One-component polyurethane sealant composition, article thereof and method for manufacturing the same
OwnerYaLong Qi, HongYu Chuinventors
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Abstract
The invention relates to a one-component moisture-curable polyurethane sealant composition comprises an isocyanate terminated polyurethane prepolymer, NCO group content of the isocyanate-terminated polyurethane prepolymer being 1.8-4.0 wt. %, based on the total weight of the isocyanate terminated polyurethane prepolymer, an effective amount of crosslinker, the functionality of the crosslinker being 3, an effective amount of catalyst, and a silane coupling agent, the mole ratio of the silane coupling agent to the NCO group of the isocyanate terminated polyurethane prepolymer being 40:100 to 120:100.
Claims16
A one-component polyurethane sealant composition comprises:
- a) an isocyanate terminated polyurethane prepolymer, NCO group content of the isocyanate-terminated polyurethane prepolymer being 1.8-4.0 wt. %, based on the total weight of the isocyanate terminated polyurethane prepolymer,
- b) a crosslinker having a functionality of 3,
- c) an effective amount of catalyst, and
- d) a silane coupling agent, the mole ratio of the —Si—O-A group of the silane coupling agent to the NCO group of the isocyanate terminated polyurethane prepolymer being 40:100 to 120:100, the silane coupling agent being represented by the following formulas:
- wherein, independently,
- 1A, 2A, may be the same or different, and each is C1-C10, linear or branched, aliphatic or alicyclic or substituted alicyclic or aromatic hydrocarbons,
- 3A is a linear or branched, aliphatic or alicyclic or substituted alicyclic or aromatic divalent hydrocarbon residue having 1 to 20 carbon atoms,
- 4A, 5A, may be the same or different, and each representing a linear or branched alkyl group having 1 to 5 carbon atoms,
- n is an integer of 0 to 2.
Dependencies are inferred from the claim text.