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Plasticizer-free low-hardness high-fracture-elongation-rate polyurethane elastomer material composition and preparation method thereof

A technology of polyurethane elastomer and elongation at break, which is applied to the composition and preparation field of two-component room temperature-curing polyurethane elastomer, can solve the problems of non-resistance to solvents, inability to meet the elongation at break and the like, and achieves The effect of high elongation at break, safety and environmental protection mechanical properties and process performance, and great economic significance

Active Publication Date: 2018-02-13
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] CN103408719A discloses a low-hardness solvent-resistant polyurethane elastomer and a preparation method thereof, aiming to solve the problem of solvent-resistant products in printing fields such as color coating
Although this patent meets the low hardness without the addition of plasticizer, the elongation at break is between 400% and 700%, which cannot meet the requirement of elongation at break greater than 1000%.

Method used

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  • Plasticizer-free low-hardness high-fracture-elongation-rate polyurethane elastomer material composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A component: polyol component: obtained according to the following preparation method: in parts by weight, polypropylene oxide ether polyol (CHE-824) 50 with a molecular weight of 7000, and a polypropylene oxide-ethylene oxide with a molecular weight of 8000 Copolyether polyol (CHE-280) 50, chain extender 1, 4-BDO 3.48, ultraviolet absorber UV-531 0.5, catalyst mercuric isooctanoate 0.05, catalyst A330.05, antioxidant 1010 0.5, defoamer BYK -A550 0.6, mix and stir at 100±10°C, vacuum degree -0.1MPa, and vacuumize.

[0049] Component B: Isocyanate component: Obtained according to the following preparation method: In weight percentage, 82.4% of polypropylene oxide-ethylene oxide copolyether polyol (CHE-280) with 2 functionalities and a molecular weight of 8000, diphenyl Methane diisocyanate (MDI-100) 16.7%, carbodiimide modified diphenylmethane diisocyanate (MDI-100LL) 0.9%, react at 80°C for 2 to 3 hours to obtain a preform with an isocyanate content of 5%. Polymer.

...

Embodiment 2

[0052] A component: polyol component: obtained according to the following preparation method: in parts by weight, polypropylene oxide ether polyol (CHE-824) 60 with a molecular weight of 7000, and a polypropylene oxide-ethylene oxide with a molecular weight of 8000 Copolyether polyol (CHE-280) 40, chain extender EG 3.52, ultraviolet absorber UV-531 0.5, catalyst mercuric isooctanoate 0.05, catalyst A33 0.05, antioxidant 1010 0.5, defoamer BYK-066N 0.6, in 100±10°C, mixing, stirring and vacuuming at a vacuum degree of -0.1MPa.

[0053] Component B: Isocyanate component: Obtained according to the following preparation method: In weight percentage, 82.4% of polypropylene oxide-ethylene oxide copolyether polyol (CHE-280) with 2 functionalities and a molecular weight of 8000, diphenyl Methane diisocyanate (MDI-100) 16.7%, carbodiimide modified diphenylmethane diisocyanate (MDI-100LL) 0.9%, react at 80°C for 2 to 3 hours to obtain a preform with an isocyanate content of 5%. Polymer...

Embodiment 3

[0056] A component: polyol component: obtained according to the following preparation method: in parts by weight, polypropylene oxide ether polyol (CHE-824) 60 with a molecular weight of 7000, and a polypropylene oxide-ethylene oxide with a molecular weight of 8000 Copolyether polyol (CHE-280) 40, chain extender EG 3.28, ultraviolet absorber UV-531 0.5, catalyst mercuric isooctanoate 0.05, catalyst A33 0.05, antioxidant 1010 0.5, at 100±10°C, vacuum degree- Stirring and vacuuming at 0.1MPa.

[0057] Component B: Isocyanate component: Obtained according to the following preparation method: In weight percentage, 82.4% of polypropylene oxide-ethylene oxide copolyether polyol (CHE-280) with 2 functionalities and a molecular weight of 8000, diphenyl Methane diisocyanate (MDI-100) 16.7%, carbodiimide modified diphenylmethane diisocyanate (MDI-100LL) 0.9%, react at 80°C for 2 to 3 hours to obtain a preform with an isocyanate content of 5%. Polymer.

[0058] The isocyanate component...

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Abstract

The invention provides a plasticizer-free low-hardness high-fracture-elongation-rate polyurethane elastomer material composition. A prepolymer obtained through the reaction of polyoxypropylene ether polyalcohol and methyl diphenylene diisocyanate is used as one ingredient; polyether polyol, alcohol chain extenders, catalysts, anti-aging agents and other ingredients form a polymer polyalcohol ingredient; the two ingredients are mixed at the normal temperature, and are cast and cured to obtain the polyurethane elastomer material. Compared with the existing low-hardness polyurethane elastomer product, the plasticizer-free low-hardness high-fracture-elongation-rate polyurethane elastomer material composition has the advantages that no plasticizer ingredient exists in the recipe; the problems of plasticizer removal and the like are solved; meanwhile, the requirements of the fracture elongation rate being greater than 1000 percent and the hardness being lower than ShaoA30 can be met; good physical and mechanical properties can be maintained.

Description

technical field [0001] The invention belongs to a polyurethane elastomer and a preparation method thereof, in particular to a composition of a two-component room-temperature-curable polyurethane elastomer without plasticizer, low hardness, and high elongation at break and a preparation method thereof. Background technique [0002] Polyurethane is a polymer synthetic material with properties between rubber and plastic. It is characterized by a wide range of adjustment of hardness and elongation at break. It can have both the elasticity of rubber and the hardness of plastic. The low Hard polyurethane elastomers are mostly obtained by adding a large amount of plasticizers. After such products are placed for a period of time, the plasticizers tend to migrate and precipitate to the surface, resulting in a decrease in product performance. [0003] Existing technology such as patent CN103992633A discloses a polyurethane caulking material for high-speed railway ballastless track exp...

Claims

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Application Information

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IPC IPC(8): C08G18/79C08G18/76C08G18/66C08G18/48C08G18/32C08G18/10
CPCC08G18/10C08G18/4812C08G18/4825C08G18/4829C08G18/725C08G18/7671C08G18/797C08G2350/00C08G2190/00C08G18/6674C08G18/48C08G18/3206
Inventor 刘锦春方雅茹化雪晴陶帅
Owner QINGDAO UNIV OF SCI & TECH
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