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Process for preparing high water absorptive polymer

A highly absorbent, polymer technology, used in communication cables, textiles and papermaking, insulated cables, etc., to solve problems such as optical cable impact and internal damage

Inactive Publication Date: 2004-12-15
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Icing inside the cable not only affects the dimensional stability of the system but may also cause internal damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] This example illustrates a method for producing superabsorbent polymers with particle sizes below 100 μm from monomers.

[0085] A Megatron  A device is installed on the MT 5000 reactor to introduce solids as liquids. The reactor has a high-strength Micronizer cell with a rotation speed of 16,000 RPM, a system for blowing inert gas, a series of temperature probes, and a A heating and cooling unit consisting of a jacket in which a heat exchange fluid is circulated at a specific precise temperature. This reactor is used to polymerize monomers to produce superabsorbent polymers with a particle size below 100 microns.

[0086] The rotating speed of the particle machine is set at 16000 RPM, and a certain amount of hydroquinone-stabilized aqueous solution containing 80% (weight) acrylic acid is quantitatively neutralized with 20% (weight) sodium hydroxide or potassium hydroxide solution. During this process, the temperature inside the particle machine should not exceed 35°...

Embodiment 2

[0095] A kind of yarn (Kevlar  49 type, 1580dtex), containing poly-p-phenylene diaminerephthalamide (poly-p-phenylene diamineterephthalamide), this yarn is prepared according to Example 1 in the oil agent disclosed by US Patent No. 5,270,113 containing 35 % (weight) dispersion treatment of superabsorbent macromolecules, this oil agent includes ester lubricating oil that contains 30-70% (weight) of an alcohol and a kind of carboxylic acid, 20-50% (weight) is made of ethoxy An emulsification system composed of unsaturated fatty acid or fatty alcohol or ethoxylated alkylamine, 5-15% (weight) of antistatic agent, and 0.2-2% (weight) of corrosion inhibitor. The main component of the oil agent is an ester lubricating oil synthesized from an alcohol and a carboxylic acid. It has suitable hydrophilic properties so that water can quickly diffuse in the superabsorbent polymer particles, thereby increasing the superabsorbent polymer particles. Waterproof effect. The yarn is coated wit...

Embodiment 3-5

[0102] Aqua Keep  SHP10 polymer on a stand by Condux  Condux produced by Maschinenbau GmbH & Co  Dry grinding twice in CGS jet mill, this polymer has the following particle size:

[0103] 50% of the particles are below 9μm;

[0104] 10% of the particles are below 4μm;

[0105] 90% of the particles are below 15 μm.

[0106] The milled polymer was used to prepare the dispersions in Example 2, which were made from varying amounts of superabsorbent polymer and the oil in Example 2. A yarn with a linear density of 1580 dtex was coated according to Example 2, the coating weights being stated as follows:

[0107] Oil % (weight) SAP * % (weight) column test time

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Abstract

The present invention relates to a fiber coated with a water blocking material that includes an essentially water free dispersion comprising a superabsorbent polymer and a dispersing medium. The fibers made according to this invention may be used, for example, as fiber reinforcing material used in the manufacture of cables, and in particular in yarns for fiber optical cables that use optical light wave guides for optical communication transmissions.

Description

[0001] This application is a divisional application. The filing date of the original application was November 22, 1999, the application number was 99813549.6, and the title of the invention was "fiber coated with waterproof material". field of invention [0002] The invention relates to the application of a waterproof material (Water blocking material) coated on the fiber surface, which can be used for optical cables to prevent water from immersing into the optical cables. technical background [0003] A number of methods are known for treating substrates with waterproofing materials. In special fibres, fibrous materials or yarns are impregnated with waterproofing materials in applications where water is undesirable. [0004] For example, waterproofing materials are applied to fiber optic cables to prevent water from infiltrating and spreading into the cable. Fiber optic cables are usually made by wrapping the waveguide with reinforcing fibers that prevent the cable from st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/28C03CC03C25/10C03C25/26D06MD06M13/507D06M13/513D06M15/00D06M15/03D06M15/263D06M15/267D06M15/285D06M15/643D06M15/647D06M23/08D06M23/10D06M101/00D06M101/36G02BG02B6/44H01BH01B7/282H01B7/288H01B11/00
CPCD06M23/08D06M15/643Y10S526/922G02B6/4494D06M15/647D06M15/285D06M23/10C03C25/26D06M15/263H01B7/288D06M13/507D06M13/513Y10S526/902Y10T428/2933Y10T428/2913Y10T428/2969Y10T428/2927Y10T428/2929G02B6/44384D06M15/03
Inventor S·雷布伊拉特F·V·普菲斯特
Owner EI DU PONT DE NEMOURS & CO
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