Stable low foam waterborne polymer compositions containing poly (alkyleneimines)

A water-based polymer, alkylene imine technology, applied in the field of emulsion chemistry

Inactive Publication Date: 2001-01-03
EASTMAN CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite the health and safety benefits associated with transitioning from organic solventborne to waterborne compositio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Synthesis of Latex:

[0059] The structure of the reactor is a 4L jacketed kettle kept at 80°C with circulating water. The atmosphere above the reaction zone was inertized with nitrogen using deionized water. Add 1000g water, 3g sodium bicarbonate and 54.5g (1.5phm) Rhodacal A246L surfactant (a C 12，14 - Sodium alpha olefin sulfonate surfactant, available from Rhone-Poulenc as a 38.5% solution in water) and heated to 80°C. With 700g water, 10.9g (0.3phm) RhodacalA246L surfactant, 672g styrene, 476g butyl acrylate, 70g 2-hydroxyethyl methacrylate (HEMA), 140g acetoacetoxyethyl methacrylate ( AAEM) and 84 g of sodium 2-acrylamido-2-methylpropanesulfonate (AMPS 2405 monomer, purchased from Lubrizol, 50% aqueous solution) to prepare an emulsion. Add 110 g of the above-mentioned emulsion to the reactor, and then add a solution of 2.7 g of sodium persulfate in 20 g of water. After 5 minutes, the remaining emulsion was added to the reactor over 2 hours. At the same time, ...

Embodiment 2-

[0063] Embodiment 2-comparative example

[0064] Treating 100 g of a latex similar to that described in Example 1 with the same proportion of PEI, but without post-addition of Tergitol 15-S-40, the pH of the latex was adjusted to 9.8, causing the mixture to gel within 10 minutes.

Embodiment 3

[0065] Example 3: Latex polymer without acetoacetoxy / enamine functionality

[0066] latex synthesis

[0067] The structure of the reactor is a 4L jacketed kettle kept at 80°C with circulating water. The atmosphere above the reaction zone was inertized with nitrogen using deionized water. In the reactor, add 800g water, 60g Maphos 60A surfactant (a kind of aliphatic phosphate ester surfactant, the product of PPG company, 30% aqueous solution, be 8.6 with 50% sodium hydroxide neutralization to pH) and 3.5 g of acrylic acid. The contents of the reactor were adjusted to pH 8 with 50% sodium hydroxide solution. An emulsion was prepared with 700 g water, 23.3 g 30% Maphos 60A surfactant, 714 g styrene, 602 g butyl acrylate, 70 g 2-hydroxyethyl methacrylate and 14 g methacrylic acid. A solution of 2 g of sodium persulfate in 20 g of water was added to the reactor. After 5 minutes, the monomer emulsion was fed into the reactor over 2 hours. After 30 minutes, a solution of 1.5 g ...

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Abstract

This invention provides low foam waterborne polymer compositions stabilized against gelling due to the addition of a poly(alkyleneimine) by addition of surfactants. Preferably, the surfactants are nonionic surfactants having a hydrophilic-lipophilic balance (HLB) of at least about 17.5. Polymerization in the presence of phosphate surfactants has been found to yield low foam polymers. These stable low foam polymer compositions are useful in a variety of coating formulations such as, for example, paints, inks, sealants, textile backcoatings, adhesives and the like. Methods of making stable low foam polymer are also disclosed.

Description

field of invention [0001] This invention relates to the field of emulsion chemistry. More specifically, the present invention relates to stable low foaming waterborne polymer compositions for use in various coating formulations. Background of the invention [0002] In more and more industrial fields, water-based coating compositions are continuously replacing traditional organic solvent-based coating compositions. For example, paints, inks, sealants and adhesives that were previously formulated with organic solvents are now formulated as water-based compositions. This reduces the potential for injury from exposure to volatile organic compounds (VOC's) typically contained in solvent-borne compositions. Although there are health and safety benefits associated with converting an organic solventborne composition to a waterborne composition, the waterborne coating composition must meet or exceed the performance standards expected of a solventborne composition. The need to meet...

Claims

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Application Information

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IPC IPC(8): C08L101/02C08LC09DC09D5/02C09D201/00
CPCC09D201/00C09D5/024C08L2666/14C09D5/02
Inventor P·W·雷诺兹D·A·斯科特
Owner EASTMAN CHEM CO
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