Preparation method for environment-friendly, flame-retardant and soft polyurethane foaming plastic
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A technology of soft polyurethane and foam plastics, applied in the field of polyurethane foam plastics
Inactive Publication Date: 2014-01-01
NANJING NIANJI REFRIGERATION FOOD
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Abstract
Description
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Problems solved by technology
The effect of this type of flame retardant needs to be further improved, and the price is relatively expensive, which limits the application of polyurethane foam to a certain extent
The development of flame retardant technology and flame retardants in my country is relatively slow. Most of the flame retardant polyurethane foams currently produced in my country use liquid halogen-containing phosphates as flame retardants. The flame retardant efficiency of such flame retardants is not satisfactory. The amount of smoke and toxic and corrosive gaseous products generated during combustion are more, which is not friendly to the environment
Method used
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Examples
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Effect test
Embodiment 1
[0015] Add metered polytetrahydrofuran (320.0kg), octyltin (1.3kg), p-toluenesulfonic acid (1.0kg), melamine (50.0kg), N,N-dimethylethanolamine (5.8kg) in the reaction kettle, The kettle is filled with nitrogen, heated at 40~60°C, fully stirred for 3~5 hours, cooled to 20°C, and polyisocyanate (100.0kg) and silicone oil aminoethyliminopropylpolysiloxane were added to the product obtained above (5.0kg), diethylamine (3.2kg), water (2.3kg), stir at high speed until foaming, when a large amount of white foam appears, pour it into the mold immediately, and mature at 40~60°C for 120 minutes, After demoulding, soft polyurethane foam plastic products are obtained.
Embodiment 2
[0017] Add metered polytetrahydrofuran (320.0kg), octyltin (1.3kg), p-toluenesulfonic acid (1.0kg), melamine (38.0kg), N, N-dimethylethanolamine (5.8kg) in the reaction kettle, Fill the kettle with nitrogen, heat at 40~60°C, stir thoroughly for 3~5 hours, cool down to 20°C, add polyisocyanate (120.0kg) to the product obtained above, silicone oil aminoethyliminopropylpolysiloxane (5.0kg), diethylamine (3.2kg), water (2.0kg), stir at high speed until foaming, when a large amount of white foam appears, pour it into the mold immediately, and mature at 40~60°C for 120 minutes, After demoulding, soft polyurethane foam plastic products are obtained.
Embodiment 3
[0019] Add metered polytetrahydrofuran (320.0kg), octyltin (1.3kg), p-toluenesulfonic acid (1.0kg), melamine (30.0kg), N,N-dimethylethanolamine (5.8kg) in the reaction kettle, Fill the kettle with nitrogen, heat at 40~60°C, stir thoroughly for 3~5 hours, cool down to 20°C, add polyisocyanate (150.0kg) to the product obtained above, silicone oil aminoethyliminopropylpolysiloxane (5.0kg), diethylamine (3.2kg), water (2.0kg), stir at high speed until foaming, when a large amount of white foam appears, pour it into the mold immediately, and mature at 40~60°C for 120 minutes, After demoulding, soft polyurethane foam plastic products are obtained.
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Abstract
The invention discloses a preparation method for an environment-friendly, flame-retardant and soft polyurethane foaming plastic. The preparation method is characterized by comprising the following technological steps: a, adding weighed polytetrahydrofuran, octyl tin at catalytic amount, p-Methylbenzene sulfonic acid, melamine, and N,N-dimethylethanolamine into a reaction kettle which is filled with nitrogen or an inert gas; heating to 40-60 DEG C, mixing for 3-5 h, and cooling to 20 DEG C; b, adding polyisocyanate, silicone oil, diethylamine, and proper amount of water into the product obtained in the step a; mixing at a high speed for foaming; c, when huge amount of white bubbles are generated, injecting the mixture into a mold, curing at 40-60 DEG C for 60-150 min, and demolding, so as to obtain soft polyurethane foaming plastic product. The polyurethane soft foaming plastic has the following advantages: low fume, low toxicity, good smoke retardance property, good long-term stability, convenient production technology, relatively low cost, and suitability for industrial production.
Description
technical field [0001] The invention belongs to the field of polyurethane foam plastics, and in particular relates to a preparation method of a novel environment-friendly flame-retardant flexible polyurethane foam plastic. Background technique [0002] In order to improve the flame retardancy of foamed plastics, flame retardants are usually added to the foaming formula when preparing polyurethane foamed plastics in industry, so as to delay burning, block smoke and make the fire parts self-extinguish, so that polyurethane foamed plastics have certain fire resistance. flammability. In addition, polyols containing flame retardant elements (that is, reactive flame retardants) can also be used as foam raw materials. Reactive flame retardants participate in the reaction as a reactive component, so that polyurethane itself contains flame retardant components, which have an impact on material properties. However, the introduction of reactive flame retardants has the disadvantages o...
Claims
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Application Information
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