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Preparation method of rosin-based IPDI type bacteriostatic polyurethane

A polyurethane and rosin-based technology, which is applied in the field of preparation of antibacterial polyurethane, can solve the problems of endangering health, causing diseases, reducing utilization value, etc., and achieves the effect of wide application, good antibacterial performance and good antibacterial property

Inactive Publication Date: 2019-11-22
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The bacteria that grow in polyurethane materials during use or storage may cause diseases and endanger people's health, which seriously affects the safety of polyurethane materials used in medical and food fields, greatly reducing their utilization value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 100.0 parts by mass of acrylic rosin GMA ester (RAG) with 320 parts by mass of analytically pure acetone, add 0.7 parts by mass of chemically pure dibutyltin dilaurate (DBTDL), disperse evenly, and transfer to a tube equipped with a stirring bar and a reflux condenser , thermometer, and nitrogen protection device in the reaction kettle, at 400r·min -1 Under stirring, after heating to 55°C in a water bath, 64.23 parts by mass of isophorone diisocyanate (IPDI) with a purity of 99% was added for reaction. Aqueous chain extender N-methyldiethanolamine (MDEA), react until the -NCO content drops to 0, lower the reaction temperature to 25°C, add 7 parts by mass of analytically pure glacial acetic acid for neutralization for 20 minutes, add 30 mL of deionized water, at 1300rmin -1 Emulsify under the rotating speed of 15 minutes, remove acetone through decompression distillation at last, obtain the rosin base IPDI type bacteriostatic aqueous polyurethane emulsion (RWPU...

Embodiment 2

[0018] Dissolve 100.0 parts by mass of rosin acrylic acid GMA ester (RAG) with 320 parts by mass of analytically pure acetone, add 0.7 parts by mass of chemically pure dibutyltin dilaurate (DBTDL), disperse evenly, and transfer to a place equipped with a stirring bar, a reflux condenser, In the reaction kettle with thermometer and nitrogen protection device, at 400r·min -1 Under stirring, after the water bath was heated to 55°C, 64.23 parts by mass of isophorone diisocyanate (IPDI) with a purity of 99% was added for reaction. Aqueous chain extender N-methyldiethanolamine (MDEA), react until the -NCO content drops to 0, lower the reaction temperature to 25°C, add 6 parts by mass of analytically pure glacial acetic acid for neutralization for 20 minutes, add 30 mL of deionized water, at 1300r min -1 Emulsify under the rotating speed of 15 minutes, remove acetone through decompression distillation at last, obtain the rosin base IPDI type bacteriostatic aqueous polyurethane emuls...

Embodiment 3

[0020] Dissolve 100.0 parts by mass of acrylic rosin GMA ester (RAG) with 320 parts by mass of analytically pure acetone, add 0.7 parts by mass of chemically pure dibutyltin dilaurate (DBTDL), disperse evenly, and transfer to a tube equipped with a stirring bar and a reflux condenser , thermometer, and nitrogen protection device in the reaction kettle, at 400r·min -1 Under stirring, after the water bath was heated to 55°C, 64.23 parts by mass of isophorone diisocyanate (IPDI) with a purity of 99% was added for reaction. Aqueous chain extender N-methyldiethanolamine (MDEA), react until the -NCO content drops to 0, lower the reaction temperature to 25°C, add 7 parts by mass of analytically pure glacial acetic acid for neutralization for 20 minutes, add 30 mL of deionized water, at 1300r min -1 25 DEG C of emulsifying 15 minutes under the rotating speed of 15 minutes, finally remove acetone through decompression distillation, obtain the rosin base IPDI type antibacterial aqueous...

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Abstract

The invention discloses a preparation method of rosin-based IPDI typebacteriostatic polyurethane. Cheap, easily available and natural renewable resource rosin is used as a raw material. The method includes modifying double bonds and carboxyl in the rosin structure to synthesize rosin acrylic acid adduct GMA diol (RAG); reacting the RAG with isophorone diisocyanate (IPDI) to generate a prepolymer under the condition that acetone is used as a solvent; and reacting the prepolymer with a chain extender that is N-methyldiethanolamine (MDEA) to successfully prepare a rosin-based IPDI type waterbornepolyurethane emulsion with bacteriostatic activity. Through inhibition zone method tests, it is found that the waterborne polyurethane emulsion has a remarkable killing effect on Staphylococcus aureus and Escherichia coli and has good bacteriostatic performance. The method endows rosin with a wider utilization way, and the bacteriostatic polyurethane is expected to be widely applied to the fieldsof medical treatment and public health, bioengineering, food packaging and the like.

Description

technical field [0001] The invention relates to a method for preparing antibacterial polyurethane by using rosin as raw material. [0002] technical background [0003] Polyurethane (PU) is a block polymer in which soft and hard segments alternately appear by polymerization of polyisocyanate, polyester polyol or polyether polyol compound and a small molecule chain extender, in which the soft segment is generally composed of The composition of oligomers such as polyester or polyether polyol mainly affects the flexibility of the product; while the hard segment is generally composed of isocyanate groups and chain extenders, which affect the rigidity and hardness of the material, because polyurethane itself has good mechanical properties. It is widely used in paints, coatings, adhesives, leather finishing agents, inks, etc. because of its excellent performance and processability. However, most of the petroleum-based raw materials used to prepare polyurethane at this stage are no...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/67C08G18/32
CPCC08G18/3275C08G18/67C08G18/755
Inventor 张发爱单建行余彩莉邵金涛
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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