Slow expansion type building water-stop glue and preparation method thereof

A water-stop glue, slow-expansion technology, applied in building components, building insulation materials, adhesives, etc., can solve the problems of low expansion ratio retention rate, small expansion ratio, easy loss of expansion factor, etc., to achieve simple use and service life. Long, good water stop effect

Active Publication Date: 2014-04-23
衡水大众橡塑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-absorbing factor of the water-swellable water-stop adhesive currently used in the market is an additive type, that is, it is composed of polymer water-absorbing resin, bentonite and polyethylene glycol materials. Defects of small expansion ratio, easy loss of expansion factor and low expansion ratio retention rate after repeated expansion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step: preparation of hydrophilic polyurethane prepolymer

[0033] It is composed of 20 parts by weight of hydrophilic polyether triol, 30 parts by weight of hydrophilic polyether glycol, 4 parts by weight of polyoxypropylene glycol, 5.5 parts by weight of polyoxypropylene triol, and 45 parts by weight of chlorinated paraffin The prepolymer plasticizer is pumped into the reactor to stir and heat, and the vacuum system is turned on to make the vacuum in the reactor reach 0.096Mpa. When the temperature of the material rises to 96℃, maintain the above temperature and vacuum and start timing dehydration for 2 hours After that, cool down to 60℃;

[0034] Under stirring conditions, 6 parts by weight of toluene diisocyanate and 3 parts by weight of diphenylmethane-4,4'-diisocyanate were added to the above reaction kettle, and the temperature was slowly raised to 70°C within 60 minutes, and the reaction temperature was stable Then, a catalyst composed of 0.03 parts by weig...

Embodiment 2

[0038] The first step: preparation of hydrophilic polyurethane prepolymer

[0039] It is composed of 25 parts by weight of hydrophilic polyether triol, 20 parts by weight of hydrophilic polyether glycol, 5 parts by weight of polyoxypropylene glycol, 4.5 parts by weight of polyoxypropylene triol and 55 parts by weight of chlorinated paraffin The prepolymer plasticizer is pumped into the reactor to stir and heat, and the vacuum system is turned on to make the vacuum in the reactor reach 0.095MPa. When the temperature of the material rises to 102℃, maintain the above temperature and vacuum, and start timing for dehydration for 2.5 hours After that, cool down to 55℃;

[0040] Under stirring conditions, 7 parts by weight of toluene diisocyanate and 3 parts by weight of diphenylmethane-4,4'-diisocyanate were added to the above reaction kettle, and the temperature was slowly raised to 65°C within 90 minutes, after the reaction temperature stabilized , Adding a catalyst composed of 0.02 p...

Embodiment 3

[0044] The first step: preparation of hydrophilic polyurethane prepolymer

[0045] Combine 15 parts by weight of hydrophilic polyether triol, 25 parts by weight of hydrophilic polyether diol, 6 parts by weight of polyoxypropylene glycol, 4.0 parts by weight of polyoxypropylene triol and 25 parts by weight of chlorinated paraffin, The prepolymer plasticizer composed of 10 parts by weight of dibutyl phthalate and 5 parts by weight of butyl phthalate is pumped into the reactor to stir and heat, and the vacuum system is turned on to make the vacuum in the reactor Reach 0.098MPa, when the material temperature rises to 100℃, maintain the above temperature and vacuum degree, start timing dehydration for 3.5 hours, then cool down to 58℃;

[0046] Under stirring conditions, 4 parts by weight of toluene diisocyanate and 4.5 parts by weight of diphenylmethane-4,4'-diisocyanate were added to the above reaction kettle, and the temperature was slowly raised to 75°C within 80 minutes, after the r...

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Abstract

The invention belongs to the technical field of waterproof materials and specifically discloses a slow expansion type building water-stop glue and a preparation method thereof. The main technical scheme is as follows: drawing hydrophilic polyether diol, hydrophilic polyether glycol, polyoxypropylene glycol, polyoxypropylene triol and a prepolymer plasticizer into a reaction kettle, stirring, heating, performing reaction and dehydration under vacuum conditions, and then adding toluene diisocyanate and diphenylmethane-4, 4'-diisocyanate for reaction to obtain a hydrophilic polyurethane prepolymer; and then sequentially adding the hydrophilic polyurethane prepolymer, ethyl acetoacetate or acetylacetone, a coupling agent, kaolin, nano-modified calcium carbonate, a water-stop glue catalyst and glass microbeads into a stirring tank for stirring reaction to obtain the slow expansion type building water-stop glue. The water-stop glue has the characteristics of high expansion rate in using process, no loss of expansion factor and high retention rate of the expansion rate after repeated expansion.

Description

technical field [0001] The invention belongs to the technical field of building sealants, and relates to a slow-expansion building water-stopping glue composed of waterproof and hydrophilic polyurethane prepolymer, which is used in construction joints and connecting joints formed between engineering concrete or between concrete and steel bars and other media. and its preparation process. Background technique [0002] The water-swellable waterproof adhesive is mainly used in the waterproofing of concrete construction joints in underground engineering, joints between steel bars and concrete, and post-cast belts, and waterproofing in the circumferential longitudinal and horizontal construction joints of roads, railways and subsea tunnels. The water-absorbing factor of the water-swellable water-stop adhesive currently used in the market is an additive type, that is, it is composed of polymer water-absorbing resin, bentonite and polyethylene glycol materials. The defects of smal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C08G18/76C08G18/48C08G18/12E04B1/68
Inventor 张广强王志
Owner 衡水大众橡塑有限公司
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