US4537929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High impact nylon composition
Assignee: AKZO PLASTICS BV A DUTCH CORP
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Filing: 1984-01-20
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Granted: 1985-08-27
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Expires: 2004-01-20
Abstract
Abstract High impact nylon molding compounds are provided by maleating an ethylene-propylene copolymer at an elevated temperature in the presence of an organic peroxide initiator and thereafter grafting the maleated adduct thus prepared onto the free amino end group of a nylon polymer, such as nylon-6 or nylon-66, at an elevated temperature, illustratively by extrusion. A reinforced composite is obtained by extrusion-compounding the grafted nylon polymer with glass fiber.
Inventors
- 👤 Khemchand J. Nangrani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:08
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08G; C08G69/00; C08G69/48; C08G81/00; C08G81/02; C08G81/024; C08G81/028; C08L; C08L77/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
37 words
A fiber-reinforced molding composition comprising a grafted polyamide resin and a fiber-reinforcing material, said grafted polyamide resin obtained by heating a polyamide resin with an adduct of a polyethylene polymer and an α,β-ethylenically unsaturated dicarboxylic acid compound.
Claim 2
Dependent Claim
37 words
A fiber-reinforced molding composition comprising a grafted polyamide resin and a fiber-reinforcing material, said grafted polyamide resin obtained by heating a polyamide resin with an adduct of a polyethylene polymer and an α,β-ethylenically unsaturated dicarboxylic acid compound.
Claim 3
Dependent Claim
42 words
A composition according to claim 1 wherein the polyethylene polymer is employed in the range of from about 99.5% to about 95% by weight and the acid compound is employed in the range of from about 0.5% to about 5.0% by weight.
Claim 4
Dependent Claim
41 words
A composition according to claim 2 wherein the adduct is present in the amount of from about 2% to about 40% by weight and the nylon compound is present in the amount of from about 98% to about 60% by weight.
Claim 5
Dependent Claim
13 words
A composition according to claim 3 wherein the fiber-reinforcing material is glass fiber.
Claim 6
Dependent Claim
25 words
A composition according to claim 4 wherein the glass fibers are employed in the amount of 0% to 43% by weight of the total composition.
Claim 7
Dependent Claim
23 words
A composition according to claim 5 wherein the glass fibers are employed in the amount of about 13% to about 43% by weight.
Claim 8
Dependent Claim
11 words
A composition according to claim 5 wherein an antioxidant is present.
Claim 9
Dependent Claim
24 words
A composition according to claim 7 wherein the antioxidant is a 1:1 blend of an organic phosphite antioxidant and of a hindered phenol antioxidant.
Claim 10
Dependent Claim
15 words
A composition according to claim 5 wherein the polyethylene polymer is linear low density polyethylene.
Claim 11
Dependent Claim
16 words
A composition according to claim 9 wherein the α,β-ethylenically unsaturated dicarboxylic acid compound is maleic anhydride.
Claim 12
Dependent Claim
17 words
A composition according to claim 9 wherein the polyethylene polymer is a copolymer of ethylene and propylene.
Claim 13
Dependent Claim
16 words
A composition according to claim 11 wherein the α,β-ethylenically unsaturated dicarboxylic acid compound is maleic anhydride.
Claim 14
Dependent Claim
12 words
A composition according to claim 5 wherein the polyamide resin is polycapramide.
Claim 15
Dependent Claim
13 words
A composition according to claim 5 wherein the polyamide resin is polyhexamethylene adipamide.
Claim 16
Dependent Claim
12 words
A molded product obtained by injection molding the composition of claim 1.
Claim 17
Independent Claim
77 words
A method of making a fiber-reinforced molding composition comprising reacting a polyethylene polymer with an α,β-ethylenically unsaturated dicarboxylic acid or a derivative thereof at an elevated temperature and in the presence of an organic peroxide initiator to produce an adduct of said polyethylene polymer, intimately mixing said adduct with a polyamide under the action of heat to make a grafted polyamide resin, and compounding said grafted polyamide with a fiber-reinforcing material to make said fiber-reinforced molding composition.
Claim 18
Independent Claim
77 words
A method of making a fiber-reinforced molding composition comprising reacting a polyethylene polymer with an α,β-ethylenically unsaturated dicarboxylic acid or a derivative thereof at an elevated temperature and in the presence of an organic peroxide initiator to produce an adduct of said polyethylene polymer, intimately mixing said adduct with a polyamide under the action of heat to make a grafted polyamide resin, and compounding said grafted polyamide with a fiber-reinforcing material to make said fiber-reinforced molding composition.
Claim 19
Dependent Claim
19 words
The method of claim 16 in which said adduct is intimately mixed with said polyamide in a screw extruder.
Claim 20
Dependent Claim
24 words
The method of claim 17 in which said composition is pelletized after extrusion, said pellets upon molding providing finished articles of excellent impact strength.
Claim 21
Dependent Claim
18 words
The method according to claim 16 wherein said adduct is prepared over reaction time of about 30 seconds.
Claim 22
Dependent Claim
41 words
The method according to claim 16 wherein the adduct is present in the amount of from about 2% to about 40% by weight and the nylon compound is present in the amount of from about 98% to about 60% by weight.
Claim 23
Dependent Claim
13 words
The method according to claim 20 wherein the fiber-reinforcing material is glass fiber.
Claim 24
Dependent Claim
22 words
The method according to claim 21 wherein glass fibers are employed in the amount of about 13% to about 43% by weight.
Claim 25
Dependent Claim
18 words
The method according to claim 16 wherein the polyethylene polymer is a copolymer of ethylene and another olefin.
Claim 26
Dependent Claim
12 words
The method according to claim 23 wherein said other olefin is polypropylene.
Claim 27
Dependent Claim
15 words
The method according to claim 16 wherein a molded product is obtained by injection molding.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |