Claims
- 1. An accelerator system for the cold crosslinking of polymers which harden on exposure to moisture by hydrolysis/condensation, said accelerator system comprising in parts by weight:
- (C) x parts by weight of a catalyst for crosslinking the said polymers by polycondensation, x ranging from 0.01 to 10;
- (E) Y parts by weight of at least one solid inorganic compound containing an amount y of water in the form of water of hydration and/or water adsorbed by capillary condensation, the amount y ranging from 0.5 to 40 parts by weight of said accelerator system, and the amount y representing up to 70% of the weight of said solid inorganic compound;
- (F) z parts by weight of fillers, z ranging from 0 to 50;
- (D) 100-(x+Y+z) parts by weight of a diluent or of a solvent of the said catalyst (C), the diluent or solvent having a dynamic viscosity at 25.degree. C. of about 50 to about 200,000 mPa.s.;
- the respective amounts of the four constituents (C), (E), (F) and (D) being such that the accelerator system obtained exists in the form of a manipulable paste and is capable of accelerating cold crosslinking of polymers which harden on exposure to moisture by hydrolysis/condensation.
- 2. The accelerator system according to claim 1, wherein x ranges from 0.1 to 5; y ranges from 3 to 20; and z ranges from 1 to 30.
- 3. The accelerator system according to claim 1, wherein the catalyst (C) is based on tin, titanium, zirconium, manganese or lead.
- 4. The accelerator system according to claim 1, wherein said solid inorganic compound (E) is a hydrated crystalline alkali metal or alkaline-earth metal aluminosilicate, a hydrated silica gel or a hydrated inorganic salt containing water of crystallization.
- 5. The accelerator system according to claim 4, wherein said solid inorganic compound (E) is Na.sub.2 B.sub.4 O.sub.7.10H.sub.2 O containing 47% by weight of water, Na.sub.2 HPO.sub.4.12H.sub.2 O containing 60% by weight of water or Na.sub.2 CO.sub.3.10H.sub.2 O containing 63% of water.
- 6. The accelerator system according to claim 1, wherein said diluent or solvent (D) is selected from the group consisting of .alpha.,.omega.-bis(triorganosiloxy) polydiorgano-siloxanes, aromatic hydrocarbons, cycloaliphatic hydrocarbons, aliphatic hydrocarbons, halogenated aromatic hydrocarbons, halogenated cycloaliphatic hydrocarbons, halogenated aliphatic hydrocarbons, ketones, cycloaliphatic ketones, and esters.
- 7. The accelerator system according to claim 1, wherein said fillers (F) comprise silica.
Priority Claims (1)
Number |
Date |
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Kind |
93 11263 |
Sep 1993 |
FRX |
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Parent Case Info
This application is a divisional, of application Ser. No. 08/310,098, filed Sep. 22, 1994, now U.S. Pat. No. 5,681,884.
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Divisions (1)
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Number |
Date |
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Parent |
310098 |
Sep 1994 |
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