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Preparation method of degradable amino molding plastic

An amino molding compound, a disposable technology, applied in the field of degradable amino molding compound and its preparation, can solve the problems of large number of workers in the production line, difficulty in controlling quality stability, and large dust in the operating environment

Inactive Publication Date: 2021-06-08
NANJING POLYTECHNIC INSITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation method of this thermosetting plastic is difficult to control the quality stability due to complicated operation procedures, a large number of workers are required for the production line, and the operating environment is dusty.
The thermosetting plastic is a downstream product belonging to the coal chemical industry, and the source of raw materials is abundant. However, because it is a thermosetting plastic, it cannot be reused, and product waste has become a problem for environmental pollution treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The injection molding grade plant fiber reinforced amino molding compound (sample 1) was prepared according to the following formula composition and process. The formula is:

[0014] Table 1 Formula composition of sample 1

[0015] name Dosage (number of servings) formaldehyde solution 28 urea 15 Hardener 2.0 Emulsifier, release agent, pigment 2.0 filler 60

[0016] Preparation:

[0017] (1) Put formaldehyde, urea and auxiliary materials into the vertical polymerization kettle in sequence according to the proportion of the above formula, control the temperature at 50°C to 60°C, and mix and stir the reaction time for 100 minutes to prepare the original slurry of urea-formaldehyde resin.

[0018] (2) Pour the resin stock solution into another mixing and drying reactor through the pipeline, set the stirring speed to 80rpm, add fillers, curing agents, mold release agents, emulsifiers, etc. in sequence according to the ratio in ...

Embodiment 2

[0021] The injection molding grade plant fiber reinforced amino molding compound (sample 2) was prepared according to the following formula composition and process. The formula is:

[0022] Table 2 Formula composition of sample 2

[0023] name Dosage (number of servings) formaldehyde 34 urea 12 Hardener 1.5 Emulsifier, release agent, pigment 1.8 filler 78

[0024] Preparation:

[0025] (1) The preparation method of urea-formaldehyde resin stock solution is the same as in Example 1.

[0026] (2) Pour the resin stock solution into another mixing and drying reactor through the pipeline, set the stirring speed at 80rpm, add filler, curing agent, mold release agent, emulsifier, etc. in sequence according to the ratio in the formula, and mix and stir evenly for 9 minutes; Raise the temperature, control the temperature at 60°C, increase the speed to 120rpm, and last for about 65 minutes; turn on the vacuum pump, continue to heat up, con...

Embodiment 3

[0029] The injection molding grade plant fiber reinforced amino molding compound (sample 3) was prepared according to the following formula composition and process. The formula is:

[0030] Table 3 Formula composition of sample 3

[0031] name Dosage (number of servings) formaldehyde 35 urea 10 Hardener 1.6 Emulsifier, release agent, pigment 1.8 filler 78

[0032] Preparation:

[0033] (1) The preparation method of urea-formaldehyde resin stock solution is the same as in Example 1.

[0034] (2) Pour the resin stock solution into another mixing and drying reactor through the pipeline, set the stirring speed at 80rpm, add filler, curing agent, mold release agent, emulsifier, etc. in sequence according to the ratio in the formula, and mix and stir evenly for 9 minutes; Raise the temperature, control the temperature at 60°C, increase the speed to 95pm, and continue for about 70 minutes; turn on the vacuum pump, continue to heat up, c...

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PUM

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Abstract

The invention provides degradable amino molding plastic and a preparation method thereof. A large amount of plant-derived biomass is added into a formula of the degradable amino molding plastic as a reinforcing component. The preparation method comprises the following steps: pre-polymerizing urea, a formaldehyde solution and auxiliary materials into urea resin, adding the urea resin, a curing agent, a release agent, a filler and the like into a mixing and drying reaction kettle, conducting uniform mixing, and carrying out vacuum mixing and polymerization to obtain degradable amino molding plastic.

Description

technical field [0001] The invention relates to a degradable amino molding compound and a preparation method thereof, belonging to the field of preparation of new chemical materials. [0002] technical background [0003] Amino molding compound is a kind of thermosetting plastic made of urea-formaldehyde resin as base material, natural fiber as reinforcing material, and compounded with various additives. The plastic has the advantages of smooth surface, bright color, non-toxic, tasteless, corrosion resistance, anti-aging, friction resistance, etc. In recent years, it has been widely used in tableware, sanitary ware, electrical accessories, auto parts and other fields. The existing preparation method of the thermosetting plastic has complicated operation procedures, difficult control of quality stability, a large number of workers required for the production line, and large dust in the operation environment. The thermosetting plastic is a downstream product belonging to the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/12C08L97/02C08L61/24C08J5/04
CPCC08G12/12C08J5/045C08J2397/02C08J2461/24
Inventor 易招娣米纲
Owner NANJING POLYTECHNIC INSITUTE
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