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US 11,078,322 B2Granted
Non-hot-melt MDI-based polyurethane composition bearing NCO end groups and having a low content of MDI monomer, comprising at least one isocyanate compound of particular molar volume
AssigneeBostik SA
InventorFederico Sanz
Life of this patent
Estimating the term…
Abstract
1) Polyurethane composition comprising: a) at least 98% by weight of at least one non-hot-melt polyurethane bearing NCO end groups based on diphenyl methane diisocyanates (MDI), b) a MDI monomer content of less than or equal to 1% by weight, c) at least one particular isocyanate compound with a molar volume of less than or equal to 300 millilitres per mole. 2) Process for preparing a polyurethane composition as defined previously, and an adhesive, mastic and/or surface coating composition formulated from such a polyurethane composition.
Claims8
A polyurethane composition comprising:
- a) at least 98% by weight of at least one non-hot-melt polyurethane bearing NCO end groups based on diphenylmethane diisocyanate (MDI), which polyurethane is not solid at a temperature ranging from 5 to 35° C., and has a MDI content of less than or equal to 1% by weight relative to the weight of the polyurethane composition,
- b) at least one isocyanate compound with a molar volume of less than or equal to 300 millilitres per mole (mL/mol), noted compound A, in which the isocyanate group or groups are not linked to a carbon atom of an aromatic hydrocarbon-based ring,
- the weight percentages being expressed relative to the total weight of the polyurethane composition.
A composition comprising:
- a) at least 98% by weight of at least one non-hot-melt polyurethane bearing NCO end groups based on diphenylmethane diisocyanate noted MDI
- b) a content of MDI monomer of less than or equal to 1% by weight,
- c) at least one isocyanate compound with a molar volume of less than or equal to 300 millilitres per mole noted compound A, which compound is different from MDI and in which the isocyanate group or groups are not linked to a carbon atom of an aromatic hydrocarbon-based ring,
- the weight percentages being expressed relative to the total weight of the polyurethane composition.
1 more element
A composition comprising:
- a) at least 98% by weight of at least one non-hot-melt polyurethane bearing NCO end groups based on diphenylmethane diisocyanate noted MDI
- b) a content of MDI monomer of less than or equal to 1% by weight,
- c) at least one isocyanate compound with a molar volume of less than or equal to 300 millilitres per mole noted compound A, in which the isocyanate group or groups are not linked to a carbon atom of an aromatic hydrocarbon-based ring, compound A being an aliphatic, acyclic, linear or branched monoisocyanate, benzyl monoisocyanate, cycloaliphatic monoisocyanate, benzyl diisocyanate, cycloaliphatic diisocyanate, or a linear or branched acyclic aliphatic diisocyanate,
- the weight percentages being expressed relative to the total weight of the polyurethane composition, said process.
1 more element
Dependencies are inferred from the claim text.