Modified silicone sealant for asphalt pavement crack treatment and preparation method thereof

A technology of asphalt pavement and modified silicon, applied in the field of sealant, can solve the problems that cracks in asphalt pavement cannot be treated, the leveling property of modified silicone sealant and low temperature stretching are not ideal, etc. Improvement, high mechanical strength and bond strength, good compatibility

Active Publication Date: 2021-01-15
CHONGQING ZONJO RENEWABLE RESOURCES DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a modified silicone sealant for treating asphalt pavement cracks and a preparation method thereof, which solves the problem of leveling and cracking of the modified silicone sealant in the prior art. Low temperature stretching is not ideal and cannot be used for crack treatment of asphalt pavement

Method used

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  • Modified silicone sealant for asphalt pavement crack treatment and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The invention provides a modified silicone sealant for crack treatment of asphalt pavement, which is specifically prepared through the following steps:

[0019] Step 1: Preparation of modified polyurethane prepolymer raw materials

[0020] Step A1: Preparation of organic modified nano-ion Ⅰ

[0021] S1: In parts by weight: Weigh 10 parts of calcium carbonate inorganic nano filler particles, 30 parts of sodium methoxide solution, and 35.3 parts of ethylene glycol, and set aside;

[0022] S2: Add the calcium carbonate inorganic nano-filler particles and sodium methoxide solution weighed in step S1 into the reactor, and control the reactor to stir for 50 minutes under ultrasonic conditions at normal temperature and pressure to obtain preliminary modified particles;

[0023] S3: After washing the preliminary modified particles obtained in step S2 with anhydrous methanol for 3 times, drying in the temperature range of 50-70° C. for 30 minutes, grinding and sieving to obtain...

Embodiment 2

[0046] The invention provides a modified silicone sealant for crack treatment of asphalt pavement, which is specifically prepared through the following steps:

[0047] Step 1: Preparation of modified polyurethane prepolymer raw materials

[0048] Step A1: Preparation of organic modified nano-ion Ⅰ

[0049] S1: In parts by weight: Weigh 13 parts of fly ash inorganic nano filler particles, 36 parts of sodium ethoxide solution, and 42 parts of glycidol, and set aside;

[0050] S2: Add the fly ash inorganic nano-filler particles and sodium alkoxide solution weighed in step S1 into the reactor, and control the reactor to stir for 55 minutes under ultrasonic conditions at normal temperature and pressure to obtain preliminary modified particles;

[0051] S3: After washing the preliminary modified particles obtained in step S2 with anhydrous methanol for 3 times, drying in the temperature range of 50-70° C. for 33 minutes, grinding and sieving to obtain the first pretreated product w...

Embodiment 3

[0074] The invention provides a modified silicone sealant for crack treatment of asphalt pavement, which is specifically prepared through the following steps:

[0075] Step 1: Preparation of modified polyurethane prepolymer raw materials

[0076] Step A1: Preparation of organic modified nano-ion Ⅰ

[0077] S1: in parts by weight: weigh 15 parts of calcium carbonate inorganic nano filler particles, 40 parts of sodium methoxide solution, and 45 parts of propylene glycol, and set aside;

[0078] S2: Add the calcium carbonate inorganic nano-filler particles and sodium methoxide solution weighed in step S1 into the reactor, and control the reactor to stir for 60 minutes under ultrasonic conditions at normal temperature and pressure to obtain preliminary modified particles;

[0079] S3: After washing the preliminary modified particles obtained in step S2 with anhydrous methanol for 3 times, drying in the temperature range of 50-70° C. for 25 minutes, grinding and sieving to obtain ...

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Abstract

The invention provides a modified silicone sealant for asphalt pavement crack treatment, which comprises the following components in parts by weight: 10-30 parts of modified polyurethane prepolymer, 10-30 parts of modified acrylic resin prepolymer, 50-70 parts of silicone sealant, 2-4 parts of dimethyl silicone oil, 3-8 parts of coupling agent, 2-4 parts of hydroxyl radical scavenger and 2-4 partsof cross-linking agent. The compatibility between the modified polyurethane prepolymer, the modified acrylic acid prepolymer and the silicone sealant is better, so that the polyurethane prepolymer and the acrylic acid prepolymer can be better modified and added into the silicone sealant, and the polyurethane prepolymer and the acrylic acid prepolymer can be uniformly and stably dispersed in a reaction system; and the binding force between the rubber materials is improved, so that the elongation, the low-temperature tensile strength and the storage stability of the rubber body are improved, and the modified silicone sealant provided by the invention can be effectively used for treating asphalt pavement cracks.

Description

technical field [0001] The invention belongs to the technical field of sealants, and in particular relates to a modified silicone sealant used for treating asphalt pavement cracks and a preparation method thereof. Background technique [0002] Sealants are mainly divided into five categories, 1. Silicone sealant: sealant based on organosiloxane liquid silicone rubber; 2. Polyurethane sealant: sealant based on polymer reacted with diisocyanate and polyether polyol 3. Polysulfide sealant: sealant based on liquid polysulfide rubber; 4. Acrylic sealant: sealant based on polyacrylate resin 5. Chlorosulfonated polyethylene building sealant: chlorine Sulfonated polyethylene is a sealant made by blending and grinding the main rubber with vulcanizing agent, accelerator, softener and filler. [0003] Silicone sealant can be widely used in construction, electronics, aerospace, automobile industry and other industries because of its excellent low temperature resistance and other proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J175/06C09J175/08C09J133/04C09J11/08C09J11/04
CPCC09J183/04C09J11/08C09J11/04C08L2205/035C08L2205/025C08K2201/011C08K2003/265C08K2201/014C08L2201/08C08L75/06C08L33/04C08K9/04C08K9/06C08K3/26C08L75/08C08K7/26C08K3/36
Inventor 达瓦扎西米玛次仁陈先勇谢磊战琦琦田浩张瑜杜姣姣
Owner CHONGQING ZONJO RENEWABLE RESOURCES DEV CO LTD
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