Cross-linkable compositions
First Claim
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1. A crosslinkable composition comprising(A) at least one crosslinkable compound selected from the group consisting of compounds (A1) of formula
A-[(CR12)b—
- SiRa(OR2)3-a]x
(II)whereA is an x-valent polymer radical bonded via nitrogen, phosphorus, oxygen, sulfur, carbon or a carbonyl group,R are identical or different and are monovalent, optionally substituted hydrocarbyl radicals,R1 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical which may be attached to the carbon atom via nitrogen, phosphorus, oxygen, sulfur or a carbonyl group,R2 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical,x is an integer from 1 to 10,a is 0, 1 or 2 andb is an integer from 1 to 10with the proviso that at least two OR2 groups per molecule are present, andcompounds (A2) of the formula
R5cZdSiO(4-c-d)/2
(III)whereR5 are identical or different and each is an optionally substituted hydrocarbyl radical which may be interrupted by oxygen atoms,Z are identical or different and are a hydroxyl radical or hydrolyzable radical,c is 0, 1, 2 or 3 andd is 0, 1, 2 or 3with the proviso that the sum of c+d is less than or equal to 4 and at least two Z radicals are present per molecule; and
(B) a calcium carbonate-containing filler (B0) surface-treated with carboxylic acids (C) of the formula
R4—
(OCR32—
C(═
O)OH)y
(I)whereR3 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical,R4 is a y-valent, carbon-bonded, optionally substituted hydrocarbyl radical which may be interrupted by oxygen atoms, andy is an integer from 1 to 3.
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Accused Products
Abstract
Crosslinkable compositions contain a calcium carbonate-rich filler coated with a carboxylic acid of the formula
R4—(OCR32—C(═O)OH)y.
The compositions exhibit low modulus, good adhesion to substrates, and low skin formation time.
8 Citations
10 Claims
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1. A crosslinkable composition comprising
(A) at least one crosslinkable compound selected from the group consisting of compounds (A1) of formula
A-[(CR12)b—- SiRa(OR2)3-a]x
(II)where A is an x-valent polymer radical bonded via nitrogen, phosphorus, oxygen, sulfur, carbon or a carbonyl group, R are identical or different and are monovalent, optionally substituted hydrocarbyl radicals, R1 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical which may be attached to the carbon atom via nitrogen, phosphorus, oxygen, sulfur or a carbonyl group, R2 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical, x is an integer from 1 to 10, a is 0, 1 or 2 and b is an integer from 1 to 10 with the proviso that at least two OR2 groups per molecule are present, and compounds (A2) of the formula
R5cZdSiO(4-c-d)/2
(III)where R5 are identical or different and each is an optionally substituted hydrocarbyl radical which may be interrupted by oxygen atoms, Z are identical or different and are a hydroxyl radical or hydrolyzable radical, c is 0, 1, 2 or 3 and d is 0, 1, 2 or 3 with the proviso that the sum of c+d is less than or equal to 4 and at least two Z radicals are present per molecule; and (B) a calcium carbonate-containing filler (B0) surface-treated with carboxylic acids (C) of the formula
R4—
(OCR32—
C(═
O)OH)y
(I)where R3 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical, R4 is a y-valent, carbon-bonded, optionally substituted hydrocarbyl radical which may be interrupted by oxygen atoms, and y is an integer from 1 to 3. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- SiRa(OR2)3-a]x
Specification