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Aqueous dispersion of poly(acetal-polyether) and its use in protective coatings

A water-based coating, protective technology, applied in the field of water dispersion, can solve environmental damage and other problems

Active Publication Date: 2007-12-26
HERCULES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method should be avoided because organic solvents are volatile and most of them cause environmental damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-22

[0056] Standard Procedure A was used to prepare test specimens for these examples and is reported in Figures 1-2 and Tables 1-2.

[0057] Figures 1 and 2 below showing the viscosities of various mixtures are part of the present invention. In these examples, 20% NLS-200 (C 16 PAPE) or 20% 2:1 w / w based on NHS-300 (C 12 -PAPE) / X-33487-45 mixture (see below).

[0058] In Figure 1, 20% NLS-200 active mixture in water resulted in the formation of a gel / paste. The use of selected surfactants as additives at levels of only (5-8) wt% reduces the viscosity of 20% NLS-200 dispersions to levels of 1,000-6,000 cps.

[0059] In Figure 2, 20% 2:1 w / w based on NHS-300 (C 12 -PAPE) / X-33487-45 mixture formed a gel / paste in water. The use of selected surfactants as additives at levels of only 5-8% by weight reduced the viscosity of the 20% mixture dispersion to levels of 2,000-4,000 cps.

[0060] Figure 3 below shows the NLS-200 (Solid-C 16 -PAPE) in water-butyl carbitol mixtures, and HM...

Embodiment 23

[0088] Compared to the commercial Aquaflow NLS 200

[0089] Ease of incorporation of HMPAPE "NLS 200" mixtures in HG 5 high gloss paints

[0090]

thickener

composition

(weight%)

TE

(weight%)

start to dissolve

when needed

time (minutes)

completely dissolved

when needed

time (minutes)

added content

easy grade

commercial

NLS 200

HMPAPE / Water / BC

(25 / 60 / 1 5)

0.10

5

10

medium

TK 36

HMPAPE / Water / BTG

(25 / 5 5 / 20)

0.12

11

20

difficulty

TK 34

HMPAPE / water

/ Surfynol 465

(19.5 / 72.2 / 8.3)

0.13

1

2

easy

TK 52

HMPAPE / Water / BTG

(21 / 63 / 16)

0.12

2

10

medium

TK 54

this invention

HMPAPE / Water / BTG

(17.5 / 66.5 / 16...

Embodiment 24

[0095] Compared to the commercial Aquaflow NLS 200

[0096] Ease of Incorporation of HMPAPE "NLS 200" Mixtures in HG 5 High Gloss Paints

[0097]

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PUM

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Abstract

An aqueous dispersion includes an associative thickener based on a hydrophobically modified poly(acetal- or ketal-polyether) (HM-PAPE) and at least one viscosity reducing agent selected from ethoxylated alcohols, ethoxylated acetyleneic diols, phosphate esters, dialkyl sulfosuccinates, and mixtures thereof. This aqueous dispersion improves the incorporation of the HM-PAPEs into aqueous based protective coatings. This dispersion also improves water-borne coating compositions that optionally contain latex.

Description

[0001] This application claims the benefit of US Provisional Application No. 60 / 634,500, filed December 9, 2004, and US Provisional Application No. 60 / 636,268, filed December 15, 2004. technical field [0002] The present invention relates to aqueous dispersions of associative thickeners and at least one surfactant. More specifically, the present invention relates to aqueous dispersions of associative thickeners based on poly(acetal or ketal-polyether) (PAPE) and at least one surfactant selected from the group consisting of Ethoxylates, ethoxylated acetylenic diols, phosphate esters and dialkyl sulfosuccinates. The invention also relates to the use of these aqueous dispersions in aqueous coating compositions. Background technique [0003] Associative thickeners are generally water-soluble or water-dispersible polymers with a small amount of hydrophobic groups. They are widely used in rheology control and characterization applications of various aqueous systems. A major fi...

Claims

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Application Information

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IPC IPC(8): C08L59/00C08L71/00
Inventor K・N・巴基夫J・B・宾德T・克鲁特韦杰特D・克鲁伊托夫B・马格登伯格－罗尔斯阮清溪J・K・波利蒂斯W・G・萨洛蒙斯
Owner HERCULES INC
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