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Preparation method of biodegradable environmental-friendly rigid foam plastic compound

A rigid foam, biodegradable technology, used in the field of plastics

Inactive Publication Date: 2014-04-30
SUZHOU WANTAI VACUUM FIRING FURNACE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because IPDI contains aliphatic rings, the strength of polyurethane is also higher, while HDI does not contain a ring structure and has lower strength, but its structure is relatively regular, which makes the polyurethane film crystallize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add organic solvents N-methylpyrrolidone (120.0kg), 4,4'-diphenylmethane diisocyanate (245.0kg) and isophorone diisocyanate (100.0kg) into a dry, clean reactor, polyethylene glycol Alcohol (185.0kg), dibutyltin dilaurate (0.72kg), and trimethylolpropane (84.2kg) are miscible, and the temperature control reaction is 2~3h to obtain the prepolymerized product; add ethylene glycol ether to the product obtained in the above steps (45.0kg), 1,4-butanediol (35.0kg), insulation reaction 2~3h, reclaim organic solvent, obtain a polyurethane reactant;

[0018] In the polyurethane reactant obtained above, add poly 3-hydroxybutyrate (100.0kg), organic silicone oil polydimethylsiloxane (180.0kg), triethylamine (17.8kg), water (2.5kg), Stir at high speed until foaming, when a large amount of foam appears, pour it into the mold immediately, mature at 40~60°C for 100 minutes, demould, and obtain high weather resistance polyurethane rigid foam plastic products.

Embodiment 2

[0020] Add organic solvents N-methylpyrrolidone (120.0kg), 4,4'-diphenylmethane diisocyanate (265.0kg) and isophorone diisocyanate (100.0kg) into a dry, clean reactor, polyethylene glycol Alcohol (185.0kg), dibutyltin dilaurate (0.72kg), and trimethylolpropane (84.2kg) are miscible, and the temperature control reaction is 2~3h to obtain the prepolymerized product; add ethylene glycol ether to the product obtained in the above steps (45.0kg), 1,4-butanediol (35.0kg), insulation reaction 2~3h, reclaim organic solvent, obtain a polyurethane reactant;

[0021] In the polyurethane reactant obtained above, add poly 3-hydroxybutyrate (85.0kg), organic silicone oil polydimethylsiloxane (180.0kg), triethylamine (17.8kg), water (2.5kg), Stir at high speed until foaming, when a large amount of foam appears, pour it into the mold immediately, mature at 40~60°C for 100 minutes, demould, and obtain high weather resistance polyurethane rigid foam plastic products.

Embodiment 3

[0023] Add organic solvents N-methylpyrrolidone (120.0kg), 4,4'-diphenylmethane diisocyanate (305.0kg) and isophorone diisocyanate (100.0kg) into a dry, clean reactor, polyethylene glycol Alcohol (215.0kg), dibutyltin dilaurate (0.72kg), and trimethylolpropane (84.2kg) are miscible, and the temperature control reaction is 2~3h to obtain the prepolymerized product; add ethylene glycol ether to the product obtained in the above steps (45.0kg), 1,4-butanediol (35.0kg), insulation reaction 2~3h, reclaim organic solvent, obtain a polyurethane reactant;

[0024] In the polyurethane reactant obtained above, add poly 3-hydroxybutyrate (110.0kg), organic silicone oil polydimethylsiloxane (180.0kg), triethylamine (17.8kg), water (2.5kg), Stir at high speed until foaming, when a large amount of foam appears, pour it into the mold immediately, mature at 40~60°C for 100 minutes, demould, and obtain high weather resistance polyurethane rigid foam plastic products.

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PUM

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Abstract

The invention discloses a preparation method of a biodegradable environmental-friendly rigid foam plastic compound. The method comprises the following steps: a, adding organic solvents, including N-methyl-2-pyrrolidinone, 4,4'-diphenyl-methane-diisocyanate (MDI), isophorone diisocyanate (IPDI) and polyethylene glycol (PEG) into a dry and clean reaction kettle, blending a catalytic amount of dibutyltin dilaurate and trimethylolpropane (TMP), and reacting under temperature control for 1-5 hours to obtain a pre-polymerization product; b, adding glycol ether and 1,4-butanediol into the pre-polymerization product, preserving heat for reacting for 1-5 hours, and recovering the organic solvents to obtain a polyurethane reactant; c, stirring the obtained polyurethane reactant, poly-3-polyhydroxybutyrate, organic silicone oil, triethylamine and a proper amount of water at a high speed till foaming; d, when a large amount of foam appears, injecting into a mold immediately, curing at the temperature of 40-60 DEG C for 50-180 minutes, and demolding to obtain a high-weather-resistance polyurethane rigid foam plastic product. The obtained compound is biodegraded, safe, non-toxic, simple in process, low in cost, and suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of plastics, in particular to a preparation method of a biodegradable environment-friendly rigid foam plastic compound. Background technique [0002] Due to the excellent characteristics of light weight, waterproof, high strength, corrosion resistance, and easy processing, plastics are widely used in various fields of the national economy. The production and use of plastics are increasing, and with it the problem is that the amount of waste plastics is also increasing. Discarded plastics, especially disposable plastic waste such as plastic mulch, garbage bags, shopping bags, tableware, food packaging bags, grocery and industrial product packaging bags, pollute farmland, tourist attractions, coastal ports, entangle marine life, and cause " "White pollution" is becoming more and more serious. Degradable plastics have the following advantages for the environment: (1) can be quickly made into compost and returned to nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L67/04C08L83/04C08J9/08C08J9/00C08G18/76C08G18/75C08G18/66C08G18/48C08G18/32C08G18/12
Inventor 李荣华
Owner SUZHOU WANTAI VACUUM FIRING FURNACE RES INST