13.
    发明专利
    未知

    公开(公告)号:DE19618392A1

    公开(公告)日:1997-11-13

    申请号:DE19618392

    申请日:1996-05-08

    Applicant: BASF AG

    Abstract: A process for the production of elastic polyurethane mouldings with compact surfaces and cellular cores by reacting a) modified organic polyisocyanates with b) at least one compound with at least two reactive hydrogen atoms and possibly c) chain-lengthening agents in the presence of d) blowing agents, e) catalysts and possibly f) conventional auxiliaries and/or additives, in a closed mould under compression, in which at least one reaction product of pure MDI and at least one polyether alcohol (polyoxyalkylene polyol) with an NCO content of

    14.
    发明专利
    未知

    公开(公告)号:DK0523398T3

    公开(公告)日:1996-12-30

    申请号:DK92110451

    申请日:1992-06-20

    Applicant: BASF AG

    Inventor: VOLKERT OTTO DR

    Abstract: The invention relates to a process for the preparation of rigid foams containing urethane groups or urethane and isocyanurate groups, 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 and optionally f) assistants and/or additives, where the blowing agent (d) used is at least one vinylfluoroalkane of the formula CH2=CH-CnF2n+1 in which n is an integer from 1 to 6 (di), or mixtures of at least one such vinylfluoroalkane (di) and at least one further physical and/or chemical blowing agent (dii) which is different from (di), and to blowing agent-containing emulsions which contain at least one vinylfluoroalkane and at least one formative component (a), (b), (c) or (b) and (c).

    15.
    发明专利
    未知

    公开(公告)号:DE19519335A1

    公开(公告)日:1996-11-28

    申请号:DE19519335

    申请日:1995-05-26

    Applicant: BASF AG

    Abstract: A process for producing moldings containing ester and urethane groups and having a cellular core and a compacted surface zone, preferably shoe soles, comprises reacting a) isocyanate semiprepolymers containing ester groups and having an isocyanate content of from 10 to 26% by weight, which in turn are prepared by reacting ai) 4,4'-MDI or mixtures of 4,4'-MDI and modified or unmodified MDI isomers, with aii) difunctional to trifunctional polyester polyols having molecular weights of from 600 to 3000 and aiii) at least one branched-chain dihydroxy compound containing at least one bonded ester unit as bridge and having a molecular weight of up to 500, with b) at least one relatively high molecular weight polyhydroxyl compound and, if desired, c) low molecular weight chain extenders and/or crosslinkers in the presence of d) blowing agents, e) catalysts and, if desired, f) additives in a closed mold with compaction. The isocyanate semiprepolymers containing ester groups which can be used in this process are liquid at room temperature.

    16.
    发明专利
    未知

    公开(公告)号:DE59010045D1

    公开(公告)日:1996-02-22

    申请号:DE59010045

    申请日:1990-09-27

    Applicant: BASF AG

    Inventor: VOLKERT OTTO DR

    Abstract: The invention relates to a process for preparation of rigid polyurethane foams having low thermal conductivity by reacting …… a) organic and/or modified organic polyisocyanates with … b) at least one relatively high molecular weight compound having at least two reactive hydrogen atoms and optionally … c) low molecular weight chain extenders and/or crosslinking agents in the presence of … d) cyclopentane (d1) or mixtures (d2) which contain: …… d2i) cyclopentane and/or cyclohexane and … d2ii) at least one compound which is homogeneously miscible with cyclopentane and/or cyclohexane and preferably has a boiling point below 35 DEG C, selected from the group consisting of the alkanes, cycloalkanes having not more than 4 carbon atoms, dialkyl ethers, cycloalkylene ethers and fluoroalkanes,… optionally in conjunction with water, as blowing agents (d), …… e) catalysts and optionally … f) auxiliaries and/or additives. …… The rigid polyurethane foams are used in the refrigerator industry and as insulating material in heating and composite elements.

    19.
    发明专利
    未知

    公开(公告)号:DE3903538A1

    公开(公告)日:1990-08-16

    申请号:DE3903538

    申请日:1989-02-07

    Applicant: BASF AG

    Abstract: Emulsifier-free aqueous polyurethane dispersions are prepared by reacting (a) dihydroxy compounds, (b) diisocyanates and (c) chain extenders to give a prepolymer having terminal isocyanate groups, then reacting the prepolymer with (d) salts of aliphatic aminocarboxylic or -sulfonic acids or amino-containing or hydroxyl-containing tertiary ammonium salts, dispersing the resulting polyurethane in water and, if required, removing the organic solvent by distillation. In the process, an organic condensation resin which is dissolved in a solvent is admixed before the polyurethane obtained is dispersed in water.

    Mouldable semifinished materials
    20.
    发明专利

    公开(公告)号:DE3424537A1

    公开(公告)日:1986-01-09

    申请号:DE3424537

    申请日:1984-07-04

    Applicant: BASF AG

    Abstract: Mouldable semifinished materials, containing A. unsaturated polyesters, B. monomers, C. optionally organic polymers, D. fibrous reinforcing agents, E. fillers, F. optionally thickeners, G. organic peroxides, I. optionally further additives Component E is melamin in an amount of from 50 to 200 % by weight based on A + B. The semifinished materials can be cured to give automotive, electrical or furniture parts.

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