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Environment-friendly plastic toy product preparation method

A technology for environmentally friendly plastics and toys, applied in the field of environmentally friendly materials, can solve the problems of aging resistance, plastic toys are not environmentally friendly, etc., and achieve the effects of improved high temperature resistance and aging resistance, good mechanical strength, and high hardness

Inactive Publication Date: 2021-10-22
漳平市国联玩具礼品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art that plastic toys made of traditional materials are not environmentally friendly and not resistant to aging, the purpose of the present invention is to provide a method for preparing environmentally friendly plastic toy products

Method used

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  • Environment-friendly plastic toy product preparation method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for preparing an environmentally friendly plastic toy product, comprising the following steps:

[0045] Step 1, prepare polyurethane prepolymer:

[0046] Weigh polycarbonate diol and diphenylmethane diisocyanate mixed prepolymerization reaction to prepare polyurethane prepolymer; wherein, the number average molecular weight of polycarbonate diol is 1000-4000; the reaction temperature of prepolymerization 50°C, the reaction time is 2h;

[0047] Step 2, prepare polyurethane elastomer:

[0048] Weigh 3,3-dichloro-4,4-diphenylmethanediamine and ethylene glycol according to the amount, first mix 3,3-dichloro-4,4-diphenylmethanediamine with polyurethane prepolymer Mixing, stirring and reacting at 78°C for 0.5-1h, then adding ethylene glycol, and then adding a catalyst for polymerization to prepare a polyurethane elastomer; wherein, the reaction temperature of the polymerization reaction is 78°C, and the reaction time is 4h; The mass ratio of 3,3-dichloro-4,4-diphe...

Embodiment 2

[0062] A method for preparing an environmentally friendly plastic toy product, comprising the following steps:

[0063] Step 1, prepare polyurethane prepolymer:

[0064] Weigh polycarbonate diol and diphenylmethane diisocyanate mixed prepolymerization reaction to prepare polyurethane prepolymer; wherein, the number average molecular weight of polycarbonate diol is 1000-4000; the reaction temperature of prepolymerization 45°C, the reaction time is 1h;

[0065] Step 2, prepare polyurethane elastomer:

[0066] Weigh 4,4-diphenylmethanediamine and 1,4-butanediol according to the amount, firstly mix 4,4-diphenylmethanediamine and polyurethane prepolymer, under the condition of 70~85℃ After stirring and reacting for 0.5-1 hour, add 1,4-butanediol, and then add a catalyst for polymerization reaction to prepare polyurethane elastomer; wherein, the reaction temperature of the polymerization reaction is 70-85°C, and the reaction time is 3-5 hours; The mass ratio of 4,4-diphenylmethan...

Embodiment 3

[0080] A method for preparing an environmentally friendly plastic toy product, comprising the following steps:

[0081] Step 1, prepare polyurethane prepolymer:

[0082] Weigh polycarbonate diol and isophorone diisocyanate mixed prepolymerization reaction to prepare polyurethane prepolymer; wherein, the number average molecular weight of polycarbonate diol is 1000-4000; the reaction temperature of prepolymerization The temperature is 60°C, and the reaction time is 3h;

[0083] Step 2, prepare polyurethane elastomer:

[0084] Weigh 3,5-dimethylthiotoluenediamine and 1,2-propanediol according to the amount, first mix 3,5-dimethylthiotoluenediamine and polyurethane prepolymer, under the condition of 70~85℃ After stirring and reacting for 0.5 to 1 hour, add 1,2-propanediol, and then add a catalyst for polymerization to prepare a polyurethane elastomer; wherein, the reaction temperature of the polymerization reaction is 70°C, and the reaction time is 3 hours; 3,5-dimethyl The ma...

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Abstract

The invention discloses an environment-friendly plastic toy product preparation method, which comprises: 1, preparing a polyurethane prepolymer: weighing polyester polyol and isocyanate according to a certain amount, and carrying out a mixing pre-polymerization reaction to prepare the polyurethane prepolymer; step 2, preparing a polyurethane elastomer: weighing a chain extender according to the amount, uniformly mixing the chain extender with the polyurethane prepolymer, and then adding a catalyst to carry out polymerization reaction, so as to prepare the polyurethane elastomer; step 3, preparing a polyurethane master batch; and 4, injection molding: putting the polyurethane master batch into a charging barrel of an injection molding machine, and carrying out vulcanization molding by using an injection mold to obtain the environment-friendly plastic toy product. A polyurethane environment-friendly material is adopted as a main base material, and the environment-friendly plastic toy material is prepared through a traditional synthesis method. The finally prepared polyurethane keeps good wear resistance and hardness, and the water resistance, the acid and alkali resistance and the aging resistance are also greatly improved.

Description

technical field [0001] The invention relates to the field of environment-friendly materials, in particular to a method for preparing an environment-friendly plastic toy product. Background technique [0002] With the improvement of living standards year by year, the environmental protection requirements for plastic products are also gradually increasing. Green and low carbon has become the consensus of the industry. Export manufacturers must take the initiative to take the lead. In recent years, the number of toy companies owned by my country has shrunk from more than 8,000 to more than 6,000. At home, plastic products that do not meet the requirements will be subject to severe export restrictions. [0003] Plastic toys not only need to meet the requirements of unique shapes, but also need to be able to withstand the test of the environment. Plastic toys made of traditional materials are no longer the main demand in today's market. Only the development and application of new...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L87/00C08H8/00C08F8/32C08F20/56C08G81/02
CPCC08L75/04C08H8/00C08F8/32C08F20/56C08G81/02C08L2201/08C08L87/005
Inventor 钟锦祥张泳高叶长亮钟继曦邱锡珉
Owner 漳平市国联玩具礼品有限公司