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    4.
    发明专利
    未知

    公开(公告)号：FI68638C

    公开(公告)日：1985-10-10

    申请号：FI793869

    申请日：1979-12-11

    Applicant: HOECHST AG

    Inventor： TESCHNER ECKART ,  SATTELMEYER RICHARD ,  HESSE WOLFGANG

    IPC: B24D11/00 ,  B24D3/28 ,  C08G8/08 ,  C08G8/24 ,  C08J5/14 ,  C08L61/06 ,  C08L61/10 ,  F26B13/02

    Abstract: Process for the manufacture of an abrasive material comprising at least two binder layers formed from at least one aqueous resol I prepared from a monohydric phenol and formaldehyde (molar ratio of phenol to formaldehyde 1:(1.1 to 2.5)) by the application of a first binder layer onto a carrier material, scattering abrasive particles thereon, drying the covering layer in a horizontal dryer to displacement resistance and thereafter cooling with an air stream, application of a second binding agent layer and in similar manner to the first step, drying to imprint resistance and thereafter cooling, whereby the heating and cooling are each effected by means of an air stream through slit nozzles arranged transversely to the direction of travel of the abrasive web and, after loosely forming the product into a roll, final curing is effected on the product in roll form, the coated carrier material being conveyed at speeds above 5 m/min through the dryers which have well defined and individually controllable heating and cooling zones and the air stream has a velocity of 5 to 200 m/s at the nozzle outlets and a temperature of 20 to 300 DEG C., the air being extracted through adjacent extraction nozzles.

    5.
    发明专利
    未知

    公开(公告)号：FI68638B

    公开(公告)日：1985-06-28

    申请号：FI793869

    申请日：1979-12-11

    Applicant: HOECHST AG

    Inventor： TESCHNER ECKART ,  SATTELMEYER RICHARD ,  HESSE WOLFGANG

    IPC: B24D11/00 ,  B24D3/28 ,  C08G8/08 ,  C08G8/24 ,  C08J5/14 ,  C08L61/06 ,  C08L61/10 ,  F26B13/02

    Abstract: Process for the manufacture of an abrasive material comprising at least two binder layers formed from at least one aqueous resol I prepared from a monohydric phenol and formaldehyde (molar ratio of phenol to formaldehyde 1:(1.1 to 2.5)) by the application of a first binder layer onto a carrier material, scattering abrasive particles thereon, drying the covering layer in a horizontal dryer to displacement resistance and thereafter cooling with an air stream, application of a second binding agent layer and in similar manner to the first step, drying to imprint resistance and thereafter cooling, whereby the heating and cooling are each effected by means of an air stream through slit nozzles arranged transversely to the direction of travel of the abrasive web and, after loosely forming the product into a roll, final curing is effected on the product in roll form, the coated carrier material being conveyed at speeds above 5 m/min through the dryers which have well defined and individually controllable heating and cooling zones and the air stream has a velocity of 5 to 200 m/s at the nozzle outlets and a temperature of 20 to 300 DEG C., the air being extracted through adjacent extraction nozzles.

    7.
    发明专利
    未知

    公开(公告)号：FI67088C

    公开(公告)日：1985-01-10

    申请号：FI782571

    申请日：1978-08-23

    Applicant: HOECHST AG

    Inventor： HESSE WOLFGANG ,  SATTELMEYER RICHARD ,  TESCHNER ECKART

    IPC: C08L61/00 ,  B24D3/28 ,  B24D11/00 ,  C08G8/24 ,  C08J5/14 ,  C08L61/04 ,  C08L61/06 ,  C08L61/10 ,  C08L61/12 ,  C09J161/06 ,  C09J3/16

    Abstract: A synthetic resin binder comprising an aqueous mixture of phenolic resins and optionally other additives wherein the mixture of phenolic resins comprises (I) at least one phenol-resol and (II) at least one co-condensate of at least one monohydric phenol and at least one polyhydric phenol with formaldehyde and wherein in component (II) the molar ratio of the quantities of formaldehyde used to the sum of phenols is within the range of from 0.6:1 to 1.5:1, a method for the manufacture of an abrasive by means of said synthetic resin binder and the abrasives itself.

    PROCESS FOR THE MANUFACTURE OF ABRASIVES
    10.
    发明专利
    PROCESS FOR THE MANUFACTURE OF ABRASIVES 未知

    公开(公告)号：CA1143167A

    公开(公告)日：1983-03-22

    申请号：CA341737

    申请日：1979-12-12

    Applicant: HOECHST AG

    Inventor： TESCHNER ECKART ,  SATTELMEYER RICHARD ,  HESSE WOLFGANG

    IPC: B24D11/00 ,  B24D3/28 ,  C08G8/08 ,  C08G8/24 ,  C08J5/14 ,  C08L61/06 ,  C08L61/10 ,  F26B13/02 ,  C09K3/14 ,  C09J3/16

    Abstract: HOE 78/A 016 A process for the preparation of an abrasive material having two binder layers which comprises the steps (i) applying a first binder layer to a flexible sheet-like support; (ii) scattering abrasive particles onto the said first binder layer; (iii) drying the product of step (ii) in a horizontal drying unit and subsequently cooling the product in a air stream, the drying process being effected so that the said first binder layer attains sufficient adhesive strength to prevent displacement of the abrasive particles therein when the product is cooled; (iv) applying a second binder layer as sizer to the cooled product of step (iii); (v) drying the said second binder layer in a horizontal drying unit and subsequently cooling the product, heating and cooling being performed in a similar manner to that of step (iii), the drying process being effected so that the said second binder layer becomes imprint resistant; (vi) loosely rolling up the product of step (v); and (vii) curing the product of step (vi) wherein at least one of the said binder layers comprises at least one aqueous monohydric phenol resol I (molar ratio of phenol: formaldehyde l:(l.l - 2.5) wherein the heating and cooling are performed by means of air-stream through slit nozzles equipped transversely to the course direction of the product and wherein the coated carrier material is conveyed with a speed of about 5 m/min through the drying unit which has well defined, independently controllable heating and cooling zones and wherein the air stream has a speed between 5 and 200 m/sec at the slit nozzles and an outlet temperature between 20 and 300.degree.C dependent on the temperature zone and wherein the air is drawn off with adjacent suction nozzles.

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