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US 10,590,290 B2Granted
Multi-stage polymer as grinding additive and method of producing the same
AssigneesDow Global Technologies LLC, Rohm and Haas Company
InventorsHu Li, Weijun Yang, Tao Wang, Xinhui Huang, Siyuan Jiang, Cheng Hui Chen
Life of this patent
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Abstract
This invention generally relates to a multi-stage polymer suitable for a grinding additive, a method for producing the multi-stage polymer, a composition and a paint composition comprising the multi-stage polymer and a use of the multi-stage polymer for a grinding additive of a paint composition.
Claims10
A multi-stage polymer comprising a first stage polymer and a second stage polymer, wherein the first stage polymer comprises, as polymerization units, based on the total weight of the first stage polymer:
- (a) from 30 wt % to 70 wt % of an α,β-ethylenically unsaturated carboxylic acid monomer;
- (b) from 0.1 wt % to 50 wt % of a macromonomer characterized by the following formula:
- H2C═C(R1)—CO2—(CH2CH2—O)n—(CHR2CH2—O)m—R3
- wherein R1 is hydrogen atom or methyl group;
- R2 is C1-C2 alkyl;
- R3 is C8-C30 alkyl, C8-C16 alkylphenyl or C13-C36 aralkylphenyl;
- n and m are independently an integer from 6 to 100 and 0 to 50, respectively, provided that n≥m and the sum of m and n is from 6 to 100, and
- (c) from 30 wt % to 70 wt % of an α,β-ethylenically unsaturated monomer other than the α,β-ethylenically unsaturated carboxylic acid monomer (a) and the macromonomer (b);
- and
- the second stage polymer comprises, as polymerization units, based on the total weight of the second stage polymer;
- (d) from 25 to 80 wt % of an α,β-ethylenically unsaturated carboxylic acid monomer;
- (e) from 0.1 to 50 wt % of a phosphorus containing monomer comprising phosphorus acid group or phosphate group, and
- (f) from 20 wt % to 75 wt % of an α,β-ethylenically unsaturated monomer other than the α,β-ethylenically unsaturated carboxylic acid monomer (d) and the phosphorus containing monomer (e), and both first stage polymer and second stage polymer are base-soluble polymers.
10 more elements
A method for preparing a multi-stage polymer comprising the steps of:
- i) polymerizing a first stage polymer from a first monomer composition comprising:
- (a) from 30 wt % to 70 wt % of an α,β-ethylenically unsaturated carboxylic acid monomer;
- (b) from 0.1 wt % to 50 wt % of a macromonomer characterized by the following formula:
- H2C═C(R1)—CO2—(CH2CH2—O)n—(CHR2CH2—O)m—R3
- wherein R1 is hydrogen atom or methyl group;
- R2 is C1-C2 alkyl;
- R3 is C8-C30 alkyl, C8-C16 alkylphenyl or C13-C36 aralkylphenyl;
- n and m are independently an integer from 6 to 100 and 0 to 50, respectively, provided that n≥m and the sum of m and n is from 6 to 100, and
- (c) from 30 wt % to 70 wt % of an α,β-ethylenically unsaturated monomer other than the α,β-ethylenically unsaturated carboxylic acid monomer (a) and the macromonomer (b), to obtain a first stage polymer;
- ii) contacting the first stage polymer with a second monomer composition comprising, based on the weight of the second monomer composition:
- (d) from 25 to 80 wt % of an α,β-ethylenically unsaturated carboxylic acid monomer;
- (e) from 0.1 to 50 wt % of a phosphorus containing monomer comprising phosphorus acid group or phosphate group, and
- (f) from 20 wt % to 75 wt % of an α,β-ethylenically unsaturated monomer other than the α,β-ethylenically unsaturated carboxylic acid monomer (d) and the phosphorus containing monomer (e), and
- iii) polymerizing the second monomer composition to obtain a second stage polymer under the presence of the first stage polymer.
11 more elements
A polymer composition formed from a method comprising at least two polymerization steps, wherein the method comprises the steps of:
- i) polymerizing a first stage polymer from a first monomer composition under emulsion polymerization conditions, in which the first stage monomer composition comprises
- (a) from 30 wt % to 70 wt % of an α,β-ethylenically unsaturated carboxylic acid monomer;
- (b) from 0.1 wt % to 50 wt % of a macromonomer characterized by the following formula:
- H2C═C(R1)—CO2—(CH2CH2—O)n—(CHR2CH2—O)m—R3
- wherein R1 is hydrogen atom or methyl group;
- R2 is C1-C2 alkyl;
- R3 is C8-C30 alkyl, C8-C16 alkylphenyl or C13-C36 aralkylphenyl;
- n and m are independently an integer from 6 to 100 and 0 to 50, respectively, provided that n≥m and the sum of m and n is from 6 to 100, and
- (c) from 30 wt % to 70 wt % of an α,β-ethylenically unsaturated monomer other than the α,β-ethylenically unsaturated carboxylic acid monomer (a) and the macromonomer (b);
- to obtain a first stage polymer;
- ii) contacting the first stage polymer with a second monomer composition comprising, based on the weight of the second monomer composition:
- (d) from 25 to 80 wt % of an α,β-ethylenically unsaturated carboxylic acid monomer;
- (e) from 0.1 to 50 wt % of a phosphorus containing monomer comprising phosphorus acid group or phosphate group, and
- (f) from 20 wt % to 75 wt % of an α,β-ethylenically unsaturated monomer other than the α,β-ethylenically unsaturated carboxylic acid monomer (d) and the phosphorus containing monomer (e),
- wherein the ratio of the first stage polymer to the second monomer composition is from 90:10 to 50:50, and
- iii) polymerizing the second monomer composition under emulsion polymerization conditions, to obtain a second stage polymer in the presence of the first stage polymer.
13 more elements
Dependencies are inferred from the claim text.