Bismuth-catalyzed polyurethane composition
AssigneeSika Technology AG
InventorsUrs Burckhardt, Andreas Diener
Life of this patent
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Abstract
A one-component polyurethane composition includes at least one polyurethane prepolymer having terminal isocyanate groups which is prepared from at least one polyisocyanate and at least one polyol, and to at least one catalyst system which is obtainable from at least one bismuth compound and at least one aromatic nitrogen compound. The polyurethane composition may be used as an adhesive, sealant, coating or lining. Finally, catalysts for polyurethane compositions are disclosed which represent coordination compounds between bismuth and at least one aromatic nitrogen compound.
Claims19
A one-part polyurethane prepolymer composition comprising, in a single part,
- at least one polyurethane prepolymer having terminal isocyanate groups, prepared from at least one polyisocyanate with at least one polyol;
- and
- at least one catalyst system obtained from components consisting of one bismuth compound and one aromatic nitrogen compound, wherein the aromatic nitrogen compound is coordinatively bonded with bismuth, and the aromatic nitrogen compound has the formula A or B,
- where:
- R1, R2, R3, R4, R5 and R6 each independently of one another is H, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, C5 to C12 alkyl, COOH, COOR′ or halogen,
- R7 is a C1 to C8 alkyl, a hydroxyl group (OH), O—(CH2CH2O)x—R′ with the values for x of 1-6, or O—(CH2CH(CH3)O)x—R′ or a positional isomer thereof, with the values for x of 1-6,
- R8 is alkylene or alkylene ether,
- R′ is alkyl, and
- R″ is alkyl or alkyl with heteroatoms.
A catalyst for polyurethane compositions, wherein the catalyst is a coordination compound between bismuth and an aromatic nitrogen compound of the formula A or B,
- where
- R1, R2, R3, R4, R5 and R6 each independently of one another is H, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, C5 to C12 alkyl, COOH, COOR′ or halogen,
- R7 is a C1 to C8 alkyl, a hydroxyl group (OH), O—(CH2CH2O)x—R′ with the values for x of 1-6, or O—(CH2CH(CH3)O)x—R′ or a positional isomer thereof, with the values for x of 1-6,
- R8 is alkylene or alkylene ether,
- R′ is alkyl, and
- R″ is alkyl or alkyl with heteroatoms.
A catalyst for polyurethane compositions, wherein the catalyst is a coordination compound between bismuth and 8-hydroxyquinoline or between bismuth and tetraethylene glycol bis(8-quinolyl) ether.
A one-part polyurethane prepolymer composition comprising, in a single part,
- at least one polyurethane prepolymer having terminal isocyanate groups, prepared from at least one polyisocyanate with at least one polyol;
- and
- a catalyst system consisting of a catalyst obtained from components consisting of one bismuth compound and one aromatic nitrogen compound, wherein the aromatic nitrogen compound has the formula A or B,
- where:
- R1, R2, R3, R4, R5 and R6 each independently of one another is H, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, C5 to C12 alkyl, COOH, COOR′ or halogen,
- R7 is a C1 to C8 alkyl, O—(CH2CH2O)x—R′ with the values for x of 1-6, or O—(CH2CH(CH3)O)x—R′ or a positional isomer thereof, with the values for x of 1-6,
- R8 is alkylene or alkylene ether,
- R′ is alkyl, and
- R″ is alkyl or alkyl with heteroatoms.
Dependencies are inferred from the claim text.