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Preparation method of joint sealing material

A technology of sealing material and polyether polyol, which is applied in the field of sealants, can solve problems such as limited application, and achieve the effect of high bonding strength and good caulking performance

Inactive Publication Date: 2016-07-13
SHANXI SIFANG HENGTAI WATERPROOF MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The various deficiencies of the above-mentioned polyurethane sealant limit its application

Method used

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  • Preparation method of joint sealing material

Examples

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Effect test

preparation example Construction

[0031] The technical solution of the present invention is, a kind of preparation method of caulking sealing material, comprises the following steps:

[0032] A material preparation

[0033] 1) Component A: (parts by weight)

[0034] Polyether polyol DL-2000D60-80

[0035] Polyether polyol EP-330N10-30

[0036] Diphenylmethane diisocyanate MDI-5010-20

[0037] 2) Component B: (parts by weight)

[0038] Polyether polyol EP-330N30-60

[0039] Chlorinated Paraffin-5250-60

[0040] Amine Chain Extender (MOCA) 5

[0041] Organometallic Catalyst 1

[0042] Talc powder 80

[0043] Softeners and defoamers14

[0044] b. Preparation

[0045] Add the polyether polyol in component A into the container, stir, heat up to 60-80°C, add MDI-50, heat up to 80°C, react at 80±2°C for 2 hours, and measure the NCO content of the system when it reaches the predetermined value , stop responding. After the reaction is completed, lower the temperature and vacuum defoam for 30 minutes, and di...

Embodiment 1

[0070] Operate according to the steps A, B, D, and E described in the above specific embodiments. in:

[0071] A material preparation

[0072] 1) Component A: (parts by weight)

[0073] Polyether polyol DL-2000D60

[0074] Polyether polyol EP-330N10

[0075] Diphenylmethane diisocyanate MDI-5010

[0076] 2) Component B: (parts by weight)

[0077] Polyether polyol EP-330N30

[0078] Chlorinated paraffin-5250

[0079] b. Preparation

[0080] Add the polyether polyol in component A into the container, stir, and raise the temperature to 60°C;

[0081] After component B is stirred and dispersed evenly, it is heated to 100°C.

Embodiment 2

[0083] Repeat Example 1 only,

[0084] A material preparation

[0085] 1) Component A: (parts by weight)

[0086] Polyether polyol DL-2000D80

[0087] Polyether polyol EP-330N30

[0088] Diphenylmethane diisocyanate MDI-5020

[0089] 2) Component B: (parts by weight)

[0090] Polyether polyol EP-330N60

[0091] Chlorinated paraffin-5260

[0092] b. Preparation

[0093] Add the polyether polyol in component A into the container, stir, heat up to 80°C, add MDI-50, heat up to 80°C, after the reaction is complete, cool down and vacuum defoam for 20 minutes;

[0094] After component B is stirred and dispersed evenly, it is heated to 110°C and vacuum dehydrated for 2 hours.

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Abstract

The invention discloses a preparation method of a joint sealing material. The preparation method comprises the following steps: a component A and a component B are prepared, a polyurethane prepolymer and a curing agent are prepared respectively, the component A and the component B are prepared in the weight ratio being 1:2 in a construction site, and joints are filled with a caulking gun. The polyurethane joint sealing material can be cured at the room temperature, has higher adhesive strength, good caulking performance and prominent expansion deformation capacity for expansion joints of a concrete structure, can be widely used for sealing of road joints and is especially applicable to sealing of concrete expansion joints of ballastless tracks of expressways.

Description

technical field [0001] The invention belongs to the technical field of sealants, and in particular relates to a preparation method of a caulking and sealing material. Background technique [0002] With the rapid development of my country's high-speed railway, slab ballastless track occupies a large proportion of my country's high-speed railway track, and the convex block between every two track slabs needs caulking of sealant. In order to prevent the concrete road bed slab from being deformed and cracked by external factors, resulting in structural damage, it is usually necessary to reserve a certain number of shrinkage joints and construction joints during the construction process, so such gaps are often sealed with caulking materials. Choosing a good caulk material is critical to improving the durability of concrete pavements. At present, asphalt or modified asphalt is the main filling material for joints. The main defect of these materials is that the materials need to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C08G18/48C08G18/12C08G18/32
CPCC08G18/12C08G18/4812C08G2190/00C09J175/08C08G18/48C08G18/3814
Inventor 赵宝生赵永生赵根生
Owner SHANXI SIFANG HENGTAI WATERPROOF MATERIALS
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