POLYMERIZATION OF OLEFINIC NITRILES AND DIENE RUBBERS

    公开(公告)号:KR810000395B1

    公开(公告)日:1981-04-27

    申请号:KR770000255

    申请日:1977-02-08

    Inventor: AZIZ W S LI G BALL L

    Abstract: An impact-resistant copolymer(I) having low gas permeability and high softening temp. is manufd. by grafting a nitrile rubber latex was grafted with acrylonitrile 70, indene 10, and isobutene 20g to give I having 264 psi heat distortion temp. 79≦̸C and notched Izod impact strength 7.3 ft-1b/in. notch which gave a film having 90% relative humidity water vapor transmission rate 3.5g-mil/100 in. 2/24hr/atm and O transmission rate 2.0 cm3-mil/100 in.2/24 hr/atm.

    XYLENE-FORMALDEHYDE RESIN COMPOSITION AND PROCESS

    公开(公告)号:KR800001710B1

    公开(公告)日:1980-12-31

    申请号:KR770001947

    申请日:1977-08-22

    Inventor: BALL L AZIZ W ROSEN I

    Abstract: Title resin with high mol. wt., low content, and high m. p., was prerd. by treating xylene with HCHO in the presence of an acid catalyst in a closed reaction vessel in the absened of air. Thus, 212 g m-xylene and 63.15 g p-formaldehyde were heated in a closed reaction vessel in the absence of air to 900C, mixed with 9.19 g HCIO4 and heated 3 hr while water was removed, giving after purifn. a polymer with softening point 1650C, glass temp. 1230C, mol. wt. 20,400, Gardner color 2, Brabender plasticorder torque at 35 rpm 830-650 mg after 13 min at 1800C, intrinsic viscosilty 0.12, and shore D hardness 84.

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