Method for producing foamed article from polypropylene专利检索-电离辐射物理专利检索查询-专利查询网

Method for producing foamed article from polypropylene

阅读：865发布：2023-03-28

专利汇可以提供Method for producing foamed article from polypropylene专利检索，专利查询，专利分析的服务。并且A method of producing a foamed article having a uniform cellular structure using a modified polypropylene produced by irradiating polypropylene with an ionizing radiation of from 0.1 to 5.0 megarad and graft-copolymerizing the irradiated polypropylene with from 0.5 - 6 percent by weight divinyl benzene or with from 0.5 - 6 percent by weight of divinyl benzene and not more than 10 percent by weight of an acrylic acid ester.，下面是Method for producing foamed article from polypropylene专利的具体信息内容。

权利要求

1. A process of producing a foamed product consisting essentially of irradiating polypropylene having a specific gravity of about 0.91 and a melt index of about 3.6 with an ionizing radiation of from 0.1 to 5.0 megarad, then graft-copolymerizing the resulting irradiated polypropylene with from 0.5 to 6% by weight divinyl benzene, forming a mixture of the resulting modified graft-co-polymerized polypropylene with a foaming agent having a decomposition point higher than the melting point of said modified graft-copolymerized polypropylene and then heating said mixture in a mold.

2. The foamed product produced by the process according to claim 1.

3. The process according to claim 1, wherein said foaming agent is a member selected from the group consisting of azobis carbonamide and N, N''-dinitrosopentamethylene tetramine.

4. A process of producing a foamed product consisting essentially of irradiating polypropylene having a specific gravity of about 0.91 and a melt index of about 3.6 with an ionizing radiation of from 0.1 to 5.0 megarad, then graft-copolymerizing the resulting irradiated polypropylene with from 0.5 to 6 percent by weight divinyl benzene and from 0.5 to 4 percent by weight of an acrylic acid ester, forming a mixture of the modified graft-copolymerized polypropylene with a foaming agent having a decomposition point higher than the melting point of said modified graft-copolymerized polypropylene and then heating said mixture in a mold.

5. The foamed product produced by the process according to claim 4.

6. The process according to claim 4, wherein said foaming agent is a member selected from the group consisting of azobis carbonamide and N, N''-dinitrosopenatamethylene tetramine.

7. A process of producing a foamed product consisting essentially of irradiating polypropylene having a specific gravity of about 0.91 and a melt index of about 3.6 with an ionizing radiation of from 0.1 to 5.0 megarad at a temperature of from -20* to -40*C, then graft-copolymerizing the resulting irradiated polypropylene with from 1 to 3 percent by weight divinyl benzene and from 0.5 to 4 percent by weight of an acrylic acid ester at a temperature of from 30* to 40*C in a solution of said divinyl benzene and said acrylic acid ester, forming a mixture of the resulting modified graft-copolymerized polypropylene with a foaming agent selected from the group consisting of azobis carbonamide and N, N''-dinitrosopentamethylene tetramine and then heating said mixture in a mold. 7.

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