New building materials polyurethane sealant application status

Sealant is a scene filling them , room temperature curing adhesive seams elastic sealing material , is nearly 10 years the rapid development of a new type of building materials, their industrialization encouraged and supported by the State . With modern urban architecture , architectural design and construction technology advances, decoration quality continues to improve, sealant construction and home decoration rapid growth in consumption , a strong impetus to the sealant industry. Especially in the 20th century , 90 years after sealant adhesive wall structure fitted with a structural material , the state "July" , "August " and " Nine Five" research program, have included insulating glass sealant , security ties construction high and low modulus silicone sealant, sealant production equipment and product standardization projects, the state and enterprises gradually increase investment in this area , to form a polyurethane , polysulfide , acrylic , silicone sealants and other emerging industries as the mainstay . At present, China sealant production reached 60,000 tons .
Polyurethane sealant used in construction of the current low price silicone sealant for construction, erosion has exposed concrete , oil leakage pollution, easy tear, you can not paint and other defects, particularly in the precast concrete panels and stone wall joints , airport, bridge concrete and glass fiber reinforced concrete construction and other structural joints watertight seal problem has become more prominent. Polyurethane sealant with tearing, abrasion resistance, puncture , the substrate does not pollute , acid and alkali resistance, organic solvents, paint , stone and concrete for non-corrosion properties , which stand out in the application . Polyurethane sealant has good prospects for development, with the gradual expansion of the construction market , the demand will gradually increase . In addition, polyurethane has a lively isocyanate groups , better cost performance can be modified development of new products. As long as the increased production of polyurethane sealant renovation investment, increase the development, promotion , and constantly develop marketable functional products , China's construction polyurethane sealant production will be substantial growth in recent years .
At present , China's construction sealant products have been adopted ISO11600 " structural sealant · · Classification and requirements " standard, raised 11 levels and the corresponding technical specifications ,tamper seal requirements and test methods , research and development should comply with the relevant sealant modulus and displacement capacity regulations. Polyurethane sealant must enhance their ability to innovate, develop new China already has a silicone sealant , polyurethane, polysulfide , acrylic sealant and other products in the future should be based primarily large enterprises or enterprise groups enhance product innovation, based on the existing stable quality, expand production scale, strengthen and new modified polymer sealant developed highly functional , improving product technology content and added value , promote the construction of new technological developments .