Surface treatment of particles and their use
The invention relates to polymer compositions containing inorganic or organic particles which either have been surface-treated before the production of the compositions or are dispersed by special polyether-modified siloxanes through the production of the compositions.
1. A polymer composition, comprising:
a) a solid particle,
b) at least one polymer selected from the group consisting of a thermoplast and a duromer,
c) 0.05 to 10 wt. % based on the total weight of the composition of a compound of formula (I),
where
R identically or differently is R 1 methyl, or hydroxy,
R 1 identically or differently is a polyether residue of formula (III)
—Z—(O—C m H 2m-(n-1) ) o —[O-((AO) r —R 3] ] n (III)
where
Z is a branched alkylene residue or an unbranched alkylene residue with 2 to 4 carbon atoms,
m is from 2 to 4,
n is from 1 to 3,
o is from 0 or 1,
AO is independently an oxyalkylene residue selected from the group consisting of an oxypropylene residue, an oxybutylene residue, and a combination of oxypropylene residue and oxybutylene residue, each of which optionally includes an oxyetheylene residue,
R 3 is hydrogen,
and with the proviso that in R 1 a sum of carbon and oxygen atoms is at least 70,
with the proviso that r has a value that, taken together with m and n, provides said group R 1 with a total number of carbon atoms and oxygens atoms of at least 70,
a is from 20 to 200,
b is from 1 to 50,
with the proviso that if none of residues R is equal to R 1 , b is at least 3, and
d) optionally further components.
2. The polymer composition according to claim 1 , wherein
R 1 identically or differently is a —(CH 2 ) p —O-EO x —PO y —BO z —R 3 ,
with the proviso that in R 1 the sum of carbon and oxygen atoms is at least 70, and
EO is oxyethylene,
PO is oxypropylene,
BO is oxybutylene,
x is from 0 to 20,
y is from 5 to 100,
z is from 0 to 20,
p is from 2 to 4,
and R 3 is as defined in claim 1 .
3. The polymer composition according to claim 1 , wherein a numerical ratio of a to b is from 8:1 to 18:1.
4. The polymer composition according to claim 2 , wherein x is between 0.05 and 1.2 times a sum of y and z.
5. The polymer composition according to claim 1 , wherein the solid particle is a colouring pigment particle.
6. The polymer composition according to claim 1 , wherein has been treated with the at least one compound of the formula (I) before mixing with component b), and the solid particle excludes a titanium dioxide particle, a barium sulphate particle, a zinc sulphide particle, and a lithopone particle.
7. The polymer composition according to claim 6 , which comprises 0.01 to 3 wt. % of the at least one compound of the formula (I) based on a particle mass as part of the polymer composition.
8. The polymer composition according to claim 1 , wherein the solid particle is an aluminum trihydrate (ATH) particle or a magnesium hydroxide (MDH) particle.
9. The polymer composition according to claim 1 , which exhibit a decrease in water absorption of 25% compared to a polymer composition which does not contain the compound of the formula (I).
10. The polymer composition according to claim 1 , which has an MFI which lies at least 10% above an MFI which was determined with the same composition which comprises the same solid particle in non-surface-treated form.
11. A method for retarding a flame, comprising contacting the polymer composition according to claim 1 with the flame, wherein the polymer composition comprises an aluminum trihydrate (ATH) particle or a magnesium hydroxide (MDH) particle.
12. The polymer composition according to claim 8 , which is better by at least one UL 94 fire class, compared to a polymer composition which does not contain the at least one compound of the formula (I).
13. A process for treating a surface of a primary particle, comprising contacting the primary particle with at least one compound of
formula (I)
where
R identically or differently is R 1 , methyl or hydroxy,
R 1 identically or differently is a polyether residue of the formula (III)
—Z—(O—C m H 2m-(n-1) ) o —[O-((AO) r —R 3] ] n (III)
where
Z is a branched alkylene residue or an unbranched alkylene residue with 2 to 4 carbon atoms,
m is from 2 to 4,
n is from 1 to 3,
o is from 0 or 1,
AO is independently an oxyalkylene residue selected from the group consisting of an oxypropylene residue, an oxybutylene residue, and a combination of oxypropylene residue and oxybutylene residue, each of which optionally includes an oxyethylene residue,
R 3 is hydrogen,
and with the proviso that in R 1 a sum of carbon and oxygen atoms is at least 70,
with the proviso that r has a value that, taken together with m and n, provides said group R 1 with a total number of carbon atoms and oxygens atoms of at least 70,
a is from 20 to 200,
b is from 1 to 50,
with the proviso that if none of the residues R is equal to R 1 , b is at least 3,
wherein 0.01 to 2 wt. % of the at least one compound of the formula (I) is contacted with the primary particle, based on a mass of the primary particle to be treated, and the primary particle excludes a titanium dioxide particle, a barium sulphate particle, a zinc sulphide particle, and a lithopone particle.
14. A polymer composition, comprising:
a) a solid particle,
b) at least one polymer, which is a thermoplast selected from the group consisting of polyethylene, polypropylene, polyamide, polystyrene, and blends thereof, or a duromer, which is a silicone resin or a urea resin,
c) at least one compound of formula (I),
where
R identically or differently is R 1 , methyl, or hydroxy,
R 1 identically or differently is a polyether residue of formula (III)
—Z—(O—C m H 2m-(n-1) ) o —[O-((AO) r —R 3] ] n (III)
where
Z is a branched alkylene residue or an unbranched alkylene residue with 2 to 4 carbon atoms,
m is from 2 to 4,
n is from 1 to 3,
o is from 0 or 1,
AO is independently an oxyalkylene residue selected from the group consisting of an oxypropylene residue, an oxybutylene residue, and a combination of oxypropylene and oxybutylene, each of which optionally includes an oxyetheylene residue,
R 3 is hydrogen,
and with the proviso that in R 1 a sum of carbon and oxygen atoms is at least 70,
with the proviso that r has a value that, taken together with m and n, provides said group R 1 with a total number of carbon atoms and oxygens atoms of at least 70,
a is from 20 to 200,
b is from 1 to 50,
with the proviso that if none of the residues R is equal to R 1 , b is at least 3, and
d) optionally further components.
15. The polymer composition according to claim 14 , wherein the thermoplast is polypropylene.