add 4 parts of tertiary amine catalyst, the tertiary amine catalyst is selected from triethanolamine, triethylenediamine , N, N-dimethylcyclohexylamine, dimethylethanolamine; add 3 parts of organotin catalysts, organotin catalysts are selected from dibutyltin dilaurate, stannous octoate, dibutyltin diac...

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Abstract

The invention relates to a simulated coral and a preparation method thereof, the simulated coral is composed of a component A and a component B. The component A comprises, in parts by weight, 50-80 parts of polyether polyol and 20-50 parts of diisocyanate; and the component B comprises the following components in parts by weight: 30-50 parts of polyether polyol, 2-10 parts of a chain extender and 7.5-20 parts of a catalyst. The preparation method comprises the following steps: adding diisocyanate into polyether polyol, reacting for 2.5-3.5 hours at the temperature of 80 +/-5 DEG C, and continuously stirring at the speed of 100 revolutions per minute to obtain the component A; heating the component A and the component B to 110-125 DEG C for melting, adding the catalyst and the polyether polyol, reacting for 2.5-3.5 hours to obtain the component B, uniformly mixing the component A and the component B according to the weight ratio of (100: 90)-(100: 110), and injecting into a silica gel mold. The semi-prepolymer method is used for preparing the simulated coral, the component A and the component B are prepared in advance, the viscosity difference and the mass ratio difference of the two components are small, the two components are easy to mix uniformly, the process control conditions are simple, and the product quality is stable.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a simulated coral and a preparation method thereof. Background technique [0002] Artificial coral, also known as false coral or artificial coral, creates an atmosphere of the seabed for everyone in the modern aquarium, so that everyone feels as if they are in the real seabed when watching marine life. The main manufacturing materials of artificial coral are divided into PVC and polyester. The main preparation method of polyester elastomer products is to mix ether diol, diisocyanate and chain extender to synthesize by prepolymer method or semi-prepolymer method, that is, to mix the prepolymer containing excess isocyanate and chain extender Reaction preparation. [0003] Compared with the semi-prepolymer method, the prepolymer method has a higher operating temperature, and the prepared prepolymer and the chain extender have short curing time, fast viscosity growth and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/66C08G18/48C08G18/32
CPCC08G18/10C08G18/4825C08G18/6674C08G18/6685C08G18/3206C08G18/324C08G18/3814
Inventor 宋涛
Owner 烟台捷锐水族用品有限公司
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