US4065415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-based coatings with improved sagging and popping characteristics
Assignee: PPG Industries Inc
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Filing: 1975-10-01
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Granted: 1977-12-27
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Expires: 1995-10-01
Abstract
Abstract This invention relates to a water-based coating composition in which solvent or water popping and sagging are eliminated or substantially reduced. The composition comprises a thermosetting, film-forming organic binder dispersed in an aqueous medium containing from 60 to 100 parts by weight of water and 0 to 40 parts by weight of a volatile organic solvent. The organic binder is formulated from (a) and acid-containing interpolymer adapted to be dissolved or dispersed in water with the acid of a base; (b) a water-soluble or water-dispersible polyether polyol or polyester polyol having a molecular weight of at least 300 and (c) a water-soluble or water-dispersible aldehyde condensation resin. The interpolymer consists essentially of a carboxylic acid amide in units of the structure: ##STR1## wherein R' is hydrogen or lower alkyl and R is lower alkyl; an alpha, beta-ethylenically unsaturated carboxylic acid; and at least one other monomer containing a CH 2 =CH< group. In addition to the elimination of, or substantial reduction in solvent or water popping and sagging of the composition, films formed from the compositions exhibit excellent properties, such as hardness, water resistance, salt spray resistance and stain resistance.
Inventors
- 👤 Roger M. Christenson
- 👤 Clarence E. Evjen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:09
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/24
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
76 words
A water-based coating composition having reduced solvent popping, water-popping and sagging characteristics comprising a thermosetting, film-forming organic binder dispersed in an aqueous medium containing at least 60 percent by weight of water, said organic binder consisting essentially of: A. an interpolymer consisting essentially of: 1. from about 10 percent to about 40 percent of a carboxylic acid amide in units of the structure: ##STR4## wherein R' is hydrogen or lower alkyl and R is lower alkyl;
Claim 2
Dependent Claim
76 words
A water-based coating composition having reduced solvent popping, water-popping and sagging characteristics comprising a thermosetting, film-forming organic binder dispersed in an aqueous medium containing at least 60 percent by weight of water, said organic binder consisting essentially of: A. an interpolymer consisting essentially of: 1. from about 10 percent to about 40 percent of a carboxylic acid amide in units of the structure: ##STR4## wherein R' is hydrogen or lower alkyl and R is lower alkyl;
Claim 3
Dependent Claim
102 words
from about 5 to about 20 percent of units of an alpha, beta-ethylenically unsaturated carboxylic acid, and 3. units of at least one other ethylenically unsaturated monomer containing a CH 2 = C< group, wherein said interpolymer is solubilized by neutralizing at least part of the carboxylic acid groups with a base; B. from about 5 percent to about 40 percent by weight of binder solids of a non-volatile water-soluble or water-dispersible polyether polyol or polyester polyol having a molecular weight of at least 300; and C. from about 5 percent to about 40 percent by weight of binder solids of a
Claim 4
Dependent Claim
102 words
from about 5 to about 20 percent of units of an alpha, beta-ethylenically unsaturated carboxylic acid, and 3. units of at least one other ethylenically unsaturated monomer containing a CH 2 = C< group, wherein said interpolymer is solubilized by neutralizing at least part of the carboxylic acid groups with a base; B. from about 5 percent to about 40 percent by weight of binder solids of a non-volatile water-soluble or water-dispersible polyether polyol or polyester polyol having a molecular weight of at least 300; and C. from about 5 percent to about 40 percent by weight of binder solids of a
Claim 5
Dependent Claim
22 words
water soluble or water-dispersible aldehyde condensation resin. 2. The water-based coating composition of claim 1 wherein said amide is N-(butoxymethyl)acrylamide or N-(butoxymethyl)methacrylamide.
Claim 6
Dependent Claim
20 words
The water-based coating composition of claim 1 wherein said alpha, beta-ethylenically unsaturated carboxylic acid is acrylic acid or methacrylic acid.
Claim 7
Dependent Claim
25 words
The water-based coating composition of claim 1 wherein the other monomer containing a CH 2 =C< group is a mixture of hardening and flexibilizing monomers.
Claim 8
Dependent Claim
26 words
The water-based coating composition of claim 4 wherein the hardening monomer is styrene, vinyl toluene or an alkyl methacrylate having from 1 to 4 carbon atoms.
Claim 9
Dependent Claim
56 words
The water-based coating composition of claim 4 wherein the flexibilizing monomer is one or more alkyl or substituted alkyl esters of acrylic or methacrylic acid, wherein the alkyl or substituted alkyl groups have 1 to 13 carbon atoms in the case of acrylic esters and 5 to 16 carbon atoms in the case of methacrylic esters.
Claim 10
Dependent Claim
14 words
The water-based coating composition of claim 1 wherein said base is a monomeric amine.
Claim 11
Dependent Claim
12 words
The water-based coating composition of claim 1 wherein said base is dimethylethanolamine.
Claim 12
Dependent Claim
16 words
The water-base coating composition of claim 1 wherein said polyether polyol is a sucrose polyether polyol.
Claim 13
Dependent Claim
14 words
The water-based coating composition of claim 1 wherein said aldehyde condensation resin is hexa(methoxymethyl)melamine.
Claim 14
Dependent Claim
43 words
The water-based coating composition of claim 1 wherein said aldehyde condensation resin is a methylolphenol ether having the structure: ##STR5## wherein n is a integer of from 1 to 3 and R is an unsaturated aliphatic group or a halogen-substituted unsaturated aliphatic group.
Claim 15
Dependent Claim
26 words
The water-based coating composition of claim 1 wherein said aldehyde condensation resin comprises a mixture of a methylolated melamine formaldehyde resin and a methylol phenol ether.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |