Production of polyurethane foam
AssigneeEvonik Operations GmbH
InventorMartin Glos
Life of this patent
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Abstract
Compositions suitable for production of polyurethane foams, comprising at least one OH-functional compound (OHC) obtainable by the partial or complete hydrogenation of ketone-aldehyde resins, wherein the OH-functional compound contains at least one structural element of the formula (1a) and optionally of the formulae (1b) and/or (1c), with R=aromatic with 6-14 carbon atoms, (cyclo)aliphatic with 1-12 carbon atoms, R1=H, CH2OH, R2=H, or a radical of the formula —(CH2—CH(R′)O—)y—H where R′ is hydrogen, methyl, ethyl or phenyl and y=1 to 50, k=2 to 15, preferably 3 to 12, more preferably 4 to 11, m=0 to 13, preferably 0 to 9, l=0 to 2, where the sum of k+l+m is from 5 to 15, preferably from 5 to 12, and k>m, are described.
Claims18
A rigid polyurethane foam comprising at least one isocyanate component, a polyol component, a catalyst which catalyzes the formation of a urethane or isocyanurate bond, and a blowing agent,
- wherein the rigid polyurethane foam further comprises at least one OH-functional compound (OHC) from the partial or complete hydrogenation of ketone-aldehyde resins in the amount of by mass of at least 35 parts (pphp) based on 100 parts (pphp) of the polyol component, wherein this OH-functional compound contains at least one structural element of the formula (1 a) and of the formulae (1b) and/or (1c),
- with
- R is aromatic hydrocarbyl radical having 6-14 carbon atoms or (cyclo)aliphatic hydrocarbyl radical having 1-12 carbon atoms, where the hydrocarbyl radicals may be substituted,
- R1 is H, or CH2OH,
- R2 is H, or a radical of the formula —(CH2—CH(R′)O—)y—H,
- wherein R′ is hydrogen, methyl, ethyl or phenyl and y=1 to 50,
- k is from 2 to 15,
- m is from 0 to 13,
- 1 is from 0 to 2,
- where the sum of k+1+m is from 5 to 15, and k >m,
- wherein at least 90 parts by weight of the polyols present have an OH number of greater than 100, based on 100 parts by weight of polyol components.
A process for producing a rigid polyurethane foam by reacting one or more polyol components with one or more isocyanate components, wherein the reaction is effected in the presence of at least one OH-functional compound (OHC) obtained by the partial or full hydrogenation of ketone-aldehyde resins in the amount of by mass of 35 parts (pphp) based on 100 parts (pphp) of the polyol component, where this OH—functional compound contains at least one structural element of the formula (1a) and of the formulae (1b) and/or (1c)
- wherein
- R is aromatic hydrocarbyl radical having 6-14 carbon atoms or (cyclo)aliphatic hydrocarbyl radical having 1-12 carbon atoms,
- R1 is H, or CH2OH,
- R2 is H, or a radical of the formula —(CH2—CH(R′)O—)y—H,
- wherein R′ is hydrogen, methyl, ethyl or phenyl and y=1 to 50,
- k is from 2 to 15,
- m is from 0 to 13,
- 1 is from 0 to 2,
- wherein the sum of k+1+m is from 5 to 15, and k >m,
- wherein at least 90 parts by weight of the polyols used, have an OH number of greater than 150, based on 100 parts by weight of polyol components.
Dependencies are inferred from the claim text.