Preface
4.2.2 of this standard is mandatory, and the rest is recommended.
This standard corresponds to ASTM C 1369:2002 "Second Sealant for Insulating Glass Units for Structural Mounting", the degree of conformity of this standard with ASTM C 1369:2002 is non-equivalent, and Annex A of this standard refers to prEN15434:2005 "Architectural Glass – Product Standard for Structural and/or UV-Resistant Sealants for Structural Seal Mounting or Exposure Sealing of Insulating Glass Units".
Appendix A of this standard is a normative appendix.
This standard is proposed by the China Building Materials Federation.
This standard is under the control of the National Technical Committee for the Standardization of Lightweight and Decorative Building Materials (SAC/TC 195).
The drafting unit of this standard is: Suzhou Waterproof Material Research and Design Institute of China Chemical Building Materials Corporation, Guangzhou Baiyun Chemical Industry Co., Ltd., Zhengzhou Zhongyuan Application Technology Development Co., Ltd., Zhejiang Lingzhi Fine Chemical Co., Ltd., Guangdong Jiangmen Daguang Viscose Co., Ltd., Guangzhou Xinzhan Silicone Co., Ltd., Chengdu Sibao Technology Co., Ltd., and Dow Corning Silicone Trading (Shanghai) Co., Ltd.
Participating in the drafting of this standard: Guangzhou Coats Industrial Co., Ltd., Foshan Nanhai Golden Leaf Silicone Co., Ltd., Guangzhou Antai Chemical Co., Ltd., Changshu Hengxin Viscose Co., Ltd., Yangzhou Chenhua Technology Group Co., Ltd., Zhejiang Huacheng Silicone Materials Co., Ltd., Guangdong Foshan Yuantong Adhesive Industry Co., Ltd., Jiangmen Kuaishida Adhesive Industry Co., Ltd., Hubei Wuda Photonic Technology Co., Ltd., Shandong Baolongda Rubber Industry Co., Ltd.
The main drafters of this standard: Chen Wenjie, Zhu Zhiyuan, Zhang Xinjiong, Wang Wenkai, Chen Shilong, Wang Mingshuang, Cui Hong, Zhang Guanqi, Wang Youzhi, Zhou Fuwei, Zhu Xiaohua, Wang Lan. This standard is being published for the first time.
1 Scope
This standard stipulates the classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of silicone structural sealants for insulating glass (referred to as insulating glass silicone structural adhesives).
This standard applies to silicone sealants for the second sealing of insulating glass units in structural assembly.
This standard does not apply to silicone structural sealants for structural bonding and assembly of building curtain walls.
2 Normative references
The clauses in the following documents become the clauses of this standard by reference in this standard. All subsequent revisions (excluding errata) or revisions of dated references are not applicable to this standard, however, parties who have reached an agreement under this standard are encouraged to investigate the possibility of using the latest versions of these documents. The most recent version of an undated reference applies to this standard.
GB/T 531.1-2008 Vulcanized rubber or thermoplastic rubber -- Test methods for crushing hardness – Part 1: Shore hardness tester method (Shore hardness) (ISO 7619:1986, IDT)
GB/T 13477.1-2002 Test methods for building sealing materials – Part 1: Specification for test substrates (ISO 13640:1999,
MODE)
GB/T 13477.5-2002 Test methods for building sealing materials – Part 5: Determination of surface drying time
GB/T 13477.6-2002 Test methods for building sealing materials – Part 6: Determination of flowability (ISO 7390:1987.MOD)
GB/T 13477.10-2002 Test methods for building sealing materials – Part 10: Determination of fixed-tensile adhesion (ISO 8340:1984.MOD)
GB 16776-2005 Silicone structural sealant for construction
GB/T 22083-2008 建筑密封胶分级和要求(ISO 11600:2002,MOD)
JC/T 485-2007 Elastomeric sealant for building windows
3 Classification
3.1 Classification
The products are divided into one-component type (1) and two-component type (2) according to the component.
3.2 Marking
Products are marked in the following order: name, classification, and number of this standard.
Example: Silicone Structural Sealant for Two-Component Insulating Glass is labeled as: Insulating Glass Silicone Structural Adhesive 2
4 Requests
4.1 Appearance
4.1.1 The sealant should be a fine, uniform paste or viscous, and there should be no bubbles, agglomeration, crust or gel, and no precipitates that are not easy to disperse.
4.1.2 The color of each component of the two-component sealant should be significantly different. The color of the product can also be agreed by the supplier and the buyer, and the color of the product must not be significantly different from the sample agreed by the supplier and the supplier.
4.2 Physical and mechanical properties
4.2.1 The applicable period of two-component sealant shall be agreed upon by both the supplier and the buyer.
4.2.2 The physical and mechanical properties of the sealant shall be in accordance with the provisions of Table 1.
4.2.3 The compatibility of insulating glass silicone structural adhesive with the first butyl sealant and joint weathering adhesive shall comply with the provisions of Appendix A.
4.2.4 The adhesion of insulating glass silicone structural adhesive and glass substrate for practical engineering shall comply with the provisions of Appendix B of GB 16776-2005.
Table 1 Physical and mechanical properties
5 Test Methods
5.1 General Provisions
5.1.1 Standard test conditions
The standard test conditions of the laboratory are: temperature (23°2)°C, relative humidity (50°5)%.
5.1.2 Test substrate
The test substrate should meet the requirements of 4.2 in GB/T 13477.1-2002, and the thickness should be (6~8)mm.
5.1.3 Specimen preparation
5.1.3.1 Before preparing the test piece, the sealant used for the test should be placed under standard conditions for more than 24 hours. The test substrate should be cleaned with a suitable detergent. The two-component sample should be stirred and mixed evenly under vacuum conditions of negative pressure of about 0.09MPa according to the proportion indicated by the manufacturer, and the mixing time should be about 5min. Unless otherwise specified, injection molding and trimming should be completed within 10 minutes after mixing.
5.1.3.2 The number of cohesive specimens is shown in Table 2.
Table 2 Number of cohesive specimens 5.1.3.3 The prepared specimens are maintained under the following conditions:
a) The two-component structural adhesive was left under standard test conditions for 14 days;
b) The one-component structural adhesive was left under standard test conditions for 21 days;
c) Under the condition that the specimen is not damaged, the cushion block should be separated as soon as possible during the curing period.
5.2 Appearance
The specimen is scraped flat and visually inspected.
5.3 Sag
According to the GB/T 13477.6-2002 test, the width of the sag mold groove is 20mm, and the specimen is placed in the oven at (50 ±2) °C for 4h.5.4 surface drying time
According to GB/T13477.5-2002 test, the type inspection adopts the A method test, and the factory inspection can use the B method test.
5.5 Extrusion
According to the GB16776-2005 6.4 test.
5.6 Applicable Period
The application period of two-component sealant is tested according to 6.5 in GB 16776-2005.
5.7 Hardness
The sample is squeezed on the template, then scraped flat, the thickness is (6~7) mm, and the curing is carried out according to 5.1.3.3, and then the diaphragm is removed, and the test is carried out according to GB/T 531.1-2008. 5.8 Tensile adhesion and modulus at 10% elongation
According to the 6.8 test in GB16776-2005, the modulus at 10% elongation at 23°C was reported, and the arithmetic mean value was taken.
5.9 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 judged according to 7.3 in GB/T 22083-2008.
5.10 Heat aging
According to GB 16776-2005 6.9 test
6 Inspection Rules
6.1 Inspection Classification
Product inspection is divided into factory inspection and type inspection.
6.1.1 Factory inspection
The factory inspection items include: appearance, sagging, surface drying time, extrusion, tensile adhesion at 23°C, modulus at 10% elongation, and fixed elongation
Adhesion.
6.1.2 Type Inspection
The type inspection items include all the items required by 4.1 and 4.2.2, 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 every six months:
c) When there are major 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
The same variety and the same type of product are inspected every 5t for a batch, and less than 5t can also be a batch.
6.3 Sampling
The product is randomly sampled, the total amount of the sample is about 4kg or meets the testing requirements, it is divided into two parts, one for the test, one for backup, and the two-component product should be sealed and packaged separately immediately after sampling.
6.4 Adjudication Rules
6.4.1 Individual Determinations
If the sagging, surface drying time, tensile adhesion, and fixed-stretch adhesion of each specimen meet the requirements of the standard, the item is judged to be qualified. The rest of the items are tried
The arithmetic mean of the test results meets the requirements of the standard and is judged to be qualified.
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 4.1.4.2.2, 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 of 4.2.2 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 inspection results of 4.2.2 does not meet the standard requirements, 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, storage
7.1 Logos
The minimum packaging of the product should have a strong non-fading mark and include:
a) Product name:
b) Component name (two-component);
c) Name and address of the manufacturer:
d) Product Marking:
e) production date, batch number and storage period;
f) Net content:
g) Trademarks:
h) Instructions and precautions for use.
7.2 Packaging
The product should be packed in bottles or drums, and the packaging container should be tightly closed.
In addition to the signs specified in 7.1, the packaging barrels or boxes should also have rainproof, moisture-proof, sun-proof, and impact-proof signs.
7.3 Transportation
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 storage temperature should not exceed 27 °C.
Under normal transportation and storage conditions, the storage period is at least six months from the date of production.
Appendix A
(Normative Appendix)
Compatibility of insulating glass silicone structural adhesives with contact materials
A.1 Scope
This appendix is applicable to the determination of insulating glass silicone structural adhesives and contact materials and their compatibility with each other.
The compatibility test is to detect the changes in the appearance and tensile adhesion of the insulating glass silicone structural adhesive and the contact materials and their mutual treatment after heating or ultraviolet treatment.
A.2 Specimen preparation
A.2.1 Prepare the specimen according to 5.1.3, cured until it can separate the stop (about 1d), as shown in Figure A.1, inject the material in contact with each specimen, and cover the contact part between the material and the substrate with anti-adhesive material before injection, and the thickness of the injected material is about 6 mm (if it is about 2mm thickness of butyl glue). Ten specimens were prepared for each group (five treatments, five comparisons), and the specimens were cured under standard test conditions after completion, with 14 d. 21 d.
A.2.2 According to the needs of the project, the following combinations can be adopted:
--Inject a single contact material on one side of the structural adhesive:
First, inject different contact materials on both sides of the structural adhesive.
A.3 Test Treatment
Take out one group of cured specimens and put them horizontally into a transparent glass dish, the upper mouth of the glass dish is sealed with aluminum foil, and the other group is not treated.
A.3.1 Heat treatment
One group of specimens and glass dishes were put horizontally into the oven at (70 ±2) °C (672 ± 5) h for testing, and the other group of specimens were not treated and cured as a comparison, and the test was carried out immediately according to 5.8 under standard test conditions.
A.3.2 Ultraviolet treatment
Put a group of specimens and glass dishes into the ultraviolet box required by 5.12 in JC/T 485-2007, without adding water, the transparent surface of the glass dish is facing the light source, irradiate (672 ± 5) h test, and the other group of specimens is not treated and cured as a contrast, and the test is carried out immediately according to 5.8 under standard test conditions.
A.4 Test Procedure
After the treatment expires, take out the specimen and place it for 4 hours under standard test conditions, and observe the appearance comparison of the sealant and contact material with the comparison specimen, such as: discoloration, stickiness, softness, hardening, expansion, cracking, etc. Then, the test was carried out under standard test conditions according to 5.8, and the tensile bond strength after the test treatment was recorded, and the tensile bond strength results were compared with the previous results as a comparison.
A.5 Calculation of Results
The rate of change of tensile bond strength is calculated according to Eq. (A.1):
R.=[(T-T,)/T.x100 .......................... (. A.1)
During the ceremony:
R, the rate of change of tensile bond strength after sample treatment, %;
T-The average tensile bond strength of the sample after test treatment, in megapascals (MPa);
Ti-Average untreated tensile bond strength of the Ti-comparison sample in megapascals (MPa).
A.6 Evaluation of results
Compatibility should meet all of the following requirements:
--There is no change in the appearance of the specimen after test treatment, and no change in appearance means: no obvious discoloration, no stickiness, no softness, no hardening, no expansion, no cracks, etc.:
The change rate of tensile bond strength is not more than 20%; -The area of bond failure does not exceed 10%.
bibliography
Silicone structural sealant for insulating glass GB 24266-2009
The material comes from the Internet.
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