Starch degradation/graft polymerization composition, process, and uses-thereof

A technology of composition and polymer emulsion, which is applied in starch-stabilized polymer emulsion to form starch-stabilized polymer emulsion, coating, and batch graft copolymerization technology, which can solve the problems of long processing time and so on

Inactive Publication Date: 2001-06-13
BASF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Changing reaction conditions can result in excessively long processing times

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 - Emulsion Polymer

[0051] To a 2 liter four necked round bottom flask equipped with a thermometer and temperature regulator (Thermowatch®, Research and Industrial Instruments, Cheltenham PA), condenser, mechanical stirring, nitrogen purge and heating mantle, was added 684.5 g of deionized water and 90.3 g of the starch product Penford gum230. The temperature was raised to 82°C with stirring to dissolve the starch granules and produce a viscous solution.

[0052] components

[0053] After the monomer addition was complete, the pump (pumped into the reactor) was flushed with 12.75 g deionized water, and a charge of 0.5 g APS in 7.1 g deionized water was added. The reaction was continued to stir for a duration of 1 hour, the reaction was allowed to cool, a charge of 28.1 g of deionized water was added, and the reaction solution was filtered through a 100 micron filter into a glass container. The resulting translucent to milky starch-grafted emulsion...

Embodiment 2

[0054] Example 2 - Emulsion Polymer

[0055] To a 2 liter four necked round bottom flask equipped with a thermometer and temperature regulator (Thermowatch®, Research and Industrial Instruments, Cheltenham PA), condenser, mechanical stirring, nitrogen purge and heating mantle, was added 682.3 g of deionized water and 90.3 g of the starch product Penford gum 230. The temperature was raised to 82°C with stirring to dissolve the starch granules and produce a viscous solution.

[0056] components

[0057] After the monomer addition was complete, the pump (pumped into the reactor) was flushed with 15.7 g deionized water, and a charge of 0.5 g APS in 7.1 g deionized water was added. The reaction was continued to stir for a duration of 1 hour, the reaction was allowed to cool, 12.6 g of a deionized water charge was added, and .36 g of Kathon LX-14 (a biocide manufactured by Rohm & Hass) in 6.8 g of deionized water was added. The reaction was filtered through a 100 micron ...

Embodiment 3

[0058] Example 3 - Emulsion Polymer

[0059] components

[0060] The reaction was continued to stir for an additional duration of 1 hour, the reaction was allowed to cool, and a charge of 28.1 g of deionized water was added. The reaction was filtered through a 100 micron filter into a glass vessel. The resulting translucent to milky starch-grafted emulsion polymer was homogeneous and stable, with no flocculation or settling observed.

[0061] Importantly, it should be seen that the degradation process described above can be carried out under substantially the same conditions as the polymerization process described above. Thus, substantially simultaneous degradation / copolymerization can be achieved. Overall processing time can thereby be reduced and undesired additives necessary for the finished emulsion polymer can be eliminated.

[0062] components

[0063] 750 g of 12 mm steel ball milling media was placed in a 1 pint sized tinplate can, the above form...

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Abstract

Disclosed herein are starch stabilized polymeric emulsions. Persulfate salts degrade starch to give it suitable characteristics, and then also, essentially simultaneously, initiate polymerisation with monomers. This permits a single reaction condition to be used for both the degradation step and the polymerization step, and avoids the need for use of metallic ions such as iron.

Description

Background of the invention [0001] This invention relates to starch / polymer graft emulsions. More particularly, the present invention relates to the use of persulfates to form such emulsions to substantially simultaneously degrade starch and initiate polymerization. [0002] It is often desirable to use modified starch polymers for coatings, adhesives and printing applications. By graft-copolymerizing starches with synthetic polymers, it is possible to produce products with many desired combinations of properties. See, eg, U.S. Patents 3,640,925 and 4,171,407. These patents, as well as all other publications referred to herein, are incorporated by reference herein. [0003] For particular applications, the absence of certain metal ions, such as iron, nickel, manganese, cerium and copper, is highly desirable because they tend to discolor the resulting product. This is a particular problem for products used in the printing and coating industries, such as ink binders and pain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/00C08F251/00C09D5/02C09D11/10C09D11/14C09D103/02C09D133/06C09D151/02
CPCC08F251/00C09D151/02C09D11/106C08L3/02C08L51/02C08K3/30C08K2003/3045
Inventor S·M·赫尔利F·L·托德P·E·桑德维克S·E·丹利
Owner BASF AG
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