1. A composition for polyurethane foam comprising a premixed polyol and isocyanate, and further comprising at least one among a silane precursor and polysilsesquioxane.
2. The composition according to claim 1, wherein the premixed polyol comprises a polyol, a catalyst, a surfactant, and a foaming agent.
3. The composition according to claim 1, wherein the composition comprises 100 parts by weight of polyol, 1 to 99 parts by weight of a silane precursor or polysilsesquioxane, 101 to 150 parts by weight of isocyanate, 0.1 to 50 parts by weight of a catalyst, 0.1 to 50 parts by weight of a surfactant, and 1 to 150 parts by weight of a foaming agent.
4. The composition according to claim 1, wherein the composition comprises 100 parts by weight of polyol, 1 to 99 parts by weight of a silane precursor or polysilsesquioxane, 101 to 150 parts by weight of isocyanate, 0.1 to 50 parts by weight of a catalyst, 0.1 to 50 parts by weight of a surfactant, and 1 to 150 parts by weight of a foaming agent.
5. The composition according to claim 4, wherein the silane precursor and polysilsesquioxane have a composition ratio of 1:9 to 9:1.
6. The composition according to claim 1, wherein the silane precursor is represented by the formula 1,
RmSi(OR)4-m \u2003\u2003Formula 1
wherein, R is an alkyl group having 1 to 5 carbon atoms or a phenyl group, and m is an integer of 0 to 3.
7. The composition according to claim 6, wherein the silane precursor is at least one selected from the group consisting of methyl trimethoxy silane, methyl triethoxy silane, methyl tripropoxy silane, dimethyl dimethoxy silane, dimethyl diethoxy silane, diethoxy(3-glycidyloxypropyl)methyl silane, diethoxymethylphenyl silane, diethoxymethylvinyl silane, diphenyldiethoxy silane, dimethyldichloro silane, dimethylethoxyvinyl silane, ethyltrimethoxy silane, ethyltriethoxy silane, methyltrichloro silane, ethyltrichloro silane, and tetraethyl orthosilicate.
8. The composition according to claim 1, wherein the polysilsesquioxane is represented as formula 2,
R\u2014SiO1.5n\u2003\u2003Formula 2
wherein, R is at least one selected from the group consisting of alkyl having 1 to 3 carbon atoms, alkenyl having 1 to 3 carbon atoms, cycloalkyl having 3 to 10 carbon atoms, aryl having 6 to 15 carbon atoms, alkaryl having 1 to 3 carbon atoms, hydrogen, or hydroxyl, and n is an integer of 3 to 1000.
9. The composition according to claim 8, wherein the polysilsesquioxane has a weight-average molecular weight of 500 to 100,000.
10. The composition according to claim 8, wherein the polysilsesquioxane contains 5 to 40% of a silanol group.
11. A method for preparing a polyurethane foam comprising:
adding a catalyst, a surfactant, and a foaming agent to a polyol to prepare a premixed polyol;
mixing at least one among a silane precursor and polysilsesquioxane to the premixed polyol; and
mixing isocyanate to the mixture to carry out foaming.
12. The method according to claim 11, wherein the polyurethane foam comprises 100 parts by weight of polyol, 1 to 99 parts by weight of a silane precursor or polysilsesquioxane, 101 to 150 parts by weight of isocyanate, 0.1 to 50 parts by weight of a catalyst, 0.1 to 50 parts by weight of a surfactant, and 1 to 150 parts by weight of a foaming agent.
13. The method according to claim 11, wherein the polyurethane foam comprises 100 parts by weight of polyol, 1 to 99 parts by weight of a silane precursor or polysilsesquioxane, 101 to 150 parts by weight of isocyanate, 0.1 to 50 parts by weight of a catalyst, 0.1 to 50 parts by weight of a surfactant, and 1 to 150 parts by weight of a foaming agent.
14. The method according to claim 13, wherein the silane precursor and polysilsesquioxane have a composition ratio of 1:9 to 9:1.
15. The method according to claim 11, wherein the silane precursor is represented by the formula 1,
RmSi(OR)4-m \u2003\u2003Formula 1
wherein, R is an alkyl group having 1 to 5 carbon atoms or a phenyl group, and m is an integer of 0 to 3.
