Melt tension improver for polyolefin resins and process for producing the same

a technology of polyolefin resin and melt tension, which is applied in the direction of emulsion paints, coatings, etc., can solve the problems of lower rigidity of the resulting blend, inferior vacuum moldability, foam moldability, etc., and achieve the effect of improving the molding processability of polyolefins and improving the dispersibility of polytetrafluoroethylen
US20010016627A1Inactive Publication Date: 2001-08-23MITSUBISHI CHEM CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
MITSUBISHI CHEM CORP
Publication Date
2001-08-23
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

A melt tension enhancer for polyolefin resins that contains polytetrafluoroethylene and a polymer of an alkyl (meth)acrylate of 5-30 carbon atoms, and a process for its production. Its addition to polyolefin resins enhances the melt tension of the polyolefin resins without impairing the surface appearance of their molds.
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Description

[0001] The present invention relates to a melt tension enhancer for polyolefin resins that contains (A) polytetrafluoroethylene and (B) a polymer based on an alkyl (meth)acrylate of 5-30 carbon atoms, and to a process for its production.

[0002] Polyolefin resins have been widely used in the past for a variety of molded products because of their low cost and excellent physical properties. However, because of low tension upon melting (hereunder referred to as "melt tension") in the case of polypropylene, for example, there are some disadvantages in terms of processability, including inferior vacuum moldability, blow moldability, foam moldability, extrusion moldability and calender moldability.

[0003] Polyethylene and the like are often blended with polypropylene toward the aim of improving these processability, but since the improvement in processability is insufficient, large amounts of polyethylene are required and this leads to the disadvantage of lower rigidity of the resulting blen...

Claims

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