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US4647630A
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Process for the preparation of highly viscous or heat distortion-resistant polyamide which is at least partially crosslinked with functional silane
Assignee: Uhde Inventa Fischer AG
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Filing: 1983-11-07
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Granted: 1987-03-03
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Expires: 2003-11-07
Abstract
Abstract Highly viscous or heat distortion-resistant at least partially crosslinked polyamides are disclosed along with the process for making them. The process comprises reacting, under anhydrous conditions, a polyamide melt with a silane of the following formula <IMAGE> wherein n=0, 1, or 2, Z is individually an organic radical which may, together with other Z groups and the silicon atom, form rings, A is individually a moisture hydrolyzable radical which may, together with other A groups and the silicon atom, form rings, and Y is an organic radical containing a functional group which is capable of reacting with at least one of an amide, amino and carboxyl group of the polyamide to form a covalent bond, and then bringing the reaction product into contact with moisture to form the at least partially crosslinked polyamides.
Inventors
- 👤 Eduard Schmid
- 👤 Manfred Hoppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:53
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48; C08K; C08K5/00; C08K5/54
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
125 words
A process for the preparation of an at least partially crosslinked polycarbonamide comprising reacting an anhydrous polycarbonamide melt with a silane in a reaction mixture to form a reaction product, said silane having Formula I ##STR16## wherein n is 0, 1 or 2; each Z is individually an inert organic radical or, together with the silicon atom, forms at least one ring; Y is an organic radical containing a functional group which is reactive with an amino group of said melt to form a covalent bond; and each A is individually a radical which is hydrolyzable in the presence of moisture or, together with the silicon atom, forms at least one ring; and contacting said reaction product with moisture to form said partially crosslinked polyamide.
Claim 2
Dependent Claim
125 words
A process for the preparation of an at least partially crosslinked polycarbonamide comprising reacting an anhydrous polycarbonamide melt with a silane in a reaction mixture to form a reaction product, said silane having Formula I ##STR16## wherein n is 0, 1 or 2; each Z is individually an inert organic radical or, together with the silicon atom, forms at least one ring; Y is an organic radical containing a functional group which is reactive with an amino group of said melt to form a covalent bond; and each A is individually a radical which is hydrolyzable in the presence of moisture or, together with the silicon atom, forms at least one ring; and contacting said reaction product with moisture to form said partially crosslinked polyamide.
Claim 3
Dependent Claim
24 words
The process of claim 1 comprising reacting said melt with said silane, solidifying said reaction product to form a solid and comminuting said solid.
Claim 4
Dependent Claim
29 words
The process of claim 1 comprising reacting said polycarbonamide and said silane and processing said reaction product directly into a shaped article before contacting said reaction product with moisture.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein said functional group is an epoxide, isocyanate, activated vinyl, aromatic carboxylic ester or carboxylic acid anhydride.
Claim 6
Dependent Claim
25 words
The process of claim 1 wherein said silane is applied to polycarbonamide granules in the absence of moisture followed by melting and kneading said granules.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein said silane is mixed into said polycarbonamide melt in liquid form.
Claim 8
Dependent Claim
28 words
The process of claim 1 wherein said silane is dissolved in an inert, anhydrous solvent to form a solution, and said solution is introduced into said polycarbonamide melt.
Claim 9
Dependent Claim
35 words
The process of claim 1 wherein an amount of less than 1% by weight, based on said polycarbonamide melt, of water is introduced into said reaction product or at any subsequent stage of said process.
Claim 10
Dependent Claim
39 words
The process of claim 1 further comprising discharging said reaction product through a water bath and drying the discharge after sufficient contact with said water to form --Si--O--Si-- bridges, and then processing said dry discharge into a desired shape.
Claim 11
Dependent Claim
30 words
The process of claim 1 wherein said silane is present in said reaction mixture in an amount of about 0.05 to about 10% by weight relative to said polycarbonamide melt.
Claim 12
Dependent Claim
35 words
The process of claim 1 wherein said silane is present in said reaction mixture in a stoichiometric amount relative to at least one of reactive chain members and reactive terminal groups in said polycarbonamide melt.
Claim 13
Dependent Claim
44 words
The process of claim 11 wherein said silane is first absorbed on a pulverulent carrier material, and said material, in the absence of moisture, is applied to premelt polycarbonamide granules or is introduced simultaneously with said polycarbonamide granules while said granules are being melted.
Claim 14
Dependent Claim
17 words
The process of claim 3 wherein said article is exposed to air, said air supplying said moisture.
Claim 15
Dependent Claim
27 words
The process of claim 1 wherein said silane is present in said reaction mixture in an amount of at least 0.05% by weight based on said polycarbonamide.
Claim 16
Dependent Claim
30 words
The process of claim 1 wherein said silane is present in said reaction mixture in an effective amount up to a maximum of 10% by weight based on said polycarbonamide.
Claim 17
Dependent Claim
30 words
The process of claim 14 wherein said silane is present in said reaction mixture in in an amount of about 0.1 to about 4.0% by weight based on said polycarbonamide.
Claim 18
Dependent Claim
46 words
The process of claim 1 wherein Z is a aliphatic, cycloaliphatic, arylaliphatic, or aromatic group; A is halogen, oximino, acyloxy, or --OR wherein R is an inert radical; and said functional group of Y is epoxide, isocyanate, activated vinyl, aromatic carboxylic ester, or carboxylic acid anhydride.
Claim 19
Dependent Claim
39 words
The process of claim 1 wherein Z is methyl, ethyl, or phenyl; A is chloride, bromide, acetoxy, propionoxy, or --OR wherein R is a aliphatic, cycloaliphatic, arylaliphatic or an aromatic group having either oxygen atoms; and Y is ##STR17##
Claim 20
Dependent Claim
26 words
The process of claim 4 wherein said functional group is a 1,2-epoxide, an isocyanate, an activated vinyl, an aromatic carboxylic ester, or a carboxylic acid anhydryde.
Claim 21
Dependent Claim
23 words
The process of claim 1 wherein said melt is of a polycarbonamide containing --NH-- groups reactive with the functional group of the silane.
Claim 22
Dependent Claim
55 words
The process of claim 1 wherein said melt is selected from (a) an aliphatic homo or polycarbonamide (b) an aliphatic-aromatic homo- or copolycarbonamide (c) an amorphous polycarbonamide (d) an elastomeric polycarbonamide (e) a blend of polycarbonamides or (f) a polycarbonamide blend with another thermoplastic polymer comprising at least one of (a), (b), (c), or (d).
Claim 23
Dependent Claim
13 words
A partially or fully crosslinked polycarbonamide produced by the process of claim 1.
References Cited (Backward Citations)
US4319007A
Cited
US4429082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |