Method of modifying polymers

A polymer and modification technology, applied in chemical instruments and methods, artificial filaments made of cellulose derivatives, plant peptides, etc., can solve problems such as modification difficulties and achieve the effect of easy implementation

Inactive Publication Date: 2016-05-04
美真泉公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Many of these biopolymers are practically insoluble in traditional molecular solvents such as non-polar or polar organic solvents and are thus difficult to modify and can be modified by overly expensive and often toxic catalysts such as cobalt, chromium, cerium, mercury, nickel and tin (these are elements of high concern) help in extreme conditions

Method used

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  • Method of modifying polymers
  • Method of modifying polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] 1-Ethyl-3-methylimidazolium methylphosphonate (1-Ethyl-3-methylimidazoliummethylphosphonate) ([emim][MeHPO 3 ])synthesis

[0090] 1-Ethylimidazole (96.1 g, 1.00 mol) was added dropwise (within 1 hour) to pure dimethyl phosphite (110.0 g, 1.00 mol) at 85°C. The reaction was allowed to stir for an additional 18 hours at 80°C. The mixture was rotary evaporated under high vacuum at 65 °C for 18 hours to yield a clear pale yellow oil (206.0 g).

[0091] Reactants and reaction steps are also shown in figure 1 middle.

Embodiment 2

[0093] Methyltrioctylphosphoniummethylphosphonate (methyltrioctylphosphoniummethylphosphonate) ([P 8881 ][MeHPO 3 ]synthesis

[0094] Trioctylphosphine (370 g, 1.00 mol) was added dropwise (within 1 hour) to pure dimethyl phosphite (110.0 g, 1.00 mol) at 85°C under argon. The reaction was allowed to stir for an additional 18 hours at 80°C. The mixture was rotary evaporated under high vacuum at 65 °C for 18 hours to yield a clear pale yellow oil (480 g).

Embodiment 3

[0096] with [emim][MeHPO 3 ] Modification of prehydrolyzed kraft (PHK) pulp at 130 °C

[0097] [emim][MeHPO 3 ] 95 g was added to a flask containing PHK (5 g). The mixture was stirred at 130° C. for 18 hours under an argon atmosphere. The reaction mixture was diluted with an equal volume of methanol and filtered through a G3 sintered funnel. The crude product was precipitated by slow addition of acetone (3 volumes). The precipitate was washed with additional acetone:methanol (95:5). The material was reprecipitated using the same methanol acetone precipitation and volume. The resulting sample was then dried in a vacuum oven to yield a white powder (9.5 g). The resulting product is water soluble.

[0098] Reactants and reaction steps are also shown in figure 2 middle.

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Abstract

A method of modifying a polymer having hydroxyl groups, selected from the group of polysaccharides and lignin,to give a modified polymer comprising the step of contacting said polymer with at least one organic phosphonate salt in order to chemically modify the polymer, said organic phosphonate salt being in a liquid phase. The method of polymer modification provides novel polymers. Modified polymers obtained from a polymer having been treated with at least one organic phosphonate salt are also disclosed. The modified polymers can be used as such or separated and optionally recovered from the solution, optionally being formed into particular materials or shapes.

Description

technology field. [0001] The invention relates to a method for modifying polymers having hydroxyl groups according to the preamble of claim 1 . In this type of process an organic phosphonate salt is applied to the polymer in the liquid phase in order to chemically modify the polymer. The invention also relates to modified polymers according to the preamble of claim 22 . Furthermore, the invention relates to a solution containing said modified polymer according to the preamble of claim 31 . Background technique [0002] Polymers have been naturally provided in abundance and in various forms ranging from biopolymers including polysaccharides such as cellulose to proteins such as collagen, each capable of undergoing processing according to its own properties. [0003] A number of methods exist in the prior art for the modification of biopolymers, including, for example, the introduction of aldehyde groups into proteins, peptides or oligos by amine reactive agents or by oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/00C08B37/08
CPCC08B11/00C08B37/003C08B15/05C08B31/00C08B33/00C08B35/00C08B37/00C07K14/415C08B5/00C08L1/02C08L5/08C08L97/02D01F2/28
Inventor A.W.T.金C.塞格P.卡亨恩J.马蒂凯恩I.基尔佩莱恩
Owner 美真泉公司
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