What is the origin of ms sealant?

1.The origin of ms sealant

In the 1970s, the bell chemical (KANEKA) company in Japan invented to methoxy-silane sealing polymer polyether compounds, this polymer as the main functional raw material sealant products, with good adhesion, excellent weather resistance and other advantages, can fully meet the sealing needs of building joints. For silicone sealant, which is different from traditional makes the market more easy to accept, the Japanese construction market to the new address - analysing into シ リ コ ー ン シ ー ラ ン ト (translation: Modified silicone sealant), English is Modified Siliconesealant (MS sealant), hereinafter referred to as MS glue. Jonghwa also commercialized the Polymer under the name Jonghwa MS Polymer. Later, as the market became more and more aware of this new adhesive, the name of MS adhesive gradually spread to Europe and America, as well as China. This is where the name "MS sealant" comes from.

KANEKA is not alone in terminating polymers with hydrolyzed silane. From the end of last century to the beginning of this century, some other multinational chemical companies and domestic companies also commercialized silane modified Polymer products with similar structure to the bell MS Polymer, but the production technology route is completely different, such as the STPE product of Wack company and the SPUR product of Maitu Company, which can also be applied to the sealant and adhesive. But each has its own characteristics.

Silane modified sealant is a large category, which contains different silanes, different polymeric main chain of the basic raw materials made of sealant products. Among them, due to the commercial application of the bell MS sealant as the main raw material of the earliest, the most extensive, the most mature, the best market recognition, the name is simple, so MS glue has become a synonym for silane modified polyether glue. This point, in the national standard "silicone and modified silicone building sealant" (GB/T 14683-2017) made a clear description: the modified silicone building sealant is the end of the silicone alkyl polyether as the main component, room temperature curing of single component and multi-component sealant, marked as "MS". However, the name MS Polymer, as a Chinese translation of MS Polymer, refers specifically to the products of KANEKA, a chemical company.

2.What is a good MS sealant?

This problem can not be generalized, must be judged from the "quality" and "suitability" two aspects.

"Quality", to be assured, first sealant has a higher content of silane-modified polymer. In the past two years, due to fierce market competition, some glue factories reduce the content of silane modified polymer in sealant to reduce costs. At the beginning of the use of low content glue, the effect is OK, but 1-2 years later, the weakness of weather resistance, durability and insufficient bonding gradually appears, affecting the quality of construction, and finally the end consumer is affected. Secondly, we should strictly choose good raw materials, especially the main resin, and clear the formula proportion, strict management of the glue process, to ensure that each glue is the best. The manufacture of high quality sealant is a big test for the business philosophy and internal management ability of the rubber making enterprises.

"Suitability", is "suitable material suitable", refers to the right position to choose the right glue. Incorrect application configuration is bound to produce bad application effects. The judgment of suitability is the need to have a strong theoretical knowledge of sealant application and a long time of application experience, which is also the most difficult, the need for long-term application accumulation of glue enterprises.

3.The difference between ms sealant and silicone sealant

Comparison of contamination of silicone sealant and MS sealant. Silicone sealant itself is a very excellent product, with super weather resistance, but there are fatal shortcomings, that is, silicone oil will pollute the perimeter of the joint, the surface can not be coated. In China, the development of silicone sealant is the most mature, so in the construction market, silicone sealant takes the lead, but this also limits the choice of consumers, which leads to some areas that should not use silicone sealant, are occupied by silicone sealant. Generally speaking, silicone sealant on the curtain wall is the most suitable for structural bonding and weatherproof sealing of glass curtain wall. And in stone, concrete and other porous substrates on the sealing, MS adhesive comprehensive performance is better than silicone sealant. Therefore, when choosing glue, we should have the concept of "suitable", and choose the appropriate sealant according to the actual situation.

Let's look at weather tolerance. Due to the difference in chemical structure, the UV resistance ability of MS glue (main chain structure is C-O and C-C bond), and silicone sealant (main chain is Si-O bond) is slightly insufficient. Under the action of outdoor ultraviolet light, the surface of MS glue will appear a little powder, so MS glue, is generally not recommended for the adhesion of transparent glass that will be directly exposed to the sunlight (ultraviolet light will pass through the glass, destroy the adhesive surface of MS glue and glass). But in stone, metal, concrete and other non-transparent building substrate bonding, MS adhesive bonding surface will not be affected by UV rays, does not affect the sealing waterproof function, and pollution-free.