Preparation method of polymeric material for neutral paper-making

A polymeric material and neutral technology, applied in papermaking, paper coating, textiles and papermaking, etc., can solve problems such as pipeline corrosion, increased energy loss, and shortened equipment life

Inactive Publication Date: 2018-12-07
宁波高新区诠宝绶新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Rosin glue and the above inventions are an acidic sizing system with a pH value of about 4-6, which will cau

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing a neutral polymeric material for papermaking, the preparation technical scheme is as follows:

[0018] According to the number of parts by mass, add 80 parts of modified polyether diol and 45 parts of diphenylmethane diisocyanate into the reaction kettle, then use high-purity nitrogen protection, control the temperature in the kettle to 70 ° C, and melt under stirring conditions After uniformity, drop 13 parts of acetone solution containing 0.15 parts of catalyst into the reaction kettle, then add 0.3 parts of 5-boric acid pinacol ester indole-2-one, 0.1 part of 3,6-carbazole dicarboxylic acid dimethyl Esters, 0.05 parts of 6-amino-2,3-dihydroindan-1-one, 0.08 parts of polymethyleneoxybicyclic oxazolidine, 0.1 parts of polyvinyl imidazolinium acetate, reacted for 110min; then Cool down to 35°C, add 5 parts of chain extender, stir and react for 70 minutes, then add 500 parts of purified water into the reaction kettle under high-speed stirring, and ...

Embodiment 2

[0026] A method for preparing a neutral polymeric material for papermaking, the preparation technical scheme is as follows:

[0027] According to the number of parts by mass, add 75 parts of modified polyether diol and 40 parts of diphenylmethane diisocyanate into the reaction kettle, then use high-purity nitrogen protection, control the temperature in the kettle to 60°C, and melt under stirring conditions After uniformity, drop 10 parts of acetone solution containing 0.05 parts of catalyst into the reaction kettle, then add 0.1 parts of 5-boric acid pinacol ester indole-2-one, 0.05 parts of 3,6-carbazole dicarboxylic acid dimethyl Esters, 0.01 parts of 6-amino-2,3-dihydroindan-1-one, 0.05 parts of polymethyleneoxybicyclic oxazolidine, 0.01 parts of polyvinyl imidazolinium acetate, reacted for 80min; then Cool down to 30°C, add 2 parts of chain extender, stir and react for 45 minutes, then add 400 parts of purified water into the reaction kettle under high-speed stirring, and ...

Embodiment 3

[0035] A method for preparing a neutral polymeric material for papermaking, the preparation technical scheme is as follows:

[0036] According to the number of parts by mass, 85 parts of modified polyether diol and 55 parts of diphenylmethane diisocyanate were added to the reaction kettle, and then protected by high-purity nitrogen, the temperature in the kettle was controlled at 80°C, and melted under stirring conditions After uniformity, drop 15 parts of acetone solution containing 0.35 parts of catalyst into the reaction kettle, then add 0.7 parts of 5-boric acid pinacol ester indole-2-one, 0.5 parts of 3,6-carbazole dicarboxylic acid dimethyl Esters, 0.2 parts of 6-amino-2,3-dihydroindan-1-one, 0.2 parts of polymethyleneoxybicyclic oxazolidine, 0.2 parts of polyvinyl imidazolinium acetate, reacted for 150min; then Cool down to 40°C, add 8 parts of chain extender, stir and react for 90 minutes, then add 600 parts of purified water into the reaction kettle under high-speed s...

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PUM

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Abstract

The invention relates to the field of paper-making auxiliaries, in particular to a preparation method of a polymeric material for neutral paper-making. The preparation method of the polymeric materialfor neutral paper-making is characterized in that alkyl ketene dimer is prepared, modified polyether glycol is prepared, and the modified polyether glycol is uniformly melted with diphenylmethane diisocyanate, and then an acetone solution of a catalyst is dropwise added, a chain extender is added after reaction is carried out, and then purified water is added and is stirred at high speed to prepare aqueous polyurethane neutral sizing agent emulsions. By adopting the neutral sizing agent, chemical corrosion of mechanical equipment can be greatly reduced, paper breaking phenomenon is reduced, the downtime of a paper machine is shortened, the dryness of paper sheets is improved, the papermaking speed is accelerated, and thus, the production ability of the paper sheets can be improved.

Description

technical field [0001] The invention relates to the field of preparation of papermaking auxiliary agents, in particular to a preparation method of a neutral polymeric material for papermaking. Background technique [0002] In order to ensure that the paper has a certain water resistance and surface strength, most paper and cardboard need sizing treatment. The early sizing agent is rosin glue, in order to meet better paper strength, printing effect and longer storage The time limit, people are full early, and the sizing agent is continuously improved. [0003] CN101068986A discloses a stable aqueous dispersion comprising a reactive sizing agent, based on the reactive sizing agent 5-100% by weight of a substantially linear nitrogen-containing polymer having at least 3mmol / g basic nitrogen atoms, and 1-50% by weight Paper sizing agent with a cationic starch with a % substitution of at least 0.05. The paper sizing agent has good sizing effect and stable viscosity. [0004] CN...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H17/57D21H19/24C08G18/48C08G18/32C08G18/66
CPCC08G18/3206C08G18/4825C08G18/6674D21H17/57D21H19/24D21H21/16
Inventor 王大可王光辉
Owner 宁波高新区诠宝绶新材料科技有限公司
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