Alkyl phenolic resin and method of preparation thereof
View Patent ↗Described herein are alkyl phenolic resins and methods of producing them. The content of residual phenol in the alkyl phenolic resin may be less than about 2% w/w, the softening point of the alkyl phenolic resin may be about 85° C. to about 105° C., the tackiness of the alkyl phenolic resin may be about 8 N to about 25 N, the alkyl group of the alkyl phenol may have 6-12 carbon atoms, and the content of 4-(1,1,3,3-tetramethylbutyl) phenol in the alkyl phenol may be from about 0% to about 85% w/w. The invention also relates to a use of the alkyl phenolic resin as rubber tackifier.
1. A method, comprising:
providing an alkyl phenol mixture comprising an alkyl phenol and a second phenol, and
reacting the alkyl phenol mixture with an aldehyde to form an alkyl phenolic resin in the absence of a fatty acid,
wherein the second phenol is different from the alkyl phenol; and
the second phenol is present in a concentration from about 3.2% to about 10% by weight of the alkyl phenol mixture.
2. The method of claim 1 , wherein the second phenol is phenol.
3. The method of claim 1 , wherein the second phenol is selected from the group consisting of phenol, m-dihydroxy-benzene, and xylenol.
4. The method of claim 1 , wherein the aldehyde is selected from RCHO, wherein R is C1-C8 alkyl.
5. The method of claim 1 , wherein the alkyl group of the alkyl phenol has 6-12 carbon atoms.
6. The method of claim 1 , wherein the content of 4-(1,1,3,3-tetramethylbutyl)phenol in the alkyl phenol is from about 0% to about 85% w/w.
7. The method of claim 1 , wherein the alkyl phenol mixture comprises a para-alkylphenol.
8. The method of claim 1 , wherein the alkyl phenol mixture comprises para-tert-octyl phenol.
9. A method, comprising:
providing an alkyl phenol mixture comprising an alkyl phenol and a second phenol, and
reacting the alkyl phenol mixture with an aldehyde to form an alkyl phenolic resin,
wherein the second phenol is different from the alkyl phenol; and
the second phenol is present in a concentration from about 3.2% up to about 10% by weight of the alkyl phenol mixture,
and the alkyl phenolic resin consists essentially of a polycondensation product of the alkyl phenol mixture and the aldehyde.
10. A method, consisting essentially of:
providing an alkyl phenol mixture consisting essentially of an alkyl phenol and a second phenol, and
reacting the alkyl phenol mixture with an aldehyde to form an alkyl phenolic resin,
wherein the second phenol is different from the alkyl phenol; and
the second phenol is present in a concentration from about 3.2% up to about 10% by weight of the alkyl phenol mixture.