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    Process for the production of polyurethane foam resins
    2.
    发明授权
    Process for the production of polyurethane foam resins 失效
    聚氨酯泡沫树脂生产工艺

    公开(公告)号：US3793268A

    公开(公告)日：1974-02-19

    申请号：US3793268D

    申请日：1971-03-19

    Applicant: BAYER AG

    Inventor： DIETRICH W ,  MAABEN D ,  CONRAD H ,  UHLIG K ,  WAGNER K ,  BORMANN H ,  PIECHOTA H

    IPC: C08G18/48 ,  C08G18/78 ,  C08G18/80 ,  C08G22/18 ,  C08G22/46

    CPC classification number: C08G18/4804 ,  C08G18/4833 ,  C08G18/7831 ,  C08G18/8009 ,  C08G2101/0016 ,  C08G2101/0025 ,  C08G2101/0033 ,  C08G2101/005 ,  C08G2101/0058 ,  Y10S521/901 ,  Y10S521/902

    Abstract: A PROCESS FOR THE PRODUCTION OF POLYURETHANE FOAM RESINS FROM POLYISOCYANATES, POLYETHERS WHICH CONTAIN HYDROXYL GROUPS, WATER AND OPTIONALLY OTHER BLOWING AGENTS AND OPTIONALLY FLAME RETARDING AGENTS, EMULSIFIERS, ACTIVATORS AND OTHER ADDITIVES IS PROVIDED WHICH IS CHARACTERIZED IN THAT THE POLYISOCYANATES USED ARE 20% TO 85% SOLUTIONS IN LIQUID MONOMERIC POLYISOCYANATES(WHICH ARE FREE FROM URETHANE GROUPS OR BIURET GROUPS) OF URETHANE-CONTAINING POLYISOCYANATES HAVING MOLECULAR WEIGHTS OF ABOUT 410 TO 3000 OR OF BIURET-CONTAINING POLYISOCYANATES OF THE GENERAL FORMULA:

    OCN-R-N(-CO-N(-X)-R-NCO)2

    IN WHICH R REPRESENTS A DIVALENT ALIPHATIC, ARALIPHATIC, CYCLOALIPHATIC OR AROMATIC RADICAL AND X REPRESENTS HYDROGEN OR THE GROUP: X = -(CO-N(-R-NCO))N-H (N REPRESENTS AN INTEGER OF FROM 0 TO 5), AND THE POLYETHERS USED ARE MIXTURES OF POLYETHERS HAVING AN ALKYLENE OXIDE CONTENT OF FROM ABOUT 65% TO ABOUT 100% BY WEIGHT AND PREFERABLY 100% BY WEIGHT OF ETHYLENE OXIDE, THE POLYETHER MIXTURES CONTAINING FROM ABOUT 25% TO ABOUT 75% NBY WEIGHT, AND PREFERABLY 40% TO 60% BY WEIGHT OF DIFUNCTIONAL AND/OR TRIFUNCTIONAL POLYETHERS AND FROM ABOUT 75% TO ABOUT 25% BY WEIGHT, PREFERABLTY 60% TO 40% BY WEIGHT, OF POLYETHERS HAVING A FUNCTIONALITY OF 4 TO 8. THIS INVENTION ALSO CONTEMPLATES THE USE OF AN ADDITIONAL POLYISOCYANATE WHICH CONTAINS URETHANE GROUPS AND HAS AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 410 TO 3000 IN LIQUID MONOMERIC POLYISOCYANATES WHICH ARE FREE FROM BIURET GROUPS.

