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Transparent polyurethane elastomer and preparation method thereof

A polyurethane elastomer, transparent technology, applied in the field of transparent polyurethane elastomer and its preparation, can solve the problem of low tensile strength of polyurethane elastomer

Active Publication Date: 2021-10-22
盛鼎高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tensile strength of the polyurethane elastomer prepared from the polyurethane elastomer composite material is low

Method used

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  • Transparent polyurethane elastomer and preparation method thereof
  • Transparent polyurethane elastomer and preparation method thereof
  • Transparent polyurethane elastomer and preparation method thereof

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preparation example Construction

[0043]

[0044] The preparation method of the transparent polyurethane elastic body of the present invention comprises the following steps: mixing the polypolyol mixture component and the curing agent component, vacuum defoaming to obtain the mixture; curing the mixture to obtain the transparent polyurethane elastic body.

[0045] The composition of the polypolyol mixture components is as previously described. The preparation method of the polypolyol mixture component comprises the following steps: vacuum dehydrating the polycarbonate diol; and dehydrating the dehydrated polycarbonate diol, chain extender, catalyst and The heat stabilizer is mixed to obtain a polypolyol mixture component.

[0046] The vacuum dehydration temperature is 100-150°C; preferably 110-140°C; more preferably 110-130°C. The vacuum dehydration time is 0.5-5 hours; preferably 1-4 hours; more preferably 1.5-3 hours. This can fully dehydrate and reduce the occurrence of side reactions.

[0047] The mix...

Embodiment 1 and comparative example 1～6

[0062] Referring to Table 1, 100 parts by weight of polymer polyol was vacuum dehydrated at 120°C for 2 hours; ), 1,4-cyclohexanedimethanol (chain extender B), dibutyltin dilaurate (catalyst) and IRGANOX 1010 (heat stabilizer) were stirred for 15min at a stirring rate of 800rpm to obtain a polypolyol mixture component . Add polyisocyanate-based compounds to 4,4'-dicyclohexylmethane diisocyanate (diisocyanate) at 80°C under nitrogen protection conditions, and then mix uniformly at a stirring rate of 800rpm; add diisocyanate and polyisocyanate UV123 (light stabilizer) was added to the mixture of base compounds, and then stirred at a stirring rate of 800 rpm for 15 minutes to obtain a curing agent component.

[0063] Add the polyol mixture component to the curing agent component, stir at 60°C and 1200rpm for 3 minutes, and then vacuum defoam to obtain the mixture; pour the mixture into a preheated mold at 110°C, and then put The mold was placed in an oven at 110° C. to cure for...

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Abstract

The invention discloses a transparent polyurethane elastomer and a preparation method thereof. The transparent polyurethane elastomer comprises a product obtained by reaction of a polyol mixture component and a curing agent component, the polyol mixture comprises the following components in parts by weight: 100 parts of polycarbonate diol, 5-20 parts of a chain extender and 0.005-0.1 part of a catalyst; the curing agent component comprises the following components in parts by weight: 20-60 parts of diisocyanate and 0.5-10 parts of a polyisocyanate group compound. The transparent polyurethane elastomer has relatively high tensile strength, light transmittance and hardness.

Description

technical field [0001] The invention relates to a transparent polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane elastomer is a block polymer composed of flexible chains of polymer polyols to form soft segments, diisocyanate and small molecule chain extenders to form hard segments, and hard segments and soft segments are arranged alternately to form repeating structural units. Under dynamic load, the linear thermoplastic polyurethane elastomer will creep, the molecular chain will slip with the external force, and the resilience is often poor. Under the action of external force, the internal heat is more serious, which accelerates the aging of materials. Traditional micro-crosslinked polyurethane elastomers, due to the change in the stacking state of molecular chains caused by crosslinking, make their optical properties not very ideal, and are mostly used in non-optical device fields such as leather or shoe sole materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/44C08G18/32C08G18/78C08G18/75
CPCC08G18/664C08G18/44C08G18/3206C08G18/3212C08G18/7812C08G18/758C08G18/725
Inventor 王超张辉
Owner 盛鼎高新材料有限公司