发明授权
- 专利标题: Process for the production of elastic molded articles
- 专利标题(中): 用于生产弹性模制品的方法
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申请号: US443414申请日: 1982-11-22
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公开(公告)号: US4774263A公开(公告)日: 1988-09-27
- 发明人: Christian Weber , Hans Wirtz , Klaus Seel
- 申请人: Christian Weber , Hans Wirtz , Klaus Seel
- 申请人地址: DEX Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DEX Leverkusen
- 优先权: DEX3147736 19811202
- 主分类号: C08G18/00
- IPC分类号: C08G18/00 ; C08G18/50 ; C08G18/65 ; C08G18/66 ; C08G18/14
摘要:
Elastic molded articles having a closed surface layer are made from polyurea elastomers by the reaction injection molding technique. These polyurea elastomers are prepared from a polyisocyanate in which all of the isocyanate groups are aromatically bound, a polyether and a diamine. The polyether has at least two isocyanate-reactive groups and a molecular weight from 1800 to 12,000. At least 50% of the isocyanate-reactive groups in the polyether are pjrimary and/or secondary amino groups. The diamine has a molecular weight from 108 to 400 and primary and/or secondary aromatically bound amino groups. Known auxiliary agents and additives may also be employed.