US 2010/0304017 A1 · URETHANE AND OLIGOURETHANE DERIVATIVES AND CORRESPONDING USES AND METHODS FOR PRODUCING WATER MARKS USING THE OFFSET PRINTING TECHNIQUE

Abstract

Urethane and oligourethane derivatives and corresponding uses and methods of producing watermarks using the offset printing technique. The invention relates to compounds having general formula (R—CO—NH—X—NH—CO—O—(-A-O—CO—NH—X′—NH—CO—O—)n—R′(I) where, for example, R and R′ are C3-C18 alkyl radicals or the radical from the dimer diol when loosing an OH group, X and X′ are radicals from an aliphatic diisocyanate, A is a C3-C18 alkylen radical, n is 0 or 1. The molecular weight of the compound is less than 2000 and the NCO value is equivalent to 0. The invention also relates to compositions containing this compound, to methods for producing watermarks using this compound and to uses of these compounds to produce watermarks both in laminar cellulosic materials and in laminar textile materials.

Claims35

Dependent claims

1- Compound Having General Formula

R—O—CO—NH—X—NH—CO—O—(-A-O—CO—NH—X′—NH—CO—O—)n—R′ (I)
where
R and R′ are C3-C18 alkyl radicals, C3-C18 hydroxyalkyl aliphatic radicals, the radical coming from the dimer did when losing one OH group, or mixtures of the former,
X y X′ are radicals from an aliphatic diisocyanate with a molecular weight less than 1000, preferably less than 500,
A is a C3-C18 alkylen radical (from an alkyldiol), the radical from the dimer diol when losing two OH groups, or mixtures of the former,
n is 0 or 1,
where the molecular weight of said compound is less than 2000, preferably less than 1000,
and where the value of NCO is equivalent to 0,

5 more elements

Urethane and oligourethane derivatives and corresponding uses and methods for producing water marks using the offset printing technique

Life of this patent

Urethane and oligourethane derivatives and corresponding uses and methods for producing water marks using the offset printing technique

Life of this patent

Abstract

Claims35