Back to results
US 2003/0149167 A1Published application
Heat and hot water resistant polyurethane sealant
AssigneeNational University of Singapore
InventorsYit Lin Chew, Suat Hong Goh, Xu Zhou
Life of this patent
Estimating the term…
Abstract
A two-component polyurethane sealant composition is described. The polyurethane sealant of the invention exhibits improved resistance to degradation by heat and hot water. The composition of the invention includes a novel hindered amine antioxidant.
Claims17
A polyurethane sealant composition comprising a component A and a component B, wherein
- component A comprises a hydrophobic polyether diol, a cross-linker and an antioxidant of the formula I:
- 3
- and component B comprises a polyisocyanate curing agent.
A polyurethane sealant composition comprising a component A and a component B, wherein
- component A comprises
- i) a hydrophobic polyether diol having a number average molecular weight of 2000 to 4000 daltons that is present in an amount of 20 to 60 wt % of component A,
- ii) a cross-linker selected from the group consisting of polypropylene glycol triol having a number average molecular weight of 1000 to 3000, N,N,N′,N′tetrakis(2-hydroxypropyl)ethylenediamine and a mixture of polypropylene glycol triol having a number average molecular weight of 1000 to 3000 and N,N,N′,N′tetrakis(2-hydroxypropyl)ethylenediamine, and
- iii) an antioxidant;
- and component B comprises a polyisocyanate curing agent.
2 more elements
Dependencies are inferred from the claim text.