Shaped PU foam articles
Shaped PU foam articles, preferably mattresses and/or cushions, wherein the polyurethane foam has been obtained by reaction of at least one polyol component and at least one isocyanate component in the presence of at least one compound of formula (1a) and at least one compound of formula (1b) and at least one blowing agent, are described.
1 . A shaped polyurethane foam article, wherein the shaped polyurethane foam article has been obtained by reaction of at least one polyol component and at least one isocyanate component in the presence of a compound (1a) and at least one compound of formula (1b) and at least one blowing agent,
wherein formula (1b) is defined as follows:
wherein in formula (1b):
X represents nitrogen, amines of formula NR 3 R 4 , urea of formula N(R 5 )C(O)N(R 6 ) or urea of formula N(R 5 )C(O)NR 6 R 7 ,
Y represents an amine group of formula NR 8 R 9 or an ether group of formula OR 9 ,
R 1 and R 2 represent identical or different hydrocarbon radicals having 1 or 3 carbon atoms optionally bearing an OH group,
R 3 and R 4 represent hydrogen or methyl,
R 5 , R 6 and R 7 represent hydrogen, and
R 8 and R 9 represent methyl,
m=3,
n=3,
i=0 to 2,
wherein at least one of the groups X, Y, OF R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 , bears a functionality which is reactive with a component which forms the polyurethane matrix,
based on its starting volume the shaped polyurethane foam article is compressed by at least 30% and kept in compressed form by an auxiliary means for at least 20 hours said compound (1a) is N, N, N′-trimethyl-N′-(3-aminopropyl) bis (aminoethyl) ether and
said shaped polyurethane foam article has a rebound resilience of 1 to <10%, measured in accordance with DIN EN ISO 8307:2008-03.
2 . The shaped polyurethane foam article according to claim 1 , wherein the shaped polyurethane foam article is the flexible polyurethane foam and
wherein based on its starting volume the shaped polyurethane foam article is compressed by at least 60% and kept in compressed form by an auxiliary means for at least 20 hours.
3 . The shaped polyurethane foam article according to claim 2 , wherein a flexible polyurethane foam has a foam density of 5 to 150 kg/m 3 and/or a porosity, optionally after crushing the flexible polyurethane foam article, of 1 to 250 mm, water column.
4 . The shaped polyurethane foam article according to claim 2 , wherein the flexible polyurethane foam has a compressive strength CLD, 40% in accordance with DIN EN ISO 3386-1:2015-10, of 0.1 to 8.0 kPa.
5 . The shaped polyurethane foam article according to claim 2 , wherein the flexible polyurethane foam is a hot-cured flexible polyurethane foam having a compressive strength CLD, 40% in accordance with DIN EN ISO 3386-1:2015-10, of 2.0-8.0 kPa, and/or a foam density of 8 to 80 kg/m 3 and/or a porosity of 1 to 250 mm, water column.
6 . The shaped polyurethane foam article according to claim 2 , wherein the flexible polyurethane foam is a viscoelastic flexible polyurethane foam and has a glass transition temperature between −20° C. and +15° C. and/or a compressive strength CLD, 40% in accordance with DIN EN ISO 3386-1:2015-10, of 0.1-5.0 kPa, and/or a foam density of 30 to 130 kg/m 3 and/or a porosity, after crushing the foam, of 1 to 250 mm water column.
7 . The shaped polyurethane foam article according to claim 1 , wherein the shaped polyurethane foam article has a height of from at least 1 cm to not more than 50 cm and a width of from at least 20 cm to not more than 300 cm, and a length of from at least 20 cm to not more than 300 cm.
8 . The shaped polyurethane foam article according to claim 1 , wherein the shaped polyurethane foam article is in a compressed and a vacuum-packed state.
9 . The shaped polyurethane foam article according to claim 8 , wherein the shaped polyurethane foam article is a rollup mattress.
10 . A process for storing and/or for transporting the shaped polyurethane foam article as set forth in claim 1 ,
wherein
(d) in a first step a shaped polyurethane foam article is provided by reacting of at least one polyol component and at least one isocyanate component in the presence of the compound (1a) and at least one compound of formula (1b), and the at least one blowing agent,
(e) in optional subsequent steps further processing the obtained shaped foam article,
(f) and wherein in a final step compressing the shaped polyurethane foam article by at least 20%, based on its starting volume and optionally vacuum packing the shaped polyurethane foam article, followed by keeping the shaped polyurethane foam article in compressed form by auxiliary means, and storing and/or transporting the shaped polyurethane foam article.
11 . A mattress comprising the shaped polyurethane foam article as set forth in claim 1 .
12 . The shaped polyurethane foam article according to claim 1 , wherein in formula (1b):
X is selected from the group consisting of a urea N(R 5 )C(O)NR 6 R 7 or nitrogen,
Y represents NR 8 R 9 , where R 8 and R 9 =methyl,
R 1 and R 2 is selected from the group consisting of methyl, ethyl, iso-propyl, —C 2 H 3 (OH)CH 3 or —C 2 H 4 OH,
m=3
n=3,
i=0 to 2,
wherein at least one of the groups X, Y, R 1 and R 2 bears an isocyanate-reactive functionality reactive with a component which forms the polyurethane matrix.
13 . The shaped polyurethane foam article according to claim 1 , wherein in formula (1b):
X is selected from the group consisting of a urea N(R 5 )C(O)NR 6 R 7 or nitrogen,
Y represents NR 8 R 9 , where R 8 and R 9 =methyl,
R 1 and R 2 are methyl,
R 5 , R 6 and R 7 are hydrogen,
m=3,
n=3,
i=1 or 2,
wherein at least one of the groups X or Y bears a NH or OH functionality reactive with a component which forms the polyurethane matrix.
14 . The shaped polyurethane foam article according to claim 1 , wherein in formula (1b):
X is selected from the group consisting of a urea N(R 5 )C(O)NR 6 R 7 or nitrogen,
Y represents —NR 8 R 9 , where R 8 and R 9 =methyl,
R 1 and R 2 are methyl,
R 5 , R 6 and R 7 are hydrogen,
m=3,
n=3,
i=1 or 2,
wherein at least one of the groups X, Y, R 5 , R 6 and R 7 bears a NH or OH functionality reactive with a component which forms the polyurethane matrix.
15 . The shaped polyurethane foam article according to claim 1 , wherein the shaped polyurethane foam article has a foam density of 5 to 150 kg/m 3 and/or a porosity, after crushing the shaped polyurethane foam article, of 1 to 50 mm, water column.
16 . The shaped polyurethane foam article according to claim 1 , wherein the shaped polyurethane foam article has a height of from at least 1 cm to not more than 50 cm and a width of from at least 70 cm to not more than 200 cm, and a length of from at least 150 cm to not more than 220 cm.
17 . The shaped polyurethane foam article according to claim 1 , wherein said at least one compound of formula (1b) is at least one selected from the group consisting of 1,3-bis[3-(dimethylamino)propyl]urea and (N,N-dimethylamino-propylamine).