US4045385A
Expired / Lapsed
US
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Free-flowing urea resin compositions with silane or siloxane additive added before hardening
Assignee: Perstorp AB
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Filing: 1975-11-13
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Granted: 1977-08-30
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Expires: 1995-11-13
Abstract
Abstract A process for improving the free-flowing qualities of a urea formaldehyde resin which comprises adding to said resin: A. a polyorganosiloxane having recurring units of the formula X(R).sub.a SiO.sub.3-a/2 wherein X is alkyl, alkylene or a hydrocarbon having a functional group; R is hydrogen, alkyl, alkoxy or aryl; a is a value from 0 to 2, or a hydrolysis product thereof; Or B. a silane of the formula Y--A n --Si(R") b (OR') 3-b Wherein Y is a substituted or unsubstituted amino, carboxyl, glycidyl, mercapto or alkenyl group; A is a bivalent straight or branched-chained alkylene radical which can contain oxygen in the chain; R' is an alkyl or hydroxyalkyl radical; R" is a C 1 -C 4 alkyl radical; n is 0 or 1; and b is 0, 1 or 2, or a hydrolysis product thereof.
Inventors
- 👤 Gerd Klein
- 👤 Kurt Schmoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:06
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/20; C08L61/22; C08L61/24; C08K; C08K5/00; C08K5/54; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
236 words
In the manufacture of a urea-formaldehyde molding composition wherein: A. a liquid urea-formaldehyde resin composition is formed by condensing a urea with a formaldehyde; B. said resin is combined with a filler; and C. to said filler containing urea-formaldehyde resin composition there is added a hardening accelerator to harden said composition to a solid urea-formaldehyde molding composition, the improvement for improving the free-flowing qualities of the resultant solid urea-formaldehyde molding composition when heated at elevated temperatures which comprises introducing into said liquid urea-formaldehyde resin prior to hardening: A. a polyorganosiloxane having recurring units of the formula X(R).sub.a SiO.sub.3-a/ 2 wherein X is alkyl, alkylene or a hydrocarbon radical having a functional group; R is hydrogen, alkyl, alkoxy or aryl; a is a value from 0 to 2; in an amount of 0.05 to 1.6 weight percent based on the weight of the urea in the resin or B. a silane of the formula Y--A.sub.n --Si(R").sub.b (OR').sub.3--b wherein Y is a substituted or unsubstituted amino, carboxyl, glycidyl, mercapto or alkenyl group; A is a bivalent straight or branched-chained alkylene radical which can contain oxygen in the chain; R' is an alkyl or hydroxyl alkyl radical; R" is a C 1-4 alkly radical; n is 0 or 1, and b is 0, 1 or 2; or a hydrolysis product thereof in an amount of 0.8 to 3.0 weight percent based on the weight of urea in said resin.
Claim 2
Dependent Claim
236 words
In the manufacture of a urea-formaldehyde molding composition wherein: A. a liquid urea-formaldehyde resin composition is formed by condensing a urea with a formaldehyde; B. said resin is combined with a filler; and C. to said filler containing urea-formaldehyde resin composition there is added a hardening accelerator to harden said composition to a solid urea-formaldehyde molding composition, the improvement for improving the free-flowing qualities of the resultant solid urea-formaldehyde molding composition when heated at elevated temperatures which comprises introducing into said liquid urea-formaldehyde resin prior to hardening: A. a polyorganosiloxane having recurring units of the formula X(R).sub.a SiO.sub.3-a/ 2 wherein X is alkyl, alkylene or a hydrocarbon radical having a functional group; R is hydrogen, alkyl, alkoxy or aryl; a is a value from 0 to 2; in an amount of 0.05 to 1.6 weight percent based on the weight of the urea in the resin or B. a silane of the formula Y--A.sub.n --Si(R").sub.b (OR').sub.3--b wherein Y is a substituted or unsubstituted amino, carboxyl, glycidyl, mercapto or alkenyl group; A is a bivalent straight or branched-chained alkylene radical which can contain oxygen in the chain; R' is an alkyl or hydroxyl alkyl radical; R" is a C 1-4 alkly radical; n is 0 or 1, and b is 0, 1 or 2; or a hydrolysis product thereof in an amount of 0.8 to 3.0 weight percent based on the weight of urea in said resin.
Claim 3
Dependent Claim
47 words
A process according to claim 1 wherein the silane is added to the urea-formaldehyde resin and Y is an unsubstituted amino, carboxyl, glycidyl, mercapto or C 2-8 alkenyl group; A is a C 1-10 alkylene radical, and R' is a C 1-8 alkyl or hydroxyl alkyl radical
Claim 4
Dependent Claim
17 words
A process according to claim 2 wherein R' is a C 1-4 alkyl or hydroxyl alkyl radical.
Claim 5
Dependent Claim
32 words
A process according to claim 1 wherein the polyorganosiloxane is added to the urea formaldehyde resin and R is a C 1-8 alkyl, C 1-8 alkoxy, C 6-12 aryl radical or hydrogen.
Claim 6
Dependent Claim
37 words
A process according to claim 4 wherein said hydrocarbon radical having a functional group has the formula --CH 2 --(CH 2 ) z --B wherein B is a functional group and z is between 0 and 10.
Claim 7
Dependent Claim
23 words
A process according to claim 5 wherein B is an amino, epoxy, or carboxylic acid ester radical and z is 2 to 4.
Claim 8
Dependent Claim
33 words
A process according to claim 1 wherein a silane is added to said urea formaldehyde resin said silane being selected from the group consisting of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, α-methyl-β-aminoethyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, γ-methacrylohydroxypropyltrimethoxysilane, γ-glycidylhydroxypropyltrimethoxysilane, vinyltriethoxysilane, vinyl-tris-(β-methoxyethoxy)silane.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein said siloxane has an average molecular weight of 1,000 to 10,000.
Claim 10
Dependent Claim
16 words
A process according to claim 1 wherein to the urea-formaldehyde resin there is added a siloxane.
Claim 11
Dependent Claim
36 words
A process according to claim 9 wherein said siloxane is polydimethylsiloxane and it is added to said resin in an amount of 0.2 to 0.8 weight percent, based on the weight of urea in said resin.
Claim 12
Dependent Claim
18 words
A process according to claim 1 wherein a silane or hydrolysis product thereof is added to said resin.
Claim 13
Dependent Claim
24 words
A process according to claim 11 wherein said silane or hydrolysis product thereof is added in an amount of 0.8 to 1.6 weight percent.
Claim 14
Dependent Claim
11 words
A process according to claim 11 wherein the silane is γ-aminopropyltriethoxysilane.
Claim 15
Dependent Claim
11 words
A process according to claim 11 wherein the silane is N-(β-aminoethyl)-γ-aminopropyltriethoxysilane.
Claim 16
Dependent Claim
24 words
A process according to claim 1 wherein additives are added to said liquid urea-formaldehyde resin and the mixture is dried and granulated following hardening.
Claim 17
Dependent Claim
28 words
A process of claim 15 wherein the additives are present in an amount of 30 to 45 percent by weight, based on the weight of the molding composition.
Claim 18
Dependent Claim
18 words
A process according to claim 1 wherein the filler is added in an amount of 30-45 weight percent.
Claim 19
Dependent Claim
13 words
A process according to claim 1 wherein the filler is an organic filler.
Claim 20
Dependent Claim
16 words
A process according to claim 1 wherein said filler containing urea-formaldehyde composition includes a hardener accelerator.
Claim 21
Dependent Claim
157 words
A liquid urea-formaldehyde molding composition containing additives and A. a siloxane having recurring units of the formula X(R).sub.a SiO.sub.3-a/2 wherein X is alkyl, alkylene or a hydrocarbon radical having a functional group; R is hydrogen, alkyl, alkoxy or aryl; a is a value from 0 to 2; in an amount of 0.05 to 1.6 weight percent based on the weight of the urea in the resin or B. a silane of the formula Y--A.sub.n --Si(R").sub.b (OR').sub.3-b wherein Y is a substituted or unsubstituted amino, carboxyl, glycidyl, mercapto or alkenyl group; A is a bivalent straight or branched-chained alkylene radical which can contain oxygen in the chain; R' is an alkyl or hydroxyl alkyl radical; R" is a C 1-4 alkyl radical; n is 0 or 1, and b is 0 or 1 or 2; or a hydrolysis product thereof in an amount of 0.8 to 3.0 weight percent based on the weight of urea in said resin.
Claim 22
Dependent Claim
157 words
A liquid urea-formaldehyde molding composition containing additives and A. a siloxane having recurring units of the formula X(R).sub.a SiO.sub.3-a/2 wherein X is alkyl, alkylene or a hydrocarbon radical having a functional group; R is hydrogen, alkyl, alkoxy or aryl; a is a value from 0 to 2; in an amount of 0.05 to 1.6 weight percent based on the weight of the urea in the resin or B. a silane of the formula Y--A.sub.n --Si(R").sub.b (OR').sub.3-b wherein Y is a substituted or unsubstituted amino, carboxyl, glycidyl, mercapto or alkenyl group; A is a bivalent straight or branched-chained alkylene radical which can contain oxygen in the chain; R' is an alkyl or hydroxyl alkyl radical; R" is a C 1-4 alkyl radical; n is 0 or 1, and b is 0 or 1 or 2; or a hydrolysis product thereof in an amount of 0.8 to 3.0 weight percent based on the weight of urea in said resin.
Claim 23
Dependent Claim
21 words
A molding composition according to claim 20 wherein the additives are present in an amount of 30 to 45 weight percent.
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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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |