31.
    发明专利
    未知

    公开(公告)号:ES2178340T3

    公开(公告)日:2002-12-16

    申请号:ES99125086

    申请日:1999-12-16

    Applicant: BASF AG

    Abstract: Low-fogging catalysts for polyurethane (PU) production, obtained by reacting (a) polymeric compounds containing carboxylic acid and/or anhydride groups with (b) compounds with primary or secondary amino group(s) and/or compounds with tertiary amino group(s) and group(s) which react with acid or anhydride groups. Independent claims are also included for: (i) A process as described above for the production of low-fogging catalysts; (ii) a process for the production of PU by reacting polyisocyanates with compounds containing at least two isocyanate-reactive groups in presence of these catalysts; (iii) polyurethanes obtained by this process.

    33.
    发明专利
    未知

    公开(公告)号:DE19745613A1

    公开(公告)日:1999-04-22

    申请号:DE19745613

    申请日:1997-10-15

    Applicant: BASF AG

    Abstract: Polyurethane synthesis composition using a polymeric emulsifier having a backbone consisting of a copolymer of 4-12C unsaturated dicarboxylic acid or anhydrides and 2-40C olefins, with polyoxyalkylene side chains derived from 2-20C oxiranes. A polyurethane (PU) synthesis composition containing, as emulsifier, a polymer (T) with (at least) a copolymer backbone (TR) derived from 4-12 carbon(C) unsaturated dicarboxylic acid(s) and/or their anhydrides (TR1) and 2-40 C olefin(s) (TR2), and having polyalkylene oxide side chain (TP) derived from 2-20 C oxirane(s) (TP1), together with at least two compounds (a) comprising at least two reactive hydrogen atoms, at least one of which is insoluble. Independent claims are also included for: (a) a process for the production of synthesis composition by contacting the components in presence of a polymer; (b) a PU synthesis composition obtained; (c) a polyurethane obtained by bringing the synthesis composition into contact with a polyisocyanate; and (d) moldings, fibers, coatings, paint, sheets and a foam made from the PU compositions.

    35.
    发明专利
    未知

    公开(公告)号:AT161859T

    公开(公告)日:1998-01-15

    申请号:AT92117083

    申请日:1992-10-07

    Applicant: BASF AG

    Abstract: The invention relates to transparent, autoclavable, non-cytotoxic, essentially compact polyurethane embedding compositions which are prepared by reacting a) modified diphenylmethane diisocyanates with b) compounds with at least two reactive hydrogens, which contain or are composed of b1) at least one polyether-polyol with an average functionality of from 3 to 8, a hydroxyl number of from 200 to 1000 and an alkali metal ion content of from 150 to 1200 ppm or, preferably, a mixture of (b1) and castor oil and/or at least one polyetherpolyol (b2) with a functionality of from 2 to 3, a hydroxyl number of from 90 to 200 and an alkali metal ion content of less than 10 ppm in the presence or absence of c) catalysts and to a process for preparing the polyurethane embedding compositions and to the use thereof for articles used in medicine.

    36.
    发明专利
    未知

    公开(公告)号:AT161559T

    公开(公告)日:1998-01-15

    申请号:AT94106805

    申请日:1994-05-02

    Applicant: BASF AG

    Abstract: The invention relates to a process for the production of polyurethane foams, preferably semirigid polyurethane foams, having an improved foam structure by reacting a) organic and/or modified organic polyisocyanates with b) polyhydroxyl compounds having at least 2 reactive hydrogen atoms and c) crosslinking agents comprising at least one polyoxyalkylene polyol having a mean functionality of 3 to 8 and a hydroxyl number of from 200 to 1300 ppm, and having an alkali ion content of from 150 to 1200 ppm, in the presence of d) blowing agents, e) optionally catalysts, f) inorganic and/or organic acids as additive and g) optionally auxiliaries.

    37.
    发明专利
    未知

    公开(公告)号:DE59108711D1

    公开(公告)日:1997-06-26

    申请号:DE59108711

    申请日:1991-10-15

    Applicant: BASF AG

    Abstract: The invention relates to a process for the production of soft-elastic mouldings which contain urethane groups and are free from chlorofluorocarbons (CFCs), and have 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) crystalline, microporous molecular sieves having a cavity diameter and cavity entrance aperture of less than 1.3 nm, comprising metal oxides or metal phosphates and optionally further additives, and g) assistants, in a closed mould with compaction, expediently by reaction injection moulding (RIM).

    39.
    发明专利
    未知

    公开(公告)号:DK0513573T3

    公开(公告)日:1996-11-18

    申请号:DK92106987

    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

    40.
    发明专利
    未知

    公开(公告)号:AT132881T

    公开(公告)日:1996-01-15

    申请号:AT89110559

    申请日:1989-06-10

    Applicant: BASF AG

    Abstract: The invention relates to polyurethane mouldings which are provided with a contoured, multilayer film and comprise a) a top layer of paint, b) a middle layer of a urethane- and/or urea-containing film, produced from a thermocurable mixture which has a long shelf life at room temperature, and c) a rear layer of a compact or cellular polyurethane, which may optionally contain inserts and/or reinforcing material, and to a process for the production of the polyurethane mouldings according to the invention and to their use.

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