Jiangsu Ming Hao construction of the series of silicone sealant use technology guide

1 scope of application：

Applicable to Jiangsu Ming Haoxin Mstar Stock Technology Ltd produces except structural adhesive outside of the various series of silicone sealant series products.

2 general provisions：

2.1 recommended the use of the Ming Hao company of the series of silicone sealant for building the user directly to the company or the company's designated vendors to order, in order to get a reliable product, and has strong technical assistance.

2.2 For special building materials, construction industry for the emergence of new material, surface coating or surface treatment materials, users are advised to send samples to our company for adhesive / compatibility or pollution and related test, in my company issued the report can be used, only in accordance with the provisions of the method used.

2.3 Construction in the construction process must have a complete record, including the construction of temperature, humidity, date, time, construction sealant products brands, production date, batch number, whether by bottom paint, cleaning procedures and construction name etc..

2.4 Users in the sealant use process if have any quality or technical problems, should take the fastest way to inform the technical department of the company, we will provide warm, timely, and thoughtful technical services; if encountered major quality problems, without prior notice that continue to use, should stop sealant use.

3.Design reference：

3.1 Explain：

Use of sealants for sealing joint, the main factors to be considered are: the substrate, coating, cushioning material, adhesive spacer and sealant.

3.2 Base material：

3.2.1 Building materials: brick, concrete, ceramics, marble, glass, metal, plastic, wood, they generally can be divided into porous and nonporous material. Some of the material and the sealant is very poor, only through physical or chemical surface treatment before and sealant, full attention must be paid to.

3.2.2

Metal protective coating and concrete waterproof coating may affect the sealant and substrate between the bonding quality. These coatings are sometimes difficult to discover, appear weak bonding or destroyed still do not know whether protective layer on substrate surface. Therefore, selection should advance with the company and substrate manufacturing method negotiation, to determine the seam processing method in coating sealant or whether it is necessary to choose suitable primer, necessary / compatibility test to determine adhesion.

3.3 Base coating：

The primer is designed to improve the adhesion between the sealant and substrate. Ming Hao brand silicone sealant for the vast majority of base of good adhesion, without primer. When the Jiangsu Ming Haoxin Mstar Technology Ltd adhesive / compatibility test indicate the need of primer, the construction side must use the Jiangsu Ming Haoxin Mstar Stock Technology Ltd provided or specified coating.

3.4 Gasket material：

Proper joint design for correct selection and use of materials to ensure reliable sealing gasket. Gasket materials the following functions：

a.Control joint sealant embedded depth and shape。

b.The sealant complete wetting of the substrate surface.

c.When the condition is not suitable for immediate sizing or in case of sealant failure, can be used as a temporary seal joint. Oil impregnated materials, asphalt, not carded of polymer and similar materials can not be used as a cushioning material, to avoid contamination of the substrate or sealant. Recommend the use of flexible foam or sponge rubber strip, such as polyurethane foam or a polyethylene foam material, in the slit does not generate permanent deformation, non-absorbent, inspiratory, not because of heating and uplift the sealant bubble. Cushioning material in internal limiting the movement joint sealant. In order to prevent the liner material in sizing before rain water, should be promptly applied sealants. Obturator liner material to the original size should be larger than the joint width 25-30%; open hole liner material to the original size should be larger than the width of the 40-50% seams.

3.5 Bonding isolator:

Bonding isolator is used to prevent exposure to don't want sealant bonding to the surface or material, this kind of bond will destroy the sealant performance ( see Figure 3). Can be used as adhesive spacer material: PE or PTFE tape or the company recommended antisticking material. Do not recommend the use of liquid adhesive barrier, because may be utilized when pollution is the adhesive surface. Bonding isolator used in seam bottom hard not easy deformation of liner material, to prevent the sealing adhesive received these materials, the formation of harmful three edge bonding. The soft easy to deformation of the open hole liner material without bonding spacers, because it does not significantly restrict sealant free movement. Oil impregnated materials, asphalt, uncured polymer and similar materials can not be used as bonding isolator.

3.6 The sealing seam shape size：

Seam shape size and multiple parameters: including the appearance of seams, joints, joint space expected displacement, the sealant displacement ability, construction method. Fig 1, 2, 3 and introduces some typical joint seal form.

3.6.1 Sealing width：

According to the provisions of article 4.3.9 JGJ102-2003 calculation, shall be not less than 2 times of thickness of the.

For example: 2 meters long glass plate ( material line expansion coefficientα =0.80*10-5 ) 1/ ℃), the expected temperature 80 ℃, 3.0mm structure tolerance, the sealant displacement capacity of 12.5%. Seismic effect and other effectsdE=2mm

Seek the glue seam width：

3.6.2 Sealant depth：

Sealing adhesive and sealant width depth. Design of seam width should be fully considered in the use of building materials, construction of the line coefficient of expansion of the season and was predicted using a limit temperature. Sealant depth, recommend the following values：

A. Sealant minimum width and depth is 6.0mm.

b. Sealant width must be greater than the depth.

c. Filled concrete, masonry or stone seam width below 13mm, sealant depth took the same size, width 13-25mm depth and width of half of sealant.

d. On metal, glass and other non-porous material seam, slot width is 6.0-13.0mm, the depth of a lot of 6.0mm sealant; crack width is greater than 13.0mm, depth 6.0-13.0mm sealant sealant; the depth cannot be greater than 13.0mm

4.Sealant application：

4.1 Environmental requirements：

Sealant should be at a temperature of 4℃ -40 ℃, relative humidity 40%-80% clean environment construction, rain, snow, not construction. Ambient temperature is too low will decrease the sealant adhesion, because the sealant surface wettability is reduced, and at low temperature of the substrate may be formed of frost and ice, effects of sealant adhesive. Therefore, the sealant for the safe use of temperature higher than 4 ℃. High environmental temperature on sealant also have adverse effects, in the high ambient temperature and sunlight on the surface of the substrate surface buildings, the actual temperature may be higher than ambient temperature. Because of the impact of high temperature, sealing the sagging resistance will become bad, will accelerate the curing time, using the time and the repair time will be shortened, at the same time, easy to have a bubble. Relative humidity is too low will cause the sealant curing speed slow, high relative humidity may be formed on a surface of a substrate of condensate film, effects of sealant and substrate adhesion, may also make the sealant to form bubbles.

4.2 Surface cleaning process：

a. substrate glued part must be clean, remove dust, dirt or other contaminants.

b. cleaning liquid should use adhesive test report indicated in the solvent, at an unspecified point can be use to clean the isopropyl alcohol ( IPA ), methyl ethyl ketone ( MEK ) or xylene ( XYLENE ) as solvent, wherein the latter is toxic, with two more appropriate.

c. basic cleaning method is as follows: firstly, the solvent wetting the hair removal of cotton cloth to scrub the surface of the substrate, and then a clean with a rag in the solvent prior to solvent and contaminants from the substrate surface wipe, should not make solvent dry naturally, so as to prevent dirt reattach Yu Jicai surface.

d. for narrow and deep interface, you will need to clean cloth wrapped around the putty knife, forced to scrub.

e. after cleaning the substrate must be within 1 hours of sizing is completed, or must be clean. If the cleaned surface again exposed to rain or dirt, also must be cleaned.

f. in the white cloth was contaminated after the replacement should be timely, and dip dip solvent solvent from within the container should be dumped in a clean cloth, rather than the cloth into the container dipped dipped, otherwise clean solvent will be contaminated, influencing the cleaning effect.

g. due to the cleaning fluid is combustible explode easily, and has a certain toxicity, so use their place must have good ventilation conditions, is strictly prohibited fireworks, and take necessary safety measures.

4.3 coating applications:

a. for most substrates, Ming Hao brand silicone sealant do not use primer has good adhesive effect, but if the adhesion test noted in the report to use primer, in actual construction must be used in my company provided or specified coating.

b. users should be in the substrate after cleaning, before applying sealant primer treatment.

c. primer in clean do not shed cloth, the sticky surface is coated with a layer of thin and uniform primer, remember not to use too much of a primer.

d. users should base coating brushing 3-5 minutes sizing, otherwise it will affect the adhesive effect.

e. general primer drying time is 20 seconds, if time is too long, probably because of excessive or failure.

f. primer liquid and cleaning liquid is similar, with some risk, and take corresponding measures of safety protection.

4.4.1

a. silicone sealant should be at a temperature of 4℃ -40℃, it can obtain better bonding effect.

b. after cleaning the substrate to be sticky surface near the site when necessary can be stuck on the temporary protection tape.

c. sealant squeezing action shall be continuous, so that the glue evenly and continuously in the shape of a cylinder from the glue injecting gun nozzle extrusion, and a gun nozzle diameter should be less than the thickness of glue injection interface, so that the gun nozzle can extend the depth of one. The gun nozzle should be evenly and slowly moving, ensure that the interface is filled with sealant, to prevent Qiangzui moving too fast and bubbles or hole.

d. glue injection completion should be carried out immediately after the modification method is to use a tool, usually forced to interface a sealant to the interface pressure and the interface surface repairing and scraping leveling, make glue and adhesive surface full contact, then remove all temporary protection tape.

e. sizing within 48 hours after the sealant is not completely cured, sealing the seams are not allowed to have large displacement, otherwise it will affect the sealing effect.

4.4.2 one-component sealant construction program:

one-component sealant can be manual or pneumatic sizing grab directly from a plastic tube or sausage type package extrusion construction, or a single component glue machine construction.

4.4.3 two-component sealant construction program:

4.4.3.1 two-component sealant must be strictly in accordance with the following procedure construction to guarantee the construction quality.

4.4.3.2 two-component sealant should use of two-component glue machine construction, does not recommend the manual mixing glue.

4.4.3.3 two-component sealant curing speed, is used to determine the base material and a curing agent ratio between:

a. in a beaker or other container injection amount of evenly mixed sealant.

b. will be a round rod or putty knife into a part to the sizing material, and from the glue mixed start time .

c. every 5 minutes, the small rod ( putty knife ) from compound extract, and observe the glue material pulled part is the sudden fracture.

E. normal proportion of two-component product suddenly snap time should be within 20 to 60 minutes, or A, B proportion should be adjusted.

f. the company bicomponent silicone sealant products at standard conditions ( temperature 23℃± 2, 50%± 5% relative humidity ), A:B=10:1 ( volume ratio ), breaking time is 20-60 minutes. In general, A, the volume ratio of B using a ratio of 10:1, but the user can be in between A:B=8:1-12:1 regulation of A, B ratio, in order to meet the requirement of breaking time.

g. breaking time is influenced by temperature, high temperature tensile time will be short, low temperature breaking time president.

H. two-component adhesive A, B component proportion, mixing glue density change is a normal phenomenon.

I.B component has high reaction activity, easily due to hydrolysis and failure, users should pay attention to sealing preservation.

4.4.3.4 A sealant, B component mixing uniformity determination of butterfly test:

a. will glue machine play well mixed glue onto the paper ( the size of A4 copy paper size) intermediate 5-10 grams, folding paper glue pressing.

b. open the paper check colloid, mixing glue should be no color stripe, indicates that mixing is uneven, should find out the reasons, the problem is resolved in order to use.

4.4.3.5 tensile test and butterfly test through only after the normal construction.

5. on adhesion, compatibility and pollution test some specific requirements:

5.1 adhesion test: each test needs to use the size of 150mm*75mm glass or other plate not less than three block.

5.2 compatibility test: all the assembly design and sealant contact auxiliary materials, such as double-sided adhesive tape, foam rods are required for compatibility test, used in the test of each material length of not less than 100mm.

5.3 pollution test: each test needs for dimension 250mm*250mm composites tested were three block.

5.4 in the sample, should also be according to appendix A or appendix B fill in the application form, and samples were sent to the company.

5.5 Speedpost ( EMS ) sending the samples, to prevent sample loss and timely test, at the same time must pay attention to the packaging to prevent breakage of a good sample.

5.6 usually test cycle for 35 days.

for expedited testing requirements, the company received a full range of materials, will try to advance, and fax the preliminary test result, and formal test report after the completion of the test as soon as possible to a user.

users are we considered reliable information, as the actual situation is differ in thousands of ways, we may not totally understand in all cases, so we can not be assured that products in some usage and use correctness and applicability. Users in the use of products prior to a detailed understanding of the product, and then to determine the best method of using