US3843591A
Expired / Lapsed
US
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Reinforced polyamide compositions
Assignee: Monsanto Co
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Filing: 1973-04-12
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Granted: 1974-10-22
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Expires: 1993-04-12
Abstract
Abstract Condensation polyamide compositions reinforced with from about 2 to about 55 percent by volume small particle size crystalline filler and an organosilane coupling agent are described. The compositions have improved mechanical properties such as concurrent high modulus and high multiaxial impact strength. Also disclosed are processes for preparing the above compositions as well as articles of manufacture.
Inventors
- 👤 R Hedrick
- 👤 H Goedecke
- 👤 W Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:14
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04; C08K9/06
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
124 words
A REINFORCED POLYAMIDE COMPOSITION COMPRISING: A. A POLYAMIDE MATRIX FORMED BY THE CONDENSATION POLYMERIZATION OF A POLYCARBOXYLIC ACID AND A POLYAMIDE HAVING AN INTRINSIC VISCOSITY OF AT LEAST ABOUT 1.0 AND A MAXIMUM MU/MN VALUE OF ABOUT 2.5, B. FROM ABOUT 2 TO ABOUT 55 PERCENT BY VOLUME OF THE TOTAL COMPOSITION OF A PARTICULATE CRYSTALLINE INORGANIC FILLER MATERIAL HAVING A MOH''S HARDNESS OF AT LEAST ABOUT 4 AND PARTICLE SIZE SUCH THAT ABOUT 100 PERCENT OF THE PARTICLES HAVE A PARTICLE SIZE OF ABOUT 40 MICRONS OR LESS AND AT LEAST ABOUT 95 PERCENT BY WEIGHT OF THE PARTICLES HAVE A PARTICLE SIZE OF ABOUT 15 MICRONS OR LESS, SAID FILLER MATERIAL HAVING BEEN TREATED WITH AN ORGANOSILANE COUPLING AGENT OF THE FORMULA:
Claim 2
Dependent Claim
124 words
A REINFORCED POLYAMIDE COMPOSITION COMPRISING: A. A POLYAMIDE MATRIX FORMED BY THE CONDENSATION POLYMERIZATION OF A POLYCARBOXYLIC ACID AND A POLYAMIDE HAVING AN INTRINSIC VISCOSITY OF AT LEAST ABOUT 1.0 AND A MAXIMUM MU/MN VALUE OF ABOUT 2.5, B. FROM ABOUT 2 TO ABOUT 55 PERCENT BY VOLUME OF THE TOTAL COMPOSITION OF A PARTICULATE CRYSTALLINE INORGANIC FILLER MATERIAL HAVING A MOH''S HARDNESS OF AT LEAST ABOUT 4 AND PARTICLE SIZE SUCH THAT ABOUT 100 PERCENT OF THE PARTICLES HAVE A PARTICLE SIZE OF ABOUT 40 MICRONS OR LESS AND AT LEAST ABOUT 95 PERCENT BY WEIGHT OF THE PARTICLES HAVE A PARTICLE SIZE OF ABOUT 15 MICRONS OR LESS, SAID FILLER MATERIAL HAVING BEEN TREATED WITH AN ORGANOSILANE COUPLING AGENT OF THE FORMULA:
Claim 3
Dependent Claim
22 words
A composition according to claim 1 wherein said polyamide matrix is a copolymer containing at least 50 percent by weight condensation polyamide.
Claim 4
Dependent Claim
22 words
A composition according to claim 1 wherein said polyamide matrix is a polyblend containing at least 50 percent by weight condensation polyamide.
Claim 5
Dependent Claim
21 words
A composition according to claim 1 wherein said polyamide matrix is a condensation product of a dicarboxylic acid and a diamine.
Claim 6
Dependent Claim
19 words
A composition according to claim 1 wherein said polyamide matrix has an intrinsic viscosity of at least about 1.2.
Claim 7
Dependent Claim
19 words
A composition according to claim 1 wherein said polyamide matrix has an intrinsic viscositY of at least about 1.3.
