Silane end capped substituted urea resins and coatings thereof
AssigneeThe Government of the United States of America, as represented by the Secretary of the Navy
InventorsArthur A. Webb, Jozef Verborgt
Life of this patent
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Abstract
The compound below. R1 is an alkyl group or —(SiR72—O)m—R8. R7 is an alkoxy group. The value m is a nonnegative integer. R8 is an alkyl group or R3 and R4 are organic groups. R5 is an aliphatic group or a residue of a homopolymer of an aliphatic polyisocyanate. R6 has an electron withdrawing group that is bound to a carbon atom that is bound to the CHR4 group. The value n is an integer greater than or equal to 2. A method of: reacting a 3-trialkoxysilylpropyl amine with an organic compound having a carbon-carbon double bond activated by an electron withdrawing group to form a secondary amino propylalkoxysilane, and reacting the secondary amino propylalkoxysilane with an aliphatic polyisocyanate or a polymer thereof.
Claims20
A compound having the formula:
- wherein each R1 is an independently selected alkyl group or —(SiR72—O)m—R8;
- wherein each R7 is an independently selected alkoxy group;
- wherein m is a nonnegative integer;
- and
- wherein each R8 is an independently selected alkyl group or
- wherein each R3 and R4 is an independently selected organic group;
- wherein R5 is an aliphatic group or a residue of a homopolymer of an aliphatic polyisocyanate;
- wherein R6 comprises an electron withdrawing group that is bound to a carbon atom that is bound to the CHR4 group;
- and
- wherein n is an integer greater than or equal to 2.
A method comprising:
- reacting a 3-trialkoxysilylpropyl amine with an organic compound having a carbon-carbon double bond activated by an electron withdrawing group to form a secondary amino propylalkoxysilane;
- and
- reacting the secondary amino propylalkoxysilane with an aliphatic polyisocyanate or a polymer thereof to form the compound
- wherein each R1′ is an independently selected alkyl group;
- wherein each R3 and R4 is an independently selected organic group;
- wherein R5 is the residue of the polyisocyanate;
- wherein R6 comprises the electron withdrawing group bound to a carbon atom, which is bound to the CHR4 group;
- and
- wherein n is an integer greater than or equal to 2.
Dependencies are inferred from the claim text.