Polyvinyl chloride propenoic acid esters impact modifier

Polyvinyl chloride propenoic acid esters impact modifier

  • CN 1,244,631 C
  • Filed: 08/26/2003
  • Issued: 03/08/2006
  • Est. Priority Date: 07/24/2003
  • Status: Active Grant
First Claim
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1. the polyvinyl chloride acrylic ester impact-resisting modifier of a weathering resistance, shock resistance, excellent processability is made by following weight percentages:

  • acrylate nucleoid-shell graft copolymer 65-97%, processing aid 3-35%, described acrylate nucleoid-shell graft copolymer partly is made up of nuclear part and shell, the nuclear part is an acrylic ester elastomer, the weight percent content of acrylic ester elastomer in acrylate nucleoid-shell graft copolymer is greater than 80%, and the latex of described acrylate nucleoid-shell graft copolymer is prepared from by following method;

    (1) seed latex is synthetic;

    with the tensio-active agent of the radical initiator of the linking agent that contains two or more carbon-carbon double bonds of the water of 80-120 weight part, 40-60 parts by weight of acrylic alkyl ester, 0.01-3 weight part, 0.001-1 weight part, 0.1-2 weight part, join in the reactor, be warming up to 50-80 ℃

    at nitrogen atmosphere, obtained the seed latex that number average bead diameter is 120-160nm in 6-10 hour with 100-500 rev/min speed stirring reaction;

    (2) the acrylic ester elastomer emulsion is synthetic;

    with the water of 60-100 weight part, the seed latex that the step of 20-80 weight part (1) obtains, 0.3-1.5 the tensio-active agent of weight part joins in the reactor, in nitrogen atmosphere, be warming up to 50-80 ℃

    , under 100-500 rev/min speed agitation condition again with 80-100 parts by weight of acrylic alkyl ester, 0.01-5 the linking agent that contains two or more carbon-carbon double bonds of weight part and the radical initiator of 0.001-1 weight part are divided into 2-4 and criticize adding, each timed interval that adds is 1-3 hour, is incubated the emulsion that obtained containing acrylate elastomer in 3-5 hour then;

    (3) acrylate nucleoid-shell graft copolymer is synthetic;

    contain the elastomeric emulsion of 150-200 parts by weight of acrylic acid ester class with what step (2) obtained, the water of 1-25 weight part, 0.01-0.5 the tensio-active agent of weight part, the alkyl methacrylate of 1-25 weight part, 0-2.5 the radical initiator of parts by weight of acrylic alkyl ester and 0.001-0.2 weight part joins in the reactor, under nitrogen atmosphere, be warming up to 50-80 ℃

    , with down reaction 3-5 hour of 100-500 rev/min speed agitation condition, obtaining the acrylic ester elastomer weight percent content is the emulsion of acrylate nucleoid-shell graft copolymer of 150-500nm greater than 80% number average bead diameter;

    Described processing aid is selected from following processing aid A, B, C, D, E, F, and they are made by following preparation method respectively;

    (1) processing aid A;

    the alkyl methacrylate of the water of 50-70 weight part, 30-40 weight part, 0-20 parts by weight of acrylic alkyl ester, the tensio-active agent of 0.1-1 weight part, the radical initiator of 0.001-0.2 weight part are joined in the reactor, to be warming up to 50-80 ℃

    under 50-500 rev/min the speed stirring, reacted 2-4 hour;

    (2) processing aid B;

    the alpha-methyl styrene of the vinyl cyanide of the vinylbenzene of the water of 50-70 weight part, 20-25 weight part, 1-10 weight part, 0-10 weight part, 0-10 parts by weight of acrylic alkyl ester, the tensio-active agent of 0.1-1 weight part, the radical initiator of 0.001-0.2 weight part are joined in the reactor, to be warming up to 50-80 ℃

    under 50-500 rev/min the speed stirring, reacted 2-4 hour;

    (3) processing aid C;

    The emulsion of described processing aid A and the emulsion mixing of described processing aid B are obtained, and wherein the weight percent content of processing aid A, B emulsion is;

    described processing aid A;

    0<

    processing aid A<

    100%, described processing aid B;

    0<

    processing aid B<

    100%;

    (4) processing aid D;

    the total weight parts that the vinyl cyanide of the water of 100 weight parts, the vinylbenzene of alkyl methacrylate, 0-30 parts by weight of acrylic alkyl ester, 0-85 weight part by the 0-100 weight part and 0-40 weight part is formed is that 100 composition, the tensio-active agent of 0.1-2 weight part, the radical initiator of 0.001-1 weight part join in the reactor, to be warming up to 50-80 ℃

    under 50-500 rev/min the speed stirring, reacted 2-4 hour;

    (5) processing aid E;

    the monomer mixture that adds the emulsion of processing aid B in the emulsion of processing aid A joins in the reactor, to be warming up to 50-80 ℃

    under 50-500 rev/min the speed stirring, reaction obtained the emulsion of processing aid E in 2-4 hour, wherein the weight percent content of the emulsion of processing aid A is 0<

    processing aid A<

    100%, and the weight percent content of the monomer mixture of processing aid emulsion B is monomer mixture<

    100% of 0<

    processing aid B;

    (6) processing aid F;

    the monomer mixture that adds the emulsion of processing aid A in the emulsion of processing aid B joins in the reactor, to be warming up to 50-80 ℃

    under 50-500 rev/min the speed stirring, reaction obtained the emulsion of processing aid F in 2-4 hour, wherein the weight percent content of the emulsion of processing aid B is 0<

    processing aid B<

    100%, and the weight percent content of the monomer mixture of the emulsion of processing aid A is monomer mixture<

    100% of 0<

    processing aid A.

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