    4.
    发明专利
    未知

    公开(公告)号：SE366052B

    公开(公告)日：1974-04-08

    申请号：SE1708070

    申请日：1970-12-16

    Applicant: BAYER AG

    Inventor： RICHERT K ,  VON GIZYCKI U ,  MAASSEN D ,  DIETRICH W ,  CONRAD H ,  ZARNACK U

    IPC: C08G18/48 ,  C08G18/72 ,  C08G18/78 ,  C08G22/44

    Abstract: 1293237 Polyurethane foams FARBENFABRIKEN BAYER AG 13 Nov 1970 [17 Dec 1969] 54086/70 Headings C3C and C3R Polyurethane foams are prepared by reacting, in the presence of a blowing agent and a catalyst for the reaction, a hydroxyl-group containing polyether which contains at least 10% primary OH groups and has a M.W. of 3500 to 10,000 with a biuret-containing polyisocyanate dissolved in a monomeric polyisocyanate at a concentration of 1 to 85% by weight. The polyether is suitably prepared by reacting an alkylene oxide with a compound which contains reactive hydrogen atoms followed by reaction with ethylene oxide to introduce the primary hydroxyl groups. Other compounds having reactive hydrogen atoms may be used in admixture with the polyethers. The biuret containing polyisocyanates are prepared preferably by reacting a monomeric polyisocyanate with water or formic acid, and are then dissolved in monomeric polyisocyanates or are suitably prepared using excess monomeric polyisocyanate in which case the required mixture is produced in one-step. Solutions containing urethane-containing polyisocyanates or isocyanate-containing polyisocyanates as well as the biuret-containing polyisocyanate in monomeric polyisocyanates are particularly suitable. In a typical example a mixture is prepared from a propylene glycol/ trimethylolpropane/ethylene oxide polyether, ethylene glycol, monofluorotrichloromethane, 1 - dimethylaminoethyl - 4 - methylpiperazine and endoethylenepiperazine and is reacted in a closed mould with a biuret-containing polyisocyanate mixture prepared by reacting 2,4- and 2,6-toluylene diisocyanate with water.

    PROCESS FOR THE PRODUCTION OF SYNTHETIC PLASTICS COMPRISING URETHANE GROUPS AND BIURET GROUPS
    5.
    发明专利
    PROCESS FOR THE PRODUCTION OF SYNTHETIC PLASTICS COMPRISING URETHANE GROUPS AND BIURET GROUPS 未知

    公开(公告)号：ZA702699B

    公开(公告)日：1971-09-29

    申请号：ZA702699

    申请日：1970-04-22

    Applicant: BAYER AG

    Inventor： WAGNER K ,  CONRAD H ,  DIETRICH W ,  KRAFT K

    IPC: C08G18/72 ,  C08G18/78 ,  C08G

    Abstract: A process is provided for the production of synthetic polyurethane plastics, particularly foam plastics, containing biuret groups by reacting polyisocyanates, polyhydroxyl and/or polycarboxyl compounds, flame inhibitors and, if desired, blowing agents, emulsifiers, activators and other additives which is characterized by using as the polyisocyanate solutions in monomeric polyisocyanates of from about 1 per cent to 85 per cent of polyisocyanates containing biuret groups and having the formula: O PARALLEL OCN-R-N-C-N-R-NCO ¦¦ O=C(CO-N)nH ¦¦ R-NCO H--N-CO)n-N ¦¦ R-NCOR ¦ NCO in which R is an aromatic, araliphatic or cycloaliphatic radical which may, if desired, be substituted and N IS AN INTEGER FROM 0 TO 5, WHEREIN THE PROPORTION OF BIURET-POLYISOCYANATES HAVING MORE THAN THREE ISOCYANATE GROUPS IS AT LEAST 20 PER CENT BY WEIGHT BASED ON THE TOTAL QUANTITY OF BIURET-POLYISOCYANATES, AND THE SOLUTIONS CONTAIN FROM ABOUT 0.03 PER CENT TO ABOUT 5 PER CENT BY WEIGHT OF CHEMICALLY COMBINED EMULSIFIERS.

    8.
    发明专利
    未知

    公开(公告)号：SE365226B

    公开(公告)日：1974-03-18

    申请号：SE648670

    申请日：1970-05-12

    Applicant: BAYER AG

    Inventor： WAGNER K ,  DIETRICH W ,  KRAFT K ,  CONRAD H

    IPC: C08G18/72 ,  C08G18/78 ,  C08G22/04 ,  C08G22/44

    Abstract: A process is provided for the production of synthetic polyurethane plastics, particularly foam plastics, containing biuret groups by reacting polyisocyanates, polyhydroxyl and/or polycarboxyl compounds, flame inhibitors and, if desired, blowing agents, emulsifiers, activators and other additives which is characterized by using as the polyisocyanate solutions in monomeric polyisocyanates of from about 1 per cent to 85 per cent of polyisocyanates containing biuret groups and having the formula: O PARALLEL OCN-R-N-C-N-R-NCO ¦¦ O=C(CO-N)nH ¦¦ R-NCO H--N-CO)n-N ¦¦ R-NCOR ¦ NCO in which R is an aromatic, araliphatic or cycloaliphatic radical which may, if desired, be substituted and N IS AN INTEGER FROM 0 TO 5, WHEREIN THE PROPORTION OF BIURET-POLYISOCYANATES HAVING MORE THAN THREE ISOCYANATE GROUPS IS AT LEAST 20 PER CENT BY WEIGHT BASED ON THE TOTAL QUANTITY OF BIURET-POLYISOCYANATES, AND THE SOLUTIONS CONTAIN FROM ABOUT 0.03 PER CENT TO ABOUT 5 PER CENT BY WEIGHT OF CHEMICALLY COMBINED EMULSIFIERS.

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