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Superabsorbent-hydrophobic polymer two-phase compositions

A hydrophobic polymer, high water absorption technology, applied in the direction of graft polymer adhesives, adhesive types, other chemical processes, etc., can solve problems such as damage to material properties, reduce waste, safe preparation, simplify The effect of the preparation method

Inactive Publication Date: 2005-11-09
WR GRACE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, heat sensitive materials cannot be processed in this way
In addition, heat treatment of polymeric materials will risk compromising the properties of the material

Method used

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  • Superabsorbent-hydrophobic polymer two-phase compositions
  • Superabsorbent-hydrophobic polymer two-phase compositions
  • Superabsorbent-hydrophobic polymer two-phase compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] It can be seen from the above table that the ingredients in component A are oil, superabsorbent resin, and crosslinking agent; component B contains hydrophobic polymer emulsion.

[0106] Component A was prepared using a Silverson high speed rotor-stator type mixer. All ingredients, except the superabsorbent, were filled into a container and stirred at 4000 rpm for 15 minutes. The superabsorbent material was added to the mixture of oil and crosslinker using a single shaft, paddle type (about 200 rpm), vacuum mixer. This mixing step was performed under vacuum for one minute. Immediately add Component B to Component A and mix the composition in a vacuum mixer. Viscosity increases significantly within one minute. At this point the composition is rubbery. The samples were pressed into 60 mil sheets. The composition was then crosslinked for one week at room temperature. Tensile strength and elongation were measured at a crosshead speed of 20" / min. The results are...

Embodiment 2

[0112] The tensile strength and elongation test results of the compositions prepared by mixing the two components are as follows.

[0113] Tensile Strength Elongation

[0114] (psi) (%)

[0115] 563.1 264.9

Embodiment 3

[0118] Component A is a superabsorbent polymer dispersed in water. The other component is an aqueous emulsion of butyl acrylate styrene copolymer, which is pressure sensitive.

[0119] Component A was prepared using a high speed Cowels dissolver. A few minutes of mixing is required to obtain a thick, pasty mass. Charge Part A and Part B into a vacuum mixer and mix for 2 minutes. Here the viscosity increases significantly and the mixture has a spreadable, pasty consistency. A 60 mil sheet was pressed between two PET release liners. After standing for a day, the material transformed into a rubbery consistency. Tensile strength was measured after one week. The result is shown below.

[0120] Tensile Strength Elongation

[0121] (psi) (%)

[0122] 5.3 155.2

[0123] These results demonstrate that the compositions of the present invention can be prepared without oil.

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Abstract

Disclosed is a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. Also disclosed is a two component system for preparing a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. The first component is an emulsion of the hydrophobic polymer; the second component comprises the superabsorbent polymer; and the first and second components form the composition when mixed.

Description

[0001] related application [0002] This application claims the benefit of US Provisional Application No. 60 / 316,992, filed September 4, 2001, the entire technical content of which is hereby incorporated by reference. Background of the invention [0003] Polymeric materials are generally converted into useful articles of predetermined, three-dimensional shape. Methods of making such articles generally involve first providing a low viscosity composition (forming it into a desired shape) and then increasing the viscosity of the composition to maintain the shape. This generally involves providing a liquid composition, converting it into a desired shape, and converting it into a solid. There are several variations of this method. For example, the liquid composition may be a solution of the polymeric material dissolved in an organic solvent, or a dispersion of the polymeric material; evaporation of the organic solvent or water converts the composition from a liquid to a solid. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10C08L7/00C08L21/00C08L33/02C08L33/08C08L35/06C08L101/00C08L101/14C09D133/00C09D151/00C09D201/00C09J133/00C09J151/00C09J201/00
CPCC08L33/02C08L35/06C08L7/00Y10S428/913C08L101/14C08L33/08C08L21/00Y10T428/1334Y10T428/163Y10T428/1352Y10T428/31917C08L2666/02C08L2666/04C08J3/075
Inventor R·A·维尔钦斯基X·孙
Owner WR GRACE & CO
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