Air-permeable flexible putty for buildings and preparation method thereof

A breathable and flexible technology, applied in the field of building materials, can solve problems such as protective layer swelling, system instability, condensation, etc., and achieve good air permeability, excellent comprehensive mechanical properties, and strong air permeability

Active Publication Date: 2019-11-29
SUZHOU RES INST OF ARCHITECTURE SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the thermal insulation exterior wall needs free breathing inside and outside. The inside EPS, XPS, rock wool, etc. have good air permeability. If the inside water vapor is intercepted by the outside protective layer (plastering mortar, flexible putty), it will definitely cause condensation and ice on the inside. The swelling cycle of water makes the system unstable, and the protective layer bulges and falls off

Method used

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  • Air-permeable flexible putty for buildings and preparation method thereof
  • Air-permeable flexible putty for buildings and preparation method thereof
  • Air-permeable flexible putty for buildings and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A construction breathable flexible putty, the preparation process of which is as follows:

[0038] (1) Atomize 0.084 parts of n-octyltriethoxysilane water repellent, spray on 6 parts of expanded perlite, stir (50-60r / min) at 50-60°C, mix thoroughly for 1.5h, and leave at room temperature Stand for 24 hours and set aside; (2) Mix 28 parts of P.O52.5# ordinary Portland cement, 43 parts of calcite powder, 16.4 parts of lime calcium powder, 0.24 parts of calcium stearate, 5.5 parts of ethylene-vinyl acetate latex powder, Add 0.26 parts of hydroxymethylpropyl cellulose, 0.016 parts of sodium dodecylbenzene sulfonate, and 0.5 parts of melamine superplasticizer into the stirring equipment, stir thoroughly at 50-60 r / min for 2.2 hours, and then add step (1) The putty of the present invention can be obtained by stirring the treated expanded perlite at a slow speed of 30-40r / min for 1.2h.

Embodiment 2

[0040] A construction breathable flexible putty, the preparation process of which is as follows:

[0041](1) Atomize 0.128 parts of n-octyltrimethoxysilane water repellent, spray on 6 parts of expanded perlite, stir (50-60r / min) at 50-60°C, mix thoroughly for 1.6h, and place at room temperature Standby after 24 hours; (2) Mix 32 parts of P.O42.5# ordinary portland cement, 41 parts of calcite powder, 14 parts of lime calcium powder, 0.31 parts of calcium stearate, 6.1 parts of acrylic latex powder, 0.30 parts of hydroxyethyl Base cellulose, 0.012 parts of sodium dodecylbenzene sulfonate, and 0.15 parts of acrylic acid superplasticizer are added to the stirring equipment, and after 50-60r / min full stirring for 2.3 hours, then add the expanded perlite treated in step (1), Stir at a slow speed of 30-40r / min for 1.5h to obtain the putty of the present invention.

Embodiment 3

[0043] A construction breathable flexible putty, the preparation process of which is as follows:

[0044] (1) Atomize 0.182 parts of n-octyltriethoxysilane water-repellent, spray on 7.9 parts of expanded perlite, stir (50-60r / min) at 50-60°C, mix well for 1.5h, and leave at room temperature After standing for 24 hours, it is ready for use; (2) 34 parts of white Portland cement, 37 parts of calcite powder, 12 parts of lime calcium powder, 0.35 part of calcium stearate, 7.8 parts of ethylene-vinyl acetate latex powder, 0.22 part of hydroxymethylpropane Base cellulose, 0.018 parts of sodium dodecylbenzene sulfonate, and 0.53 parts of naphthalene-based water reducer are added to the stirring equipment, and after fully stirring at 50-60r / min for 2.5 hours, then add the expanded perlite treated in step (1) , 30 ~ 40r / min slow stirring 1.5h can get the putty of the present invention.

[0045] Performance Testing:

[0046] The general physical properties are tested according to JG / T...

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Abstract

The invention discloses air-permeable flexible putty for buildings and a preparation method thereof, and the air-permeable flexible putty is characterized by comprising the following components in parts by mass: 25-35 parts of cement; 30-50 parts of calcite powder; 10-20 parts of ash calcium powder; 4-8 parts of expanded perlite; 0.2-0.4 part of waterproof powder; 0.05-0.15 part of a water repellent; 4-8 parts of latex powder; 0.2-0.4 part of a water retention agent; 0.01 to 0.02 part of a micro-foaming agent and 0-0.6 part of a water reducing agent. The air-permeable flexible putty has strongair permeability, low water absorption and high water vapor permeation wet flow density. The expanded perlite and micropowder treated with hydrophobic water are adopted to improve the air permeability of the putty, and the water resistance and alkali resistance of the product meet the requirements of relevant standards.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a building breathable soft putty and a preparation method thereof. Background technique [0002] Construction putty is generally composed of cementing materials (water-soluble resins, water-dispersible resins or cement, etc.), fillers, additives and other ingredients to level the base surface. According to the standard, construction putty is divided into putty for interior wall of construction (JG / T 298-2010) and putty for exterior wall of construction (JG / T 157-2009). Because putty for interior wall is used indoors, there is basically no rainwater immersion, Harsh environments such as ultraviolet aging, so its composition is relatively simple, mainly composed of inorganic fractions such as calcite powder and ash calcium powder, and a small amount of cellulose, polyvinyl alcohol and other additives are added to meet the needs of construction. Since the inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00267C04B2111/00508C04B2201/50C04B14/28C04B14/185C04B24/04C04B24/42C04B24/26C04B24/383C04B24/20C04B2103/302
Inventor 赵长才陈晓龙
Owner SUZHOU RES INST OF ARCHITECTURE SCI
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