Special two-component caulking waterproof sealant for railway ballastless track and preparation method thereof

A waterproof sealing, two-component technology, used in the field of sealants, can solve the problems of limited application, foaming of the rubber layer, health hazards, etc., and achieve the effect of excellent mechanical properties

Active Publication Date: 2021-06-29
陕西杨凌磐基新材料科技有限公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But polyurethane itself has many disadvantages
For example, the high temperature and high humidity environment is likely to cause foaming of the adhesive layer; for the NCO-terminated prepolymer, because it is very sensitive to moisture, the storage stability is very poor, and it will be cross-linked and solidified when it is exposed to the air for a long time. Secondly, the heat resistance of polyurethane sealant is poor; it is easy to disengage from the bonding surface with concrete at low temperature; it is easy to disengage from the bonding surface under dynamic load and cannot be bonded at the wet interface; in addition, the polyurethane sealant Large-scale use will bring many environmental problems and cause great harm to human health
The various deficiencies of the above-mentioned polyurethane sealant limit its application

Method used

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  • Special two-component caulking waterproof sealant for railway ballastless track and preparation method thereof
  • Special two-component caulking waterproof sealant for railway ballastless track and preparation method thereof
  • Special two-component caulking waterproof sealant for railway ballastless track and preparation method thereof

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Experimental program
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preparation example Construction

[0051] The preparation method of the modified nanometer light calcium carbonate comprises: adding hydroxyl silicone oil into ethanol and mixing evenly, then adding nanometer light calcium carbonate, ultrasonic treatment for 1-2 hours, taking out and drying to obtain the product.

[0052] Preferably, the preparation method of the modified nano light calcium carbonate comprises: adding hydroxy silicone oil into ethanol and mixing evenly, then adding nano light calcium carbonate, ultrasonic treatment for 1.5 hours, taking out, and drying to obtain the product.

[0053] Preferably, the raw materials for preparing the modified nano light calcium carbonate also include 3-isocyanatopropyl triethoxysilane; further preferably, the nano light calcium carbonate, hydroxyl silicone oil, 3-isocyanato propyl The weight ratio of triethoxysilane and ethanol is 1: (0.05~0.25): (0.02~0.1): 10; the hydroxyl content of the hydroxy silicone oil is 11wt%; more preferably, the nano light calcium carbo...

Embodiment 1

[0086] Embodiment 1 of the present invention provides a kind of two-component caulking waterproof sealant for railway ballastless track, by weight, the preparation raw material of described A component comprises 25 parts of polyether triols, 10 parts Polyether diol-1, 15 parts of polyether diol-2, 5 parts of aromatic diisocyanates; by weight, the raw materials for the preparation of the second component include 45 parts of polyether diol-3, 20 part of filler, 0.01 part of organotin catalyst; in parts by weight, the raw materials for the preparation of the primer include 35 parts of crosslinking agent, 1 part of water remover and 40 parts of plasticizer.

[0087] The number average molecular weight of the polyether trihydric alcohol is 5000, purchased from Shandong Bluestar Dongda Co., Ltd., model: 10LD76E; the number average molecular weight of the polyether diol-1 is 3000, purchased from Shandong Bluestar Dongda Co., Ltd. Large Co., Ltd., model: DL-3000D; the number average m...

Embodiment 2

[0091] Embodiment 2 of the present invention provides a kind of two-component caulking waterproof sealant for railway ballastless track. Polyether diol-1, 33 parts of polyether diol-2, 20 parts of aromatic diisocyanates; by weight, the raw materials for the preparation of the B component include 78 parts of polyether diol-3, 35 parts part of filler, 0.1 part of organotin catalyst; in parts by weight, the raw materials for the preparation of the primer include 55 parts of crosslinking agent, 5 parts of water removing agent and 60 parts of plasticizer.

[0092]The number average molecular weight of the polyether trihydric alcohol is 5000, purchased from Shandong Bluestar Dongda Co., Ltd., model: 10LD76E; the number average molecular weight of the polyether diol-1 is 3000, purchased from Shandong Bluestar Dongda Co., Ltd. Large Co., Ltd., model: DL-3000D; the number average molecular weight of polyether diol-2 is 2000, purchased from Shandong Bluestar Dongda Co., Ltd., model: DL-...

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Abstract

The invention relates to the field of sealants, and more particularly, to a two-component caulking waterproof sealant for railway ballastless tracks and a preparation method thereof. A first aspect of the present invention provides a two-component caulking waterproof sealant, the two-component caulking waterproof sealant includes a component A, a component B and a primer; in parts by weight, the a The components include 25-50 parts of polyether triol, 10-20 parts of polyether diol-1, 15-40 parts of polyether diol-2, and 5-20 parts of aromatic diisocyanate; by weight , the B component includes 40-80 parts of polyether diol-3, 0.01-0.1 parts of organic tin catalyst; by weight, the primer includes 35-55 parts of cross-linking agent. The two-component caulking waterproof sealant provided by the invention does not contain white oil, asphalt, waste rubber and solvent, is odorless, non-toxic, environmentally friendly and ecological, and is suitable for use as a special caulking material for railway ballastless tracks, and is also suitable for large dynamic loads. concrete structure expansion joints, deformation joints, construction joints, structural joints, settlement joints.

Description

technical field [0001] The invention relates to the field of sealant, more specifically, the invention relates to a special two-component caulking waterproof sealant for railway ballastless track and a preparation method thereof. Background technique [0002] Ballastless track refers to the track structure that uses concrete, asphalt mixture, etc. to replace the loose-grained gravel track bed as a whole, also known as ballastless track, which is an advanced track technology in the world today. Compared with the ballasted track, the ballastless track avoids ballast splashing, has good smoothness, good stability, long service life, good durability, less maintenance work, and the train running speed can reach more than 350 kilometers per hour. [0003] Sealant is a material used to fill the configuration gap to achieve sealing effect. It can deform with the shape of the sealing surface and is not easy to flow. [0004] Since the emergence of polyurethane in the 1940s, its prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C08G18/48
CPCC08G18/4812C09J175/08
Inventor 张会仙张岷江万红李粮余徐凌雁王森荣马仁林
Owner 陕西杨凌磐基新材料科技有限公司
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