16. The method according to claim 15, wherein the silane precursor is at least one selected from the group consisting of methyl trimethoxy silane, methyl triethoxy silane, methyl tripropoxy silane, dimethyl dimethoxy silane, dimethyl diethoxy silane, diethoxy(3-glycidyloxypropyl)methyl silane, diethoxymethylphenyl silane, diethoxymethylvinyl silane, diphenyldiethoxy silane, dimethyldichloro silane, dimethylethoxyvinyl silane, ethyltrimethoxy silane, ethyltriethoxy silane, methyltrichloro silane, ethyltrichloro silane, and tetraethyl orthosilicate.
17. The method according to claim 11, wherein the polysilsesquioxane is represented as formula 2,
R\u2014SiO1.5n\u2003\u2003Formula 2
wherein, R is at least one selected from the group consisting of alkyl having 1 to 3 carbon atoms, alkenyl having 1 to 3 carbon atoms, cycloalkyl having 3 to 10 carbon atoms, aryl having 6 to 15 carbon atoms, alkaryl having 1 to 3 carbon atoms, hydrogen, or hydroxyl, and n is an integer of 3 to 1000.
18. The method according to claim 17, wherein the polysilsesquioxane has a weight-average molecular weight of 500 to 100,000.
19. The method according to claim 17, wherein the polysilsesquioxane contains 5 to 40% of a silanol group.
20. The method according to claim 11, wherein the polysilsesquioxane is added to the polyol by dissolving in at least a solvent selected from the group consisting of ethyl alcohol, isopropyl alcohol, benzene, toluene, xylene, methyl isobutyl ketone, acetone, tetrahydrofuran (THF), isopropyl ether, and silicon.
21. The method according to claim 11, wherein at least one among silane precursor and polysilsesquioxane is mixed to the premixed polyol with a mixing rate of 1000 to 10000 rpm.
22. The method according to claim 11, wherein at least one among silane precursor and polysilsesquioxane is mixed to the premixed polyol with a mixing time of 1 to 40 seconds.
23. A polyurethane foam prepared using the composition for a polyurethane foam according to claim 1.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for printing a fibrous web substrate comprising the steps of:
feeding the fibrous web substrate onto a rotating central impression cylinder having an outer surface;
arranging a plurality of printing stations adjacent to the outer surface of the central impression cylinder, wherein each printing station comprises an endless belt with one or more printing plates disposed on or integral to the endless belt; and
advancing the endless belt to move each printing plate into contact with the substrate whereby a plurality of graphics is printed on the substrate, wherein the graphics comprise a LREPEAT SUBSTRATE of at least about 58 inches.
2. The method of claim 15 comprising from about 4 printing stations to about 8 printing stations.
3. The method of claim 16 wherein each printing station further comprises a printing roller, an ink supply, and an anilox roller operably connected with the ink supply and the endless belt, wherein the anilox roller is adapted to deposit ink from the ink supply onto the printing plate(s).
4. The method of claim 15 wherein LREPEAT SUBSTRATE is at least about 60 inches.
5. The method of claim 18 wherein LREPEAT SUBSTRATE is from about 60 inches to about 1,500 inches.
6. The method of claim 15 wherein the substrate further comprises a plurality of discrete sheets separated by lines of termination, each sheet comprising a length, LDISCRETE SHEET.
7. The method of claim 20 wherein the printing plates comprise a first lane that corresponds to a LFIRST REPEAT SUBSTRATE and a second lane that corresponds to a LSECOND REPEAT SUBSTRATE, and wherein the LFIRST REPEAT SUBSTRATE and the LSECOND REPEAT SUBSTRATE are substantially registered with the lines of termination of the discrete sheet.
8. The method of claim 20 wherein the graphics are substantially registered to the lines of termination.
9. The method of claim 15 wherein LREPEAT SUBSTRATE comprises LFIRST REPEAT SUBSTRATE and LSECOND REPEAT SUBSTRATE wherein LFIRST REPEAT SUBSTRATE corresponds to a first series of graphics and LSECOND REPEAT SUBSTRATE corresponds to a second series of graphics, wherein LFIRST REPEAT SUBSTRATE and LSECOND REPEAT SUBSTRATE are the same or are different.