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Allophanate Composition

A composition, technology of isocyanate components, applied in the preparation of coating compositions, solvents, with low viscosity compared with prior art compositions. field, which can solve problems such as rapid doubling of viscosity in compositions

Active Publication Date: 2018-11-06
VENCOREX FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the doubling of the viscosity of the prior art compositions is too rapid and causes problems in the use of these compositions

Method used

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  • Allophanate Composition
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0176] Example 1: The dynamic viscosity of the formulation varies with the Tolonate in the polyisocyanate mixture used TM X-FLO 100's Scale change:

[0177] The dynamic viscosity of formulation (A) + (B) is measured immediately (within a delay of less than one minute) after mixing parts (A) and (B), the mixture ratio follows the molar ratio between NCO and NH functionality equal to 1. The measurement of dynamic viscosity utilizes Rheomat RM300 viscometer with constant shear rate (150s -1 )conduct.

[0178] Composition (A)

Composition (B)

Measured dynamic viscosity (mPa.s)

Modeled dynamic viscosity (mPa.s)

A1

B1

1161.3

1139.7

A1

B2

969.1

971.2

A1

B3

788.0

808.4

A1

B4

627.3

650.9

A1

B5

480.7

498.5

A1

B6

362.1

351.0

A2

B1

1259.4

1275.3

A2

B2

1140.0

1,082.3

A2

B3

934.6

895.9

A2

B4

691.5

715.5

A2

...

Embodiment 2

[0181] Example 2: Pot life duration of formulations as a function of Tolonate in the polyisocyanate mixture used TM X-FLO A change in scale of 100:

[0182] The duration of the pot life of the formulations (A)+(B) was determined by evaluating the time required for the dynamic viscosity of the formulation to double. The evaluation of the pot life duration is for a mixture ratio which follows a molar ratio between NCO and NH functionalities equal to 1. The measurement of dynamic viscosity utilizes Rheomat RM300 viscometer with constant shear rate (150s -1 )conduct.

[0183]

[0184] The duration of the pot life of the formulations (A)+(B) was determined by evaluating the time required for the dynamic viscosity of the formulation to double. The evaluation of the pot life duration is for a mixture ratio which follows a molar ratio between NCO and NH functionalities equal to 1. Dynamic viscosity was measured using Anton Paar MCR-302 rheometer in oscillation mode at 0.1...

Embodiment 3

[0188] Example 3: Open time and drying time of the applied film as a function of the polyisocyanate mixture used Tolonate TM X-FLO 100 Scale Changes:

[0189] Drying time of films obtained from formulations (A)+(B) applied on glass-type substrates according to standard ENISO 9117-5 for mixture ratios following molar ratio between NCO and NH functionality equal to 1 to evaluate.

[0190]

[0191] Drying times of films obtained from formulations (A)+(B) applied on substrates of glass type according to standard ASTM D-5895, using a drying time mechanical recorder of type BK, for compliance with NCO and NH functionality The ratio of the mixture with a molar ratio equal to 1 is evaluated.

[0192]

[0193]

[0194] The results show that the drying time varies with the Tolonate in the formulation (B) used TM The ratio of X-FLO 100 increases with increasing.

[0195] It is also increased since the open time of the film is related to the same reaction mechanism as ...

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Abstract

The present invention relates to a composition for the preparation of coatings comprising (a) a compound comprising at least two secondary amine functions and (b) an isocyanate component comprising an allophanate and a polyfunctional isocyanate, and (c) optionally solvent. The invention also relates to the use of such compositions for the production of coatings whose hydrophobicity is improved, and for increasing the pot life duration (pot life properties) of paint or varnish formulations or for increasing the pot life of paint or varnish formulations through application. The open time of the film or layer obtained by the composition.

Description

technical field [0001] The present invention relates to a composition for the preparation of coatings comprising (a) at least one compound comprising at least two secondary amine functions and (b) an isocyanate group comprising at least one allophanate and at least one polyfunctional isocyanate Partition, and optionally, solvent. [0002] In particular, the present invention relates to compositions for the preparation of coatings comprising [0003] (a) at least one compound selected from [0004] ■Compounds of formula (Q) [0005] [0006] ■ Compounds comprising at least two secondary amine functions and obtained by the reaction of (a1) at least one compound comprising at least one primary amine function and (a2) at least one compound comprising an ester function (C(O)OR) A compound with a double bond (C=C) at the α position of the nitrile functional group (CN) or at least one compound containing a double bond (C=C) at the α position of the nitrile functional group (CN)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02C08G18/78C08G18/79C08G18/72C08G18/38
CPCC08G18/725C08G18/792C09D175/02C08G18/3821C08G18/7837C08G18/4623C08G18/7831C08G18/7887
Inventor R·库鲁克J-M·伯纳德
Owner VENCOREX FRANCE
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