Dow Silicones Corporation

Dow Global Technolgoies LLC

David M Hagan

Bizhong Zhu

Eric Jude Joffre

William Hoy Heath

Brian Harkness

Martin Grasmann

William Johnson

Stephen Michael Hlinka, Ii

Bindu Krishnan

Qiuyun Xu

Frederic Gubbels

Eric E Joffre

Jeanette Young

Angela L Stringer

Stephen Michael Ii Hlinka

Steve Hlinka Ii

Steve Hlinka

A silicone-polyether copolymer has the formula X[ZY], where each X is an independently selected silicone moiety having a particular structure, each Y is an independently selected polyether moiety, each Z is an independently selected siloxane moiety, subscript c is from 1 to 150, subscript g is &#x3e;1, and each subscript j and o are independently &#x3e;0 and &#x3c;2, with the proviso that j+o=2 in each moiety indicated by subscript c. A method of preparing the silicone-polyether copolymer is also disclosed, and comprises reacting a polyether compound, a chain extending organosilicon compound, and an endcapping organosilicon compound in the presence of a hydrosilylation catalyst. A sealant is also disclosed, the sealant comprising the silicone-polyether copolymer and a condensation-reaction catalyst.

Silicone-polyether copolymer, sealants comprising same, and related methods

An isocyanate-functional silicone-polyether copolymer having a particular structure is disclosed. A method of preparing the isocyanate-functional silicone-polyether copolymer is also disclosed, the method comprising reacting a polyether compound and an organosilicon compound to give the isocyanate-functional silicone-polyether copolymer. A silicone-polyether-urethane copolymer formed therewith, as well as a method of preparing the silicone-polyether-urethane copolymer, are also disclosed. Sealants comprising the isocyanate-functional silicone-polyether copolymer and/or the silicone-polyether-urethane copolymer are further disclosed.

Isocyanate-functional silicone-polyether copolymer, silicone-polyether-urethane copolymer formed therewith, sealants comprising same, and related methods

A silicone-polyether copolymer has the formula X&#x2014;Y, where X is a silicone moiety having a particular structure and Y is a polyether moiety. An isocyanate-functional silicone-polyether copolymer formed therewith is also disclosed. Further, a silicone-polyether-urethane copolymer formed with the isocyanate-functional silicone-polyether copolymer is disclosed. Related methods of preparation as well as sealants and cured products thereof are further disclosed.

Silicone-polyether copolymer, isocyanate-functional silicone-polyether copolymer formed therewith, silicone-polyether-urethane copolymer, sealants comprising same, and related methods

A silicone-polyether copolymer has the formula X&#x2014;Y, where each X is an independently selected silicone moiety having a particular structure, Y is a linear or branched polyether moiety, and subscript g is on average more than 1. A method of preparing the silicone-polyether copolymer comprising reacting a polyether compound and an organosilicon compound in the presence of a hydrosilylation-reaction catalyst. A sealant is also disclosed, the sealant comprising the silicone-polyether copolymer and a condensation-reaction catalyst.

Silicone-polyether copolymer, method of preparing same, and sealant comprising same

A moisture curable composition comprises: (A) a polymer containing reactive hydroxyl or hydrolysable groups bonded to silicon which groups are reactive in the presence of moisture; (B) a crosslinking agent comprising at least two groups reactive with the silicon-bonded hydroxyl or hydrolysable groups of polymer (A); (C) one or more reinforcing and/or non-reinforcing fillers; and (D) a silane having the structure (R)(Y)Si&#x2014;Z-G-Z&#x2014;Si(R)(Y). Rand Rare alkoxy groups containing from 1 to 6 carbons, Yand Yare alkyl groups containing from 1 to 8 carbons, Zand Zare alkylene groups having from 1 to 12 carbons, Gis a chemical group containing a heteroatom with a lone pair of electrons, and m and q are independently 1, 2 or 3. Silane (D) is present in an amount of from 15 to 30% by weight of the composition and functions as a cure catalyst.

Moisture curable compositions

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Birch Run, MI, United States of America

David M Hagan