Moisture curable compositions
A two part moisture curing composition, exhibiting low thermal conductivity, has a part A) and a part B). Part A) comprises either: 1) a siloxane polymer (I) having at least two terminal hydroxyl or hydrolysable groups and a viscosity of from 20,000 to 40,000 mPa·s at 25° C.; or 2) a polymer mixture...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
21.07.2020
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Subjects | |
Online Access | Get full text |
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Summary: | A two part moisture curing composition, exhibiting low thermal conductivity, has a part A) and a part B). Part A) comprises either: 1) a siloxane polymer (I) having at least two terminal hydroxyl or hydrolysable groups and a viscosity of from 20,000 to 40,000 mPa·s at 25° C.; or 2) a polymer mixture (II) of polymer (i) a siloxane polymer having at least two terminal hydroxyl or hydrolysable groups and a viscosity≥25,000 mPa·s at 25° C., and polymer (ii) a siloxane polymer having at least two terminal hydroxyl or hydrolysable groups and a viscosity of between 1,000 and 20,000 mPa·s at 25° C. Part A) further comprises a reinforcing filler and a low-density filler, the total filler content being between 30 and 45% in volume of the total composition. Part B) comprises a moisture curing agent formulation comprising a tin based catalyst and one or more crosslinkers. |
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Bibliography: | Application Number: US201716085758 |