Isocyanate-epoxide hybrid resins
AssigneeBASF SE
InventorsFrank Prissok, Andre Kamm
Life of this patent
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Abstract
The present invention relates to a method for producing at least one resin, which comprises mixing at least one polyisocyanate with at least one polyepoxide, the reaction taking place in the presence of a catalyst system based on at least one metal-free Lewis base having at least one nitrogen atom, and also to resins obtainable by a method of the invention, and to the use of a resin obtainable by a method of the invention, or of a resin of the invention, for producing seals, for producing components for rotor blades, boat hulls, or vehicle body parts, or for coatings.
Claims14
A method for producing a resin, the method comprising:
- (i) mixing at least one polyisocyanate with at least one polyepoxide in the presence of a metal-free catalyst system comprising at least one of 1,8-diazabicyclo-5,4,0-undecen-7-ene and a blocked 1,8-diazabicyclo-5,4,0-undecen-7-ene;
- (ii) delivering the mixture (I) into a mold or to a desired reaction site by pouring, spraying, or distributing;
- and
- (iii) heating the mixture (I) to a temperature in a range of from 70 to less than 100° C. until the mixture is cured,
- wherein the content of the catalyst system is is from 0.001 to 1 wt%, based on the sum of the polyisocyanate and polysepoxide of the mixture,
- no hydrogen-acidic compounds are added in said mixing and
- the equivalent ratio of the at least one polyisocyanate to the at least one polyepoxide is from 7.5:1 to 5000:1.
A resin, obtained by a method comprising:
- (i) mixing at least one polyisocyanate with at least one polyepoxide in the presence of a metal-free catalyst system comprising at least one of 1,8-diazabicyclo-5,4,0-undecen-7-ene and a blocked 1,8-diazabicyclo-5,4,0-undecen-7-ene;
- (ii) delivering the mixture (I) into a mold or to a desired reaction site by pouring, spraying, or distributing;
- and
- (iii) heating the mixture (I) to a temperature in a range from 70 to less than 100° C. until the mixture is cured,
- wherein the content of the catalyst system is is from 0.001 to 1 wt %, based on the sum of the polyisocyanate and polyepoxide of the mixture, and
- the equivalent ratio of the at least one polyisocyanate to the at least one polyepoxide is from 7.5:1 to 5000:1.
Dependencies are inferred from the claim text.