US4556690A
Expired / Lapsed
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Acetal resin composition
Assignee: Mitsui Chemicals Inc
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Filing: 1984-05-03
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Granted: 1985-12-03
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Expires: 2004-05-03
Abstract
Abstract An acetal resin composition comprising (A) an acetal resin and (B) 1 to 200 parts by weight, per 100 parts by weight of the acetal resin (A), of at least one modified alpha-olefin polymer, said modified alpha-olefin polymer (B) being a graft-copolymerization product of 100 parts by weight of an alpha-olefin polymer and 0.01 to 10 parts by weight of an unsaturated carboxylic acid or its derivative.
Inventors
- 👤 Mikio Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:44
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/06; C08L59/00; C08L59/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
170 words
An acetal resin composition comprising (A) 100 parts by weight of an acetal resin containing at least 80 mole percent of oxymethylene units in the main chain and having a melt flow rate of 0.1 to 50 g/10 min., and (B) 1 to 200 parts by weight of at least one graft modified alpha-olefin polymer which has (a) a degree of crystallinity of from 0 to 85%, (b) an intrinsic viscosity in decalin at 135° C. of from 0.5 to 7 dl/g, and (c) a molecular weight distribution (Mw/Mn) of from 1.5 to 30, and (d) wherein the at least one graft modified polymer is a graft-copolymerization product of 100 parts by weight of an alpha-olefin polymer and 0.01 to 10 parts by weight of an unsaturated mono or dicarboxylic acid having from 3 to 20 carbon atoms or the anhydrides, lower alkyl esters, amides, imides and halides thereof, and (e) is dispersed in the acetal resin (A) as particles having a particle size of not more than 10 microns.
Claim 2
Dependent Claim
170 words
An acetal resin composition comprising (A) 100 parts by weight of an acetal resin containing at least 80 mole percent of oxymethylene units in the main chain and having a melt flow rate of 0.1 to 50 g/10 min., and (B) 1 to 200 parts by weight of at least one graft modified alpha-olefin polymer which has (a) a degree of crystallinity of from 0 to 85%, (b) an intrinsic viscosity in decalin at 135° C. of from 0.5 to 7 dl/g, and (c) a molecular weight distribution (Mw/Mn) of from 1.5 to 30, and (d) wherein the at least one graft modified polymer is a graft-copolymerization product of 100 parts by weight of an alpha-olefin polymer and 0.01 to 10 parts by weight of an unsaturated mono or dicarboxylic acid having from 3 to 20 carbon atoms or the anhydrides, lower alkyl esters, amides, imides and halides thereof, and (e) is dispersed in the acetal resin (A) as particles having a particle size of not more than 10 microns.
Claim 3
Dependent Claim
38 words
The composition of claim 1 wherein the modified alpha-olefinic polymer (B) is obtained by grafting 0.05 to 5 parts by weight of the unsaturated carboxylic acid or its derivative to 100 parts by weight of the alpha-olefin polymer.
Claim 4
Dependent Claim
28 words
The composition of claim 1 wherein the unsaturated carboxylic acid or its derivative is selected from the group consisting of maleic acid and endocisbicyclol[2.2.1]hept-5-ene-2,3-dicarboxylic acid and their anhydrides.
Claim 5
Dependent Claim
49 words
The composition of claim 1 wherein the alpha-olefin polymer is an alpha-olefin elastomeric polymer having a degree of crystallinity of not more than 30%, an intrinsic viscosity [η] in decalin at 135° C. of 0.5 to 7 dl/g and a glass transition temperature of not more than 0° C.
Claim 6
Dependent Claim
48 words
The composition of claim 1 wherein the alpha-olefin polymer is a crystalline alpha-olefin polymer having a degree of crystallinity of 35 to 80%, an intrinsic viscosity [η] in decalin at 135° C. 0.5 to 7 dl/g and a melting point of about 80° C. to about 280° C.
Claim 7
Dependent Claim
25 words
The composition of claim 1 wherein the alpha-olefin polymer is selected from the group consisting of ethylene/propylene copolymer, ethylene/1-butene copolymer, ethylene/propylene/diene terpolymer, and ethylene/1-butene/diene terpolymer.
Claim 8
Dependent Claim
54 words
The composition of claim 1 wherein the modified alpha-olefin polymer has a degree of crystallinity of not more than 20%, an intrinsic viscosity [η] in decalin at 135° C. of 0.5 to 7 dl/g, a molecular weight distribution (Mw/Mn) of 1.5 to 30 and a glass transition temperature of not more than 0° C.
Claim 9
Dependent Claim
30 words
The composition of claim 1 wherein the modified alpha-olefin polymer or a blend of at least two modified alpha-olefin polymers has a degree of crystallinity of not more than 50%.
Claim 10
Dependent Claim
31 words
The composition of claim 1 wherein the modified alpha-olefin polymer or a blend of at least two modified alpha-olefin polymers has a tensile modulus of 5 to 17000 kg/cm 2 .
Claim 11
Dependent Claim
33 words
The composition of claim 1 wherein the modified alpha-olefin polymer (B) is contained in an amount of 5 to 100 parts by weight per 100 parts by weight of the acetal resin (A).
Claim 12
Dependent Claim
19 words
The composition of claim 8 which further comprises 1 to 1000 parts by weight of an unmodified alpha-olefin polymer.
Claim 13
Dependent Claim
40 words
The composition of claim 11 wherein the unsaturated carboxylic acid or its derivative is contained in a proportion of 0.01 to 8% by weight based on the total weight of the modified alpha-olefin polymer (B) and the unmodified alpha-olefin polymer.
Claim 14
Dependent Claim
23 words
The composition of claim 1 which has been heat-aged at a temperature of 50° C. to 200° C. for at least 30 minutes.
Claim 15
Dependent Claim
16 words
The composition of claim 13 wherein the heat-aging is carried out for at least 1 hour.
Claim 16
Dependent Claim
35 words
The composition of claim 1, wherein the acetal resin (A) contains at least 90 mole % of oxymethylene units in the main chain and has a melt flow rate of 0.2 to 30 g/10 min.
Claim 17
Dependent Claim
48 words
The composition of claim 1 wherein the unsaturated carboxylic acid is selected from the group consisting of acrylic acid, methacrylic acid, alpha-ethylacrylic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, tetrahydrophthalic acid, endocisbicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid, methyl-endocisbicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid, and the anhydrides, lower alkyl esters, amides, imides and halides thereof.
Claim 18
Dependent Claim
51 words
The composition of claim 1 wherein the at least one graft modified alpha-olefin polymer (B) has (a) a degree of crystallinity of from 1 to 80%, (b) an intrinsic viscosity in decalin at 135° C. of 0.7 to 5 dl/g, and (c) a molecular weight distribution of from 2.0 to 25.
Claim 19
Dependent Claim
20 words
The composition of claim 17 wherein the modified alpha-olefin polymer has a degree of crystallinity of from 1 to 19%.
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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |