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Document Type and Number:
WIPO Patent Application WO/2019/024870
Kind Code:
The present invention relates to a micro-particle-size thermoplastic micro-airbag polyurethane elastomer material and preparation therefor, the material formula comprising the following ingredients in percentage by weight: 1%-97% of a support skeleton polymer material, 1%-97% of a pressure-proof slow-springback polymer material, 0.01%-0.5% of a nucleating agent and 0.1%-10% of a foaming agent. The material is prepared by means of the following method: (1) feeding the polyurethane raw material and the nucleating agent from a feeding opening in the front end of a twin-screw extruder, feeding the foaming agent from a feeding opening in a middle section, carrying out hot melting on the raw materials, adequately mixing, putting the raw materials into a static mixer, carrying out further homogenization, and carrying out pressure control and quantitative conveying by means of a melt pump; and (2) introducing a hot melt sent out by the melt pump into an underwater particle dicing chamber by means of a mold head, carrying out particle dicing, bringing out particles using processing water for separation, and sieving and drying the obtained particles so as to obtain a target product. Compared to existing technology, the product of the present invention has a winding network air way interpenetration structure formed by an apropriate micro-airbag structure and a suitable opening foam hole, and the particle sizes may be effectively controlled to be at about 0.5mm-2mm.

CHEN, Qiaojian (Room 101, 5th Building 169 Bailan Road, Shanghai 2, 200062, CN)
GUO, Yanglong (Room 101, 5th Building 169 Bailan Road, Shanghai 2, 200062, CN)
Application Number:
Publication Date:
February 07, 2019
Filing Date:
August 01, 2018
Export Citation:
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NANTONG DE NEW MATERIAL CO., LTD. (No. 14-15, Village South Town Chaiwan Town, Rugao Cit, Nantong Jiangsu 8, 226578, CN)
International Classes:
C08L75/08; B29B9/06; C08J9/12; C08K3/04; C08K3/26; C08K3/34; C08K7/24; C08L27/18; C08L75/06
Attorney, Agent or Firm:
SHANGHAI KESHENG INTELLECTUAL PROPERTY AGENCY LTD. (Unit 18F, Cross Region PlazaNo.899 Lingling Road, Xuhui District, Shanghai 0, 200030, CN)
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