Claim 8
Dependent Claim
18 words
A composition according to claim 1 wherein said polyamide matrix has a maximum Mw/Mn ratio of about 2.2.
Claim 9
Dependent Claim
20 words
A composition according to claim 1 wherein said polyamide matrix has a Mw/Mn ratio from about 1.8 to about 2.1.
Claim 10
Dependent Claim
20 words
A composition according to claim 1 wherein said filler has a maximum particle size of about 30 microns or less.
Claim 11
Dependent Claim
20 words
A composition according to claim 1 wherein said filler has an average particle size of about 10 microns or less.
Claim 12
Dependent Claim
27 words
A composition according to claim 1 wherein said filler is present in an amount from about 2 to about 25 percent by volume of the total composition.
Claim 13
Dependent Claim
27 words
A composition according to claim 1 wherein said filler is present in an amount from about 10 to about 25 percent by volume of the total composition.
Claim 14
Dependent Claim
42 words
A composition according to claim 1 wherein X is a halogen or alkoxy group, Z is an amino group, R is an alkylene group having from 2 to about 18 carbon atoms, a is 3, b is zero and c is 1.
Claim 15
Dependent Claim
17 words
A composition according to claim 1 wherein said polyamide matrix is a crosslinked polyamide insoluble in m-cresol.
Claim 16
Dependent Claim
32 words
A composition according to claim 1 wherein said organosilane coupling agent is used in quantities of from about 0.1 to about 4 percent by weight, based on the weight of said filler.
Claim 17
Dependent Claim
139 words
A reinforced polyamide composition comprising: a. a polyamide matrix formed by the condensation polymerization of polycarboxylic acid and a polyamine having an intrinsic viscosity of at least about 1.2 and a maximum Mw/Mn ratio of about 2.2, b. from about 2 to about 55 percent by volume based on the total composition of a crystalline inorganic filler wherein about 100 percent of the particles have a particle size of about 30 microns or less and about 95 percent by weight of the particles have a particle size of about 10 microns or less, said filler material having been treated with an organosilane coupling agent of the formula (A)3-Si-R-B where A is a halogen or an alkoxy group, R is an alkylene group having from 2 to about 18 carbon atoms, and B is a primary or secondary amino group.
Claim 18
Dependent Claim
139 words
A reinforced polyamide composition comprising: a. a polyamide matrix formed by the condensation polymerization of polycarboxylic acid and a polyamine having an intrinsic viscosity of at least about 1.2 and a maximum Mw/Mn ratio of about 2.2, b. from about 2 to about 55 percent by volume based on the total composition of a crystalline inorganic filler wherein about 100 percent of the particles have a particle size of about 30 microns or less and about 95 percent by weight of the particles have a particle size of about 10 microns or less, said filler material having been treated with an organosilane coupling agent of the formula (A)3-Si-R-B where A is a halogen or an alkoxy group, R is an alkylene group having from 2 to about 18 carbon atoms, and B is a primary or secondary amino group.
Claim 19
Dependent Claim
22 words
A composition according to claim 16 wherein said condensation polyamide matrix is a copolymer containing at least 90 percent by weight polyamide.
Claim 20
Dependent Claim
22 words
A composition according to claim 16 wherein said condensation polyamide matrix is a polyblend containing at least 90 percent by weight polyamide.
Claim 21
Dependent Claim
22 words
A composition according to claim 16 wherein said condensation polyamide matrix is a condensation product of a dicarboxylic acid and a diamine.
Claim 22
Dependent Claim
14 words
A composition according to claim 16 wherein said condensation polyamide matrix is nylon 6,6.
Claim 23
Dependent Claim
18 words
A composition according to claim 16 wherein said condensation polyamide matrix is a crosslinked polyamide insoluble in m-cresol.
Claim 24
Dependent Claim
27 words
A composition according to claim 16 wherein said filler is used in quantities of from about 10 to about 25 percent by volume of the total composition.
Claim 25
Dependent Claim
27 words
A composition according to claim 16 wherein said filler is used in quantities of from about 2 to about 10 percent by volume of the total composition.
