GB2105732A - Paint composition - Google Patents

Paint composition Download PDF

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Publication number
GB2105732A
GB2105732A GB08127376A GB8127376A GB2105732A GB 2105732 A GB2105732 A GB 2105732A GB 08127376 A GB08127376 A GB 08127376A GB 8127376 A GB8127376 A GB 8127376A GB 2105732 A GB2105732 A GB 2105732A
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GB
United Kingdom
Prior art keywords
paint
isocyanate
polymer
primer according
paint primer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08127376A
Other versions
GB2105732B (en
Inventor
Peter Joseph Huby Watson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DEBORAH COATINGS
Original Assignee
DEBORAH COATINGS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DEBORAH COATINGS filed Critical DEBORAH COATINGS
Priority to GB08127376A priority Critical patent/GB2105732B/en
Publication of GB2105732A publication Critical patent/GB2105732A/en
Application granted granted Critical
Publication of GB2105732B publication Critical patent/GB2105732B/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/02—Halogenated hydrocarbons
    • C08K5/03—Halogenated hydrocarbons aromatic, e.g. C6H5-CH2-Cl
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Paints Or Removers (AREA)

Abstract

A paint primer which can be used as a "tie coat" or "adhesion promoter" over weathered galvanising consists of an isocyanate based, preferably 4,4'-diisocyanato diphenyl methane based, atmospheric moisture curing polymer which is added to a silicate filler, preferably consisting of magnesium aluminium silicate, dispersed in a solvent, preferably comprising xylene and 2-ethoxy ethyl acetate. The primer may be pigmented with an inert material such as red iron oxide and the polymer may include a modified castor oil polyol.

