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Catalyst for preparing polycaprolactone polyol

A technology of polycaprolactone and catalyst is applied in the field of catalyst for preparing polycaprolactone polyol and producing polycaprolactone polyol, and can solve the problems of unsuitability for application, difficulty in removing heavy metal residues, unfavorable preparation of polyurethane and the like

Inactive Publication Date: 2019-01-25
四川琢新生物材料研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Acid-base compounds are also studied and reported as catalysts, but the polymer materials prepared by this method are extremely difficult to remove heavy metal residues, especially polycaprolactone polyols, and the products contain acid, alkali and tin salt heavy metals, which are not conducive to use. To prepare polyurethane, it is not suitable for some specific fields such as biomedicine and microelectronics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] In a 1-liter glass bottle, add 300 grams of CL, 9.3 grams of MEG, replace with nitrogen three times, then add 0.3 grams of magnesium 2-ethylhexanoate under the protection of nitrogen, heat to 130-160 degrees for 12 hours, remove unreacted in vacuum The raw material is cooled to room temperature to obtain 305 grams of polycaprolactone polyols, measured by nuclear magnetic resonance and calculated molecular weight is 2000, measured molecular weight distribution 1.18 through GPC, hydroxyl value 55.9mg KOH / g.

Embodiment 2

[0013] In a 1-liter glass bottle, add 300 grams of CL and 9.3 grams of BDO, replace it with high-purity nitrogen three times, then add 3 grams of magnesium 2-ethylhexanoate under the protection of nitrogen, heat it to 160-180 degrees for 12 hours, and remove it in vacuum The unreacted raw material is cooled to room temperature to obtain 308 grams of polycaprolactone polyols, measured by nuclear magnetic resonance and calculated molecular weight is 3000, measured molecular weight distribution 1.21 through GPC, hydroxyl value 36.5mg KOH / g.

Embodiment 3

[0015] In a 3-liter glass bottle, add 2000 grams of CL and 232 grams of NEO, replace it with high-purity nitrogen three times, then add 0.2 grams of magnesium 2-ethylhexanoate under the protection of nitrogen, heat to 160-180 degrees for 12 hours, and remove in vacuum The unreacted raw material is cooled to room temperature to obtain 2230 grams of polycaprolactone polyols, measured by nuclear magnetic resonance and calculated molecular weight is 1000, measured molecular weight distribution 1.30 through GPC, hydroxyl value 113mg KOH / g.

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Abstract

The invention discloses a catalyst for preparing polycaprolactone polyol. The polycaprolactone polyol is obtained by taking a caprolactone monomer and an initiator-alcohol as raw amterials and reacting under the action of the catalyst, wherein the catalyst is magnesium 2-ethylhexoate, the initiator-alcohol refers to independently using one of neopentyl glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, trimethylolpropane, pentaerythritol, glycol and the like, and the using amount of the initiator-alcohol can be regulated according to the magnitude of molecular weight of a required product.

Description

technical field [0001] The invention relates to a method for producing polycaprolactone polyol, in particular to a catalyst for preparing polycaprolactone polyol. Polycaprolactone polyol is a main raw material for preparing polyurethane and belongs to the field of polymer materials. Background technique [0002] Polyurethane prepared from polycaprolactone polyol has good mechanical and elastic properties, and has been widely used in the preparation of elastomers, rigid flexible foams, adhesives and coatings, etc., in furniture, shoemaking, construction, automobiles, etc. Widely used in industry. At present, the preparation method of polylactone is basically to use caprolactone as the main raw material and alcohol as the initiator to carry out ring-opening polymerization of caprolactone under the action of a catalyst. Different alcohol initiators can obtain different types of polylactones. product. There have been a lot of researches on the ring-opening polymerization of la...

Claims

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Application Information

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IPC IPC(8): C08G63/08C08G63/83
CPCC08G63/08C08G63/823
Inventor 袁明虎郑玲
Owner 四川琢新生物材料研究有限公司