Polyisocyanates having alkyl, silyl, siloxane, and carbamate groups and preparing method thereof
OwnerJae-Suk Lee, Jun-Hwan Ahn +1inventors
InventorsJae-Suk Lee, Jun-Hwan Ahn, Yeong-Deuk Shin
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Abstract
The present invention relates to polyisocyanates having various functional groups and a preparing method thereof. More particularly, the present invention is to prepare polyisocyantes by living anion polymerization under suitable temperature and pressure enough to protect metal ions to prevent from the formation of trimer of the isocyanate through depolymerization and thus provide polyisocyanates having alkyl, silyl, siloxane and carbamate groups with desirable molecular weight, molecular weight distribution and improved physical properties.
Claims4
Polyisocyanates having various functional groups by living anion polymerization of isocyanate monomer expressed by the following formula (1), an initiator, tetrahydrofuran (THF), and common ion salt under high vacuum at extremely low temperature for 5-150 minutes,
- 3
- wherein R is —(CH2)nR1, —(CH2)3SiR3, —((CH2)3SiR2OSiR3, —(CH2)3SiR2OSiR2OSiR3, —(CH2)nNHCOOR4;
- n is an integer of 1 to 12;
- R1, R2, R3, R4=methyl, ethyl, propyl, butyl or pentyl.
Dependencies are inferred from the claim text.