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公开(公告)号：DE2167037A1
公开(公告)日：1977-09-29
申请号：DE2167037
申请日：1971-12-07
Applicant: BAYER AG
Inventor： BLAHAK JOHANNES DR , MUELLER ERWIN DR , DOEBEREINER UWE DR , EBNER WOLFGANG DR , KLEIMANN HELMUT DR
IPC: C08G18/38 , C07C101/68
Abstract: Polyurethane elastomers which can be moulded in high speed machines contain units of formula I: (where R is 1-20C alkyl which may be interrupted by O or S atoms; and R' is 1-10C alkyl). The polyurethanes are prepd. by reacting polyisocyanates, polyhydroxy cpds. with a mol. wt. of 800-5000, and diamines of formula II. In cpds. II, R is pref. methyl or t-butyl; and R' is n- or i-butyl or 3-ethyl-n-heptyl.
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公开(公告)号：DE2524834A1
公开(公告)日：1976-12-16
申请号：DE2524834
申请日：1975-06-04
Applicant: BAYER AG
Inventor： SCHNEIDER HEINZ GEORG DR , KLEIMANN HELMUT DR , LUCKAS BRUNO
Abstract: This invention relates to a process for the production of polyurethane foams in closed molds using mixtures of organic polyisocyanates with certain compounds which liberate carbon dioxide under the catalytic influence of basic compounds. In this process a mixture of polyisocyanates and compounds which liberate carbon dioxide under the catalytic influence of basic compounds is reacted with organic compounds containing hydrogen atoms which are reactive with isocyanate groups, which organic compounds are mixed with basic compounds and/or have basic compounds chemically built into them. The process is suitable for the production of any polyurethane foams in a closed mold, but is preferably applied to the production of semi-hard and particularly of hard polyurethane foams having a dense outer skin.
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公开(公告)号：DE2445648A1
公开(公告)日：1976-04-15
申请号：DE2445648
申请日：1974-09-25
Applicant: BAYER AG
Inventor： BONIN WULF VON DR , KLEIMANN HELMUT DR , LIENERT JUERGEN DR , KOSTER JOHANN DR
IPC: C08G77/388 , C08J9/00 , C08G18/14
Abstract: Moulded polyurethane foam materials are prepd. by expanding/moulding a mixt. of (I) polyisocyanates, (II) cpds. having reactive H atoms, and a mol. wt. of 62-10,000, (III) water and/or org. blowing agents, and (IV) a demoulding agent consisting of (a) salts of polysiloxanes contg. amino gps., and (b) fatty acids. IVa is pref. a methylpolysiloxane contg. amino groups and 5-80 Si atoms. IVb is pref. oleic acid, or a mixt. of technical fatty acids contg. this acid. Very easy demoulding of the foamed prod. The demoulding agent does not sink in the reaction mixt., and does not harm the properties of the prod. The moulding has a high quality surface free of cavities and other defects. The foam prod. can be flexible, rigid or semi-rigid.
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公开(公告)号：DE2319648A1
公开(公告)日：1974-11-14
申请号：DE2319648
申请日：1973-04-18
Applicant: BAYER AG
Abstract: A reaction product of a fatty acid ester and an organic monoisocyanate is included in a foamable reaction mixture containing an organic polyisocyanate to provide a molded product which can be removed from a mold whose surface has not been coated with conventional mold release agents.
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Patent Agency Ranking
公开(公告)号：CH513123A
公开(公告)日：1971-09-30
申请号：CH1244068
申请日：1968-08-19
Applicant: BAYER AG
Inventor： MARQUARDING DIETER DR , UGI IVAR DR , KLEIMANN HELMUT DR , HOFFMANN PETER DR
IPC: C07K1/02 , C07C103/30
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公开(公告)号：DE2862124D1
公开(公告)日：1983-01-20
申请号：DE2862124
申请日：1978-08-07
Applicant: BAYER AG
Inventor： KLEIMANN HELMUT DR , MEYBORG HOLGER DR , LIENERT HANS-JURGEN DR , GROGLER GERHARD DR
Abstract: The instant invention is directed to a process for the production of weather-resistant rigid molded foams based on polyurethanes having a dimensional stability under heat according to DIN 53 432 of at least 70 DEG C. and a compact surface, a cellular core and an integral density distribution throughout the cross-section of the moldings, comprising foaming a foamable reaction mixture of polyisocyanates, polyhydroxyl compounds, blowing agents and, optionally, other isocyanate-reactive compounds, activators and other auxiliaries in a closed mold under the conditions of in-mold foaming, the improvement wherein the polyisocyanates used are reaction products containing isocyanate groups and urethane groups, said reaction products formed by reacting diisocyanates containing at least one cycloaliphatically bound isocyanate group and no more than one aliphatically bound isocyanate group with sub-stoichiometric quantities of organic polyhydroxyl compounds.
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公开(公告)号：DE3003543A1
公开(公告)日：1981-08-06
申请号：DE3003543
申请日：1980-01-31
Applicant: BAYER AG
Inventor： BONIN WULF VON DR , KLEIMANN HELMUT DR , FREITAG HANS-ALBRECHT DR
IPC: C07D251/34 , C07C67/00 , C07C239/00 , C07C273/18 , C07C275/00 , C07D295/13 , C08G18/00 , C08G18/32 , C08G18/78 , C08G18/80 , C07C127/19
Abstract: A process for preparing modified polyisocyanates in which an organic polyisocyanate is reacted with a polyamine present in less than stoichiometric amount. Polyamines suitable to this process include (a) polyamines having more than three nonaromatically bound, basic nitrogen atoms of which at least two are primary and/or secondary amino nitrogen atoms, and (b) polyamine mixtures having an average of more than three nonaromatically bound, basic nitrogen atoms of which at least two are primary and/or secondary amino nitrogen atoms. These modified polyisocyanates are particularly useful starting materials for production of polyurethane plastics by the isocyanate-polyaddition process.
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公开(公告)号：DE2812256A1
公开(公告)日：1979-10-04
申请号：DE2812256
申请日：1978-03-21
Applicant: BAYER AG
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公开(公告)号：DE2363452A1
公开(公告)日：1975-06-26
申请号：DE2363452
申请日：1973-12-20
Applicant: BAYER AG
Inventor： BONIN WULF VON DR , KLEIMANN HELMUT DR , POST UDO
IPC: C09J7/02 , B29C33/00 , B29C39/00 , B29C39/02 , B29C39/38 , B29C59/00 , C08G18/00 , C08J9/00 , C08L83/06 , C10M107/50 , C10M109/02 , C10N40/36 , C08G18/14
Abstract: The mold release properties of a molded polyurethane foam are improved by including in the foamable reaction mixture to be molded a reaction product of a polysiloxane and a monocarboxylic acid or polycarboxylic acid.
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