US4171298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolic ester synthetic resin stabilizers
Assignee: Adeka Corp
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Filing: 1977-10-31
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Granted: 1979-10-16
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Expires: 1997-10-31
Abstract
Abstract New ortho-alkylhydroxybenzylpropanediol compounds of carboxylic acids, aldehydes, ketones, phosphites, phosphates, and phosphonates are disclosed. The propanediol compounds have in the molecule from one to four preferably from one to three ortho-alkylhydroxybenzylpropanediol units, each of which carries one to two ortho-alkylhydroxybenzyl groups, and are highly effective stabilizers for a variety of synthetic resins.
Inventors
- 👤 Motonobu Minagawa
- 👤 Yutaka Nakahara
- 👤 Masayuki Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/1412; C07F9/28; C07F9/38; C07F9/40; C07F9/4071; C07F9/4075; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181; C07F9/6574; C07F9/65742; C07F9/65746; C08K5/0008; C08K5/005
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
80 words
An ortho-alkylhydroxybenzylpropane-1,3-diol compound having the formula ##STR117## in which R 1 is an alkyl group having 1 to 8 carbon atoms, R 2 and R 3 are hydrogen or alkyl groups having 1 to 8 carbon atoms, R is hydrogen, an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an ortho-alkylhydroxybenzyl group ##STR118## and R' is --CH 2 CH 2 --S--R 9 where ##STR119## having 1 to 30 carbon atoms.
Claim 2
Dependent Claim
80 words
An ortho-alkylhydroxybenzylpropane-1,3-diol compound having the formula ##STR117## in which R 1 is an alkyl group having 1 to 8 carbon atoms, R 2 and R 3 are hydrogen or alkyl groups having 1 to 8 carbon atoms, R is hydrogen, an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an ortho-alkylhydroxybenzyl group ##STR118## and R' is --CH 2 CH 2 --S--R 9 where ##STR119## having 1 to 30 carbon atoms.
Claim 3
Dependent Claim
14 words
An ortho-alkylhydroxybenzylpropanediol compound according to claim 1 in which the orthoalkylhydroxybenzyl group is 3,5-di-t-butyl-4-hydroxybenzyl.
Claim 4
Dependent Claim
14 words
An orthoalkylhydroxybenzylpropanediol compound according to claim 1 in which the ortho-alkylhydroxybenzyl group is 4-t-butyl-4,6-dimethyl-3-hydroxybenzyl.
Claim 5
Dependent Claim
14 words
An ortho-alkylhydroxybenzylpropanediol compound according to claim 1 in which the ortho-alkylhydroxybenzyl group is 3-t-butyl-4-hydroxy-6-methylbenzyl.
Claim 6
Dependent Claim
31 words
An ortho-alkylhydroxybenzylpropanediol compound according to claim 1 in which R is hydrogen, an alkyl group having 1 to 8 carbon atoms, or an alkyl group having 2 to 8 carbon atoms.
Claim 7
Dependent Claim
14 words
An ortho-alkylhydroxybenzylpropanediol compound according to claim 1 in which R is an ortho-alkylhydroxybenzyl group.
Claim 8
Dependent Claim
15 words
An ortho-alkylhydroxybenzylpropanediol compound according to claim 1 in which R 9 is a n-dodecyl group.
Claim 9
Dependent Claim
69 words
A stabilizer composition capable of increasing the resistance to deterioration on heating of synthetic resin, comprising an ortho-alkylhydroxybenzylpropanediol compound according to claim 1 and at least one synthetic resin stabilizer selected from the group consisting of thiodipropionate esters, 1,2-epoxides, organic phosphites, polyhydric alcohols, polyhydric alcohol 3-alkylthiopropionates, ultraviolet absorbers, heavy metal deactivators, and barium, calcium, magnesium, nickel, strontium, tin, zinc salts of monocarboxylic acids having 6 to 24 carbon atoms.
Claim 10
Dependent Claim
17 words
A stabilizer composition according to claim 8 in which the synthetic resin stabilizer is a thiodipropionate ester.
Claim 11
Dependent Claim
16 words
A stabilizer composition according to claim 8 in which the synthetic resin stabilizer is a 1,2-epoxide.
Claim 12
Dependent Claim
23 words
A stabilized synthetic resin composition comprising a synthetic resin and 0.01 to 5% by weight of an ortho-alkylhydroxybenzylpropanediol compound according to claim 1.
Claim 13
Dependent Claim
27 words
A stabilized synthetic resin composition according to claim 11 in which the synthetic resin is a polymer of an alpha olefin having 2 to 6 carbon atoms.
Claim 14
Dependent Claim
20 words
A stabilized synthetic resin composition according to claim 11 in which the synthetic resin is a polymer of vinyl chloride.
Claim 15
Dependent Claim
22 words
A stabilized synthetic resin composition according to claim 11 in which the synthetic resin is a polymer of acrylonitrile, butadiene, and styrene.
Claim 16
Dependent Claim
22 words
A stabilized synthetic resin composition according to claim 11 in which the synthetic resin is a polymer of, adipic acid and 1,6-diaminohexane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |