Processing polyester sheet moulding cpd. waste - by hardening with exposure to electromagnetic waves and dumping or comminuting and using as filler

    公开(公告)号:DE4036781A1

    公开(公告)日:1992-05-21

    申请号:DE4036781

    申请日:1990-11-17

    Applicant: BASF AG

    Abstract: Processing waste material obtd. from the processing of polyester sheet moulding materials (SMC) consisting of mouldable self-supporting sheets of glass fibre reinforced thickened unsatd. polyester resin covered on both sides with a covering film, whereby the pieces of waste material are hardened by irradiatioon with electromagnetic waves, opt. mechanically comminuted and then either dumped or used as a filler. USE/ADVANTAGE - The SMC scrap can be hardened by irradiation eg with infra red or microwaves in less than 5, esp. less than 23 mins to give a hardened prod. contg. less than 3 wt.%, esp. less than 1 wt.% residual styrene. In this form the material can be dumped directly or it may be comminuted to give a prod. suitable for use as a filler eg in thermoplastics without exacting property requirements or as a glass rich filler for prodn. of SMC or BMC (polyester dough moulding compounds) according to EP application NO.9 01 13 009.6. (Dwg.0/0)

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