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Casted transparent polyurethane elastomer

A polyurethane elastomer and transparent technology, applied in the field of polyurethane materials, can solve problems such as high melting point, poor impact resistance, and influence on appearance color, and achieve the effect of excellent comprehensive performance, good impact resistance, and good transparency

Inactive Publication Date: 2016-01-20
NO 53 RES INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, inorganic transparent materials have good transparency and small color difference, but have the disadvantages of high density and poor toughness; compared with inorganic transparent materials, organic polymer transparent materials have a greatly reduced density, but some performances still have deficiencies, such as polymer Methyl methacrylate and polystyrene have poor impact resistance. Although the impact resistance of polycarbonate (PC) has improved somewhat, it has poor wear resistance and solvent resistance.
Since 4,4′-methylenebis(2-chloroaniline) is a solid with a high melting point, it is easily oxidized during heating and the color will deepen, affecting the appearance color

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The specific components by weight of a high-hardness transparent polyurethane elastomer material are: 1,6-ethylene glycol adipate diol (number average molecular weight 1000) 100, xylylene diisocyanate 44.7, dibutyltin Dilaurate 0.05, ethylene glycol 7.7.

[0024] The specific preparation method of the above-mentioned high-hardness transparent polyurethane elastomer material:

[0025] Weigh 1000g of 1,6-ethylene glycol adipate diol with a moisture content not higher than 0.5‰ and add it to the reaction kettle, heat it to 40-60°C under stirring, add 447g of xylylene diisocyanate, and React at a temperature of 80-90° C. for 3-5 hours; then vacuum defoam; obtain a prepolymer of a storage-stable high-hardness transparent polyurethane elastomer material with an NCO mass fraction of 8%.

[0026] Add 77g of ethylene glycol and 0.5g of dibutyltin dilaurate into the above-prepared prepolymer preheated to 80±0.5°C, stir evenly, pour it into a mold preheated to 90-120°C, and wait ...

Embodiment 2

[0028] The specific components by weight of a high-hardness transparent polyurethane elastomer material are: 1,6-butylene adipate diol (number average molecular weight 800) 100, glycerol 5, xylylene diol Isocyanate 58.8, transparent color paste 0.05, stannous octoate 0.1, 1,3-propanediol 12.

[0029] The specific preparation method of the above-mentioned high-hardness transparent polyurethane elastomer material:

[0030] Weigh 1000g of 1,6-butylene adipate diol and 50g of glycerol with a moisture content of not higher than 0.5‰ into the reaction kettle, heat to 40-60°C under stirring, and add 588g of phthalylene base diisocyanate, react at a temperature of 80-90°C for 3-5 hours; then add 0.5 g of transparent blue syrup, stir for 0.5 hours, and vacuum defoam; obtain a storage-stable high-hardness transparent polyurethane elastic with a mass fraction of NCO of 9% Prepolymers of bulk materials.

[0031] Add 120g of 1,3-propanediol and 1g of stannous octoate into the prepolymer ...

Embodiment 3

[0033] The specific components by weight of a high-hardness transparent polyurethane elastomer material are: polytetrahydrofuran ether glycol (number average molecular weight 600) 100, diethanolamine 10, xylylene diisocyanate 80, stannous octoate 0.3, 1 , 4-Butanediol 18.3.

[0034] The specific preparation method of the above-mentioned high-hardness transparent polyurethane elastomer material:

[0035] Weigh 1000g of polytetrahydrofuran ether glycol and 100g of diethanolamine with a moisture content of not higher than 0.5‰ into the reaction kettle, heat to 40-60°C under stirring, add 800g of xylylene diisocyanate, and heat at a temperature of 80-90 Reaction at ℃ for 3-5 hours; then vacuum defoaming; to obtain a prepolymer of a storage-stable high-hardness transparent polyurethane elastomer material with a mass fraction of NCO of 10%.

[0036] Add 183g of 1,4-butanediol and 3g of stannous octoate to the prepolymer preheated to 80±0.5°C prepared above, stir evenly, pour into a...

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Abstract

The invention belongs to the field of polyurethane materials. Polyester polyol or polyether polyol or a mixture of the polyester polyol and the polyether polyol is used as a soft section, and anti-yellowing diisocyanate is used as a hard section; the content of the hard section is increased, so that the hardness and rigidness of the material are improved. The cross-linking density of the material is increased by adopting micromolecular tri-functionality cross-linking agent. A prepolymer comprises, by mass percentage, 8 to 18 percent of NCO, the asted transparent polyurethane elastomer consists of the following components: 100 parts of polyol with number-average molecular weight of 400 to 1000, 44.7 to 277.4 parts of diisocyanate, 0 to 15 parts of cross-linking agent, 7.7 to 137 parts of curing agent, 0 to 0.5 part of catalyst and 0 to 0.5 part of transparent mill base. The elastomer is good in transparency, invariant in color, high in hardness and rigidness, good in impact resistance and excellent in comprehensive performance. The elastomer is applicable to transparent products with high requirements on the protection performance such as lamp houses, streetlamp houses, protection covers, goggles and high-speed train windows and particularly applicable to the transparent protection products such as military and police bulletproof (explosion-proof) shields and bulletproof masks.

Description

technical field [0001] The invention belongs to the field of polyurethane materials, and relates to a casting type transparent polyurethane elastomer material, in particular to a high hardness casting type transparent polyurethane elastomer material and a preparation method thereof. Background technique [0002] There are many types of transparent materials, which are widely used in daily life. Transparent materials can be divided into inorganic transparent materials and organic transparent materials according to their chemical composition. Common inorganic transparent materials mainly include glass, transparent ceramics, quartz, etc.; common organic polymer transparent materials mainly include polymethyl methacrylate ( PMMA), polycarbonate (PC), polystyrene resin (PS), etc. In general, inorganic transparent materials have good transparency and small color difference, but have the disadvantages of high density and poor toughness; compared with inorganic transparent material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/32C08G18/42C08G18/48C08G18/75C08G18/76C08G18/66
CPCC08G18/4238C08G18/10C08G18/3206C08G18/3212C08G18/3215C08G18/324C08G18/3275C08G18/3281C08G18/4018C08G18/4854C08G18/664C08G18/6644C08G18/6655C08G18/6674C08G18/6677C08G18/6688C08G18/755C08G18/7642
Inventor 翟文甄建军何金迎陈青香李英建王小伟陈强胡文阁
Owner NO 53 RES INST OF CHINA NORTH IND GRP