Claim 26
Dependent Claim
20 words
A composition according to claim 16 wherein said filler has an average particle size of less than about 5 microns.
Claim 27
Dependent Claim
26 words
A composition according to claim 16 wherein said organosliane coupling agent is a gamma -aminopropyl trialkoxysilane where the alkoxy groups have up to eight carbon atoms.
Claim 28
Dependent Claim
17 words
A composition according to claim 16 wherein the multiaxial impact strength is greater than 10 foot pounds.
Claim 29
Dependent Claim
66 words
A composition according to claim 16 wherein said polyamide matrix is nylon 6,6, said filler has an average particle size of less than about 5 microns, and said organosilane coupling agent is gamma -amiNopropyl trialkoxysilane where the alkoxy groups have up to eight carbon atoms, said organosilane coupling agent being used in quantities of from about 0.25 to about 2 percent by weight of said filler.
Claim 30
Dependent Claim
67 words
A process for preparing a reinforced condensation polyamide composition comprising a. treating a particulate crystalline inorganic filler material having a Moh''s hardness of at least about 4 and a particle size such that about 100 percent of the particles are about 40 microns or less and at least about 95 percent of the particles are 15 microns or less, with an organosilane coupling agent of the formula:
Claim 31
Dependent Claim
67 words
A process for preparing a reinforced condensation polyamide composition comprising a. treating a particulate crystalline inorganic filler material having a Moh''s hardness of at least about 4 and a particle size such that about 100 percent of the particles are about 40 microns or less and at least about 95 percent of the particles are 15 microns or less, with an organosilane coupling agent of the formula:
Claim 32
Dependent Claim
20 words
A process according to claim 28 wherein said filler has an average particle size of about 10 microns or less.
Claim 33
Dependent Claim
25 words
A process according to claim 28 wherein said organosilane coupling agent is gamma -aminopropyl trialkoxysilane where the alkoxy groups have up to 8 carbon atoms.
Claim 34
Dependent Claim
41 words
A process according to claim 28 wherein said filler has an average particle size of less than about 5 microns and wherein said organosilane coupling agent is gamma -aminopropyl trialkoxy silane where the alkoxy groups have up to eight carbon atoms.
Claim 35
Dependent Claim
21 words
A process according to claim 28 wherein said polyamide is nylon 6,6 having an intrinsic viscosity of at least about 1.2.
Claim 36
Dependent Claim
12 words
A process according to claim 28 wherein said composition is injection molded.
Claim 37
Dependent Claim
29 words
A process according to claim 28 wherein said filler is incorporated into said polyamide by placing the filler in a polyamide solution and precipitating said polymide from said solution.
Claim 38
Dependent Claim
116 words
A reinforced polyamide article comprising a polyamide formed by the condensation polymerization of a polycarboxylic acid and a polyamide having an intrinsic viscosity of at least about 1.0 and a Mw/Mn ratio of at least about 2.5, and from about 2 to about 55 percent by volume based on the total composition of a particulate crystalline inorganic filler material having a Moh''s hardness of at least about 4 and a particle size such that about 100 percent of the filler particles are about 40 microns or less and at least about 95 percent of the filler particles are about 15 microns or less, said filler having been treated with an organosilane coupling agent of the formula:
Claim 39
Dependent Claim
116 words
A reinforced polyamide article comprising a polyamide formed by the condensation polymerization of a polycarboxylic acid and a polyamide having an intrinsic viscosity of at least about 1.0 and a Mw/Mn ratio of at least about 2.5, and from about 2 to about 55 percent by volume based on the total composition of a particulate crystalline inorganic filler material having a Moh''s hardness of at least about 4 and a particle size such that about 100 percent of the filler particles are about 40 microns or less and at least about 95 percent of the filler particles are about 15 microns or less, said filler having been treated with an organosilane coupling agent of the formula:
Claim 40
Dependent Claim
13 words
A composition according to claim 1 wherein said polyamide matrix is nylon 6,6.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |