Foam composition and its uses thereof
The present invention provides a foam composition comprising a polyol, an isocyanate, a first catalyst capable of accelerating a reaction between the polyol and the isocyanate and a second catalyst capable of initiating a reaction between the polyol and the isocyanate at a rate slower than the first catalyst. There is also provided a method for preparing the foam composition.
1. A method for preparing a foam composition for use in fabric laminated foam articles comprising the steps of:
adding at least one polyol;
adding at least one isocyanate; and
adding a catalyst composition,
wherein the catalyst composition comprises a first catalyst composition and a second catalyst composition, the first catalyst composition being capable of accelerating a reaction between the at least one polyol and the at least one isocyanate, and the second catalyst composition being capable of initiating a reaction between the at least one polyol and the at least one isocyanate at a rate slower than the first catalyst composition, wherein the first catalyst composition comprises a first gelling catalyst and a first blowing catalyst and the second catalyst composition comprises a delayed action gelling catalyst and a delayed action blowing catalyst, and wherein the weight ratio of the first gelling catalyst to the delayed action gelling catalyst is in the range 0.1:1 to 15:1, the weight ratio of the first blowing catalyst to the delayed action blowing catalyst is in the range 0.5:1 to 15:1, the weight ratio of the first gelling catalyst to the first blowing catalyst is in the range 2:1 to 25:1, and the weight ratio of the delayed action gelling catalyst to the delayed action blowing catalyst is in the range 0.2:1 to 5:1;
with the proviso that the first gelling catalyst is not a delayed action gelling catalyst and the first blowing catalyst is not a delayed action blowing catalyst.
2. The method according to claim 1 , wherein the second catalyst composition is an organic delayed action catalyst composition.
3. The method according to claim 1 , wherein the first gelling catalyst is selected from the group consisting of: 1,4-diazabicyclo[2.2.2]octane, N-(3-dimethylaminopropyl)-N,N-diisopropanolamine, dibutyl tin dilaurate and stannous octoate.
4. The method according to claim 3 , wherein the delayed action gelling catalyst is formed by reacting the amino group of a gelling catalyst selected from the group consisting of 1,4-diazabicyclo[2.2.2]octane and N-(3-dimethylaminopropyl)-N,N-diisopropanolamine with an acid selected from the group consisting of: 2-hydroxypropionic acid, formic acid and lactic acid, and/or wherein the delayed action blowing catalyst is formed by reacting the amino group of a blowing catalyst with an acid selected from the group consisting of: 2-hydroxypropionic acid, formic acid and lactic acid.
5. The method according to claim 1 , wherein the at least one polyol comprises a difunctional polyol, a tri-functional polyol, a tetra-functional polyol or a combination thereof.
6. The method according to claim 1 , wherein the at least one isocyanate comprises an isocyanate content of about 2.4-49%, and/or wherein the delayed action blowing catalyst is formed by reacting the amino group of a blowing catalyst with an acid selected from the group consisting of: 2-hydroxypropionic acid, formic acid and lactic acid.
7. The method according to claim 1 , further comprising the step of adding at least one surfactant.
8. The method according to claim 1 , further comprising the step of adding at least one blowing agent.
9. The method according to claim 1 , further comprising the step of curing the composition for a pre-determined amount of time to form a foam article.
10. A foam composition for use in fabric laminated foam articles comprising:
at least one polyol;
at least one isocyanate; and
a catalyst composition,
wherein the catalyst composition comprises a first catalyst composition and a second catalyst composition, the first catalyst composition being capable of accelerating a reaction between the at least one polyol and the at least one isocyanate, and the second catalyst composition being capable of initiating a reaction between the at least one polyol and the at least one isocyanate at a rate slower than the first catalyst composition, wherein the first catalyst composition comprises a first gelling catalyst and a first blowing catalyst and the second catalyst composition comprises a delayed action gelling catalyst and a delayed action blowing catalyst, and wherein the weight ratio of the first gelling catalyst to the delayed action gelling catalyst is in the range 0.1:1 to 15:1, the weight ratio of the first blowing catalyst to the delayed action blowing catalyst is in the range 0.5:1 to 15:1, the weight ratio of the first gelling catalyst to the first blowing catalyst is in the range 2:1 to 25:1, and the weight ratio of the delayed action gelling catalyst to the delayed action blowing catalyst is in the range 0.2:1 to 5:1;
with the proviso that the first gelling catalyst is not a delayed action gelling catalyst and the first blowing catalyst is not a delayed action blowing catalyst.
11. The foam composition according to claim 10 , wherein the second catalyst composition is an organic delayed action catalyst composition.
12. The foam composition according to claim 10 , wherein the first gelling catalyst is selected from the group consisting of: 1,4-diazabicyclo[2.2.2]octane, N-(3-dimethylaminopropyl)-N,N-diisopropanolamine, dibutyl tin dilaurate and stannous octoate.
13. The foam composition according to claim 10 , wherein the delayed action gelling catalyst is formed by reaction of a gelling catalyst with an acid selected from the group consisting of: 2-hydroxypropionic acid, formic acid and lactic acid, and/or wherein the delayed action blowing catalyst is formed by reaction of the amino group of a blowing catalyst with an acid selected from the group consisting of: 2-hydroxypropionic acid, formic acid and lactic acid.
14. The foam composition according to claim 10 , wherein the at least one polyol comprises a difunctional polyol, a tri-functional polyol, a tetra-functional polyol or a combination thereof.
15. The foam composition according to claim 10 , wherein the at least one isocyanate comprises an isocyanate content of about 2.4-49%.
16. The foam composition according to claim 10 , further comprising at least one surfactant.
17. The foam composition according to claim 10 , further comprising at least one blowing agent.
18. A method for the manufacture of a fabric laminated foam article comprising the steps of:
contacting a fabric with a first mould;
providing the foam composition according to claim 10 to a second mould;
bringing the first mould and the second mould towards and into each other at a pre-determined rate of impact to enable the fabric to contact the foam composition;
curing the foam composition for a pre-determined period of time to form a foam article; and
removing the foam article.
19. The method according to claim 18 , further comprising a step of trimming the foam article after the removing step.
20. An article of manufacture comprising a fabric laminated foam article manufactured by the method according to claim 18 .
21. The method according to claim 1 , wherein the first blowing catalyst is selected from the group consisting of bis(2-dimethylaminoethyl)ether, N,N-dimethylethanolamine, and N,N,N′-trimethyl-N′-hydroxyethyl-bisaminoethylether.
22. The foam composition according to claim 10 , wherein the first blowing catalyst is selected from the group consisting of bis(2-dimethylaminoethyl)ether, N,N-dimethylethanolamine, and N,N,N′-trimethyl-N′-hydroxyethyl-bisaminoethylether.