A polyurethane template for modeling concrete and its preparation process

A polyurethane and concrete technology, applied in the field of concrete molding, can solve the problems of difficult defoaming, short operating time, and high viscosity of the material body, and achieve the effects of excellent alkali resistance, improved flexibility, and long flow period

Active Publication Date: 2022-05-13
重庆千美集科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alkali and aging resistance of the polyurethane template in this scheme needs to be further optimized, and it uses polyolefin polyether polyol as the polyurethane soft segment to improve the alkali and aging resistance, which has the disadvantages of high viscosity of the material body, difficulty in defoaming, and operability. short time problem

Method used

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  • A polyurethane template for modeling concrete and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A polyurethane template for modeling concrete, the raw material components are calculated according to the weight ratio, and the specific components are as follows: 75 parts of hydroxyl-terminated silicone polyether polyol, 68 parts of isocyanate, 2 parts of chain extender, 25 parts of filler, plasticizer 4 parts of anti-aging agent, 0.9 parts of anti-aging agent, 0.4 parts of color paste, 0.2 parts of anti-settling agent, 0.25 parts of defoamer, 0.8 parts of catalyst, 0.4 parts of water remover, 3 parts of sepiolite powder (particle size 50-90 mesh), 1.7 parts of boron nitride nanotubes (20-50 nm in particle size, 5-20 μm in length), 10 parts of cross-linked polytetrafluoroethylene powder, 0.06 parts of alkali-resistant glass fiber, and 5.4 parts of silane coupling agent.

[0028] In the present embodiment, the preparation method steps of polyurethane formwork for modeling concrete include:

[0029] Step 1: At room temperature, add the prepared hydroxyl-terminated sili...

Embodiment 2

[0034] A polyurethane template for modeling concrete, the raw material components are calculated according to the weight ratio, and the specific components are as follows: 65 parts of hydroxyl-terminated silicone polyether polyol, 60 parts of isocyanate, 1 part of chain extender, 20 parts of filler, plasticizer 3 parts of anti-aging agent, 0.5 part of anti-aging agent, 0.3 part of color paste, 0.1 part of anti-settling agent, 0.2 part of defoamer, 0.6 part of catalyst, 0.4 part of water remover, 2 parts of sepiolite powder (particle size 20-100 mesh), 1.5 parts of boron nitride nanotubes (20-50 nm in particle size, 5-20 μm in length), 8 parts of cross-linked polytetrafluoroethylene powder, 0.05 parts of alkali-resistant glass fiber, and 5.1 parts of silane coupling agent.

[0035] In the present embodiment, the preparation method steps of polyurethane formwork for modeling concrete include:

[0036] Step 1: At room temperature, add the prepared hydroxyl-terminated silicone pol...

Embodiment 3

[0041] A polyurethane template for modeling concrete, the raw material components are calculated according to the weight ratio, and the specific components are as follows: 78 parts of hydroxyl-terminated silicone polyether polyol, 70 parts of isocyanate, 3 parts of chain extender, 30 parts of filler, plasticizer 5 parts of anti-aging agent, 1 part of anti-aging agent, 0.5 parts of color paste, 0.3 parts of anti-settling agent, 0.3 parts of defoamer, 1 part of catalyst, 0.5 parts of dewatering agent, 4 parts of sepiolite powder (particle size 50-100 mesh), 2 parts of boron nitride nanotubes, 11 parts of cross-linked polytetrafluoroethylene powder (particle size 20-50nm, length 5-20μm), 0.07 parts of alkali-resistant glass fiber, 4.8 parts of silane coupling agent.

[0042] In the present embodiment, the preparation method steps of polyurethane formwork for modeling concrete include:

[0043] Step 1: At room temperature, add the prepared hydroxyl-terminated silicone polyether po...

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Abstract

The invention provides a polyurethane template for modeling concrete and a preparation method thereof. The polyurethane template raw materials include hydroxyl-terminated silicone polyether polyol, isocyanate, chain extender, filler, plasticizer, anti-aging agent, color paste, anti-settling agent, defoamer, catalyst, water remover, sepiolite powder, boron nitride nanotubes, cross-linked polytetrafluoroethylene powder, alkali-resistant glass fiber; preparation method: polyol polyether polyether with hydroxyl-terminated silicone, chain extension agent, filler, plasticizer, and anti-aging agent to obtain mixture A; mix sepiolite powder, boron nitride nanotubes, and cross-linked polytetrafluoroethylene powder to obtain mixture B; mix alkali-resistant glass fiber with color paste Obtain mixture C; mix mixture A, B, C, anti-sedimentation agent, defoamer, catalyst, water remover and isocyanate, and then perform stirring, defoaming, mold casting and curing in sequence to obtain a polyurethane template. The polyurethane template of the present invention has excellent performance, and the material body has low viscosity during the preparation process, is easy to defoam and is easy to operate.

Description

technical field [0001] The invention relates to concrete modeling technology, in particular to a polyurethane formwork for modeling concrete and a preparation process thereof. Background technique [0002] Modeling concrete is the most commonly adopted way to increase the added value of concrete and promote the aesthetic value of architecture. It can design texture and pattern on the concrete surface (such as mushroom stone, imitation brick pattern, wormhole, lychee surface), and endow the concrete surface with form. Rich and varied decorative effects. [0003] Flexible formwork materials are the best formwork materials for preparing modeling concrete. The commonly used flexible formwork materials on the market are silica gel and polyurethane. However, the silicone material has two fatal shortcomings. One is that the strength is too low, and it can be reused up to 30 times; the other is that the hardness of the material is too low, and the texture is easy to deform. modeli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/50C08G18/32C08K7/14C08K3/34C08K3/38C08K3/26C08K5/01C08K5/3475C08K5/544
CPCC08G18/6674C08G18/5096C08G18/3206C08K7/14C08K3/34C08K3/38C08K3/26C08K5/01C08K5/3475C08K5/544C08K2201/011C08K2003/385C08K2003/265
Inventor 于丰
Owner 重庆千美集科技有限公司
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