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Method of SMC molding

A molding and plastic film technology, applied in the field of molding mixtures, which can solve the problems of short storage period, increased labor and waste disposal, and tight transportation of sheet molding mixtures

Inactive Publication Date: 2006-02-08
DOW GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even after curing, the shelf life of many conventional sheet molding compounds is generally relatively short, which necessitates rapid prototyping of such molding compounds into parts or assemblies
Furthermore, the relatively short storage period puts strain on the transport of sheet molding compounds
Furthermore, conventional sheet molding compounds are often supplied with one or more layers of release film that must be removed before the compound can be molded, and such removed film is typically discarded, thus increasing labor and waste disposal issues

Method used

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  • Method of SMC molding
  • Method of SMC molding

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Embodiment Construction

[0008] The invention presupposes the formation of a molding compound. This molding compound has been found to be particularly suitable for use as sheet molding compound. Although often referred to herein as a sheet molding compound, it should be understood that the present invention is not limited to sheet molding compounds, and that other molding compounds such as precast molding compounds, bulk molding compounds, or similar molding compounds may also be used. consider.

[0009] The molding compound preferably includes one or more of the following:

[0010] (a) at least one macrocyclic ester oligomer;

[0011] (b) at least one molding compound catalyst;

[0012] (c) at least one ingredient selected from reinforcing materials, fillers, or combinations thereof.

[0013] In another preferred embodiment, the molding compound further includes one or more other ingredients to adjust the properties of the material to meet specific applications.

[0014] Although the sheet moldi...

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Abstract

There is disclosed a molding compound. The molding compound preferably includes a macrocyclic oligoester that reacts with itself, a secondary compound or another macrocyclic oligoester during molding of the molding compound. Exemplary secondary compounds include a cyclic ester, a dihydroxyl-functionalized polymer or the like.

Description

[0001] Application Filing Date Priority Claim [0002] This application claims the benefit of the filing date of U.S. Provisional Application Serial No. 60 / 436,295, filed December 23, 2002, and the filing date of the concurrently filed U.S. Application Serial No. (Attorney Docket No. 62806A(1062-023)), both of which All are listed here as references. technical field [0003] The present invention relates to molding compounds, such as sheet molding compounds and the like. Background technique [0004] For many years, the industry has been seeking to design improved molding compounds, especially sheet molding compounds, since such molding compounds can be used in many fields. Typically, sheet molding compounds include components such as polyester resins, fillers, reinforcements, and other ingredients. The sheet molding mixture may also include one or more other reagents, such as reactive monomers, crosslinkers, copolymerization reagents or initiators. Additionally, some she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/18B29C70/46B29C67/24B29K67/00
Inventor J·E·肯德尔G·C·雷克斯R·L·西特斯D·H·班克R·P·戴恩
Owner DOW GLOBAL TECH LLC