Polymer composition comprising phenolic resin
View Patent ↗The invention relates to a polymer composition which is characterized in that it comprises a mixture (A) consisting of formula (A1) and/or formula (A2), phenolic resin (B) and a stabilizer (C) in the form of a HALS compound.
1. A polymer composition, comprising:
component (A) comprising at least one compound having structure (A2)
wherein A=unsubstituted alkylene having from 1 to 6 carbon atoms or unsubstituted phenylene,
R 4 , R 5 , R 6 , R 7 , R m , R o =hydrogen, and/or unsubstituted alkyl groups having from 1 to 6 carbon atoms,
m, o=0, 1, 2, 3,
at least one phenolic resin (B);
at least one stabilizer (C) selected from the group consisting of compounds having structure (2)
wherein R VII =hydrogen, alkyl, or alkoxy group,
structure (3)
wherein R VI =
q=2 to 10,
structure (4)
wherein R VIII =hydrogen or alkyl group,
and
a polymer-bound HALS having structure (5)
wherein R ix =hydrogen or alkyl group, and
r, s≧10, and
an antioxidant having structure (7)
wherein p=1 to 5,
wherein in at least one compound having the structure (A2), m and o=0 (A2g5).
2. The polymer composition according to claim 1 , wherein component (A) consists of 100% by weight of compounds having the structure (A2).
3. The polymer composition according to claim 2 , wherein the component (A) comprises
from 30 to 70% by weight of compounds of structure (A2g6) and
from 70 to 30% by weight of compounds of structure (A2g5).
4. The polymer composition according to claim 1 , wherein the stabilizer (C) is comprised in an amount of from 0.1 to 2% by weight based on a total weight of the polymer composition.
5. The polymer composition according to claim 1 , further comprising at least one deaerator.
6. The polymer composition according to claim 5 , wherein the at least one deaerator is selected from the group consisting of a silicone oil, a silicone-modified polyglycol, a silicone-modified polyether, a foam-destroying polysiloxane, a foam-destroying polymer, and a polyether-modified polymethylalkylsiloxane.
7. The polymer composition according to claim 1 , further comprising at least one mold release agent.
8. The polymer composition according to claim 2 , wherein the component (A) comprises
from 45 to 55% by weight of compounds of structure (A2g6) and
from 55 to 45% by weight of compounds of structure (A2g5).
9. The polymer composition according to claim 1 , which comprises component (A) and phenolic resin (B) in a weight ratio of 99:1 to 1:99.
10. The polymer composition according to claim 9 , wherein the weight ratio is 90:10 to 10:90.
11. The polymer composition according to claim 9 , wherein the weight ratio is 75:25 to 25:75.
12. The polymer composition according to claim 9 , wherein the weight ratio is 45:55 to 55:45.
13. The polymer composition according to claim 1 , wherein phenolic resin (B) is novolak resin having a free formaldehyde content of less than 0.1% by weight.
14. The polymer composition according to claim 1 , wherein component (A) is a mixture comprising the compound A2g5 and at least one other compound having the structure (A2).
15. The polymer composition according to claim 14 , wherein in said at least one other compound having the structure (A2), m and o=1 (A2g6).
16. The polymer composition according to claim 1 , wherein the stabilizer (C) comprises a compound having structure (3).
17. The polymer composition according to claim 15 , wherein