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Polyurethane retardation catalyst and its preparation method and application

A delayed and polyurethane technology, which is applied in the field of delayed catalysts for polyurethane foaming, can solve problems such as unsatisfactory delayed effects and failure to meet requirements, and achieve excellent delayed catalytic effects

Active Publication Date: 2017-02-22
ZHEJIANG HUAFON NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The catalysts disclosed in the above patents all have the defect of unsatisfactory retardation effect, and cannot meet the requirements of the production process for retardation catalysts.

Method used

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  • Polyurethane retardation catalyst and its preparation method and application
  • Polyurethane retardation catalyst and its preparation method and application
  • Polyurethane retardation catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The triethylenediamine (moisture content 2%) that takes by weighing 114g (1.0mol) is dissolved in 300ml ethanol and joins in the 250ml there-necked flask, then places in ice-water bath, takes by weighing 155g (1.0mol) diethyl sulfate ( Moisture content 0.9%) after being dissolved in 300ml ethanol, join in the 500ml constant pressure funnel, fix the constant pressure funnel on the three-necked flask, add diethyl sulfate+ethanol mixture dropwise in the three-necked flask, wait for the solution to drip After the addition was complete, the temperature of the water bath was raised to 25°C for two hours of reaction. The whole process needs to be stirred with a magnet to ensure that the reactants are fully mixed. After completion of the reaction, ethanol was removed by rotary evaporation under reduced pressure at 70°C, and finally, vacuum-dried at 70°C for 48 hours to obtain triethylenediamine diethyl sulfate salt.

Embodiment 2

[0031] (1) 6.00kg molecular weight is 1500 polyhexamethylene adipate, 4.00kg molecular weight is 1500 polytetrahydrofuran diol, 0.12kg triethylenediamine diethyl sulfate salt, 0.01kg distilled water, 0.05kg organosilicon Foaming agent, 0.70kg 1,4-butanediol mixed evenly, as component A of polyurethane resin; (2) 1.16kg polyhexamethylene adipate, 3.87kg 4,4'-xylene methane diisocyanate (MDI ) mixed reaction, control the reaction temperature to 60°C, and after 4 hours of reaction time, use it as component B of polyurethane resin.

Embodiment 3

[0033] (1) 5.00kg molecular weight is 2000 polyhexamethylene adipate, 5.00kg molecular weight is 2000 polytetrahydrofuran diol, 0.15kg triethylenediamine diethyl sulfate salt, 0.03kg distilled water, 0.08kg organic silicon Foam stabilizer, 0.40kg ethylene glycol and 0.60kg 1,4-butanediol are mixed uniformly as component A of polyurethane resin; (2) 2.47kg polyhexamethylene adipate, 4.95kg 4,4'-xylene Mix reaction of methane diisocyanate (MDI), control the reaction temperature to 80°C, and react for 3 hours, then use it as component B of polyurethane resin.

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PUM

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Abstract

The invention provides a polyurethane retardant catalyst, and a preparation method and application thereof. The polyurethane retardant catalyst is a reaction product of diethyl sulfate and triethylenediamine. Compared with the existing amine catalyst, the polyurethane retardant catalyst has better catalysis retarding effect.

Description

technical field [0001] The invention relates to a polyurethane catalyst, in particular to a delayed catalyst for polyurethane foaming. Background technique [0002] In order to prolong the flow time of polyurethane resin in the mold, accelerate the final polymerization rate and curing rate of polyurethane, reduce the residence time of products in the mold, and improve the utilization rate of the mold, the molding process often requires the use of delayed catalysts. Polyurethane delayed catalyst is a kind of special polyurethane catalyst which has mild catalytic efficiency in the early stage and does not affect the later curing speed of the product compared with traditional catalysts. Excellent fluidity, but does not prolong the curing time and demoulding time of the product. [0003] 200880014960.6 Chinese patent application discloses a mixture of triethylenediamine and triazine as a polyurethane catalyst. Chinese patent ZL200710110026 discloses one or more tertiary amine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/20C08G18/66C08G18/48C08G18/42C08G18/32
CPCC08G18/2054C08G18/4018C08G18/4236C08G18/425C08G18/4277C08G18/4825C08G18/4854C08G18/6674
Inventor 赵叶宝杜春毅章海飞林剑章芬成林孝宾
Owner ZHEJIANG HUAFON NEW MATERIALS CO LTD
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