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Synthesis method of high-performance multipurpose urethane elastomer

A technology of polyurethane elastomer and synthesis method is applied in the synthesis field of preparing polyurethane elastomer, which can solve the problems of high price of liquid rubber and single manufacturer, and achieve the effects of high product quality, good comprehensive performance and reasonable process.

Active Publication Date: 2007-02-28
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the particularity of my country's military industry, as well as the high price of liquid rubber and the single manufacturer, it has limited its wide application in civilian fields, such as electrical insulation materials, electronic potting materials, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First prepare the prepolymer (component A): add 1200 g of hydroxyl-terminated polybutadiene-acrylonitrile liquid rubber into a 3-liter three-necked bottle. The average molecular weight of the hydroxyl-terminated polybutadiene-acrylonitrile liquid rubber is 2789, the average functionality is 2.3, the nitrile bonded amount is 16.09%, and the hydroxyl value is 0.4806mmol / g. Heat to 100±5°C, vacuumize for 30 minutes, then cool down to 50°C, add 261 grams of toluene diisocyanate. Heating polymerization temperature is between 90 DEG C, reacts 0.5 hour, cools to 75 DEG C, constant temperature reaction 4.5h, vacuumizes 30min then, obtains the NCO% in the isocyanate-terminated nitrile butadiene liquid rubber prepolymer (component A) to be 5.46, Cool down and discharge.

[0023] Preparation of curing agent (component B): the chain extender adopts N, N bis-2-hydroxypropyl-aniline derivatives, and its consumption is based on the mole of OH (OH is 6.74mmol / g, the same) in the chain...

Embodiment 2

[0026]First prepare the prepolymer (component A): add 1500 g of hydroxyl-terminated polybutadiene liquid rubber into a 3-liter three-necked bottle. The average molecular weight of hydroxyl-terminated polybutadiene liquid rubber is 3715, the average functionality is 2.1, and the hydroxyl value is 0.4914mmol / g. Heating to 102°C, vacuuming for 50 minutes, then cooling down to 50°C, adding 432 grams of toluene diisocyanate. Heating polymerization temperature is between 85 DEG C, reacts 1 hour, cools down to 80 DEG C, constant temperature reaction 3.5h, vacuumizes 30min then, obtains NCO% in the isocyanate-terminated nitrile butadiene liquid rubber prepolymer (component A) is 9.56, Cool down and discharge.

[0027] Preparation of curing agent (component B): the chain extender adopts the derivative of N, N bis-2-hydroxypropyl-aniline, and its consumption is based on the molar ratio of OH in the chain extender to the NCO in the terminal isocyanate group prepolymer. 0.095. The cros...

Embodiment 3

[0030] First prepare the prepolymer (component A): add 1300 g of polytetrahydrofuran ether glycol into a 3-liter three-necked bottle. Polytetrahydrofuran ether glycol has an average molecular weight of 890, an average functionality of 2.9, and a hydroxyl value of 1.5993 mmol / g. Heating to 105°C, vacuuming for 50 minutes, then cooling down to 50°C, adding 441 grams of toluene diisocyanate. Heating polymerization temperature is between 95 DEG C, reacts 0.5 hour, cools to 80 DEG C, constant temperature reaction 2.5h, vacuumizes 30min then, obtains NCO% in the isocyanate-terminated nitrile butadiene liquid rubber prepolymer (component A) is 5.98, Cool down and discharge.

[0031] Preparation of curing agent (component B): the chain extender adopts the derivative of N, N bis-2-hydroxypropyl-aniline, and its consumption is based on the molar ratio of OH in the chain extender to the NCO in the terminal isocyanate group prepolymer. 0.1. The cross-linking agent adopts 4-methyl-2.6-d...

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Abstract

The invention discloses a synthetic method to prepare polyurethane elastic body with hydroxyl-ended oligomer polyol as raw material, which is characterized by the following: reacting hydroxy-terminated liquid rubber or poly-tetrahydropyran ether alcohol with polyisocyanates; getting end isocyanate group pie polymer in fixing reacting time, temperature; giving in A component; compositing chain-extending agent, flux, antiager with gallant; getting curative; giving in B component; hardening A component and B component under indoor temperature proportional mixing; getting high-performance multipurpose polyurethane elastic body; The stretching intensity is: 10.0-47.0Mpa, splitting extensibility>300%, 300% load at certain intensity: 5.0-35.0Mpa.

Description

technical field [0001] The invention relates to a synthetic method for preparing polyurethane elastomer by using hydroxyl-terminated oligomer polyol as raw material. React hydroxyl-terminated liquid rubber or polytetrahydrofuran ether alcohol with polyisocyanate to prepare isocyanate-terminated prepolymer at specified reaction time and temperature, which is component A; use chain extender, solvent, anti-aging agent and cross-linking agent Combined with the agent to obtain the curing agent, which is the B component; the A component and the B component are mixed in proportion and cured at room temperature to obtain a high-performance multi-purpose polyurethane elastomer. Background technique [0002] At present, polyurethane elastomer is a kind of multi-block macromolecular substance. Because its macromolecular chain contains strong polar urethane type hard segment, it also contains extremely flexible polyester or polyether type soft segment. , making it a thermoplastic elast...

Claims

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Application Information

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IPC IPC(8): C08G18/32C08G18/10C08G101/00
Inventor 于晶胡少坤张凤英齐永新潘广勤胡开放陈继明
Owner BC P INC CHINA NAT PETROLEUM CORP
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