US4590219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of elastomeric molded parts having urethane or urethane and urea groups with improved light fastness and weather resistance
Assignee: BASF SE
•
Filing: 1983-04-22
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Granted: 1986-05-20
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Expires: 2003-04-22
Abstract
Abstract The invention relates to a process for the preparation of elastomeric molded parts having urethane or urethane and urea linkages which comprises reacting (a) an organic polyisocyanate, (b) a polyhydroxyl compound selected from the group consisting of (i) polyester polyols with molecular weights of 1000 to 3000 and hydroxyl numbers of 170 to 35 produced by polycondensation of organic dicarboxylic acids and a polyol mixture of at least 3 polyols; (ii) polyether polyols having terminal ester groups, molecular weights of 1000 to 8000 and hydroxyl numbers of 170 to 15; and (iii) mixtures thereof; (c) a chain extender wherein components (a) through (c) are processed according to reaction injection molding techniques in open or closed molds. The reaction is preferably carried out as a one-shot process and may also be carried out in the presence of blowing agents (d), auxiliaries (e), and additives (e). The non-cellular and/or microcellular elastomeric molded parts produced according to the method of this invention are particularly well suited for use in the automobile industry, for example, as bumper covers and body parts such as fenders, spoilers, wheel well expansions as well as engineering housing parts and runners. The cellular foams are used, for example, as shoe soles, armrests, headrests, safety coverings in the passenger compartment in automobiles as well as motorcycle and bicycle seats, seat cushions and cover layers in composite foams.
Inventors
- 👤 Dietmar Nissen
- 👤 Matthias Marx
- 👤 Hans U. Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:33
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4236; C08G18/4244; C08G18/4247; C08G18/4266; C08G18/4269; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G2110/00; C08G2110/0033; C08G2110/0041; C08G2110/0066; C08G2120/00; Y; Y10; Y10S; Y10S264/00; Y10S264/83
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
111 words
A process for the preparation of elastomeric molded parts having urethane or urethene and urea linkages which comprises reacting (a) an organic polyisocyanate, (b) polyester polyols with molecular weight of 1000 to 3000 and hydroxyl numbers of 170 to 35 produced by polycondensation of organic dicarboxylic acids and a polyol mixture consisting essentially of (1) 15 to 30 parts by weight of 1,4-butanediol, (2) 40 to 55 parts by weight of 1,5-pentanediol, and (3) 15 to 30 parts by weight of 1,6-hexanediol, and (c) a chain extender wherein components (a) through (c) are processed by reaction injection molding mixing techniques for casting in an open or injection into a closed mold.
Claim 2
Dependent Claim
111 words
A process for the preparation of elastomeric molded parts having urethane or urethene and urea linkages which comprises reacting (a) an organic polyisocyanate, (b) polyester polyols with molecular weight of 1000 to 3000 and hydroxyl numbers of 170 to 35 produced by polycondensation of organic dicarboxylic acids and a polyol mixture consisting essentially of (1) 15 to 30 parts by weight of 1,4-butanediol, (2) 40 to 55 parts by weight of 1,5-pentanediol, and (3) 15 to 30 parts by weight of 1,6-hexanediol, and (c) a chain extender wherein components (a) through (c) are processed by reaction injection molding mixing techniques for casting in an open or injection into a closed mold.
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein a cellular molded part is produced by incorporating a blowing agent into the formulation to produce a molded part which has a cellular core and non-cellular external skin.
Claim 4
Dependent Claim
13 words
The process of claim 1 or 2 wherein a one-shot process is used.
Claim 5
Dependent Claim
56 words
The process of claim 3 wherein the polyester polyols (i) are produced by polycondensation of organic dicarboxylic acids and a polyol mixture consisting essentially of: (a) 20 to 60 parts by weight of 1,4-butanediol, (b) 20 to 40 parts by weight of 1,6-hexanediol, and (c) 20 to 40 parts by weight of 2,2-dimethylpropanediol-1,3 and/or diethylene glycol.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein adipic acid is used as organic dicarboxylic acid for the preparation of polyhydroxyl compounds (b).
Claim 7
Dependent Claim
19 words
The process of claim 3 wherein compound (b) is mixed with conventional polyether polyols, polyester polyols, or mixtures thereof.
Claim 8
Dependent Claim
33 words
The process of claim 6 wherein 10 to 900 parts by weight of commonly used polyether polyols, polyester polyols or mixtures thereof are used per 100 parts by weight of polyhydroxyl compound (b).
Claim 9
Dependent Claim
27 words
The process of claim 3 wherein 5 to 150 parts by weight of chain extenders (c) are used per 100 parts by weight of polyhydroxyl compounds (b).
Claim 10
Dependent Claim
39 words
The process of claim 9 wherein the equivalency ratio of isocyanate groups of the polyisocyanates (a) to Zerewitinoff active hydrogen atoms bonded to OH-- or OH-- and NH 2 groups of components (b) and (c) is 1:0.85 to 1.25.
Claim 11
Dependent Claim
17 words
The process of claim 9 wherein sterically hindered primary aromatic diamines are used as chain extenders (c).
Claim 12
Dependent Claim
19 words
The process of claim 3 wherein auxiliaries and/or additives are additionally used for the preparation of the molded parts.
Claim 13
Dependent Claim
26 words
The process of claim 1 wherein the noncellular molded parts have a density of 0.8 to 1.4 grams per cubic centimeter and are produced under compression.
Claim 14
Dependent Claim
31 words
The process of claim 2 wherein the molded parts with cellular core and noncellular external skin have an overall density of 0.2 to 1.2 grams/cubic centimeters and are produced under compression.
Claim 15
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 1.
Claim 16
Dependent Claim
13 words
An elastomeric molded part prepared ln accordance with the process of claim 2.
Claim 17
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 3.
Claim 18
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 4.
Claim 19
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 5.
Claim 20
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 6.
Claim 21
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 7.
Claim 22
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 8.
Claim 23
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 9.
Claim 24
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 10.
Claim 25
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 11.
Claim 26
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 12.
Claim 27
Dependent Claim
13 words
An elastomeric molded part prepared in accordance with the process of claim 13.
References Cited (Backward Citations)
US3975128A
Cited
US4341875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |