Patent US4446175A successfully refreshed from Google Patents.
US4446175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coatings formed from isocyanate-functional polymers containing a terminal monosulfide group
Assignee: EIDP Inc
•
Filing: 1981-12-07
•
Granted: 1984-05-01
•
Expires: 2001-12-07
Abstract
Abstract Low molecular weight isocyanate-functional acrylic polymers prepared by direct reaction of the monomers, e.g., 2-isocyanatoethyl methacrylate and butyl acrylate, in the presence of a mercaptan chain-transfer agent are good coating materials applicable to a substrate as by spraying and curable by contact with moisture.
Inventors
- 👤 Darryl W. Brixius
- 👤 John A. Simms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:20
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/34; C08F220/36; C09; C09D; C09D133/00; C09D133/04; C09D133/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
116 words
The process of coating a substrate which comprises (A) applying to a substrate an isocyanate-functional polymer of the number average molecular weight of 500-10,000 formed from at least 10% by weight of isocyanatoalkyl acrylate or isocyanatoalkyl methacrylate, polymerized alone or with a polymerizable comonomer, any polymerizable comonomer being at least one member of the group consisting of alkyl acrylates and methacrylates; styrene, ethylene; vinyl acetate; and vinyl chloride, in the presence of 1-20% by weight, based on the weight of the polymer, of a mercaptan chain-transfer agent, at least 10% by number of the polymer molecules having in terminal position a residue of the mercaptan chain-transfer agent, and (B) curing the applied polymer upon the substrate.
Claim 2
Dependent Claim
116 words
The process of coating a substrate which comprises (A) applying to a substrate an isocyanate-functional polymer of the number average molecular weight of 500-10,000 formed from at least 10% by weight of isocyanatoalkyl acrylate or isocyanatoalkyl methacrylate, polymerized alone or with a polymerizable comonomer, any polymerizable comonomer being at least one member of the group consisting of alkyl acrylates and methacrylates; styrene, ethylene; vinyl acetate; and vinyl chloride, in the presence of 1-20% by weight, based on the weight of the polymer, of a mercaptan chain-transfer agent, at least 10% by number of the polymer molecules having in terminal position a residue of the mercaptan chain-transfer agent, and (B) curing the applied polymer upon the substrate.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the polymer is formed from lauryl or t-dodecyl mercaptan as a chain-transfer agent.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein the polymer is formed from an isocyanatoalkyl acrylate or methacrylate of up to 8 carbons in the alkyl group.
Claim 5
Dependent Claim
18 words
The process of claim 3 wherein the acrylate or methacrylate of the polymer is isocyanatoethyl acrylate or methacrylate.
Claim 6
Dependent Claim
38 words
The process of claim 4 wherein the polymer is formed from at least one polymerizable comonomer of the group consisting of methyl, ethyl, butyl, hexyl, 2-ethylhexyl and lauryl acrylates and methacrylates, styrene, ethylene, vinyl acetate and vinyl chloride.
Claim 7
Dependent Claim
21 words
The process of claim 5 wherein the polymer is formed from the monomers isocyanatoethyl methacrylate, methyl methacrylate, butyl methacrylate and mercaptan.
Claim 8
Dependent Claim
15 words
The process of claim 6 wherein the weight ratio isocyanatoethyl methacrylate/methyl methacrylate/butyl methacrylate/mercaptan is 45.9/22.9/19.4/11.8.
Claim 9
Dependent Claim
18 words
The process of claim 5 wherein the polymer is formed from the monomers isocyanatoethyl methacrylate, styrene and mercaptan.
Claim 10
Dependent Claim
13 words
The process of claim 8 wherein the weight ratio isocyanatoethyl methacrylate/styrene/mercaptan is 45.9/42.6/10.7.
Claim 11
Dependent Claim
19 words
The process of claim 5 wherein the polymer is formed from the monomers isocyanatoethyl methacrylate, butyl acrylate and mercaptan.
Claim 12
Dependent Claim
14 words
The process of claim 10 wherein the weight ratio isocyanatoethyl methacrylate/butyl acrylate/mercaptan is 45.5/41.6/12.8.
Claim 13
Dependent Claim
14 words
The process of claim 10 wherein the isocyanatoethyl methacrylate/butyl acrylate/mercaptan weight ratio is 45.7/45.5/6.7.
Claim 14
Dependent Claim
19 words
The process of claim 5 wherein the polymer is formed from the monomers isocyanatoethyl methacrylate, ethylhexyl acrylate and mercaptan.
Claim 15
Dependent Claim
14 words
The process of claim 13 wherein the weight ratio isocyanatoethyl methacrylate/ethylhexyl acrylate/mercaptan is 45.2/41.9/12.8.
Claim 16
Dependent Claim
21 words
The process of claim 5 wherein the polymer is formed from the monomers isocyanatoethyl methacrylate, methyl methacrylate, n-butyl acrylate and mercaptan.
Claim 17
Dependent Claim
15 words
The process of claim 15 wherein the weight ratio isocyanatoethyl methacrylate/methyl methacrylate/n-butyl acrylate/mercaptan is 28.1/57.6/9.7/2.1.
Claim 18
Dependent Claim
21 words
The process of claim 5 wherein the polymer is formed from the monomers isocyanatoethyl methacrylate, methyl methacrylate, lauryl methacrylate and mercaptan.
Claim 19
Dependent Claim
15 words
The process of claim 17 wherein the weight ratio isocyanatoethyl methacrylate/methyl methacrylate/lauryl methacrylate/mercaptan is 30/60/10/2.1.
Claim 20
Dependent Claim
20 words
The process of claim 5 wherein the polymer is formed from the monomers isocyanatoethyl methacrylate, butyl acrylate, styrene and mercaptan.
Claim 21
Dependent Claim
14 words
The process of claim 19 wherein the weight ratio isocyanatoethyl methacrylate/butyl acrylate/styrene/mercaptan is 53.27/19.6/19.1/7.04.
Claim 22
Dependent Claim
22 words
The process of claim 1, 6, 8, 10, 13, 15, 17 or 19 wherein the polymer is in solution and is pigmented.
Claim 23
Dependent Claim
26 words
The process of claim 1, 6, 8, 10, 13, 15, 17 or 19 wherein the polymer is in solution and applied to a substrate by spraying.
Claim 24
Dependent Claim
27 words
The process of claim 1, 6, 8, 10, 13, 15, 17 or 19 wherein the polymer is applied to a substrate and cured by contact with moisture.
References Cited (Backward Citations)
US2471959A
Cited
US2718516A
Cited
US3028367A
Cited
US3579482A
Cited
US3498943A
Cited
US3632796A
Cited
US3700495A
Cited
US4166882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |