GB/T 29755-2013 Elastic sealants for insulating glass

Preface

This standard is drafted in accordance with the rules given in GB/T1.1-2009.

This standard is proposed by the China Building Materials Federation.

This standard is under the control of the Building Sealing Materials Sub-Technical Committee (TC 195/SC3) of the National Technical Committee for the Standardization of Lightweight and Decoration Building Materials.

This standard is responsible for the drafting of the unit: China Building Waterproof Association, China Building Materials Inspection and Certification Group Suzhou Co., Ltd., China Building Materials Research Institute Suzhou Waterproof Research Institute, Hangzhou Zhijiang Organic Silicon Chemical Co., Ltd., Guangzhou Baiyun Chemical Industry Co., Ltd., Chengdu Silicon Treasure Technology Co., Ltd., Zhengzhou Zhongyuan Applied Technology Research and Development Co., Ltd., Zhejiang Lingzhi Fine Refining Co., Ltd., Guangzhou Coats Industrial Co., Ltd., Guangzhou Xinzhan Silicone Co., Ltd., Foshan Nanhai Golden Leaf Silicone Co., Ltd., Foshan Yuantong Adhesive Industry Co., Ltd., Shenzhen Bailichun Viscose Industry Co., Ltd., Shandong Baolongda Rubber Industry Co., Ltd.

Participating in the drafting of this standard: Jinan Huaya Sealant Co., Ltd., Jiangmen Daguang Viscose Co., Ltd., Shandong Yulong Polymer Technology Co., Ltd., Toray International Trade (China) Co., Ltd., AkzoNobel Sulfur Glue Chemical (Taixing) Co., Ltd., Changshu Hengxin Viscose Co., Ltd., Beijing Zhongtian Xingyun Technology Co., Ltd., Beijing Excellent Insulating Glass Materials Co., Ltd., Guangdong Changlu Fine Chemical Co., Ltd., Liaoning Lushi Chemical (Group) Co., Ltd., Zhejiang Huacheng Silicone Material Co., Ltd., Jinjiang Fenfa Rubber & Plastic Products Co., Ltd., Zhengzhou Guotai Sealing Material Technology Co., Ltd., Beijing Century Yuanda Technology Development Co., Ltd., Guangzhou Jitai Chemical Co., Ltd., Yangzhou Chenhua Technology Group Co., Ltd., Foshan Hongying Industrial Co., Ltd., Zhejiang Time Decoration Materials Co., Ltd., Zhaoqing Haohong New Materials Co., Ltd. Co., Ltd., Foshan Hongying Industrial Co., Ltd., Zhejiang Time Decoration Materials Co., Ltd., Zhaoqing Haohong New Materials Co., Ltd.

The main drafters of this standard: Zhu Zhiyuan, Zhu Dongqing, Li Buchun, Chen Shilong, Liu Ming, Guo Yueping, Zeng Rong, Zhu Deming, Xiang Hua, Ye Liming, Luo Wei, Pan Ziding, Zhu Jianliang, Xu Qiusheng, Zhu Xiaohua, Zeng Qingming, Zhu Bin.

This standard is being published for the first time.

1 Scope

This standard specifies the classification and marking, requirements, test methods, inspection rules, marking, packaging, transportation and storage of elastic sealants for insulating glass. This standard is applicable to two-component sealant for two-way sealing of insulating glass in non-structural assembly, and one-component insulating glass sealant can be used as a reference

2 Normative references

The following documents are essential for the application of this document. Where a reference is dated, only the dated version applies to this document. For undated references, the most recent version of the document (including all change orders) applies to this document.

GB/T 531.1 Vulcanized rubber or thermoplastic rubber -- Indentation hardness test method – Part 1: Shore hardness tester method (Shore hardness)

GB/T 13477.1-2002 Test methods for building sealing materials – Part 1: Specification of test substrates

GB/T 13477.2 Test methods for building sealing materials – Part 2: Specification for density

GB/T 13477.3 Test methods for building sealing materials Part 3: Methods for determining the extrusion of sealing materials using standard instruments GB/T 13477.5-2002 Test methods for building sealing materials Part 5: Determination of surface drying time GB/T 13477.6 Test methods for building sealing materials Part 6: Determination of fluidity

GB/T 13477.8 Test methods for building sealing materials Part 8: Determination of tensile adhesion GB/T 13477.10-2002 Test methods for building sealing materials Part 10: Determination of fixed-stretch adhesion GB/T 13477.17-2002 Test methods for building sealing materials Part 17: Determination of elastic recovery rate GB 16776 Silicone structural sealants for construction

GB/T 17146 Test method for water vapor permeability of building materials

GB/T 22083-2008 Classification and requirements for construction sealants

JC/T 485-2007 建筑窗用密封胶

3 Classification and marking

3.1 Classification

According to the polymer type of sealant, the product is divided into polysulfide (PS), silicone (SR), polyurethane (PU) and other sealants. 3.2 Marking

Products are marked in the following order: sealant name, polymer type, and this standard number.

