雙組份聚氨酯密封膠廠家@延邊
聚氨酯密封膠（polyurethanesealant）系以聚氨酯橡膠及聚氨酯預聚體為主要成分的密封膠。此類密封膠具有高的拉伸強度、優良的彈性、耐磨性、耐油性和耐寒性，但耐水性，特別是耐堿水性欠佳。可分為加熱硫化型、室溫硫化型和熱熔型三種。其中室溫硫化型又有單組分和雙組分之分。其廣泛用于建筑物、廣場、公路作為嵌縫密封材料，以及汽車制造、玻璃安裝、電子灌裝、潛艇和火箭等的密封。
Polyurethane sealant (polyurethanesealant) is a kind of sealant with polyurethane rubber and polyurethane prepolymer as the main component. This kind of sealant has high tensile strength, good elasticity, abrasion resistance, oil resistance and cold resistance, but its water resistance, especially alkali water resistance is poor. It can be divided into three types: heating vulcanization type, room temperature vulcanization type and hot melt type. Among them, room temperature vulcanization has one component and two components. It is widely used in buildings, squares, roads as caulking sealing materials, sealing and auto manufacturing, installation of glass, electronic filling, submarines and the rockets.
聚氨酯密封膠有如下特點:優良的耐磨性;低溫柔軟性;性能可調節范圍較廣;機械強度大;粘接性好;彈性好，具有優良復原性，可適合于動態接縫;耐候性好，使用壽命可達15~20年;耐油性能優良;耐生物老化;價格適中。
Polyurethane sealant has the following characteristics: excellent wear resistance; soft performance; adjustable wide range; high mechanical strength; good adhesion; good elasticity, excellent resilience, can be suitable for the dynamic joint; good weather resistance, service life can reach 15~20 years; excellent oil resistance; resistance to biological aging; moderate price.
聚氨酯密封膠也有一些缺點。如:不能*耐熱;淺色配方容易受紫外光老化;單組分膠貯存穩定性受包裝及外界影響較大，通常固化較慢;高溫熱環境下可能產生氣泡和裂紋;許多場合需要底涂。同時聚氨酯密封膠耐水性也較差，特別是耐堿水性欠佳。
Polyurethane sealant also has some disadvantages. Such as: not long-term heat; light formula vulnerable to UV aging; single component storage stability by packaging and external influence, usually curing slowly; may produce bubbles and cracks under high temperature environment; many occasions need primer. At the same time, polyurethane sealant is also poor in water resistance, especially alkali resistance.
聚氨酯密封膠的主要用途是土木建筑業、交通運輸業等。如在日本，約75~80%的聚氨酯密封膠用于建筑，15%用于汽車、機械制造等，5%用于土木及其它方面。
The main use of polyurethane sealant is civil construction industry, transportation industry and so on. In Japan, about 75~80% polyurethane sealants are used in buildings, 15% for autos, machinery manufacturing, 5% for civil engineering and other aspects.
在建筑方面的具體應用有:混凝土預制件等建材的連接及施工縫的填充密封，門窗的木框四周及墻的混凝土之間的密封嵌縫，建筑物上輕質結構(如幕墻)的粘貼嵌縫，陽臺、游泳池、浴室等設施的防水嵌縫，空調及其它體系連接處的密封，隔熱雙層玻璃、隔熱窗框的密封等。
The specific application in the aspects of Architecture: connection and construction joints of precast concrete and other building materials filling sealing, sealing caulking between wood frame and wall around the doors and windows of concrete buildings, lightweight structures (such as curtain wall) paste glue, balcony, swimming pool, bathroom waterproof sealing facilities, air conditioning and sealing other system joints, insulation double-layer glass, heat insulation window seal.
聚氨酯密封膠在汽車方面的應用有:車窗(主要是風擋玻璃)的裝配密封，車身與其它部件的裝配等。
The application of polyurethane sealant in auto is: the assembly seal of window (mainly windshield), the assembly of body and other parts, etc..
在土木方面，聚氨酯密封膠用于高等級道路、橋梁、飛機跑道等有伸縮性接縫的嵌縫密封及混凝土、陶質、PVC等材質的下水道、地下煤氣管道、電線電路管道等管道接頭處的連接密封，地鐵隧道及其它地下隧道連接處的密封等。
In civil engineering, polyurethane sealant used in high-grade roads, bridges and runways flexible joints and caulking sealing concrete, ceramic and PVC materials such as sewers and underground gas pipes, wire circuit conduit connection sealing, subway tunnels and other underground tunnel sealing joints etc..
聚氨酯密封膠還可用于電纜(如地下電纜)的柔性接頭、電子元器件的灌封，以防塵抗震;用于隔熱體系如冷藏車、冷庫保溫層及低溫容器的粘接密封等等。
Polyurethane sealant can also be used for cable (such as underground cable) encapsulated flexible joint, electronic components, with dust-proof insulation system for seismic; bonding such as refrigerator car, cold storage insulation layer and cryogenic vessel sealing etc..