Description

SPECIFICATION Paint composition This invention relates to paint compositions and is particularly concerned with primers.
The invention aims to provide a primer which can be used as a "tie coat" or "adhesion promoter" over weathered galvanising particularly under materials with high cohesive strength, such as elastomeric urethanes.
According to the invention, there is provided a paint primer comprising an isocyanate based, atmospheric moisture curing polymer which is added to a silicate filler dispersed in a solvent.
Preferably, the primer comprises 4,4' diisocyanato diphenyl methane based, atmospheric moisture curing polymer filled with magnesium aluminium silicate and may also contain a pigment. The pigment volume concentration is desirably in the range of 1 8- 28%, preferably 25%. Volume solids is desirably in the range of 4050%, preferably 45%. The material may be pigmented with an inert material, e.g. red iron oxide.
The polymer may take the form of commercial 4,4' diisocyanato diphenyl methane based moisture curing polymer having a reactive isocyanate content of approximately 16%.
Alternatively, the polymer may be made in situ by the addition of 4,4' diisocyanato diphenyl methane to a polyol made from castor oil having a hydroxyl content of approximately 5%. The isocyanate curing agent is added in excess of the stoichiometric rate, the ratio being in the range of 1.5-2.5 isocyanate groups per hydroxyl group.
The preferred ratio is 2 isocyanate groups per hydroxyl group.
The primer according to the invention is manufactured by dispersing the filler and pigment material(s) in a suitable solvent such as, for example, xylene and 2-ethoxy ethyl acetate.
When the polymer is to be made in situ, the polyol may be added to this slurry. The isocyanate component is added immediately prior to use and the resultant mixture is useable for up to four hours.
Preferred compositions of primers according to the invention are given in the following examples: Example 1 Constituent % by wt.
Red iron oxide 3 Magnesium aluminium silicate 27 2-ethoxy ethyl acetate 6 Xylene 29 4,4' diisocyanato diphenyl methane based pre-polymer, 16% isocyanate content 35 100 Example 2 Constituent % by wt.
Red iron oxide 3 Magnesium aluminium silicate 27 2-ethoxy ethyl acetate 6 Xylene 29 4,4' diisocyanato diphenyl methane 15.5 Modified castor oil polyol (approx. 5% hydroxyl content) 1 9.5 100 It will be found that primer compositions according to either of the above examples will achieve the aim of the invention of providing a primer which is suitable for use as a "tie coat" or "adhesion promotor" over weathered galvanising.
The primers are particularly useful under materials with high cohesive strength such as elastomeric urethanes and can be used, in particular, as adhesion promoters on steel under elastomeric urethanes.
It should be noted that the invention is not restricted to the above examples but that variations may be made to the constituents without departing from the scope of the invention.
Claims (Filed on 17 June 1982) 1. A paint primer comprising an isocyanate based, atmospheric moisture curing polymer which is added to a silicate filler dispersed in a solvent.
2. A paint primer according to claim 1, wherein the polymer is 4,4' diisocyanato diphenyl methane based and filled with magnesium aluminium silicate.
3. A paint primer according to claim 2, wherein the polymer has a reactive isocyanate content of approximately 1 6%.
4. A paint primer according to claim 1, wherein the polymer consists of 4,4' diisocyanato diphenyl methane which is added to a polyol made from castor oil having a hydroxyl content of approximately 5%.
5. A paint primer according to claim 4, wherein the isocyanate curing agent is added in excess of the stoichiometric rate, the ratio being in the range of 1.5-2.5. isocyanate~groups per hydroxyl group.
6. A paint primer according to claim 5, wherein the ratio is 2 isocyanate groups per hydroxyl group.
7. A paint primer according to any preceding claim, which further includes a pigment.
8. A paint primer according to claim 7, wherein the pigment volume concentration is in the range of 1 8-28%, preferably 25%.
9. A paint primer according to claim 7 or claim 8, wherein the pigment consists of an inert material.
10. A paint primer according to any one of
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (14)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Paint composition This invention relates to paint compositions and is particularly concerned with primers. The invention aims to provide a primer which can be used as a "tie coat" or "adhesion promoter" over weathered galvanising particularly under materials with high cohesive strength, such as elastomeric urethanes. According to the invention, there is provided a paint primer comprising an isocyanate based, atmospheric moisture curing polymer which is added to a silicate filler dispersed in a solvent. Preferably, the primer comprises 4,4' diisocyanato diphenyl methane based, atmospheric moisture curing polymer filled with magnesium aluminium silicate and may also contain a pigment. The pigment volume concentration is desirably in the range of 1 8- 28%, preferably 25%. Volume solids is desirably in the range of 4050%, preferably 45%. The material may be pigmented with an inert material, e.g. red iron oxide. The polymer may take the form of commercial 4,4' diisocyanato diphenyl methane based moisture curing polymer having a reactive isocyanate content of approximately 16%. Alternatively, the polymer may be made in situ by the addition of 4,4' diisocyanato diphenyl methane to a polyol made from castor oil having a hydroxyl content of approximately 5%. The isocyanate curing agent is added in excess of the stoichiometric rate, the ratio being in the range of 1.5-2.5 isocyanate groups per hydroxyl group. The preferred ratio is 2 isocyanate groups per hydroxyl group. The primer according to the invention is manufactured by dispersing the filler and pigment material(s) in a suitable solvent such as, for example, xylene and 2-ethoxy ethyl acetate. When the polymer is to be made in situ, the polyol may be added to this slurry. The isocyanate component is added immediately prior to use and the resultant mixture is useable for up to four hours. Preferred compositions of primers according to the invention are given in the following examples: Example 1 Constituent % by wt. Red iron oxide 3 Magnesium aluminium silicate 27 2-ethoxy ethyl acetate 6 Xylene 29 4,4' diisocyanato diphenyl methane based pre-polymer, 16% isocyanate content 35 100 Example 2 Constituent % by wt. Red iron oxide 3 Magnesium aluminium silicate 27 2-ethoxy ethyl acetate 6 Xylene 29 4,4' diisocyanato diphenyl methane 15.5 Modified castor oil polyol (approx. 5% hydroxyl content) 1 9.5 100 It will be found that primer compositions according to either of the above examples will achieve the aim of the invention of providing a primer which is suitable for use as a "tie coat" or "adhesion promotor" over weathered galvanising. The primers are particularly useful under materials with high cohesive strength such as elastomeric urethanes and can be used, in particular, as adhesion promoters on steel under elastomeric urethanes. It should be noted that the invention is not restricted to the above examples but that variations may be made to the constituents without departing from the scope of the invention. Claims (Filed on 17 June 1982)
1. A paint primer comprising an isocyanate based, atmospheric moisture curing polymer which is added to a silicate filler dispersed in a solvent.
2. A paint primer according to claim 1, wherein the polymer is 4,4' diisocyanato diphenyl methane based and filled with magnesium aluminium silicate.
3. A paint primer according to claim 2, wherein the polymer has a reactive isocyanate content of approximately 1 6%.
4. A paint primer according to claim 1, wherein the polymer consists of 4,4' diisocyanato diphenyl methane which is added to a polyol made from castor oil having a hydroxyl content of approximately 5%.
5. A paint primer according to claim 4, wherein the isocyanate curing agent is added in excess of the stoichiometric rate, the ratio being in the range of 1.5-2.5. isocyanate~groups per hydroxyl group.
6. A paint primer according to claim 5, wherein the ratio is 2 isocyanate groups per hydroxyl group.
7. A paint primer according to any preceding claim, which further includes a pigment.
8. A paint primer according to claim 7, wherein the pigment volume concentration is in the range of 1 8-28%, preferably 25%.
9. A paint primer according to claim 7 or claim 8, wherein the pigment consists of an inert material.
10. A paint primer according to any one of claims 7 to 9, wherein the pigment consists of red iron oxide.
11. A paint primer according to any preceding claim, wherein volume solids are in the range of 4050%, preferably 45%.
12. A paint primer according to any one of claims 7 to 10, wherein filler and pigment materials are dispersed in a solvent.
13. A paint primer according to claim 12, wherein the solvent comprises xylene and 2ethoxy ethyl acetate.
14. A paint primer according to claim 12 or claim 13, wherein a polyol is added to the dispersion.
1 5. A paint primer according to any one of claims 1 2 to 14, wherein an isocyanate is added immediately prior to use of said primer.
1 6. A paint primer substantially as described herein with reference to the examples.
GB08127376A 1981-09-10 1981-09-10 Paint composition Expired GB2105732B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08127376A GB2105732B (en) 1981-09-10 1981-09-10 Paint composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08127376A GB2105732B (en) 1981-09-10 1981-09-10 Paint composition

Publications (2)

Publication Number Publication Date
GB2105732A true GB2105732A (en) 1983-03-30
GB2105732B GB2105732B (en) 1984-10-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB08127376A Expired GB2105732B (en) 1981-09-10 1981-09-10 Paint composition

Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3339682A1 (en) * 1983-11-02 1985-05-15 BGB-Gesellschaft Reinmar John, Rainer-Leo Meyer & Olga Meyer geb. Klöpfer, 7580 Bühl COATING MEASUREMENT FOR STEEL AND IRON, THE USE THEREOF, AND METHOD FOR PRODUCING A PROTECTIVE COATING
FR2823118A1 (en) * 2001-04-04 2002-10-11 Lavipharm Lab Inc NOVEL TOPIC-USE FILMOGENIC COMPOSITION AND USE THEREOF FOR DELIVERING ACTIVE AGENTS

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3339682A1 (en) * 1983-11-02 1985-05-15 BGB-Gesellschaft Reinmar John, Rainer-Leo Meyer & Olga Meyer geb. Klöpfer, 7580 Bühl COATING MEASUREMENT FOR STEEL AND IRON, THE USE THEREOF, AND METHOD FOR PRODUCING A PROTECTIVE COATING
EP0143360A2 (en) * 1983-11-02 1985-06-05 Kleinert, Viktor Coating mass for steel and iron, its use and process for obtaining a protective coating
EP0143360A3 (en) * 1983-11-02 1985-07-03 Bgb-Gesellschaft Reinmar John Rainer-Leo Meyer U. Olga Meyer Geb. Klopfer
FR2823118A1 (en) * 2001-04-04 2002-10-11 Lavipharm Lab Inc NOVEL TOPIC-USE FILMOGENIC COMPOSITION AND USE THEREOF FOR DELIVERING ACTIVE AGENTS
WO2002081536A1 (en) * 2001-04-04 2002-10-17 Lavipharm Laboratories, Inc. Film-forming composition for topical use and use thereof for delivering active agents
US6797262B2 (en) 2001-04-04 2004-09-28 O'halloran David Film forming compositions for topical use and delivery of active ingredients

Also Published As

Publication number Publication date
GB2105732B (en) 1984-10-03

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930910