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Method for producing urethane elastomer and application

A polyurethane elastomer and production method technology, applied in the direction of single-component polyurethane artificial filament, can solve the problems of unsatisfactory performance in elongation and elastic recovery rate, unstable product quality, cumbersome production operations, etc., and achieve elongation Excellent elongation and uniformity, easy control, and low manufacturing cost

Active Publication Date: 2008-03-26
SHANGHAI YITAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the two-step method, the production operation is cumbersome, the manufacturing cost is high, and the equipment investment is large; the use of this elastomer to manufacture elastic fiber will make the product quality unstable, and the performance in terms of elongation and elastic recovery is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Use component A: polyether polyol or polyester polyol or their mixture, the ratio of the two components in the mixture is not limited;

[0026] Component B: organic diisocyanate;

[0027] Component C: chain extender small molecule diol;

[0028] The polyether polyol is one or a mixture of polytetrahydrofuran (PTMG) and polypropylene oxide diol, and the ratio of the two components in the mixture is not limited; the polyester polyol is polyethylene glycol Polyethylene glycol ester diol (PEA), polyethylene adipate-propylene glycol ester diol, polyadipate-1,4-butylene glycol ester diol (PBA), polyadipate A mixture of one or any combination of ethylene glycol ester diol (PDA), polycaprolactone diol, and polycarbonate diol, and the ratio of each component in the mixture is not limited. Described organic diisocyanate is: 4,4'-diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), xylylene diisocyanate (XDI), 1,5-naphthalene diisocyanate (NDI) , hexamethylene diisoc...

Embodiment 2

[0038] Use A component: polyether polyol or polyester polyol or their mixture;

[0039] Component B: organic diisocyanate;

[0040] Component C: chain extender small molecule diol;

[0041] The polyether polyol is one or a mixture of polytetrahydrofuran (PTMG) and polypropylene oxide diol, and the ratio of the two components in the mixture is not limited; the polyester polyol is polyethylene glycol Polyethylene glycol ester diol (PEA), polyethylene adipate-propylene glycol ester diol, polyadipate-1,4-butylene glycol ester diol (PBA), polyadipate One or any combination of ethylene glycol ester diol (PDA), polycaprolactone diol, polycarbonate diol, and the ratio of each component in the mixture is not limited. Described organic diisocyanate is: 4,4'-diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), xylylene diisocyanate (XDI), 1,5-naphthalene diisocyanate (NDI) , hexamethylene diisocyanate (HDI), p-phenylene diisocyanate (PPDI), or a mixture of any combination, ...

Embodiment 3

[0050] First select polytetrahydrofuran (PTMG) and poly-1,4-butylene adipate diol (PBA) according to the formula ratio in Table 1 below, heat to 80 ° C, and add dibutyltin dilaurate, dilaurate The mass ratio of dibutyltin to tetrahydrofuran (PTMG) and polyadipate-1,4-butylene glycol ester diol (PBA) is 0.01:1000~0.5:1000, and phenylmethane diisocyanate (MDI) (heated to 65°C), 1,4-butanediol (BDO) (heated to 80°C), so that each component is in a molten state, and after being accurately metered by the metering system (metering pump), it continuously enters the barrel at a temperature of 180-260 A twin-screw extruder (70mm in diameter, L / D ratio of 40) within the temperature range of ℃, at a speed of 50 to 180 rpm, performs bulk melt polymerization, after extrusion, into water, for water Then granulate, so as to obtain polyurethane elastomer particles.

[0051] Vacuum-dry the obtained polyurethane elastomer particles in the range of 80-110° C. for 16-32 hours. Afterwards, the o...

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PUM

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Abstract

The process of producing polyurethane elastomer with the material including one component A of polyether glycol and / or polyester polyol, one component B of organic diisocyanate and one component C of small molecular diol as the chain expanding agent, includes the following steps: melting the components while adding organic tin catalyst in 0.001-0.05 wt% to the component A, metering precisely with one metering system, and mixing and bulk polymerizing in a double screw extruder with precise temperature control system at 180-260 deg.c for 3-15 min to obtain the polyurethane elastomer. The polyurethane elastomer is applied in melt spinning to produce elastic polyurethane fiber. The production process is simple, easy in control and low in cost, and elastic polyurethane fiber produced with the polyurethane elastomer has high quality.

Description

technical field [0001] The invention relates to a production method and application of a polyurethane elastomer. Background technique [0002] The existing production method of polyurethane elastomer is to form the polyurethane prepolymer formed by high molecular diol and organic diisocyanate and the low molecular diol of specified amount, the total amount of the hydroxyl groups of the above high molecular diol and low molecular diol / the above diol The molar ratio of the isocyanate group of isocyanate is in the range of 0.95-1.05, fully mixed in a screw extruder for 1-10 minutes, and made to carry out bulk in the temperature range of 240-270°C Melt polymerization produces polyurethane. The specific process is to adopt the prepolymer method production process, send the specified amount of high-molecular diol and organic diisocyanate into the high-speed mixer for thorough mixing; react the obtained monomer mixture with the chain extender small-molecule diol to form polyuret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/42C08G18/24C08G18/76B29C47/40D01F6/70B29C48/40
CPCB29C48/40
Inventor 张勇
Owner SHANGHAI YITAN NEW MATERIAL CO LTD
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