Slow-recovery polyether polyol and preparation method thereof and slow-recovery foam and preparation method thereof

A technology of slow rebound polyether and polyether polyol, which is applied in the field of organic polymer synthesis, can solve the problems of no moist comfort, slow foam curing speed, and difficult adjustment of formula, so as to achieve good foam opening and improve Foam has good low-temperature flexibility and tensile tear performance

Inactive Publication Date: 2016-02-10
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the raw materials for preparing slow rebound foam are mainly combined with some high-activity polyether and small molecule slow rebound polyether. The prepared slow rebound foam has serious closed cells and strong shrinkage. Therefore, some slow rebound polyethers must be added to the formula. A special cell opener for rebound, and the density of the prepared slow rebound foam is relatively high, about 70-80kg / m 3 , the hand feeling is relatively rough, and there is no moist and comfortable feeling. The resilience and hardness of the slow rebound foam prepared therefrom change greatly with the temperature: when the temperature decreases, the hardness of the foam will rise sharply, and the low temperature performance is poor; at the same time It is not easy to adjust the formula when using this method to prepare slow rebound foam, the foam curing speed is slow, and the mold opening time is long, which seriously affects the production efficiency

Method used

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  • Slow-recovery polyether polyol and preparation method thereof and slow-recovery foam and preparation method thereof
  • Slow-recovery polyether polyol and preparation method thereof and slow-recovery foam and preparation method thereof
  • Slow-recovery polyether polyol and preparation method thereof and slow-recovery foam and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Slow resilience polyether polyol is a copolymer of propylene oxide and ethylene oxide with glycerol and sucrose as the initiator, wherein, in the polymerized monomer, propylene oxide accounts for 50wt%, and ethylene oxide accounts for 50wt% %.

[0036] The preparation method is as follows:

[0037] (1) Add 920g of glycerol, 142.5g of sucrose and 22.5g of KOH to the pressure-resistant reactor, and replace with nitrogen 3 times. After measurement, the oxygen content is 45ppm, and the temperature is raised to 100°C, vacuumed to -0.092MPa, and dehydrated Reaction 5h;

[0038] (2) Continuously add 3220g of propylene oxide and 3220g of ethylene oxide monomer into the pressure-resistant reaction kettle through a proportional adjustment mixer, and carry out polymerization reaction at 120°C. After the feeding is completed, continue to react for 2h; then vacuumize to -0.092 MPa, remove unreacted residual monomers, cool down to 90°C and transfer to post-treatment tank;

[0039]...

Embodiment 2

[0049] Slow resilience polyether polyol is a copolymer of propylene oxide and ethylene oxide with glycerol and neopentyl glycol as initiators, wherein propylene oxide accounts for 90wt% in the polymerized monomer, and ethylene oxide Alkanes accounted for 10wt%.

[0050] The preparation method is as follows:

[0051] (1) Add 920g of glycerol, 183.5g of neopentyl glycol and 20g of KOH to the pressure-resistant reactor, and replace it with nitrogen 4 times. It is measured that the oxygen content is 40ppm, the temperature is raised to 110°C, and the vacuum is pumped to -0.092MPa , dehydration reaction 7h;

[0052] (2) Continuously add 4997g of propylene oxide and 560g of ethylene oxide monomer into the pressure-resistant reaction kettle through the proportional adjustment mixer, and carry out polymerization reaction at 125°C. After the feeding is completed, continue to react for 2h; then vacuumize to -0.092 MPa, to remove unreacted residual monomers, cool down to 85°C and transf...

Embodiment 3

[0064] Slow resilience polyether polyol is a copolymer of propylene oxide and ethylene oxide with trimethylolpropane and sorbitol as the initiator, wherein propylene oxide accounts for 70wt% in the polymerized monomer, and epoxy Ethane accounts for 30 wt%.

[0065] The preparation method is as follows:

[0066] (1) Add 1340g of trimethylolpropane, 130g of sorbitol and 17.6g of NaOH into the pressure-resistant reactor, and replace it with nitrogen for 5 times. After measurement, the oxygen content is 28ppm, heat up to 110°C, and evacuate to -0.092MPa , dehydration reaction 8h;

[0067] (2) Continuously add 3100g of propylene oxide and 1300g of ethylene oxide monomer into the pressure-resistant reaction kettle through the proportional adjustment mixer, and carry out polymerization reaction at 130°C. After the feeding is completed, continue to react for 2h; then vacuumize to -0.092 MPa, to remove unreacted residual monomers, cool down to 80°C and transfer to post-treatment tank...

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Abstract

The invention relates slow-recovery polyether polyol and a preparation method thereof and slow-recovery foam and a preparation method thereof, and belongs to the technical field of organic polymer synthesis. The slow-recovery polyether polyol is a copolymer of propylene epoxide and ethylene oxide, and the copolymer takes a composite small-molecular-weight polyhydric alcohol compound as initiator. The preparation method of the slow-recovery polyether polyol comprises the steps that the composite small-molecular-weight polyhydric alcohol compound and a catalyst are reacted in a pressure-proof reaction kettle, a polymeric monomer, water, phosphoric acid and magnesium silicate are sequentially added for reaction, and the slow-recovery polyether polyol is obtained; the slow-recovery foam is prepared from a component A and a component B, wherein the component A is prepared from polyether polyol, a composite catalyst, silicone oil and a foaming agent, and the component B adopts modified DMI; the preparation method of the slow-recovery foam comprises the steps that the component A and the component B are evenly mixed and poured into a mold for curing, and the slow-recovery foam is obtained. The slow-recovery foam material has the advantages of being extremely low in depression residue, good in tensile property and capable of reducing the usage amount of an opening agent.

Description

technical field [0001] The invention relates to a slow-rebound polyether polyol and a preparation method thereof, a slow-rebound foam and a preparation method thereof, and belongs to the technical field of organic polymer synthesis. Background technique [0002] Slow resilience foam, also known as viscoelastic foam or memory foam, is widely used in furniture and bedding as shock absorbers, sound absorbers, and shock absorbers because of its shape memory, energy absorption, sound absorption, and shock absorption. , auto parts, sports equipment, medical equipment and other fields. When slow-rebound foam is used as the seat material and cushion, the body pressure is distributed more evenly, which can reduce fatigue and the displacement of the bottom surface. At present, the raw materials for preparing slow rebound foam are mainly combined with some high-activity polyether and small molecule slow rebound polyether. The prepared slow rebound foam has serious closed cells and str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/48C08G101/00
Inventor 孙兆任刘军王玉周玉波
Owner SHANDONG INOV NEW MATERIALS CO LTD
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