21.
    发明专利
    未知

    公开(公告)号:ES2093136T3

    公开(公告)日:1996-12-16

    申请号:ES92106987

    申请日:1992-04-24

    Applicant: BASF AG

    Abstract: The invention relates to a process for the preparation of CFC-free, soft and elastic, semi-rigid or rigid mouldings containing urethane groups and having a cellular core and a compacted peripheral zone with an essentially pore-free, smooth surface, by reacting a) organic and/or modified organic polyisocyanates with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms and optionally c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of d) blowing agents, e) catalysts, f) at least one amorphous, microporous silica gel which preferably has a mean pore diameter with more than 40 % in range from 0.1 to 10 nm, a pore volume of from 0.15 to 1.8 ml/g and a BET surface area of from 200 to 900 m /g, and optionally further additives, and g) assistants, in a closed mould with compaction. t

    23.
    发明专利
    未知

    公开(公告)号:DK0545175T3

    公开(公告)日:1996-11-18

    申请号:DK92119790

    申请日:1992-11-20

    Applicant: BASF AG

    Abstract: The invention relates to a process for the preparation of chlorofluorocarbon-free (CFC-free), elastomeric, semi-rigid or rigid mouldings containing urethane groups or urethane and urea groups and having a cellular core and a compacted peripheral zone with an essentially pore-free, smooth surface, by reacting a) organic and/or modified organic polyisocyanates with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms and optionally c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of d) blowing agents, e) catalysts, f) at least one microporous activated charcoal and/or a microporous carbon molecular sieve, which preferably has a mean pore diameter with more than 40% in the range from 0.3 to 3 nm, a pore volume of from 0.20 to 1.4 ml/g and a BET surface area of from 500 to 2500 m /g or greater, and optionally further additives and g) auxiliaries, in a closed mould with compaction.

    24.
    发明专利
    未知

    公开(公告)号:ES2090463T3

    公开(公告)日:1996-10-16

    申请号:ES92119790

    申请日:1992-11-20

    Applicant: BASF AG

    Abstract: The invention relates to a process for the preparation of chlorofluorocarbon-free (CFC-free), elastomeric, semi-rigid or rigid mouldings containing urethane groups or urethane and urea groups and having a cellular core and a compacted peripheral zone with an essentially pore-free, smooth surface, by reacting a) organic and/or modified organic polyisocyanates with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms and optionally c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of d) blowing agents, e) catalysts, f) at least one microporous activated charcoal and/or a microporous carbon molecular sieve, which preferably has a mean pore diameter with more than 40% in the range from 0.3 to 3 nm, a pore volume of from 0.20 to 1.4 ml/g and a BET surface area of from 500 to 2500 m /g or greater, and optionally further additives and g) auxiliaries, in a closed mould with compaction.

    25.
    发明专利
    未知

    公开(公告)号:DE4139520A1

    公开(公告)日:1993-06-03

    申请号:DE4139520

    申请日:1991-11-30

    Applicant: BASF AG

    Abstract: The invention relates to a process for the preparation of chlorofluorocarbon-free (CFC-free), elastomeric, semi-rigid or rigid mouldings containing urethane groups or urethane and urea groups and having a cellular core and a compacted peripheral zone with an essentially pore-free, smooth surface, by reacting a) organic and/or modified organic polyisocyanates with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms and optionally c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of d) blowing agents, e) catalysts, f) at least one microporous activated charcoal and/or a microporous carbon molecular sieve, which preferably has a mean pore diameter with more than 40% in the range from 0.3 to 3 nm, a pore volume of from 0.20 to 1.4 ml/g and a BET surface area of from 500 to 2500 m /g or greater, and optionally further additives and g) auxiliaries, in a closed mould with compaction.

    27.
    发明专利
    未知

    公开(公告)号:DE19942616A1

    公开(公告)日:2001-03-15

    申请号:DE19942616

    申请日:1999-09-08

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing skins from polyurethane dispersions, comprising the following steps: 1) two-dimensionally coating the surface of a substrate or the surface of a film covering the substrate by simultaneously spraying an aqueous dispersion containing a polyurethane (polyurethane A) with ionic groups and an ionic or potentially ionic precipitating agent (precipitating agent F) in liquid form onto the surface of the substrate or the surface of the film covering the substrate, so that a covering is formed; and 2) removing the covering, or if the surface of the substrate was covered by a film, the composite structure consisting of the covering and the film, from the substrate.

    29.
    发明专利
    未知

    公开(公告)号:DE59207363D1

    公开(公告)日:1996-11-21

    申请号:DE59207363

    申请日:1992-04-24

    Applicant: BASF AG

    Abstract: The invention relates to a process for the preparation of CFC-free, soft and elastic, semi-rigid or rigid mouldings containing urethane groups and having a cellular core and a compacted peripheral zone with an essentially pore-free, smooth surface, by reacting a) organic and/or modified organic polyisocyanates with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms and optionally c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of d) blowing agents, e) catalysts, f) at least one amorphous, microporous silica gel which preferably has a mean pore diameter with more than 40 % in range from 0.1 to 10 nm, a pore volume of from 0.15 to 1.8 ml/g and a BET surface area of from 200 to 900 m /g, and optionally further additives, and g) assistants, in a closed mould with compaction. t

    30.
    发明专利
    未知

    公开(公告)号:DE59206854D1

    公开(公告)日:1996-09-05

    申请号:DE59206854

    申请日:1992-11-20

    Applicant: BASF AG

    Abstract: The invention relates to a process for the preparation of chlorofluorocarbon-free (CFC-free), elastomeric, semi-rigid or rigid mouldings containing urethane groups or urethane and urea groups and having a cellular core and a compacted peripheral zone with an essentially pore-free, smooth surface, by reacting a) organic and/or modified organic polyisocyanates with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms and optionally c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of d) blowing agents, e) catalysts, f) at least one microporous activated charcoal and/or a microporous carbon molecular sieve, which preferably has a mean pore diameter with more than 40% in the range from 0.3 to 3 nm, a pore volume of from 0.20 to 1.4 ml/g and a BET surface area of from 500 to 2500 m /g or greater, and optionally further additives and g) auxiliaries, in a closed mould with compaction.

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