Polyurethane and process for preparing nano composite materials thereof

A technology of nanocomposite materials and polyurethane, which is applied in the field of preparation of polyurethane and its nanocomposite materials, can solve the problems of complex process, high manufacturing cost and long reaction time, and achieve the effect of simple operation, shortened reaction time and good gloss performance

Inactive Publication Date: 2005-09-07
江苏舜天新盈轻工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is to overcome the disadvantages of traditional kettle-type polymerization to prepare polyurethane and its composite materials, such as high manufacturing cost, complicated process, and long reaction time, and provide a cost-saving, simple and fast thermal differential front-end polymerization method, Used in the preparation of polyurethane and its nanocomposites

Method used

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  • Polyurethane and process for preparing nano composite materials thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 2.3g of TDI, 10g of propylene glycol polyoxypropylene ether, 0.45g of 1,4-butanediol and 1.5g of toluene are stirred in the presence of 0.07g of stannous octoate, then quickly poured into the reactor, as figure 1 As shown, use a heater such as an electric rod to heat the above system for a short time at the upper end of the liquid in the reactor for 50 seconds at a heating temperature of 110°C, then stop heating, and complete the monomer polymerization by means of the heat self-catalysis of the exothermic reaction, that is, the front-end polymerization reaction , the aggregation direction is as figure 1 As shown in the direction of the middle arrow, a polyurethane material was prepared. The glass transition temperatures determined for this material are listed in Table 1.

Embodiment 2

[0032] 0.25g nano-SiO 2 The powder is pre-dispersed with 2.3g of TDI, 10g of propylene glycol polyoxypropylene ether, 0.45g of 1,4-butanediol and 1.5g of toluene in the presence of 0.07g of stannous octoate, stir well and quickly pour into the reactor In one end of the reactor, the above system is heated for 50s for a short time, the heating temperature is 110°C, then the heating is stopped, and the monomer polymerization is completed by means of the thermal self-catalysis of the exothermic reaction, and the polyurethane and its components with good stability are prepared. Polyurethane nanocomposites. The glass transition temperatures determined for this material are listed in Table 1.

Embodiment 3

[0034] 0.1g nano-SiO 2 The sol is pre-dispersed with 2.3g of TDI, 10g of propylene glycol polyoxypropylene ether, 0.45g of 1,4-butanediol and 1.5g of toluene in the presence of 0.02g of stannous octoate, and quickly poured into the reactor after stirring In one end of the reactor, the above system is heated for 50s for a short time, the heating temperature is 110°C, then the heating is stopped, and the monomer polymerization is completed by means of the thermal self-catalysis of the exothermic reaction, and the polyurethane and its components with good stability are prepared. Polyurethane nanocomposites. The decomposition temperature measured for this material is listed in Table 1.

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Abstract

The invention relates to the polyurethane and its nanometer composite material and the preparing method, comprising putting the polyisocyanates, oligomer polyhydric alcohol, inorganic nano material, chain-enlarging solvent, catalyst and dissolvant into the reactor promptly after intimate mixing with process for front end polymerization, heating the system at one side of the reactor for a short time, then stopping heating, accomplishing the monomer polymerization by means of thermal autocatalysis of the exothermal reaction and getting the product with good stability. The invention is characterized by the same heat stability compared with the traditional kettle type polymerization process, and the simpler process and the reduced reaction time and an excellent energy-saving reaction pattern.

Description

technical field [0001] The invention relates to a method for preparing polyurethane and its nanocomposite material, in particular to a method for preparing polyurethane and its nanocomposite material by front-end polymerization. Background technique [0002] Polyurethane has become a versatile and fast-growing material in synthetic materials because of its structure, which is easy to design and process. The products made include foam plastics, rubber, coatings, adhesives and other varieties. Polyurethane synthetic materials have superior properties than any other commercial rubber and plastics, such as high elasticity, wear resistance, high strength, oil resistance, acid and alkali resistance, and good adhesive properties. At the same time, polymer-based nano-hybrid materials have been widely used in the research of materials science. For polyether polyurethane, due to its large molecular chain flexibility, small secondary bond force, and insufficient strength, polyurethane ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/08C08K3/00C08L75/04
Inventor 陈苏
Owner 江苏舜天新盈轻工业有限公司
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