Example: Polysulfide insulating glass sealant is marked as: insulating glass sealant PS GB/T 29755-2013.

4 Requests

4.1 Appearance

4.1.1 The sealant shall be a fine, uniform paste or viscous, and there shall be no bubbles, crusts or gels.

4.1.2 The color of each component should be significantly different.

4.2 Sealant performance

The physical and mechanical properties of the sealant shall be in accordance with the provisions of Table 1.

Table 1 Physical and mechanical properties

5 Test Methods

5.1 General Provisions

5.1.1 Standard test conditions

Standard test conditions in the laboratory: temperature (23±2)°C, relative humidity (50°5)%.

5.1.2 Test substrate

The test substrate should meet the requirements of GB/T 13477.1-2002 with a thickness of 6mm~8mm float glass, and the glass specified by the supply and demand sides can also be selected.

5.1.3 Specimen preparation

Before preparing the specimen, the sealant used for the test should be placed under standard test conditions for more than 24 hours. The test substrate is cleaned with a suitable detergent according to the manufacturer's requirements. The specimens are mixed evenly according to the proportion indicated by the manufacturer to avoid the formation of bubbles. If there are no special requirements in advance, injection molding and trimming should be completed within 20min after mixing. The number of bonded specimens and the processing conditions are shown in Table 2.

Table 2 Number of bonded specimens and processing conditions

5.2 Appearance

Scrape the components of the sample and inspect it visually.

5.3 Density

按GB/T 13477.2试验。

5.4 Sag

According to the GB/T13477.6 test, the test procedure A was used to determine and placed in an oven at (50±2) °C for 4h.

5.5 Surface dry time

According to GB/T 13477.5-2002 test, the type inspection adopts method A test, and the factory inspection can use method B test.

5.6 Applicable Period

The applicable period is carried out according to GB/T13477.3, determined by B method, the diameter of the extrusion hole is 4mm, the sample pretreatment temperature is (23 soil 2) °C, and the corresponding time when the extrusion rate is 50 mL/min.

5.7 Hardness

The sample is mixed evenly according to the proportion indicated by the manufacturer, and the formation of bubbles should be avoided, and the thickness should be scraped on the template, with a thickness of 6mm~7mm.

5.8 Elastic recovery rate

According to GB/T 13477.17-2002 test, the test elongation is 25%.

5.9 Tensile adhesion properties

Under the standard test conditions, the test was carried out according to the test steps of GB/T13477.8, and 5 specimens were tested, and the average value of 5 specimens was taken. For the measurement and calculation of the bond failure area, the number of grids occupied by the larger surface of the bond failure area on the two failure surfaces of the tensile adhesive specimen is measured through a transparent diaphragm printed with a 1mmx1 mm grid line, which is accurate to 1 grid (less than 1 grid is not counted), and the proportion of the number of bond failure grids to the total number of grids is calculated with a base area of 50mmx12 mm (that is, the total number of grids is 600 grids), which is expressed as a percentage. The elongation at maximum tensile strength is recorded, the arithmetic mean of elongation at maximum tensile strength is reported, the tensile bond strength is reported, and the bond failure area is reported.

5.10 Fixed-stretch adhesion

Under standard test conditions, according to GB/T 13477.10-2002 test, the test elongation is 25%. The failure of the specimen shall be determined by the Class E sealant in Chapter 7 of GB/T 22083-2008.

5.11 Tensile adhesion after water-UV treatment

According to the provisions of 5.12 in JC/T 485-2007, the test piece is continuously tested (168 ± 2) h, taken out and placed under standard test conditions for 2h, and tested according to 5.9. 5.12 Tensile adhesion after hot air aging

The specimen was put into an oven at (60 ±2) °C for (336 ±2) h, taken out and placed under standard test conditions for 2h, and the 5.13 thermogravimetric test was carried out according to 5.9.

5.13.1 Test equipment

The test equipment includes:

a) Oven: temperature control accuracy is 2°C;

b) Balance: accuracy of 1mg:

c) 铝板：尺寸为152 mmX80 mmX(0.5 mm~1.5 mm);

d) Metal mould frame: inner frame size 130 mmx40 mmx6.5 mm:

e) Scraper: about 150 mm long.

5.13.2 Test Procedure

Take two clean aluminum plates, weigh them separately and record the mass (m).

