Anti-impact material and preparation method thereof

An impact-resistant, polystyrene microsphere technology, applied in the field of polymer materials, can solve the problems of poor impact resistance, inability to protect against impact, and inability to absorb impact energy well, and achieve the effect of excellent impact resistance.

Active Publication Date: 2017-05-31
SHENZHEN ANDY NEW MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Regardless of whether it is a polyurethane elastomer obtained by polymerization of a single type of polyurethane or a combination of appropriate types of polyurethane, at low temperatures, the flexible polyurethane elastomer unit is in a viscoelastic state, so the polyurethane elastomer can absorb Impact energy; however, at high temperatures, the elasticity of polyurethane elastomers is significantly reduced, showing higher viscosity, which cannot absorb impact energy well, that is, at high temperatures, the impact resistance of existing polyurethane elastomers is relatively low. Poor, can not play the role of shock protection

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  • Anti-impact material and preparation method thereof

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preparation example Construction

[0031] see figure 2 , the present invention also provides a kind of preparation method of above-mentioned polyurethane composite material 100, and described preparation method comprises the following steps:

[0032] S1: Synthesis of polyethylene glycol-modified styrene.

[0033] Specifically, in the embodiment of the present invention, the chemical structure of polyethylene glycol-modified styrene is preferably: Further, in the embodiment of the present invention, the polyethylene glycol-modified styrene is prepared by esterifying methyl vinyl benzoate and polyethylene glycol. Specifically, the molar ratio of methyl vinyl benzoate to polyethylene glycol is 0.9:1, adding a small amount of potassium hydroxide as a catalyst, reacting at 60°C for 2-4 hours, distilling under reduced pressure, washing repeatedly, and drying in vacuo A polyethylene glycol-modified styrene monomer is obtained.

[0034] S2: Emulsion polymerizing the polyethylene glycol-modified styrene with unmodi...

Embodiment 1

[0051] Add 100g of methyl vinyl benzoate and 1.5% catalyst KOH into a 500ml three-necked flask, raise the temperature to 60°C, gradually add 400g of polyethylene glycol dropwise to the solution, react for 2 hours, distill under reduced pressure and wash repeatedly, vacuum Dry to obtain polyethylene glycol modified styrene.

[0052] Sodium dodecylsulfonate is used as emulsifier, potassium persulfate is used as catalyst, polyethylene glycol modified styrene and unmodified styrene are emulsion polymerized, each 50g. The mass fraction of the monomer is 5%, the mass fraction of the emulsifier is 0.2%, and the mass fraction of the catalyst is 0.2%. Polyethylene glycol-modified styrene and unmodified styrene were gradually added dropwise to an aqueous solution containing a catalyst and an emulsifier, and reacted at 85° C. for 2 hours to obtain polystyrene microspheres containing polar group terminals.

[0053] Dry 50g of polyethylene glycol in vacuum, add nitrogen into a 250ml three...

Embodiment 2

[0057] Add 100g of methyl vinyl benzoate and 1.5% catalyst KOH into a 500ml three-necked flask, raise the temperature to 60°C, gradually add polyethylene glycol 400 to the solution dropwise, react for 4 hours, distill under reduced pressure and wash repeatedly, vacuum Dry to obtain polyethylene glycol modified styrene.

[0058] Using sodium dodecylsulfonate as an emulsifier and potassium persulfate as a catalyst, 40 g of polyethylene glycol-modified styrene and 60 g of unmodified styrene were emulsion polymerized. The mass fraction of the monomer is 10%, the mass fraction of the emulsifier is 0.2%, and the mass fraction of the catalyst is 0.2%. Polyethylene glycol-modified styrene and unmodified styrene were gradually added dropwise to an aqueous solution containing a catalyst and an emulsifier, and reacted at 60° C. for 2 hours to obtain polystyrene microspheres containing polar group terminals.

[0059] Vacuum dry 50g of polyethylene glycol, add nitrogen into a 250ml three-...

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Abstract

The invention discloses an anti-impact material which comprises a polyurethane elastomer unit and a polystyrene microsphere unit connected through a chemical bond. The invention also provides a preparation method of the anti-impact material. The anti-impact material disclosed by the invention comprises a polyurethane elastomer unit with relatively low glass transition temperature, which can absorb the impact energy at low temperature; meanwhile, the anti-impact material also comprises a polystyrene microsphere unit; and at a high temperature, when the anti-impact material undergoes impact, the impact energy is absorbed by the non-elastic and elastic collision between the polystyrene microsphere units. Thus, excellent impact resistance of the anti-impact material can be kept in a relatively wide temperature spectrum range.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to an impact-resistant material and a preparation method thereof. Background technique [0002] Polyurethane elastomers have been widely used in civil, sports, aerospace and military fields due to their high strength, good wear resistance, oil resistance and oxygen resistance, especially good impact resistance. [0003] Polyurethane elastomers mainly rely on the viscoelasticity of molecular chains to absorb impact energy, so the glass transition temperature of polyurethane has a crucial impact on the impact energy absorption of polyurethane. However, the glass transition temperature of polyurethane is affected by multiple factors, including the chemical structure of soft and hard segments, molecular chain length, molecular weight, etc. Generally speaking, the glass transition temperature of polyether polyurethane is around -60°C, and the glass transition temperature of polyester po...

Claims

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Application Information

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IPC IPC(8): C08G18/63C08G18/48C08G18/34C08G18/66C08F283/06C08F212/08C08F2/26C08G101/00
CPCC08F2/26C08F283/065C08G18/348C08G18/4833C08G18/632C08G18/635C08G18/6692C08G2101/00C08F212/08
Inventor 李常胜王纲王晶秦毅
Owner SHENZHEN ANDY NEW MATERIAL TECH CO LTD
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