Additives with cloud points to improve efficiency of release agents
View Patent ↗This disclosure relates to papermaking and the use of creping adhesive and release agent compositions used in papermaking. In one aspect, there is provided a new class of release agents and compositions comprising release agents, the release agent comprising: a) a release agent comprising a quaternary imidazoline compound, an imidazoline free base, an oil-based dispersion, or a combination thereof; and b) a polyether component selected from a polypropylene glycol (PPG), a co-polymer of propylene glycol and ethylene glycol (co-PPG-PEG), a blend of polypropylene glycol (PPG) and polyethylene glycol (PEG), and a combination thereof, wherein the release composition has a cloud point in water at standard pressure from about 1° C. to about 98° C. There are also provided creping compositions having a cloud point, comprising an adhesive composition and a release composition as described.
1. A release composition for use in a creping process, comprising:
a release agent comprising a compound having formula:
wherein R 1 is a C 6 to C 22 hydrocarbyl moiety, R 2 is methyl or ethyl, and X − is [R 2 SO 4 ] − ; and
a polyether component comprising a polypropylene glycol (PPG), a co-polymer of propylene glycol and ethylene glycol (co-PPG-PEG), a blend of polypropylene glycol (PPG) and polyethylene glycol (PEG), an alcohol polyether, an alkyl phenol polyether, or any combination thereof.
2. The release composition according to claim 1 , further comprising: a sulfonated oil.
3. The release composition according to claim 1 , wherein the release agent further comprises the compound having formula:
wherein R 1 is a C 6 to C 22 hydrocarbyl moiety, R 2 is methyl or ethyl, and X − is [R 2 SO 4 ] − .
4. The release composition according to claim 1 , wherein the release agent further comprises an imidazoline free base.
5. The release composition according to claim 1 , wherein the release agent further comprises an oil-based dispersion, the oil-based dispersion comprising a paraffinic oil, a naphthenic oil, or a combination thereof.
6. The release composition according to claim 1 , wherein the release agent further comprises a sulfonated oil and an oil-based dispersion, wherein the oil-based dispersion comprises a paraffinic oil, a naphthenic oil, or a combination thereof.
7. A creping composition, comprising:
a release agent comprising a compound having formula:
wherein R 1 is a C 6 to C 22 hydrocarbyl moiety, R 2 is methyl or ethyl, and X − is [R 2 SO 4 ] − ; and
a polyether component.
8. The creping composition according to claim 7 , wherein the creping composition further comprises an adhesive composition.
9. The creping composition according to claim 8 , wherein the adhesive composition comprises a polyamidoamine-epihalohydrin polymer composition.
10. The creping composition according to claim 7 , wherein the creping composition further comprises a sulfonated oil, an imidazoline free base, and an oil-based dispersion, wherein the oil-based dispersion comprises a paraffinic oil, a naphthenic oil, or a combination thereof.
11. The creping composition according to claim 7 , wherein:
the release agent further comprises a paraffinic oil.
12. The creping composition according to claim 7 , wherein the release agent further comprises a compound having formula:
wherein each R 1 is a C 6 to C 22 hydrocarbyl moiety.
13. The creping composition according to claim 7 , wherein the release agent further comprises a compound having formula:
wherein R 1 is a C 6 to C 22 hydrocarbyl moiety.
14. The creping composition according to claim 7 , wherein the release agent further comprises the compound having formula:
wherein R 1 is a C 6 to C 22 hydrocarbyl moiety, R 2 is methyl or ethyl, and X − is [R 2 SO 4 ] − .
15. The creping composition according to claim 7 , wherein the release agent further comprises a naphthenic oil.
16. The creping composition according to claim 7 , wherein the polyether component comprises:
a) polypropylene glycol (PPG) having a weight average molecular weight (Mw) from about 400 to about 3,500 Daltons;
b) a block copolymer of propylene glycol and ethylene glycol (co-PPG-PEG) having a weight average molecular weight (Mw) from about 300 to about 4,000 Daltons, wherein the ratio of PPG monomer residues to PEG monomer residues is from 20:1 to 1:5; or
c) combinations thereof.
17. A method for creping a cellulosic fiber web, comprising:
applying a creping composition having a first temperature to a drying surface having a second temperature higher than the first temperature, wherein the creping composition has a cloud point, wherein the creping composition comprises a release composition, and wherein the release composition comprises:
a release agent comprising a compound having formula:
wherein R 1 is a C 6 to C 22 hydrocarbyl moiety, R 2 is methyl or ethyl, and X − is [R 2 SO 4 ] − ; and
a polyether component comprising a polypropylene glycol (PPG), a co-polymer of propylene glycol and ethylene glycol (co-PPG-PEG), a blend of polypropylene glycol (PPG) and polyethylene glycol (PEG), an alcohol polyether, an alkyl phenol polyether, or any combination thereof;
adhering a cellulosic fiber web to the drying surface; and
dislodging the adhered cellulosic fiber web from the drying surface.
18. The method according to claim 17 , wherein:
the release agent further comprises a sulfonated oil and an oil-based dispersion, wherein the oil-based dispersion comprises a paraffinic oil, a naphthenic oil, or a combination thereof.