Use of an organopolysiloxane composition vulcanizable at room temperature to form a self-adhesive elastomer

Use of an organopolysiloxane composition vulcanizable at room temperature to form a self-adhesive elastomer

  • CN 101,287,787 A
  • Filed: 06/14/2006
  • Published: 10/15/2008
  • Est. Priority Date: 06/24/2005
  • Status: Active Application
First Claim
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1. begin can vulcanize the purposes that the organopolysiloxane composition that produces silicone elastomer is used to prepare autoadhesion strip of paper used for sealing and/or tackiness agent by polycondensation from room temperature, this autoadhesion strip of paper used for sealing and/or tackiness agent keep good binding property in thermal treatment under 〉

  • =100 ℃

    the temperature after 3 days;

    -rupture stress 〉

    =1.2MPa andThe poly-fracture of-Nei phase 〉

    =70%,Described organopolysiloxane composition comprises;

    A) can in the presence of catalyzer, solidify the organosilicon basic material that produces silicone elastomer, comprise by polycondensation;

    At least a α

    of-per 100 weight parts, alpha, omega-dihydroxy diorganopolysiloxanecompositions reactive polymer (A),At least a linking agent (B) of-0.1 to 60 weight part andThe water of-0.001 to 10 weight part, andB) the polycondensation catalyst system (D) of catalytically effective amount,Described composition is characterised in that catalyst system (D) is made of the mixture of tin-silicon compound (D1) and at least a amination polyalkoxysilane compound (D3), and described compound meets following definition;

    -Xi-silicon compound (D1) is at least a organic alkoxy that meets following general formula (I)Silane;

    R 0aSi(OR 1) 4-a(I)With at least a dialkyltin salts that meets following general formula (II);

    R 2R 3Sn(OCOR 4) 2(II)Reaction product,In these formulas;

    -R 0Substituting group representative;

    the aliphatic hydrocarbyl of saturated or undersaturated straight chain or branching, the monocycle or the polycyclic carbon ring group of saturated or undersaturated and/or aromatics, -R 1Substituting group is identical or different, represents saturated or undersaturated aliphatic hydrocarbyl;

    R 1Can also be meant ROR '"'"' 1Group, wherein R is the bivalent hydrocarbon radical with maximum 6 carbon atoms, R '"'"' 1Represent saturated or undersaturated aliphatic hydrocarbyl;

    -a=0,1,2 or 3;

    -R 2, R 3And R 4Substituting group is represented the aliphatic hydrocarbyl of saturated or undersaturated straight chain or branching independently of one another, the monocycle or the polycyclic carbon ring group of saturated or undersaturated and/or aromatics;

    With -amination polyalkoxysilane compound (D3) has following general formula;

    (R 5) b(R 6) cSi(OR 7) 4-(b+c)(III)In the formula;

    -b=0 or 1;

    -c=

    1;

    -R 5Represent the aliphatic hydrocarbyl of saturated or undersaturated straight chain or branching, the monocycle or the polycyclic carbon ring group of saturated or undersaturated and/or aromatics, -R 7Represent saturated or undersaturated aliphatic hydrocarbyl separately independently of one another;

    -R 6Represent the functional group of following formula;

    -Z-(X) nWherein;

    -n=1 or 2;

    -Z represents divalent group, and it is derived from being selected from following group;

    saturated or undersaturated aliphatic hydrocarbyl, the monocycle or the polycyclic carbon ring group of saturated, undersaturated and/or aromatics;

    Described divalent group is optional by at least one Sauerstoffatom and/or replacement of at least one nitrogen-atoms or interval;

    -X representative;

    --NR 8R 9Residue, wherein R 8And R 9Substituting group is identical or different, represents hydrogen atom separately, and is optional by the amino saturated or undersaturated straight chain that replaces or the aliphatic hydrocarbyl of branching, the monocycle or the polycyclic carbon ring group of saturated or undersaturated and/or aromatics, R 8And R 9Substituting group can randomly form ring with the nitrogen-atoms that they connected in addition jointly, contains 3 to 6 carbon atoms and one or two nitrogen-atoms in this ring;

    Or --R 10-NH 2Group, wherein symbol R 10Represent divalent group, it is derived from being selected from following group;

    saturated or undersaturated aliphatic hydrocarbyl, the monocycle or the polycyclic carbon ring group of saturated, undersaturated and/or aromatics;

    And have saturated or undersaturated aliphatic hydrocrbon part and the monocycle of saturated, undersaturated and/or aromatics or a group of polycyclic isocyclic part;

    Described divalent group is optional by at least one Sauerstoffatom and/or replacement of at least one nitrogen-atoms or interval;

    Described amination polyalkoxysilane (D3) can be randomly provides with the form derived from the hydrolysis condensation product of formula (III).

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