The metal mold frame is placed flat on the aluminum plate, the sealant is scraped in the mold frame and scraped flat with a scraper, the mold frame is removed to make the test piece, and the mass of the test piece (m2) is weighed and recorded. The specimen was placed under standard test conditions for 7 days.

The test specimen was kept in an oven at 90°C±2°C for 21 days.

The test specimen was taken out of the oven, placed in the dryer, cooled for 2 hours under standard test conditions, and then weighed and recorded the mass (m2) respectively. 5.13.3 Calculation of Results

The thermal loss is calculated according to the mass of the specimen before and after the test [Eq. (1)], and the test result is the arithmetic average of the two tests, with an accuracy of 0.1%.

W=(m:-m2)/(m2-m:)x100.......................... (1)

During the ceremony:

Thermal weight loss, expressed as a percentage (%);

m:-- mass of aluminum plate, in grams (g);

m:- Aluminum plate and sealant mass in grams (g);

The quality of the aluminum plate and sealant after the m2 test, in grams (g).

5.14 Water vapor transmission rate

The sealant was made into a diaphragm with a thickness of (2.0±0.2) mm and cured for 14 days under standard test conditions. Then according to GB/T 17146 test, the test temperature is (23 ± 0.6) °C.

6. Inspection rules

6.1 Inspection Classification

6.1.1 Factory inspection

The factory inspection items include: appearance, density, sagging, surface drying time, application period, hardness, tensile adhesion, and fixed-stretch adhesion.

6.1.2 Type Inspection

The type inspection items include all the items required in Chapter 5, and the type inspection shall be carried out under one of the following circumstances:

a) When a new product is put into production or product type identification:

b) During normal production, once a year:

c) When there are great changes in raw materials and processes, which may affect the quality of products;

d) When there is a big difference between the factory inspection results and the last type inspection results;

e) When the product has been out of production for more than 6 months and resumes production.

6.2 Group batch

Products produced at one time with the same type and the same process are inspected every 5t for a batch, and less than 5t can also be a batch. 6.3 Sampling

The two-component product should be randomly sampled, and the total sample amount should be 4kg, and the sample should be sealed and packaged immediately after sampling, and another 4kg sample should be taken as a backup sample.

6.4 Judgment Rules

6.4.1 Individual Determinations

6.4.1.1 Appearance

When the sample taken meets the requirements of the standard, it will be judged to be qualified.

6.4.1.2 Physical and mechanical properties

The sagging, fixed-stretch adhesion and each specimen meets the standard requirements, the item is judged to be qualified.

If the median hardness meets the requirements of the standard, the item is judged to be qualified. Density, surface drying time, application period, elastic recovery rate, tensile bond strength, elongation at maximum strength, bond failure area, tensile adhesion after water-ultraviolet treatment, tensile adhesion after hot air aging and thermal loss meet the requirements of the standard with the arithmetic average, the item is judged to be qualified. The water vapor transmission rate is taken as an arithmetic mean and the reported value is given.

6.4.2 Comprehensive Determination

6.4.2.1 When all the factory inspection items meet the requirements, the batch of products will be judged to be qualified.

6.4.2.2 When the type inspection items meet all the requirements of Chapter 4, the batch of products will be judged to be qualified.

6.4.2.3 When the appearance quality does not meet the standard requirements, the batch of products will be judged to be unqualified.

6.4.2.4 When two or more indicators in Table 1 do not meet the standard requirements, the batch of products will be judged to be unqualified.

6.4.2.5 Under the condition that the appearance quality is qualified, if one of the test results in Table 1 does not meet the requirements of the standard, a single inspection shall be carried out on the item with a spare sample, and the batch of products shall be judged to be qualified, otherwise the batch of products shall be judged to be unqualified.

7 Marking, Packaging, Transportation and Storage

7.1 Logos

The minimum package of the product should have a logo that includes:

a) Product name (including component name);

b) Product Marking:

c) production date, batch number and storage period;

d) Net mass or net capacity:

e) Name and address of the manufacturer:

g) Instructions and precautions for use:

f) Trademarks:

7.2 Packaging

The product should be packed in an airtight container. In addition to the signs specified in 7.1, the packaging barrel or packing box should also have rainproof, moisture-proof, sun-proof, impact-proof and other signs.

7.3 Carriage

During transportation, it should be protected from sun and rain, impact, and squeezing packaging.

7.4 Storage

The product should be stored in a dry, ventilated and cool place, and the appropriate storage temperature should not exceed 27 °C.

Under normal transportation and storage conditions, the storage period is at least 6 months from the date of production.

bibliography

[1] GB 24266-2009 Silicone structural sealant for insulating glass

The material comes from the Internet.

END