Polyhydroxy hyperbranched polymer, preparation method of polymer and application of polymer in dental composite resin

A technology of hyperbranched polymers and composite resins, applied in dentistry, dental preparations, dental prostheses, etc., can solve the problem of reducing the polymerization shrinkage of epoxy resins, unknown, and unpredictable effects of HBP on dental cycloaliphatic epoxy resins Function and other issues, to achieve the effect of easy industrial production and simple synthesis process

Active Publication Date: 2019-12-03
PEKING UNIV SCHOOL OF STOMATOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, those skilled in the art cannot predict the effect of HBP on dental cycloaliphatic epoxy resin, let alone know what kind of HBP can be designed to reduce the polymerization shrinkage of epoxy resin and improve the mechanical properties

Method used

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  • Polyhydroxy hyperbranched polymer, preparation method of polymer and application of polymer in dental composite resin
  • Polyhydroxy hyperbranched polymer, preparation method of polymer and application of polymer in dental composite resin
  • Polyhydroxy hyperbranched polymer, preparation method of polymer and application of polymer in dental composite resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This example is used to illustrate the polyhydroxy hyperbranched polymer of the present invention and its preparation.

[0048] (1) Weigh 151.0g (0.5mol) TMPGE and 45.0g (0.5mol) 1,4-butanediol into a 100ml three-necked flask, heat to 100°C under nitrogen protection, add 8g tetrabutyl bromide Amines were reacted for 48h.

[0049] (2) The above reaction product is cooled to room temperature, and the epoxy equivalent (EEW) is measured by the acetone hydrochloride method. According to the epoxy equivalent result, resorcinol with the same molar number as the remaining epoxy group is added. The reaction system was heated to 100°C and reacted for 10h.

[0050] (3) Cool to room temperature, add an appropriate amount of methanol to dissolve the above reaction system, then slowly pour the solution into a large amount of water under stirring conditions to purify the product, repeat the above operation three times, and after vacuum drying at 100°C, a yellow viscous and transparen...

Embodiment 2-5 and comparative example 1

[0052] This example serves to illustrate the dental composite resin of the present invention and its preparation.

[0053] (1) Alicyclic epoxy resin 3,4-epoxy cyclohexyl methyl 3,4-epoxy cyclohexyl carboxylate is calculated as 1wt%, 3wt%, 5wt% based on alicyclic epoxy resin respectively Mix with 7wt% polyhydroxyl hyperbranched polymer HBP-OH, and stir electromagnetically at 40° C. for 1 hour to make it completely mixed uniformly as the experimental group. The pure cycloaliphatic epoxy resin without adding hyperbranched polymer was used as the control group.

[0054] (2) in the mixture that step (1) obtains, add 1wt% (relative to alicyclic epoxy resin) iodonium salt OPPI and 0.5wt% (relative to alicyclic epoxy resin) Camphorkun (CQ), Covered with aluminum foil and shielded from light, stir electromagnetically until completely mixed.

[0055] (3) The mixture obtained in step (2) was degassed and placed in the dark for 24 hours.

[0056] (4) Pour alicyclic epoxy resin and HBP-...

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Abstract

The invention belongs to the field of polymer materials, and relates to a polyhydroxy hyperbranched polymer, a preparation method of the polymer and an application of the polymer in dental composite resin. The polyhydroxy hyperbranched polymer has a structure represented by a formula I shown in the specification. The polyhydroxy hyperbranched polymer provided by the invention is simple to obtain and simple to use, and can improve the bending strength of the dental epoxy resin and reduce the curing shrinkage rate of the dental epoxy resin.

Description

technical field [0001] The invention belongs to the field of polymer materials, and more specifically relates to a polyhydroxyl hyperbranched polymer, a preparation method of the polyhydroxyl hyperbranched polymer and its application in dental composite resins. Background technique [0002] Composite resin has gradually replaced silver amalgam because of its excellent color matching and good biocompatibility, and has become the most commonly used material in clinical tooth defect filling and restoration. Although the application of composite resin materials exhibits many excellent properties, there are still several unresolved problems, including large polymerization shrinkage, poor mechanical properties, and biological safety. Long-term clinical practice and investigations have shown that the clinical failure rate of composite resin restoration is still high, and the clinical service life is shorter than that of silver amalgam. This is mainly because the polymerization shr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00A61K6/00A61K6/087
CPCC08G83/005
Inventor 韩冰孟焱李效玉兴安孙倩男
Owner PEKING UNIV SCHOOL OF STOMATOLOGY
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