EXPANDABLE STYRENE POLYMER
    3.
    发明专利

    公开(公告)号:JPH10101838A

    公开(公告)日:1998-04-21

    申请号:JP19171097

    申请日:1997-07-17

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To obtain an expandable styrene polymer containing a foaming agent and a specific foaming auxiliary and exhibiting an improved expandable characteristic without affecting other treating characteristics and product characteristics. SOLUTION: This expandable styrene polymer contains a foaming agent and 0.5-20wt.% of a foaming auxiliary. Therein, the foaming auxiliary comprises a 2-20C aliphatic olefin oligomer which is liquid at room temperature and has a number - average polymerization degree of 2-200, preferably 2-100, and plural terminal double bonds, such as propene oligomer or isobutene oligomer.

    PRODUCTION OF RIGID POLYURETHANE FOAM HAVING LOW THERMAL CONDUCTIVITY

    公开(公告)号:JPH1180539A

    公开(公告)日:1999-03-26

    申请号:JP18602698

    申请日:1998-07-01

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To produce the subject foam having lowered thermal conductivity and good handleability, etc., and useful as an insulation material for composite element, etc., by adding graphite to an organic polyisocyanate, etc., and a compound having reactive hydrogen atom and reacting the mixture in the presence of a foaming agent, etc. SOLUTION: The objective foam useful for filling the hollow space of a refrigeration apparatus or a heating element is produced by reacting (A) an organic polyisocyanate and/or a modified organic polyisocyanate (e.g. diphenylmethane diisocyanate) with (B) one or more kinds of compounds having >=2 reactive hydrogen atoms (e.g. polyether polyol) in the presence of (C) a foaming agent, (D) a catalyst and optionally (E) an assistant and/or an additive. In the above reaction, preferably 1-10 wt.% (based on the whole foam) of graphite is added to the component A and/or B. Preferably, >=50% of the graphite has particle diameter of

    EXPANDABLE RUBBER-MODIFIED STYRENE POLYMER, ITS PRODUCTION, AND PRE-EXPANDED BEAD

    公开(公告)号:JPH10310675A

    公开(公告)日:1998-11-24

    申请号:JP10742498

    申请日:1998-04-17

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To provide an expandable rubber-modified styrene polymer showing improved elasticity recovery, by incorporating a low-boiling blowing agent in a polymer mixture comprising a continuous phase of a styrene copolymer and rubber particles dispersed therein and comprising a butadiene/styrene block copolymer, and having a lamella structure free from polystyrene. SOLUTION: The expandable styrene polymer contains desirably 85-93 wt.% polystyrene or styrene copolymer (containing up to 50 wt.%, desirably up to 80 wt.% comonomer). The polystyrene contains a small amount (0.005-0.05 mol based on the styrene) of a crosslinking agent to be copolymerized. The expandable styrene polymer is desirably one containing 5-30 wt.% butadiene/styrene block copolymer in the polymer mixture and dispersed in the polystyrene phase in the form of particles. The ratio of the average length 1 of the rubber particles to the average thickness d is desirably above 5/1. The mixture contains 2-15 pts.wt., based on the composition, low-boiling blowing agent.

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