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Polycarbonate polyol and application thereof

A technology of polycarbonate and polyol, applied in the field of polycarbonate polyol, can solve the problem that polycarbonate polyol cannot provide elastomer, etc.

Pending Publication Date: 2022-03-01
DALIAN CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem to be solved by the present invention is that existing polycarbonate polyols cannot provide elastomers with high mechanical strength, high abrasion resistance and high light transmittance

Method used

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  • Polycarbonate polyol and application thereof
  • Polycarbonate polyol and application thereof
  • Polycarbonate polyol and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0063] 1.3. Preparation of polycarbonate polyols

[0064] 1.3.1. Transesterification of carbonates and polyols

[0065] The polycarbonate polyol of the present invention can be obtained by transesterifying a carbonate ester and a polyol. In some embodiments of the present invention, the polycarbonate polyol is obtained by performing transesterification reaction between carbonate ester and polyol in the presence of a catalyst.

[0066] Examples of catalysts that can be used to prepare polycarbonate polyols include, but are not limited to, metals, metal salts, metal alkoxides, metal oxides, metal hydrides, metal hydroxides, metal carbonates, metal amides, and metal boron salt. Examples of the foregoing metals include, but are not limited to, lithium, sodium, potassium, magnesium, calcium, strontium, barium, aluminum, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, gallium, germanium, zirconium, niobium, Molybdenum, ruthenium, rhodium, palladium, s...

Synthetic example 1

[0096] In a glass round-bottomed flask equipped with a rectifying tube, a stirrer, a thermostat and a nitrogen inlet tube, add the following raw materials: 1004 grams of dimethyl carbonate, 556 grams of 1,4-butanediol, 251 grams of 2- Butyl-2-ethyl-1,3-propanediol, 58 grams of 3-methyl-1,5-pentanediol, and 0.1 grams of tetrabutoxytitanium (catalyst). Next, stirring was carried out under normal pressure and nitrogen flow conditions, and transesterification reaction was performed for 8 hours while distilling off the mixture of methanol and dimethyl carbonate. During the transesterification reaction, the reaction temperature was slowly raised from 95°C to 150°C, and the composition of the distillate was adjusted to an azeotropic composition of methanol and dimethyl carbonate. Thereafter, the pressure was gradually reduced to 100 Torr, and a transesterification reaction was further performed for 1 hour while distilling off a mixture of methanol and dimethyl carbonate under conditi...

Synthetic example 2

[0098] Prepare the polycarbonate diol of Synthesis Example 2 in the same manner as Synthesis Example 1, but add the following raw materials instead: 829 grams of dimethyl carbonate, 312 grams of 1,4-butanediol, 477 grams of 2-butane 2-ethyl-1,3-propanediol, 57 grams of 3-methyl-1,5-pentanediol, and 0.24 grams of tetrabutoxytitanium (catalyst). The weight of the polycarbonate diol in Synthesis Example 2 was 1032 g, and the hydroxyl value was 54.77 mgKOH / g.

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Abstract

The present invention provides a polycarbonate polyol comprising a repeating unit represented by the following formula (I) and a terminal hydroxyl group: in the formula (I), R is a substituted or unsubstituted C2 to C20 divalent aliphatic group, in the 1H-NMR pattern of the polycarbonate polyol, the signal at 4.00 ppm to 4.50 ppm has an integral value A, the signal at 0.90 ppm to 1.10 ppm has an integral value D, the ratio of D to A (D / A) is 0.03 to 1.45, and the ratio of D to A (D / A) is 0.03 to 1.45. The 1H-NMR spectrum is obtained by measuring by taking deuterated chloroform as a solvent and tetramethylsilane as a reference substance.

Description

technical field [0001] The present invention relates to a polycarbonate polyol, in particular to a polycarbonate diol. The present invention also relates to an elastomer precursor and elastomer provided by using the polycarbonate polyol. Background technique [0002] Polycarbonate polyol is a material with good hydrolysis resistance, light resistance, oxidative degradation resistance and heat resistance, which can be used to prepare elastomers, paints, coatings or adhesives. It is known that incorporation of specific branched-chain alcohols into polycarbonate polyols can increase the light transmittance of elastomers, but this will reduce the mechanical strength of elastomers, which is not conducive to the production of high mechanical strength products (such as sports equipment). [0003] Therefore, there is still a need for a polycarbonate polyol that can be used to prepare elastomers with high mechanical strength, high wear resistance and high light transmittance. Con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/30C08G64/02C08G18/66C08G18/44C08G18/32C08G18/76C08J5/18C08L75/04
CPCC08G64/305C08G64/0208C08G18/44C08G18/664C08G18/3206C08G18/7671C08J5/18C08J2375/04C08G18/246C08G18/0852C08G64/02C08L75/04
Inventor 谢维纶王兴运
Owner DALIAN CHEM IND CO LTD
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