Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Reexamination Certificate
2007-06-26
2010-11-30
Egwim, Kelechi C (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
C524S474000
Reexamination Certificate
active
07842772
ABSTRACT:
The present invention relates to a composition for cross-linking and stabilization of a polymer containing hydrolysable silane groups comprising a sulphonic acid as a silanol condensation catalyst characterized in that it comprises a stabilizer which is neutral or acidic, does not contain ester groups and is a compound according to formula (I):whereinR is an unsubstituted or substituted aliphatic or aromatic hydrocarbyl radical which may comprise heteroatoms,R′ is a hydrocarbyl radical,R″ is a hydrocarbyl radical and R′ and/or R″ being a bulky radical,X1, X2or X3is the same or different H or OH, whereby at least X1, X2or X3is OH,and n is 1 to 4;or a compound according to formula (II):in-line-formulae description="In-line Formulae" end="lead"?R′″—(S)p—R′″ (II)in-line-formulae description="In-line Formulae" end="tail"?whereinR′″ is an aliphatic hydrocarbyl radical andp is 1 to 6;or a mixture of any of such compounds, to a stabilized polymer comprising the above stabilizers and to a process for cross-linking and stabilization of silane group containing polymers in the presence of the above mentioned stabilizers.
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Fagrell Ola
Gothe Mattias
Borealis Technology Oy
Egwim Kelechi C
Fay Sharpe LLP
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