Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Showa Denko Materials Co ltd
Original Assignee
Hitachi Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP9016778Aexternal-prioritypatent/JPS5516069A/en
Priority claimed from JP9016578Aexternal-prioritypatent/JPS5516067A/en
Priority claimed from JP53097017Aexternal-prioritypatent/JPS5825370B2/en
Application filed by Hitachi Chemical Co LtdfiledCriticalHitachi Chemical Co Ltd
Publication of ES482626A1publicationCriticalpatent/ES482626A1/en
Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products
(AREA)
Abstract
1. A process for obtaining a polyolefin resin foam, comprising the steps of dispersing a blowing agent composition comprising (a) azodicarbonamide, (b) dinitrosopentamethylene-tetramine, and (c) a phenolic antioxidant, or (b) ) hexamethylenetetramine in place of said components (b) and (c), in a polyolefin resin to form an expandable resin preform; introduce a crosslinking structure into it; and expanding said preform by heating at normal pressure, either after introducing the crosslinking structure into said preform, or in the course of introducing the crosslinking structure therein. (Machine-translation by Google Translate, not legally binding)
ES482626A1978-07-241979-07-19A procedure for obtaining a polyolefine resin foam. (Machine-translation by Google Translate, not legally binding)
ExpiredES482626A1
(en)