CN103923266A

CN103923266A - Synthesis method of polyurethane

Info

Publication number: CN103923266A
Application number: CN201410189724.5A
Authority: CN
Inventors: 娄志
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-05-07
Filing date: 2014-05-07
Publication date: 2014-07-16

Abstract

The invention relates to a synthesis method of polyurethane. The method comprises the following steps: a, under the protection of dry inert gas, feeding dehydrated polyether glycol, castor oil, isophorone diisocyanate and dibutyltin dilaurate into a reactor, and stirring; feeding 1, 4-butanediol into the reactor, stirring and carrying out reaction; feeding dimethylol propionic acid, epoxy resin and trimethylolpropane into the reactor, carrying out reaction, cooling and feeding methyl methacrylate into the reactor; b, carrying out neutralization and emulsification on prepolymer at room temperature by triethylamine to obtain emulsion A; c, carrying out neutralization and emulsification on the prepolymer by the triethylamine to obtain emulsion B; d, heating the emulsion A and the emulsion B up to 75-80 DEG C, feeding an initiator, and carrying out heat preservation for 2-3h; cooling and discharging to obtain the polyurethane. The method provided by the invention is simple; the produced polyurethane is better in toughness; less waste is produced in the production process; the production technology is simple, the raw material is saved, and the energy consumption in the production process is reduced.

Description

A kind of synthetic method of urethane

Technical field

The invention belongs to organic synthesis field, be specifically related to a kind of synthetic method of urethane.

Background technology

Urethane refers to a family macromolecule that contains amido formate feature unit in main chain.This macromolecular material is widely used in tamanori, coating, low speed tire, packing ring, the industrial circles such as car pad.Be used to manufacture various foams and plastic sponge at daily life field urethane.Urethane is also used to manufacture and medical devices.Urethane has good toughness and self-lubricating function, and use is now very extensive, has good use properties, the relative inorganic materials long service life of polyurethane material, result of use is good, but existing urethane synthetic method is more complicated, and the waste material of generation is difficult for removing.

Summary of the invention

The synthetic method that the object of this invention is to provide a kind of urethane, synthetic method is simple, and the middle waste material of generation is less, has reduced the discharge of refuse.

The present invention is achieved through the following technical solutions:

A kind of synthetic method of urethane, comprise the following steps: a: under the protection of drying nitrogen, by polyether glycol 30-35 part of dehydration, Viscotrol C 10-15 part, isophorone diisocyanate 20-30 part, dibutyl tin laurate 2-4 part adds reactor to stir, in reactor, add 1 again, 4-butyleneglycol 8-12 part, at 50-60 DEG C, stir 0.6-0.8h, in reactor, add dimethylol propionic acid 10-15 part again, epoxy resin 12-18 part and TriMethylolPropane(TMP) 5-8 part, reaction 0.5-1h, cooling, add methyl methacrylate 45-55 part, obtain PU/MMA prepolymer, b: by PU/MMA prepolymer with triethylamine 10-12 part at normal temperatures in and emulsification, obtain latex A, c, by PU/MMA prepolymer with during triethylamine 12-15 part is at 60 DEG C and emulsification, obtain emulsion B, d, latex A and emulsion B are heated to 85 DEG C, add initiator azo-bis-isobutyl cyanide 3-6 part, insulation 2-3 hour, cooling discharge, obtains urethane.

Beneficial effect of the present invention: method provided by the invention is simple, the urethane of production has good toughness, and in production process, waste material is less, and production technique is simple, has saved raw material use, also reduces the energy consumption in production process.

Embodiment

A kind of synthetic method of urethane, comprise the following steps: a: under the protection of drying nitrogen, add reactor to stir 3 parts of 35 parts of the polyether glycols of dehydration, 12 parts of Viscotrol C, 25 parts of isophorone diisocyanates, dibutyl tin laurate, in reactor, add 1 again, 9 parts of 4-butyleneglycols, at 55 DEG C, stir 0.6h, again to adding 5 parts of 12 parts of dimethylol propionic acids, 15 parts of epoxy resin and TriMethylolPropane(TMP)s in reactor, reaction 0.5h, cooling, add 55 parts of methyl methacrylates, obtain PU/MMA prepolymer; B: by PU/MMA prepolymer with 10 parts of triethylamines at normal temperatures in and emulsification, obtain latex A; C, by PU/MMA prepolymer with during 14 parts of triethylamines are at 60 DEG C and emulsification, obtain emulsion B; D, latex A and emulsion B are heated to 85 DEG C, add 5 parts of initiator azo-bis-isobutyl cyanides, be incubated 3 hours, cooling discharge, obtains urethane.

Claims

1. the synthetic method of a urethane, it is characterized in that, comprise the following steps: a: under the protection of drying nitrogen, by polyether glycol 30-35 part of dehydration, Viscotrol C 10-15 part, isophorone diisocyanate 20-30 part, dibutyl tin laurate 2-4 part adds reactor to stir, in reactor, add 1 again, 4-butyleneglycol 8-12 part, at 50-60 DEG C, stir 0.6-0.8h, in reactor, add dimethylol propionic acid 10-15 part again, epoxy resin 12-18 part and TriMethylolPropane(TMP) 5-8 part, reaction 0.5-1h, cooling, add methyl methacrylate 45-55 part, obtain PU/MMA prepolymer, b: by PU/MMA prepolymer with triethylamine 10-12 part at normal temperatures in and emulsification, obtain latex A, c, by PU/MMA prepolymer with during triethylamine 12-15 part is at 60 DEG C and emulsification, obtain emulsion B, d, latex A and emulsion B are heated to 85 DEG C, add initiator azo-bis-isobutyl cyanide 3-6 part, insulation 2-3 hour, cooling discharge, obtains urethane.