Tint-viscosity stabilization polymeric thickeners
View Patent ↗Compositions and methods of making urethane based nonionic associative thickeners are described herein. Uses of the nonionic associative thickeners are also described.
1. An associative thickener having a formula of:
where R is an aromatic hydrophobe; m is ≧2; n is ≧1; p ranges from about 45 to about 275; and each X is independently
where n is >1; or
where R 2 is aliphatic, cycloaliphatic, or aromatic; and at least one X is:
where R 1 is:
where R 3 is aliphatic, cycloaliphatic, or aromatic.
2. The associative thickener of claim 1 , wherein R comprises:
where R 4 is an aliphatic group, a cycloaliphatic group, an aromatic group, arylalkyl group; a heterocyclic group, a heteroatom linkage, or combinations thereof.
3. The associative thickener of claim 1 , wherein R comprises:
where R 5 is hydrogen, alkyl group, butyl, phenyl, benzyl, or combinations thereof.
4. The associative thickener of claim 1 , wherein R 2 comprises:
where R 6 is aliphatic, cycloaliphatic, aromatic, heterocyclic, or combinations thereof.
5. The associative thickener of claim 4 , wherein R 6 is methyl.
6. The associative thickener of claim 1 , wherein R is:
R 1 is:
where R 3 is (CH 2 ) r , where r is 0 or 1, and R 2 is:
7. An associative thickener made by a method, comprising:
forming a polyether polyol polymer/hydrophobe melt, wherein the hydrophobe comprises an aromatic group;
introducing an isocyanurate trimer and a di-isocyanate to the melt; and
heating the melt at a temperature sufficient to produce an associative thickener having the formula of:
where R is an aromatic hydrophobe; m is ≧2; n is ≧1; p ranges from about 45 to about 275; and
each X is independently
where n is >1; or
where R 2 is aliphatic, cycloaliphatic, or aromatic; and at least one X is
where R 1 is
where R 3 is aliphatic, cycloaliphatic, or aromatic.
8. A waterborne composition comprising: water, one or more pigment compositions, and an associative thickener having the formula of:
where R is a hydrophobe and comprises an aromatic group; m is ≧2; n is ≧1; p ranges from about 45 to about 275; and each X is independently
where n is >1; or
where R 2 is aliphatic, cycloaliphatic, or aromatic; and at least one X is:
where R 1 is:
where R 3 is aliphatic, cycloaliphatic, or aromatic.
9. The waterborne composition of claim 8 , wherein a concentration of associative thickener ranges from about 0.01 wt% to about 3 wt%, based on the total weight of waterborne composition.
10. The waterborne composition of claim 8 , wherein a total amount of pigment composition ranges from about 2 ounces to about 16 ounces per gallon of waterborne composition.
11. The waterborne composition of claim 8 , wherein the waterborne composition has a SAG resistance value of at least 12 mils, as determined by ASTM Method D4400.
12. The waterborne composition of claim 8 , wherein a final Stormer viscosity of the waterborne composition is between about 30% and about 120% of the Stormer viscosity of the waterborne composition prior to addition of one or more of the pigment compositions.
13. The waterborne composition of claim 8 , wherein a final Stormer viscosity of the waterborne composition is between about 30% and about 120% of the Stormer viscosity of the waterborne composition prior to addition of one or more of the pigment composition, wherein a total concentration of pigment is at least 2 ounces of pigment composition per gallon of waterborne composition.
14. The waterborne composition of claim 8 , wherein a final Stormer viscosity of the waterborne composition is between about 30% and about 120% of the Stormer viscosity of the waterborne composition prior to addition of one or more of the pigment compositions, wherein a total amount of pigment composition ranges from about 2 ounces to about 16 ounces per gallon of waterborne composition, and wherein at least one of the pigment compositions comprises pigment particles having an average particle size of 0.01 micrometers.
15. The waterborne composition of claim 8 , wherein at least one of the pigment compositions comprises pigment particles having an average particle size of at least 0.01 micrometers.
16. The waterborne composition of claim 8 , wherein at least one of the pigment compositions has a BET surface area of at least 10 m 2 /g microns as measured by nitrogen adsorption.
17. The waterborne composition of claim 8 , wherein at least one of the pigment compositions comprises iron oxide.
18. The waterborne composition of claim 8 , wherein at least one of the pigment compositions comprises carbon black.
19. The waterborne composition of claim 8 , wherein at least one of the pigment compositions comprises one or more phthalo compounds.
20. The waterborne composition of claim 8 , wherein the waterborne composition is paint.