Expandable copolymer resin and preparation method thereof

Expandable copolymer resin and preparation method thereof

  • CN 106,220,887 B
  • Filed: 08/29/2016
  • Issued: 11/10/2017
  • Est. Priority Date: 08/29/2016
  • Status: Active Grant
First Claim
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1. a kind of expandable copolymer resin, in parts by weight, its raw material include mix monomer 100, deionized water 120-300, dividedPowder 0.2-0.8, foaming agent 7-12, initiator 0.3-0.8, modified additive 0.03-0.2;

  • Mix monomer is by styrene (ST) and methyl methacrylate(

    MMA)

    Form, in terms of the parts by weight of mix monomer 100, ST;

    MMA= 75;

    25-70;

    30;

    The preparation method of described copolymer resins concretely comprises the following steps:

    By deionized water, mix monomer, dispersant, initiator, modificationLow temperature polymerization is carried out after auxiliary agent mixing, polymerization temperature is 60-100 DEG C, reaches defined 4-10 hours in low temperature polymerization reaction timeAfterwards, foaming agent is added, carries out high temperature reaction, reaction temperature is 90-130 DEG C, pressure 0.4-0.9 MPa, reaches defined anti-Between seasonable after 4-10 hours, temperature≤

    50 DEG C are cooled to;

    After cooling, then respectively carry out centrifuge washing, drying, screening, coating, intoProduct are packed;

    The dispersant uses inorganic dispersant active calcium phosphate (TCP);

    The foaming agent is C4-C6Low boiling hydrocarbon compound;

    The modified additive is Tissuemat E, dioctyl phthalate (DOP).

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