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    PROCESS FOR PREPARING FIBRE-REINFORCED MOULDED ARTICLES
    3.
    发明专利
    PROCESS FOR PREPARING FIBRE-REINFORCED MOULDED ARTICLES 未知

    公开(公告)号：DE3066013D1

    公开(公告)日：1984-02-02

    申请号：DE3066013

    申请日：1980-09-29

    Applicant: BAYER AG

    Inventor： RECKER KLAUS DR ,  REINECKE GERD ING GRAD ,  AWATER ALBERT DR ,  GROGLER GERHARD DR ,  KRAFT KARL JOSEF DR

    IPC: C08J5/24 ,  B29C43/02 ,  B29C43/10 ,  B29C43/12 ,  B29C57/00 ,  B29C67/00 ,  B29C70/00 ,  C08G18/08 ,  C08G18/72 ,  C08J5/04 ,  C08K7/02 ,  C08K7/14

    Abstract: The instant invention is directed to a process for the production of fiber-reinforced molded products, comprising: (1) mixing at a temperature of from 10 DEG to 50 DEG C., (a) 7 to 35% by weight of a polyisocyanate having a melting point above 100 DEG C., and (b) 14 to 35% by weight of a polyisocyanate which is liquid at the reaction temperature of mixing, with (c) 43 to 62% by weight of one or more compounds having molecular weights of 300 to 10,000 containing 2 to 8 hydroxyl groups, and (d) 3 to 10% by weight of a chain-lengthening agent having a molecular weight of 62 to 250 containing 2 to 4 hydroxyl groups, (e) 0 to 5% by weight of a compound having a molecular weight below 1,000 containing from 2 to 4 amino groups or an equivalent quantity of water, (f) 0 to 5% by weight of a molecular sieve of the sodium aluminum silicate type, and (g) 0 to 5% by weight of one or more activators, all percentages being based on the total weight of (a) through (g) and components (b) through (e) being liquid at the chosen reaction temperature of mixing and having an average functionality of isocyanate-reactive groups of 2.5 to 3.5, the equivalent ratio of isocyanate groups in component (b) to isocyanate-reactive hydrogen atoms in components (c) through (e) being from 0.4:1 to 0.85:1 and the equivalent ratio of isocyanate groups in component (a) to isocyanate-reactive hydrogen atoms in components (c) through (e), taking into account any masked isocyanate groups being from 0.15:1 to 1.2:1, with the proviso that the average functionality of components (c) through (e) should be at least 2.65 when the first-mentioned equivalent ratio is less than or equal to 0.65:1 and not more than 3.0 when the equivalent ratio is greater than or equal to 0.70:1; (2) adding a fiber material having a fiber length of from 10 to 100 mm; and (3) after storing for from one hour to four days, curing and shaping the molding compound at a temperature above 90 DEG C. and at a pressure of from 20 to 300 bars.

    5.
    发明专利
    未知

    公开(公告)号：DE2941051A1

    公开(公告)日：1981-04-23

    申请号：DE2941051

    申请日：1979-10-10

    Applicant: BAYER AG

    Inventor： RECKER KLAUS DR ,  REINECKE GERD ING GRAD ,  AWATER ALBERT DR ,  GROEGLER GERHARD DR ,  KRAFT KARL-JOSEF DR

    IPC: C08J5/24 ,  B29C43/02 ,  B29C43/10 ,  B29C43/12 ,  B29C57/00 ,  B29C67/00 ,  B29C70/00 ,  C08G18/08 ,  C08G18/72 ,  C08J5/04 ,  C08K7/02 ,  C08K7/14 ,  C08L75/04 ,  C08K3/40

    Abstract: The instant invention is directed to a process for the production of fiber-reinforced molded products, comprising: (1) mixing at a temperature of from 10 DEG to 50 DEG C., (a) 7 to 35% by weight of a polyisocyanate having a melting point above 100 DEG C., and (b) 14 to 35% by weight of a polyisocyanate which is liquid at the reaction temperature of mixing, with (c) 43 to 62% by weight of one or more compounds having molecular weights of 300 to 10,000 containing 2 to 8 hydroxyl groups, and (d) 3 to 10% by weight of a chain-lengthening agent having a molecular weight of 62 to 250 containing 2 to 4 hydroxyl groups, (e) 0 to 5% by weight of a compound having a molecular weight below 1,000 containing from 2 to 4 amino groups or an equivalent quantity of water, (f) 0 to 5% by weight of a molecular sieve of the sodium aluminum silicate type, and (g) 0 to 5% by weight of one or more activators, all percentages being based on the total weight of (a) through (g) and components (b) through (e) being liquid at the chosen reaction temperature of mixing and having an average functionality of isocyanate-reactive groups of 2.5 to 3.5, the equivalent ratio of isocyanate groups in component (b) to isocyanate-reactive hydrogen atoms in components (c) through (e) being from 0.4:1 to 0.85:1 and the equivalent ratio of isocyanate groups in component (a) to isocyanate-reactive hydrogen atoms in components (c) through (e), taking into account any masked isocyanate groups being from 0.15:1 to 1.2:1, with the proviso that the average functionality of components (c) through (e) should be at least 2.65 when the first-mentioned equivalent ratio is less than or equal to 0.65:1 and not more than 3.0 when the equivalent ratio is greater than or equal to 0.70:1; (2) adding a fiber material having a fiber length of from 10 to 100 mm; and (3) after storing for from one hour to four days, curing and shaping the molding compound at a temperature above 90 DEG C. and at a pressure of from 20 to 300 bars.

    10.
    发明专利
    未知

    公开(公告)号：DE1940181A1

    公开(公告)日：1971-02-25

    申请号：DE1940181

    申请日：1969-08-07

    Applicant: BAYER AG

    Inventor： MEISERT ERNST DR ,  AWATER ALBERT DR ,  MUEHLHAUSEN CORNELIUS DR ,  JENS DR DOEBEREINER UWE

    IPC: C08G18/00 ,  C08G18/10 ,  C08G18/48 ,  C08G18/65 ,  C08G22/08

    Abstract: Polyurethane elastomers are prepared by reacting a prepolymer (A) of a polyether diol and a diisocyanate with a mixture (B) of a polyester diol and a lower molecular weight glycol at a temperature of from about 60 DEG C. to about 180 DEG C. The reaction product of (A) and (B) is resistant to separation and the polyurethane elastomers combine all of the advantageous properties of both polyether polyurethanes and polyester polyurethanes and are useful as foils and coatings and can be molded into a variety of elastomeric products.

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