Building sealant composition
AssigneeBridgestone Corporation
InventorsYakayuki Yako, Jason Poulton, Yuan-Yong Yan
Life of this patent
Estimating the term…
Abstract
A curable sealant composition is provided. The composition includes a polymer including at least conjugated dime contributed monomer units in a backbone of the polymer and terminal groups including silicon. The composition also includes additional sealant ingredients selected from the group consisting of plasticizers, filler, reinforcing agents, modifiers, curing catalysts/hardeners, stabilizers, and mixtures thereof.
Claims24
1-14. (canceled)
A curable sealant composition comprising the reaction product of:
- a) a polymer comprising conjugated diene monomer units in a backbone of said polymer, and
- b) a silicon containing functional group, wherein said functional group forms a terminal group on said polymer and further wherein the polymer has a 1,2-microstructure content of about 40-70%, a weight average molecular weight (Mw) of about 10,000-60,000 and a polydispersity of less than about 1.8.
A process for forming a curable sealant comprising:
- a) forming a polymer having a 1,2-microstructure content of about 40-70%, a weight average molecular weight (Mw) of about 10,000-60,000, and a polydispersity of less than 1.8 by
- i) initiating a living polymerization of conjugated diene monomers with a multi-functional initiator present in an amount of about 0.001 to 0.1 moles per 100 grams conjugated diene monomer, and
- ii) terminating said polymerization with a tetra-substituted silicon, and
- c) combining the polymer with one or more sealant ingredients selected from the group consisting of plasticizers, fillers, reinforcing agents, modifiers, curing catalysts/hardeners, stabilizers, and mixtures thereof.
A curable sealant composition comprising the reaction product of:
- a) a polymer comprising conjugated diene monomer units in a backbone of said polymer, and
- b. at least one functional group including silicon and an alkoxy group, wherein said functional group forms a terminal group on said polymer and further wherein the polymer has a 1,2-microstructure content of about 40-70%, a weight average molecular weight (Mw) of about 10,000-60,000 and a polydispersity of less than about 1.8.
A curable sealant composition comprising:
- a) a polymer including at least conjugated diene contributed monomer units in a backbone of said polymer, and
- b. terminal groups including silicon, wherein the polymer has a 1,2-microstructure content of about 40-70%, a weight average molecular weight (Mw) of about 10,000-60,000 and a polydispersity of less than about 1.8.
Dependencies are inferred from the claim text.