Unlock instant, AI-driven research and patent intelligence for your innovation.

Synthesis method of polyurethane

A synthesis method and polyurethane technology, applied in the field of polyurethane synthesis, can solve the problems of complex synthesis method and difficult removal of waste, and achieve the effects of simple production process, reduced energy consumption and less waste.

Inactive Publication Date: 2014-07-16
娄志
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane has good toughness and self-lubricating function. It is widely used now and has good performance. Compared with inorganic materials, polyurethane materials have a longer service life and better use effects. However, the existing polyurethane synthesis methods are more complicated, and the waste produced is not easy to remove.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] A synthetic method for polyurethane, comprising the following steps: a: under the protection of dry nitrogen, 35 parts of dehydrated polyether glycol, 12 parts of castor oil, 25 parts of isophorone diisocyanate, 3 parts of dibutyltin dilaurate Add 9 parts of 1,4-butanediol to the reactor and stir at 55°C for 0.6h, then add 12 parts of dimethylol propionic acid and 15 parts of epoxy resin into the reactor With 5 parts of trimethylolpropane, react for 0.5h, cool down, add 55 parts of methyl methacrylate to obtain PU / MMA prepolymer; b: use 10 parts of triethylamine for PU / MMA prepolymer at room temperature Neutralize and emulsify to obtain emulsion A; c, neutralize and emulsify the PU / MMA prepolymer with 14 parts of triethylamine at 60°C to obtain emulsion B; d, heat emulsion A and emulsion B to 85°C, add 5 parts of initiator azobisisobutylcyanide, heat preservation for 3 hours, cool down and discharge to obtain polyurethane.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

technical field [0001] The invention belongs to the field of organic synthesis, and in particular relates to a method for synthesizing polyurethane. Background technique [0002] Polyurethane refers to a class of polymers containing urethane characteristic units in the main chain. This polymer material is widely used in adhesives, coatings, low-speed tires, gaskets, car mats and other industrial fields. In the field of daily life, polyurethane is used to make various foams and plastic sponges. Polyurethanes are also used in manufacturing and medical devices. Polyurethane has good toughness and self-lubricating function. It is widely used now and has good performance. Compared with inorganic materials, polyurethane materials have a longer service life and better use effects. However, the existing polyurethane synthesis methods are more complicated, and the waste produced is not easy to remove. . Contents of the invention [0003] The purpose of the present invention is ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08F283/00C08F220/14C08G18/75C08G18/67C08G18/48C08G18/32C08G18/34C08G18/58
Inventor 娄志
Owner 娄志