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Process for making an aqueous dispersion

A water-based dispersion, low water solubility technology, applied in the direction of sports accessories, adhesive types, coatings, etc., can solve the problem of uniform dispersion of difficult polymer materials

Active Publication Date: 2006-09-06
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is usually difficult to uniformly disperse such small molecular weight polymeric materials in latex

Method used

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  • Process for making an aqueous dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1: Including methyl-beta-cyclodextrin

[0082]Deionized water (400 grams), sodium carbonate (5 grams) and anionic surfactant (18.8 grams) were added to the reaction vessel at room temperature. The contents of the reaction vessel were then heated to 85°C with stirring under a nitrogen purge. Ammonium persulfate solution (5 grams of ammonium persulfate dissolved in 25 grams of deionized water) was then added to the reaction vessel with constant stirring. Two minutes after the addition of the ammonium persulfate, the latex polymer seed composition (137.6 grams) was added to the reaction vessel over 5 minutes with continuous stirring. Two monomer emulsions 1 and 2 (ME1 and ME2, respectively) were prepared according to Table 1 in separate containers.

[0083]

[0084] After the addition of the latex polymer seed composition, ME1 was added to the reaction vessel over 60 minutes with continuous stirring, the reaction temperature being maint...

Embodiment 2

[0085] Example 2: Methyl-β-cyclodextrin free

[0086] Example 1 was repeated without the addition of methyl-β-cyclodextrin.

Embodiment 3

[0087] Embodiment 3: product characteristic description

[0088] The weight % of solids, particle size and molecular weight of the two products of Example 1 and Example 2 were determined (the products of both examples were bimodal distribution), and the two products of Example 1 and Example 2 were characterized (). The weight percent solids are determined using conventional gravimetric techniques. Particle size analysis was performed with a Matec CHDF 2000 particle size analyzer. Molecular weights were determined by SEC using Polymer Laboratories polystyrene standards with peak average molecular weights ranging from 580 to 7,500,000. Conversions were performed using the Mark-Mwenck constant. The results of these analyzes are listed in Table 2.

[0089] product

[0090] As shown in Table 2, the SEC results show that the product of Example 1 has a different distribution than the product of Example 2. SEC measurements on the product of Example 2 s...

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Abstract

A process for making an aqueous dispersion is provided. More specifically, a process for making an aqueous dispersion having at least two polymeric components is provided.

Description

technical field [0001] The present invention relates to a process for the preparation of aqueous dispersions, more particularly aqueous dispersions comprising at least two polymeric components. Background technique [0002] Aqueous polymer dispersions, also known in the art as latexes, are generally known for use as components of, for example, adhesive formulations, adhesive formulations and coating formulations. It is often desirable to include components, usually low molecular weight polymeric materials, in these formulations to modify one or more properties of these formulations such as Tg, miscibility, adhesion, tack, coagulation, tensile strength, tensile strength, Elongation, modulus and polymer flow. However, it is often difficult to uniformly disperse such low molecular weight polymeric materials in latexes. Additionally, in addition to the difficulty of uniformly dispersing such low molecular weight polymeric materials in the latex, it is often necessary to incorp...

Claims

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Application Information

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IPC IPC(8): C08F2/16C08F2/44C08F20/10
CPCC09J133/04C09D151/003C08F283/00C08L51/003C09D153/00C08F291/00C08F2/38C08F2/18C08F265/04C08L33/04C08F2/16C08F265/06C08L53/00C08L2205/02C08L2666/04C08L2666/02A63B71/146A63B69/36A41D19/01547
Inventor W·劳
Owner ROHM & HAAS CO