Rim process using liquid methylene diphenyl diisocyanate
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08G-018/08
C08G-018/10
출원번호
US-0484618
(1995-06-07)
발명자
/ 주소
Slack William E. (Moundsville WV) Kemp
II Hersel T. (New Martinsville WV) Steppan David D. (Gibsonia PA)
출원인 / 주소
Bayer Corporation (Pittsburgh PA 02)
인용정보
피인용 횟수 :
10인용 특허 :
15
초록▼
The present invention relates to a process for the production of molded articles via the reaction injection molding technique. According to the RIM process, a reaction mixture is introduced into a closed mold, allowed to react fully, and removed from the mold. More specifically, these reaction mixtu
The present invention relates to a process for the production of molded articles via the reaction injection molding technique. According to the RIM process, a reaction mixture is introduced into a closed mold, allowed to react fully, and removed from the mold. More specifically, these reaction mixtures comprise an isocyanate-reactive material, a chain extender, and a stable, liquid diallophanate modified diphenylmethane diisocyanate (MDI). Two specific processes for the preparation of the suitable diallophanate modified diisocyanate are disclosed. These diallophanate modified isocyanates either have an isocyanate group content from about 12 to 30%, or from about 5 to 29%.
대표청구항▼
A process for producing a molded article via the reaction injection molding (RIM) technique by introducing a reaction mixture into a closed mold, wherein said reaction mixture has an isocyanate index of from about 80 to 120 and said reaction mixture comprises: A) an isocyanate-reactive material, B)
A process for producing a molded article via the reaction injection molding (RIM) technique by introducing a reaction mixture into a closed mold, wherein said reaction mixture has an isocyanate index of from about 80 to 120 and said reaction mixture comprises: A) an isocyanate-reactive material, B) a chain extender, and C) a stable, liquid diallophanate-modified diphenylmethane diisocyanate prepared by either: 1) (a) reacting (i) one equivalent of a diisocyanate, with (ii) one equivalent of an aliphatic alcohol containing 1 to 36 carbon atoms or aromatic alcohol containing 6 to 18 carbon atoms wherein the hydroxyl group is directly attached to the aromatic ring to form a diurethane of the diisocyanate, (b) reacting said diurethane with a diphenylmethane diisocyanate isomer composition comprising about 0 to 60% by weight of 2,4′-diphenylmethane diisocyanate and less than 6% by weight of 2,2′-diphenylmethane diisocyanate with the remainder being 4,4′-diphenylmethane diisocyanate, in the presence of an allophanate catalyst to yield said stable, liquid diallophanate-modified diphenylmethane diisocyanate, followed by the addition of a catalyst stopper, wherein said stable, liquid diallophanate-modified diphenylmethane diisocyanate has an isocyanate group content of from 12.0 to 30.0%; or (a) reacting (i) one equivalent of a diisocyanate, with (ii) one equivalent of an aliphatic alcohol containing 1 to 36 carbon atoms or aromatic alcohol containing 6 to 18 carbon atoms to form a diurethane of the diisocyanate, (b) reacting said diurethane with a diphenylmethane diisocyanate isomer composition comprises about 0 to 60% by weight of 2,4′-diphenylmethane diisocyanate and less than 6% by weight of 2,2′-diphenylmethane diisocyanate with the remainder being 4,4′-diphenylmethane diisocyanate, in the presence of an allophanate catalyst to yield a diallophanate-modified diphenylmethane diisocyanate having an isocyanate group content of from 12.0 to 30%, followed by the addition of a catalyst stopper, and (c) reacting said diallophanate-modified diphenylmethane diisocyanate having an isocyanate group content of from 12.0 to 30.0%, with at least one compound selected from the group consisting of: (i) an organic material containing about 1.8 or more hydroxy, primary amine or secondary amine groups or any combination thereof, having a molecular weight of from 400 to 6000, (ii) a diol having a molecular weight of from 60 to 200 and (iii) mixtures of (i) and (ii), to form said stable, liquid diallophanate modified isocyanate wherein said diallophanate-modified isocyanate has an isocyanate group content of from 5 to 29%; allowing said reaction mixture to fully react, and removing the molded article from the mold.
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이 특허에 인용된 특허 (15)
Slack William E. (Moundsville WV) Kemp ; II Hersel T. (New Martinsville WV), Liquid diphenylmethane diisocyanate.
Cassidy Edward F. (Ukkel BEX) Gillis Herbert R. (Sterrebeek BEX) Leenslag Jan W. (Neerijse BEX) Parfondry Alain (Evere BEX), Polyisocyanate compositions.
Koenig Kalus (Leverkusen DEX) Reichmann Wolfgang (Dusseldorf DEX) Pedain Josef (Cologne DEX), Process for the preparation of allophanates which contain isocyanate groups.
Clatty Jan L. R. (Monaca PA) Wellman Michael T. (Moundsville WV) Madan Sanjeev (Coraopolis PA), Storage stable isocyanate-reactive compositions for use in flame-retardent systems.
Carleton Peter S. (Branford CT) Ewen ; Jr. James H. (New Haven CT) Reymore ; Jr. Harold E. (Wallingford CT), Storage-stable liquid polyisocyanate composition.
Super, Michael S.; Steppan, David D.; Slack, William E.; Potts, Bruce H.; Hurley, Michael F., High performance RIM elastomers and a process for their production.
Slack,William E.; Kemp, II,Hersel T.; Miller,William E., Polymeric allophanates of diphenylmethane diisocyanate, perpolymers of these polymeric allophanates, and processes for the preparation of the polymeric allophanates and the prepolymers thereof.
Slack, William E.; Kemp, II, Hersel T.; Miller, William E., Polymeric allophanates of diphenylmethane diisocyanate, prepolymers of these polymeric allophanates, and processes for the preparation of the polymeric allophanates and the prepolymers thereof.
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