Novolak resins and rubber compositions comprising the same
The present invention relates to novolak resins prepared with, inter alia, one or more alkylphenols. The invention further relates to compositions comprising the novolak resins, such as vulcanizable rubber compositions, and to products obtained therewith.
1. A novolak resin comprising phenolic monomers, wherein 1-40 wt % of the phenolic monomers are alkylphenols having a C 8 -C 60 alkyl group, wherein one or more of the alkyl groups in the alkylphenols is a C 20 -C 30 alkyl group.
2. The novolak resin of claim 1 , further comprising resorcinol.
3. The novolak resin of claim 1 , further comprising phenol.
4. The novolak resin of claim 1 , wherein one or more of the alkyl groups in the alkylphenols is a C 24 -C 28 alkyl group.
5. The novolak resin of claim 1 , further comprising one or more aldehydes.
6. The novolak resin of claim 5 , wherein one or more of the aldehydes is formaldehyde.
7. The novolak resin of claim 1 , wherein the resin comprises:
(a) 1-30 wt % alkylphenols;
(b) 1-20 wt % resorcinol;
(c) 45-98 wt % phenol; and
(d) one or more aldehydes;
wherein the weight percentages are based on the total weight of components (a), (b), and (c).
8. The novolak resin of claim 7 , wherein the resin comprises:
(a) 5-20 wt % alkylphenols;
(b) 5-20 wt % of resorcinol;
(c) 65-90 wt % of phenol; and
(d) one or more aldehydes;
wherein the weight percentages are based on the total weight of components (a), (b), and (c).
9. The novolak resin of claim 8 , wherein the resin comprises:
(a) 5-15 wt % alkylphenols;
(b) 5-15 wt % resorcinol;
(c) 70-90 wt % phenol; and
(d) formaldehyde;
wherein the weight percentages are based on the total weight of components (a), (b), and (c).
10. A composition comprising one or more rubber compounds and the novolak resin according to claim 1 .
11. The composition of claim 10 , wherein the weight ratio of said one or more rubber compounds to said novolak resin ranges from about 99:1 to about 9:1.
12. A product prepared at least in part by vulcanizing the composition of claim 10 .
13. The product of claim 12 , wherein said product is selected from the group consisting of tires, hoses, power belts, conveyor belts, printing rolls, rubber shoe heels, rubber shoe soles, rubber wringers, automobile floor mats, mud flaps for trucks, ball mill liners, and weather strips.
14. The product of claim 12 , wherein said product is a wire belt skim coat.
15. A tire comprising a novolak resin that contains phenolic monomers, wherein 1-40 wt % of the phenolic monomers in the resin are alkylphenols having a C 8 -C 60 alkyl group, wherein one or more of the alkyl groups in the alkylphenols is a C 20 -C 30 alkyl group.
16. The tire of claim 15 , wherein one or more of the alkyl groups in the alkylphenols is a C 24 -C 28 alkyl group.
17. The tire of claim 15 , wherein the resin comprises:
(a) 1-30 wt % alkylphenols;
(b) 1-25 wt % resorcinol;
(c) 45-98 wt % phenol; and
(d) one or more aldehydes;
wherein the weight percentages are based on the total weight of components (a), (b), and (c).
18. The tire of claim 17 , wherein the resin comprises:
(a) 5-20 wt % alkylphenols;
(b) 5-20 wt % of resorcinol;
(c) 65-90 wt % of phenol; and
(d) one or more aldehydes;
wherein the weight percentages are based on the total weight of components (a), (b), and (c).
19. The tire of claim 18 , wherein the resin comprises:
(a) 5-15 wt % alkylphenols;
(b) 5-15 wt % resorcinol;
(c) 70-90 wt % phenol; and
(d) formaldehyde;
wherein the weight percentages are based on the total weight of components (a), (b), and (c).