Do You Really Know Modified Silane Polymer Sealant?

MS Polymer Sealant is the abbreviation of silane modified polyether adhesive, mainly based on MS polymer polymer, with fillers, plasticizers and other functional additives made of one component or two component elastic sealant, is a new generation of building sealant developed after silicone adhesive (SR), polyurethane adhesive (PU). 

The Development of MS Polymer Sealant

In 1979, Kaneka developed the silicone modified polyether sealant (also known as end-silyl polyether sealant) base polymer.

In 1980, the Japanese Kaneka company was the first to prepare an elastic sealant with silane polyether as the base material, and began to promote its application in large buildings and high-end buildings in 1981.

After 1982, Japan, the United States and European countries competed to study the silyl polyether base polymer and its elastic sealant and elastic adhesive, which promoted the rapid development of MS adhesive.

In recent years, MS adhesive has emerged, production enterprises have been increasing, and related technologies have made rapid progress, occupying an increasing share of the world building sealant market.

The Components of MS Polymer Sealant

The main raw materials of MS polymer adhesive include: terminal alkyl polyether (MS prepolymer), plasticizer (dioctyl phthalate, referred to as DOP; Dibenzyl phthalate, abbreviated DCP; Dibutyl phthalate, referred to as DBP, etc.), fumed white carbon black, silane coupling agent, catalyst, silane coupling agent, anti-aging additives, water removal agent, etc.

The Characteristics of MS Polymer Sealant

Due to the low surface energy and high permeability of the base polymer (end-silyl polyether), MS polymer adhesive has good wetting ability for most inorganic, metal and plastic substrates, and thus produces good adhesion to the substrate

The long chain of polyether is characterized by low unsaturation, high molecular weight and narrow distribution, and the end group is a hydrolyzed siloxane group. When MS adhesive is cured at room temperature and humidity, it forms a network structure connected by flexible polyether long chain with Si-O-Si bond as the crosslinking point. This system not only has excellent weather resistance, water resistance, aging resistance and durability, but also can effectively inhibit and avoid surface cracks after long-term use of sealant.

Terminal silyl polyether is a silanoxy-terminated polyether with a long chain structure, which does not contain toxic isocyanate groups and dissociated cyanate esters like PU. Terminal silyl polyether has low viscosity and good workability, and it is not necessary to use organic solvents to adjust the process handling performance of the formulation. Therefore, MS adhesive can be completely done without adding any organic solvent, and its total volatile organic matter (VOC) is very low.

The surface of ordinary silicone sealant can not be painted, and can only be adjusted to the color required by the user according to the needs of the user; The silane modified polyether adhesive can be painted and painted, and has good coating property.

Mainly used in construction engineering and decoration of bonding, caulking, joint, sealing, waterproof, reinforcing and other fields. With the deepening of people's understanding of the advantages of MS adhesive, its application in the refrigerated truck, container, elevator industry is also expanding.