Plant-oil-based asphalt modifier, modified asphalt containing modifier and preparation of plant-oil-based asphalt modifier

A kind of asphalt modifier, vegetable oil-based technology, applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of single composition, low modification equipment requirements, etc., achieve low production cost, reduce additives and additives Dosage, to improve the effect of low temperature brittleness

Active Publication Date: 2016-11-23
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modifier and modified asphalt have a single composition, the preparation method is simple and safe, and the require

Method used

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  • Plant-oil-based asphalt modifier, modified asphalt containing modifier and preparation of plant-oil-based asphalt modifier
  • Plant-oil-based asphalt modifier, modified asphalt containing modifier and preparation of plant-oil-based asphalt modifier

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1:

[0041] The formula of vegetable oil-based polyurethane modifier is as follows:

[0042] Calculate the corresponding amount of liquefied diphenylmethane diisocyanate (MDI-100LL, produced by Yantai Wanhua Company, free NCO content of 28-30%) according to the isocyanate index R (NCO / OH) of 1.8, and the corresponding amount of castor oil polyol (Sinopharm Group, AR, hydroxyl value is 164mgKOH / g), polymerization inhibitor orthophosphoric acid which accounts for 1% of the total mass of liquefied MDI and castor oil polyol, acetone solvent which accounts for 8% of the total reactant volume: In order to adjust the system viscosity, 8% of the total solvent volume is added in step 1), and 10% and 82% are added in step 2) and step 3).

[0043] Dehydration of vegetable oil polyols: The castor oil polyols are dehydrated for 2 hours under a vacuum of 0.1MPa and 110°C, and then cooled to room temperature under vacuum.

[0044] The preparation method is:

[0045] 1) Add 1% of the t...

Example Embodiment

[0050] Example 2

[0051] The formula of the modifier in this embodiment is as follows:

[0052] Calculate the corresponding amount of liquefied diphenylmethane diisocyanate (MDI-100LL, produced by Yantai Wanhua Company, with a free NCO content of 28-30% by mass) according to the isocyanate index R (NCO / OH) of 1.6, and the corresponding amount of castor oil Polyol (China National Pharmaceutical Group, AR, hydroxyl value 164mgKOH / g), 1% of the total mass of castor oil polyol and liquefied MDI, orthophosphoric acid, 7% acetone solvent of the total reactant volume adjusts the system viscosity. In order to adjust the system viscosity, 5% of the total solvent volume is added in step 1), and 10% and 85% are added in step 2) and step 3).

[0053] The amount of free NCO groups in the liquefied MDI exceeds the amount of active hydrogen contained in the hydroxyl groups in castor oil by 60%.

[0054] The dehydration steps for preparing vegetable oil-based polyurethane modifier and vegetable oil...

Example Embodiment

[0057] Example 3

[0058] The formula of the modifier in this embodiment is as follows:

[0059] Calculate the corresponding amount of liquefied diphenylmethane diisocyanate (MDI-100LL, produced by Yantai Wanhua Company, free NCO content of 28-30%) according to the isocyanate index R (NCO / OH) of 1.6, and the corresponding amount of castor oil polyol (Sinopharm Group, AR, hydroxyl value is 164mgKOH / g), 1% of the total mass of the polymerization inhibitor orthophosphoric acid, 15.8% of the total reactant volume is used to adjust the system viscosity, in which the free NCO group in the liquefied MDI The amount of the mass of the substance is 60% excess relative to the amount of the active hydrogen contained in the hydroxyl group in the castor oil.

[0060] The dehydration steps for preparing vegetable oil-based polyurethane modifier and vegetable oil polyol are the same as in Example 1.

[0061] Wherein, the isocyanate index in step 1) is R=1.6, and the incubation reaction in step 3) is...

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Abstract

The invention discloses a plant-oil-based polyurethane modifier, modified asphalt and a preparation method of the plant-oil-based asphalt modifier. According to the plant-oil-based polyurethane modifier, dehydrated plant oil polyalcohol replaces petroleum-based polyalcohol to serve as a polyhydroxy component, the polyhydroxy component is added into a polyisocyanate component at the temperature of 25-35 DEG C, the index R of isocyanate ranges from 1.4 to 1.8, the temperature is raised to 40-50 DEG C after the polyhydroxy component is added, a heat preservation reaction is carried out for 1.5-3 h, a solvent with the volume accounting for 5-50% of the total volume of the reactant is added in the reaction process to adjust the system viscosity, and a series of plant-oil-based polyurethane prepolymers with different condensation degrees are prepared. The synthesis degree of the prepolymers is controlled, the prepolymers are added into matrix asphalt, and the modified asphalt containing plant-oil-based polyurethane is prepared. The asphalt modifier is low in viscosity and good in fluidity, and is easily dispersed in asphalt, the temperature needed by the shear process is low, time is short, the prepared plant-oil-based polyurethane modifier is environmentally friendly and renewable, and the obtained modifier asphalt is simple in ingredient and excellent in high and low temperature performance.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a high molecular polymer asphalt modifier, modified asphalt and a preparation method thereof. Background technique [0002] Polyurethane is a general term for macromolecular compounds containing repeated carbamate groups on the main chain. Polyurethane materials can be well dispersed in asphalt to form an elastic network structure, thereby modifying asphalt. Polyurethane modified asphalt has good low temperature performance, water resistance and chemical resistance. [0003] For example, the patent CN 102464892 A discloses a modifier for road asphalt, which uses a compound isocyanate material to form a polyurethane structure with the base asphalt through a chemical reaction to improve the performance of the base asphalt. The modifier can improve the softening point of base asphalt to about 70°C, and the ductility at 5°C to more than 20cm. The obtained modified asphalt...

Claims

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Application Information

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IPC IPC(8): C08G18/36C08L75/04C08L95/00
Inventor 曹东伟张海燕夏磊陈艳巨
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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