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Allophanate composition

A technology of allophanate, composition, applied in the preparation of coating composition, solvent with low viscosity compared with prior art composition. field, can solve the problem of viscosity doubling too fast composition etc.

Active Publication Date: 2015-12-16
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
  • Allophanate composition
  • Allophanate composition

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 Changes in the ratio of X-FLO100:

[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 RheomatRM300 viscometer to be 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....

Embodiment 2

[0181] Example 2: The pot life duration of the formulations varies with the polyisocyanate mixture used Tolonate TM Changes in the ratio of X-FLO100:

[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 RheomatRM300 viscometer to be 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. The measurement of dynamic viscosity utilizes AntonPaarMCR-302 rheometer in oscillati...

Embodiment 3

[0188] Example 3: Open Time and Drying Time of Applied Films Mixed with Polyisocyanate Used Tolonate TM Changes in the ratio of X-FLO100:

[0189] Drying times of films obtained from formulations (A)+(B) applied on glass-type substrates according to standard EN ISO 9117-5 for mixture ratios following the molar ratio between NCO and NH functionalities equal to 1 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 following the difference between NCO and NH functionality The molar ratio between them is equal to 1 to evaluate the mixture ratio.

[0192]

[0193]

[0194] The results show that the drying time varies with the Tolonate in the formulation (B) used TM The ratio of X-FLO100 increases.

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

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Abstract

The invention relates to a composition for producing a coating comprising (a) a compound comprising at least two secondary amino functions and (b) an isocyanate component comprising an allophanate and a polyfunctional isocyanate, and (c) optionally a solvent. The invention also relates to the use of said composition for producing a coating with improved hydrophobicity, and for improving the pot life duration (pot life property) of a formulation for paint or for varnish, or for improving the opening time of a film or a layer resulting from the application of said 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 Applications(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