Patent ID: 8399575

Claim:
A moisture free, moisture-curable, single component, room temperature vulcanizable composition which is storage stable with exclusion of water and cures to a solid elastomer in the presence of water, comprising: (A) at least one compound of the formula A-[CR 1 2 —SiR a (OR 2 ) 3-a ] x (I), where A is an x-valent organic radical bonded to —CR 1 2 — via nitrogen, phosphorus, oxygen, sulfur or a carbonyl group, R each independently is a monovalent, optionally substituted hydrocarbon radical, R 1 each independently is hydrogen or a monovalent, optionally substituted hydrocarbon radical, R 2 each independently is a monovalent, optionally substituted hydrocarbon radical, x is an integer from 1 to 10, a is 0, 1 or 2, (B) at least one compound which contains at least one basic element of main group 5, selected from the group consisting of (B1) compounds comprising basic nitrogen and (B2) compounds comprising basic phosphorus, (C) at least one acid selected from the group consisting of (C1) phosphorus acids of the formula O═PR 20 q (OH) r (OR 21 ) 3-q-r (III) and/or condensates thereof with one or more P—O—P bonds and (C2) carboxylic acids of the formula HOC(═O)R 22 (IV), where R 20 each independently is an optionally substituted hydrocarbon radical which may be interrupted by oxygen atoms, R 21 each independently is a hydrogen atom or an optionally substituted hydrocarbon radical which may be interrupted by oxygen atoms, R 22 each independently is an optionally substituted hydrocarbon radical which may be interrupted by oxygen atoms, q is 0, 1 or 2, r is 1, 2 or 3 and q+r is 1, 2 or 3, and (D) at least one silane of the formula X—CR 1 ′ 2 —SiR′ b Y 3-b (II) and/or partial hydrolyzates thereof, where X is a monovalent organic radical bonded to —CR 1 ′ 2 — via nitrogen, phosphorus, oxygen, sulfur or a carbonyl group, R 1 ′ each independently is as defined for R 1 , R′ each independently is as defined for R, Y each independently is a hydrolyzable radical, and b is 0, 1 or 2, wherein the pH of the mixture of components (B), (C), and (D) is less than or equal to 7.