Aqueous compositions with polyvalent metal cations and dispersed polymers

A water-based composition and composition technology, applied in the direction of polishing composition, chemical instrument and method, coating, etc., can solve problems such as instability

Inactive Publication Date: 2011-11-23
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is sometimes difficult to incorporate high levels of calcium cations into aqueous polymer dispersions because aqueous polymer dispersions containing calcium cations are even more prone to instability than those containing zinc cations

Method used

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  • Aqueous compositions with polyvalent metal cations and dispersed polymers
  • Aqueous compositions with polyvalent metal cations and dispersed polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Embodiment 1: the preparation of latex polymer

[0086] Using standard techniques of aqueous emulsion polymerization, the polymers were prepared from the following monomer mixtures. The result of each polymerization is a dispersion of polymer particles in water with a pH of less than 7.

[0087] Table 1

[0088] MM1

Embodiment 2

[0089] Embodiment 2: the preparation of premix:

[0090] The dispersion of polymer particles is mixed with a swelling agent and a cosurfactant. The cosurfactant and swelling agent are combined by shaking or stirring until an aqueous emulsion is formed. In the absence of a swelling agent, the co-surfactant was diluted with water to give a solids content of 22-24%. In the absence of cosurfactants, the swelling agent was added without further dilution. In all cases the aqueous polymer dispersion was at 50°C at the end of the polymerization. The aqueous polymer dispersion was cooled to 39°C, then the premix was gradually added at a steady state rate over 30 minutes and held for 20 minutes.

Embodiment 3

[0091] Embodiment 3: the preparation of follow-up mixture:

[0092] Add Ca or Mg cations. The resulting dispersion of polymer particles was neutralized with aqueous ammonia to a pH of 7.5-8.0 at 39°C over a period of 20 minutes. The polymer is held for an additional 20 minutes before calcium or magnesium is added. Add 2% dispersant to prepare 30% calcium hydroxide or magnesium oxide slurry. The slurry was then added to the polymer at 39°C over 30-60 minutes and the temperature was maintained for an additional 60 minutes.

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Abstract

There is provided a method of forming an aqueous composition, said method comprising (a) first, forming at least one aqueous polymer dispersion by a process comprising polymerizing a monomer mix comprising 5-50% by weight based on the weight of said monomer mix, of one or more carboxylic acid functional monomers; (b) second, adding to said aqueous polymer dispersion, ingredients comprising (i) 1 to 10 parts by weight of at least one swelling agent, based on 100 parts by weight of said monomer mix; and (ii) one or more nonionic surfactant, anionic surfactant, or mixture thereof; and (c) third, adding calcium cation or magnesium cation or a mixture thereof to said aqueous polymer dispersion.

Description

technical field [0001] The present invention relates to aqueous compositions having multivalent metal cations and dispersed polymers. Background technique [0002] Various useful compositions comprise at least one polymer and at least one multivalent metal cation dispersed in water. In some such compositions, the polymer has acid functionality. These compositions are useful for various purposes, for example as ingredients in leather treatments and floor polishes. In the past, many known examples of such compositions have lower levels of multivalent cations, although in some cases the usefulness of such compositions will be improved if the compositions have higher levels of multivalent metal cations. For example, it is believed that floor polishes will last longer if higher levels of multivalent metal cations are used. However, high levels of multivalent metal cations can sometimes cause instability in aqueous polymer dispersions, leading to the formation of gels or precip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/215C08L25/14C08K3/22C09D125/14C09D7/12C09G1/10
CPCC08K5/0008C08F2/18C08K3/0083C09G1/16C08K3/105C08J3/02C08J3/07C08K3/10C08L33/06
Inventor J·L·埃尔德雷奇T·泰萨克P·梅尔坎多
Owner ROHM & HAAS CO
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