Shaped flexible pu foam articles
AssigneeEvonik Operations GmbH
InventorsDaniela HERMANN, Robert BORGOGELLI, Annegret TERHEIDEN
Life of this patent
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Abstract
A shaped flexible hot-cure PU foam article, preferably mattress and/or cushion, may be obtained by reaction of at least one polyol component and at least one isocyanate component in the presence of at least one blowing agent and one or more catalysts that catalyze the isocyanate-polyol and/or isocyanate-water reactions and/or isocyanate trimerization, foam stabilizer, and further additives. The foam stabilizer may include at least one compound of formula (1) [R12R2SiO1/2]a[R13SiO1/2]b[R12SiO2/2]c[R1R2SiO2/2]d[R3SiO3/2]e[SiO4/2]fGg (1).
Claims19
A shaped flexible hot-cure PU foam article, obtained by a process comprising reacting a mixture comprising a polyol component and a isocyanate component in the presence of a component comprising a blowing agent, a catalyst suitable to catalyze an isocyanate-polyol and/or isocyanate-water reactions and/or isocyanate trimerization, a foam stabilizer, and optionally, a further additive,
- wherein the foam stabilizer comprises a compound of formula (1):
- [R12R2SiO1/2]a[R13SiO1/2]b[R12SiO2/2]c[R1R2SiO2/2]d[R3SiO3/2]e[SiO4/2]fGg (1),
- wherein
- a is in a range of from 0 to 12,
- b is in a range of from 0 to 8,
- c is in a range of from 15 to 300,
- d is in a range of from 0 to 40,
- e is in a range of from 0 to 10,
- f is in a range of from 0 to 5,
- g is in a range of from greater than 0 to 3,
- a+b+c+d+e+f+g>23,
- a+b≥2,
- a+d≥1
- wherein G is independently a bridging group of formula (2)
- wherein
- Rx is independently a linear organic, branched organic, an Si containing radical,
- m is independently 1 or 2,
- n is independently 1 or 2,
- n+m=3,
- y1, y2, and y3 are independently 0 or 1,
- y1+y2+y3>0 to 3,
- wherein
- R1 is independently a C1 to C16 alkyl radical, C6 to C16 aryl radical, H,
- R2 is independently a polyether of formula (3), obtained by polymerizing at least one alkylene oxide, or an organic radical of formula (4)
- —R4—O—[C2H4O]i—[C3H6O]j—[CR62CR62O]k—R7 (3),
- —Oh—R8 (4),
- wherein
- h is 0 or 1,
- i is in a range of from 0 to 150,
- j is in a range of from 0 to 150,
- k is in a range of from 0 to 80,
- p in a range of from 1 to 18,
- i+j+k≥3,
- R3 is independently an alkyl radical or aryl radicals, either or which is optionally substituted with one or more hetero atoms,
- R4 is a divalent organic radical,
- R5 is independently a C1 to C16 alkyl radical or C6 to C16 aryl radical,
- R6 is independently a C1 to C16 alkyl radical, optionally comprising an ether or halogen substitution, a C6 to C18 aryl radical, optionally comprising an ether, or H,
- R7 is independently H, alkyl, —C(O)—R9, —C(O)O—R9 or —C(O)NHR9, optionally comprising a hetero atom substitution,
- R8 is independently an alkyl radical or aryl radical, optionally comprising an OH, ether, epoxide, ester, amine or/and halogen,
- R9 is independently a C1 to C16 alkyl radical or C6 to C16 aryl radical.
The article linear polyoxyalkylene oxide polyether, wherein G comprises a (O1/2)nSiR1m-groups that is connected by an organic or Si-comprising radical, and when a difunctional crosslinker is used, G is independently (i), (ii), or (iii)
- (O1/2)nSiR1m—CH2CHR10—R11—CHR10CH2—SiR1m(O1/2)n (i)
- (O1/2)nSiR1m—CH2CHR10—R11—CR10═CH2 (ii)
- (O1/2)nSiR1m—CH2CHR10—R11—CR10═CR10—CH3 (iii)
- with the proviso that the radical (i) is present,
- wherein
- R10 is independently a C1 to C16 alkyl radical, C6 to C16 aryl radical or H,
- R11 is independently a divalent organic radicals, optionally comprising an ether, ester, or amide interruption and optionally comprising an OH or (—SiR12O—)xSiR12,
- x is in a range of from 1 to 50.
Dependencies are inferred from the claim text.